Caterpillarwork toolhammer

Caterpillar H90C

Maintenance schedule, common problems & OEM parts breakdown

The Caterpillar H90C is a hydraulic hammer (breaker) work tool, not a self-propelled machine. It mounts on host excavators and backhoe loaders in roughly the 7-12 tonne operating-weight class, documented against carriers such as the 307D-312D excavator range and the 416E-450E backhoe loader range. Operating weight varies by configuration: about 547 kg (1,206 lb) in pin-on form, 590 kg (1,300 lb) in the standard flat-top bracket, and 600 kg (1,320 lb) in the sound-suppressed flat-top (H90C S). The tool carries no engine, transmission, or undercarriage of its own. It runs entirely on hydraulic flow and pressure drawn from the carrier's auxiliary circuit, rated at roughly 60-150 L/min (16-40 gal/min) at about 135 bar (1,958 psi). Cat catalogued the H90C alongside the H70, H70 S, and the sound-suppressed H90C S as one hydraulic-hammer family, with build records showing production running at least through 2011-2012.

Across catalog editions the H90C came in pin-on and flat-top mounting, in plain and sound-suppressed acoustic-enclosure builds, all sharing the same core hammer mechanism and tool sizing. Published figures shift a little between editions: energy class is factory-rated at 1,000 ft-lb (1,356 J), though some secondary listings cite up to 1,200-1,500 ft-lb, and recommended carrier weight is given as either 6-12 t or 7-12 t depending on the source. No confirmed successor model has turned up in research to date. In the used market the hammer and its wear parts, tool bushings, retaining pins, seal kits, and the membrane-style nitrogen accumulator, stay in steady demand because the H90C still fits a wide band of compact excavators and backhoe loaders that remain in daily service. Bushing play and accumulator condition, not an hour meter the tool doesn't have, are what actually set resale value on a used unit.

Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.

Caterpillar H90C specifications

Engine

Onboard engine	Not applicable. The H90C is a hydraulic hammer work tool with no engine of its own — it is powered entirely by the carrier machine's hydraulic system.
Power source	Carrier-supplied hydraulic flow and pressure only; no displacement, cylinder count, or emissions tier applies to the tool itself.

Weights

Recommended carrier (host) weight	6,000–12,000 kg (13,200–26,400 lb) per one factory catalog edition; 7,000–12,000 kg (15,400–26,400 lb) per another — varies by catalog edition/series. Typical hosts are mini excavators, skid steers, and backhoe loaders in this class.
Working weight, flat-top (standard)	590 kg (1,300 lb). Includes hammer, standard tool, and average mounting bracket.
Working weight, flat-top (sound-suppressed / S)	600 kg (1,320 lb). Sound-suppressed versions run slightly heavier than the standard flat-top.
Working weight, pin-on configuration	547 kg (1,206 lb) per earlier factory literature — differs from the flat-top figures above; treat as varying by configuration and catalog edition rather than a contradiction.
Shipping weight	Not separately published. Working weight above (hammer, tool, and mounting bracket) is the closest documented figure.
Ground pressure	Not applicable / not published. The H90C is a carrier-mounted attachment, not a self-propelled undercarriage machine.

Dimensions

Overall length, flat-top (standard)	1,286 mm (50.6 in), hammer housing/side plate length with tool installed.
Overall length, flat-top (sound-suppressed / S)	1,294 mm (50.9 in).
Overall length, pin-on configuration	1,325 mm (52.1 in).
Frontal width	510 mm (20.1 in) flat-top standard; 520 mm (20.5 in) sound-suppressed flat-top; 749 mm (29.4 in) pin-on configuration (measured across the mounting ears).
Lateral width	380 mm (15.0 in) flat-top standard; 400 mm (15.7 in) sound-suppressed flat-top; 348 mm (13.7 in) pin-on configuration.
Tool (bit) diameter	84 mm (3.3 in).
Tool working length (typical)	417 mm (16.4 in). Actual length varies by tool type — chisel, moil, blunt, or spade.
Transport dimensions	Not applicable as a standalone transport envelope. Figures above are the mounted hammer/tool dimensions; overall transport size depends on the host carrier machine.

Performance

Travel speed	Not applicable. The H90C has no self-propulsion; it moves only with the carrier machine.
Impact (blow) frequency	500–1,450 blows per minute.
Energy class (impact energy)	1,000 ft-lb (1,356 J) per factory specification. Some secondary listings cite figures up to roughly 1,200–1,500 ft-lb — treat the higher figures as unverified against current dealer literature and use the factory value as the reference.
Gradeability	Not applicable.
Recommended host machine class	Mini excavators, skid steers, and backhoe loaders in roughly the 6–12 tonne (13,200–26,400 lb) operating-weight class. Matched carriers span the mid-size excavator and backhoe loader range across successive model generations, per factory hammer-to-carrier matching guidance.

Service capacities (summary)

Fuel tank	Not applicable — no onboard engine.
Acceptable hydraulic oil flow	60–150 L/min (16–40 gal/min), supplied by the carrier's auxiliary hydraulic circuit.
Operating pressure	Approximately 135 bar (1,958 psi / 13,500 kPa) at maximum flow and back pressure. This figure agrees exactly across independent factory catalog editions.
Engine oil	Not applicable — no onboard engine.
Cooling system	Not applicable — no onboard engine. Heat generated in use is dissipated through the carrier's hydraulic system.
Hydraulic circuit requirement	Single-action tool control circuit with high-pressure lines. The hammer has no separate onboard hydraulic reservoir; it draws directly from the carrier's system.

Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.

H90C fluids & capacities

System	Capacity	Recommended fluid
Engine crankcase / cooling system / fuel tank / transmission / final drives / axles	Not applicable	H90C is a passive hydraulic hammer (breaker) work tool with no engine, no fuel tank, no cooling system, and no drivetrain of its own. It mounts to a host excavator or backhoe loader and runs entirely off that carrier's hydraulic circuit, so none of these systems exist on the tool itself.
Hydraulic oil (carrier-supplied, no tool-side reservoir)	No dedicated tank or fill volume on the hammer. Rated hydraulic flow is 60-150 L/min (16-39 US gal/min) at an operating pressure of 135 bar (1,958 psi), sized for excavator/backhoe carriers in the roughly 7,000-12,000 kg (15,400-26,400 lb) operating-weight class.	Draws directly from the carrier's own hydraulic tank - there is no separate oil spec for the hammer. Use whatever Cat-approved anti-wear hydraulic fluid (Cat HYDO Advanced or equivalent viscosity-graded hydraulic oil) the carrier's own operation and maintenance manual calls for; match the carrier's climate-graded viscosity recommendation rather than a hammer-specific one.
Hydraulic accumulator gas charge (low-pressure membrane accumulator plus a separate high-pressure accumulator)	Precharged with dry nitrogen gas through a dealer charging valve/kit; no single precharge pressure figure is published in general dealer literature for this size class, and it should be confirmed against the H90C-specific charging procedure rather than assumed from a different hammer size.	Dry industrial-grade nitrogen (N2) only, introduced via the Cat accumulator charging adapter and gauge set. Never substitute compressed air or oxygen.
Tool bushing / retaining-pin grease points (upper and lower)	No bulk fill capacity - grease is applied by hand at the marked grease fitting(s) until fresh grease purges the joint, or continuously if a hammer-mounted or carrier-mounted auto-lube unit is fitted (check cartridge/reservoir level before each shift instead of manual greasing).	Cat Hydraulic Hammer Paste, a copper-and-graphite lubricant built for the heat, shock loading, and friction at the hammer tool/bushing interface (NLGI grade 2); not a standard chassis grease. If unavailable, use a dealer-approved extreme-pressure grease with a moly or similar EP additive.

Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.

Caterpillar H90C maintenance schedule

Service interval	Tasks
Every 50 h	Before starting work each shift, grease the upper and lower tool bushings until fresh grease purges at the fitting. Check the tool for front-to-back play against the lower bushing before hammering; do not run the tool with a loose bushing. Inspect the front head, side bolts, and hose fittings daily for oil weeping or loosened hardware. Weekly, confirm the carrier's auxiliary circuit flow and pressure settings still match the hammer's rated spec. Weekly, inspect hoses and quick-couplers for chafing, cracking, or leaks. Weekly, check the mounting bracket pins and tool retaining pin for looseness or wear.
Every 250 h	Verify nitrogen accumulator precharge with a calibrated gauge; recharge with dry nitrogen only if low. Re-torque mounting bracket bolts and housing through-bolts to the specified value. Pull the retaining pin and inspect the lower bushing bore for wear or oversize play; rotate the pin if it has started to groove on one side. Inspect the tool shank collar for mushrooming or cracking. Check the carrier's hydraulic oil level and condition, since the hammer draws from the carrier's own tank.
Every 500 h	Remove the tool and inspect the upper bushing and dust seal for wear or damage. Check the housing and mounting bracket welds for cracking, especially around the mounting ears. Replace the lower tool bushing if play exceeds the service limit found at the prior inspection. Send a sample of the carrier's hydraulic oil for analysis to catch early contamination from a hammer-side seal. Inspect the membrane accumulator housing for leaks or corrosion.
Every 1,000 h	Disassemble the hammer far enough to inspect the piston, cylinder bore, and control valve for wear or scoring. Replace the seal kit as a complete set regardless of individual seal condition. Inspect the nitrogen accumulator membrane and recharge or replace it as needed. Replace the lower bushing if it is approaching its wear limit rather than waiting for it to fail. Check all hoses, fittings, and the hammer-to-carrier coupling for age-related hardening or cracking.
Every 2,000 h	Do a full teardown inspection of the piston and cylinder bore; recondition or replace both if wear exceeds factory tolerance. Replace all wear bushings, seal kits, and the accumulator membrane as a set. Inspect and resurface or replace backhead and control valve components showing wear. Re-torque and inspect the entire mounting bracket and sideplate assembly for fatigue cracking. Bench-test blow rate and cycling against factory spec before returning the hammer to service.
Every 4,000 h	At major overhaul, typically several thousand hours in or sooner if impact energy or blow rate drops off, rebuild the hammer completely: piston, cylinder bore, all bushings, seal kits, and the accumulator assembly. Inspect the working tool itself and retire it if the shank is undersize, cracked, or mushroomed beyond service limits. Verify the carrier's auxiliary circuit relief valve and flow setting still match the hammer's spec before returning it to work.

Servicing the H90C beyond the schedule

Predictive Maintenance & Fluid Analysis

Track how much grease each tool bushing takes before it purges fresh grease at the fitting; a fitting that suddenly takes less signals a worn or scored bushing bore. The H90C has no reservoir of its own, so watch the carrier's hydraulic oil instead: darkening oil or a rising particle count on an oil analysis often means a hammer-side seal has started to pass. Check nitrogen accumulator precharge with a calibrated gauge on a fixed schedule, not by ear or feel.

Corrective & Common Repairs

Most H90C repairs start at the tool end. A lower bushing worn past its play limit lets the tool rock and knocks the piston off-axis, so replace the slip-fit bushing before it scores the cylinder bore. Rotate or replace retaining pins once they groove on one side instead of reusing them. Oil weeping at the front head or side bolts usually means loosened through-bolts, not a bad seal, so retorque first. Reface or replace the tool shank collar if it shows mushrooming or cracking.

Overhaul & Rebuild Points

A full H90C rebuild centers on the piston and cylinder bore. Once bushing wear lets the piston strike the bore off-center, scoring accelerates, so measure bore diameter and piston OD against factory tolerance at teardown instead of reusing a marginal bore. Replace the seal kit as a complete set rather than piece by piece. Service the membrane-style nitrogen accumulator and re-precharge to spec before reassembly. Bench-test blow rate and cycling before the hammer goes back on a carrier.

Seasonal & Environment Servicing

Nitrogen precharge drops roughly 3-4% for every 10°C the ambient temperature falls, so recheck accumulator charge before cold-weather work instead of trusting a summer setting. Cold also stiffens bushing seals, so cycle the hammer lightly before hard breaking in freezing conditions. In abrasive demolition or wet trenching, grit loads the grease points faster than normal duty, so shorten the manual greasing interval or run the auto-lube option if fitted, and check the lower bushing dust seal more often in mud.

H90C common service parts

Part number	Part	Notes
8T-7915	Adapter-To Transmission Filter	Scheduled service item	Check fitment →

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H90C attachments & work tools

Host carrier weight class

Sized for carriers in roughly the 7-12 t (15,400-26,400 lb) operating-weight range. Documented hosts fall in the compact excavator class around 307-312 and backhoe loaders in the 416-450 class; exact approved-carrier list varies by dealer bracket program.

Hammer operating weight and energy class

Working weight sits near 590-640 kg (1,300-1,410 lb) depending on listing; impact energy class runs roughly 1,200-1,500 ft-lb with impact frequency around 500-1,450 blows per minute. Figures vary by configuration/series and source.

Working tools (tool bits)

Offered with interchangeable moil point, chisel, and blunt working tools in the roughly 84-85 mm (3.3 in) tool-diameter class. Moil suits general breaking, chisel suits directional slab and asphalt work, blunt suits compaction-style demolition.

Mounting bracket and sideplate system

Mounts via a carrier-specific top-mount (box-type) bracket with sideplates sized to the host stick and link pin dimensions rather than a universal skid-steer quick-attach plate. Lower tool bushings are slip-fit and field-replaceable, secured with a single locking pin for easier bushing service.

Auxiliary hydraulic circuit requirement

Needs an auxiliary (hammer) hydraulic circuit on the carrier. Documented acceptable flow is roughly 60-150 lpm (16-39 gpm) at a working pressure near 135 bar (about 1,960 psi); exact figures vary by configuration/series and carrier pump setup. Carriers without factory hammer plumbing need a dealer-installed aux line and relief-valve kit.

Pressure protection (accumulator)

Uses a membrane-style (nitrogen) back-head accumulator rather than a gas-bag design, aimed at lower maintenance and at damping hydraulic pressure spikes back into the carrier's pump.

Sound-suppressed factory configuration

Offered as a standard open hammer and as a silenced 's'-suffix version (H90Cs) with an acoustic enclosure for noise-restricted or residential demolition sites. Both share the same base hammer mechanism and tool sizing.

Auto-lubrication option

An automatic greasing system for the tool bushing area is available as a factory/dealer option, cutting down on manual grease-nipple servicing versus the standard hammer.

All H90C assemblies by section

Every catalogued assembly group for the Caterpillar H90C. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Frame And Body

203-0908 Head Gp-Front

20***08	Head Group-Front	1
3J***07	Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve	1
3K***60	Seal Pilot Manifold On; Seal To Boom Check Valve Drain	1
3Q***25	Fitting-Hydraulic	2

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203-0912 Head Gp-Front

20***12	Head Group-Front	1
3J***07	Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve	1
3K***60	Seal Pilot Manifold On; Seal To Boom Check Valve Drain	1
3Q***25	Fitting-Hydraulic	2

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203-0932 Head Gp-Front

20***32	Head Group-Front	1
3J***07	Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve	1
3K***60	Seal Pilot Manifold On; Seal To Boom Check Valve Drain	1
3Q***25	Fitting-Hydraulic	2

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203-0927 Head Gp-Front

20***27	Head Group-Front	1
3J***07	Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve	1
3K***60	Seal Pilot Manifold On; Seal To Boom Check Valve Drain	1
3Q***25	Fitting-Hydraulic	2

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203-0922 Head Gp-Front

20***22	Head Group-Front	1
3J***07	Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve	1
3K***60	Seal Pilot Manifold On; Seal To Boom Check Valve Drain	1
3Q***25	Fitting-Hydraulic	2

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108-9421 Plate Gp-Hammer

09***69	Pin-Cotter	2
10***14	Spacer	2
10***15	Spacer	2
10***16	Spacer	4

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157-2242 Plate Gp-Hammer

10***47	Pin-Spring	2
12***37	Buffer	2
15***94	Plate Set-Housing	1
15***42	Plate Group-Hammer	1

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152-0965 Plate Gp-Hammer

15***65	Plate Group-Hammer	1
15***79	Buffer	1
15***87	Plate Set-Housing	1
15***89	Rod-Threaded	2

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191-9801 Plate Gp-Hammer

09***69	Pin-Cotter	2
10***15	Spacer	2
19***00	Plate Group-Hammer	1
19***01	Plate Group-Hammer	1

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124-5316 Plate Gp-Hammer

10***14	Spacer	2
10***15	Spacer	2
10***16	Spacer	4
12***16	Plate Group-Hammer	1

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152-2516 Plate Gp-Hammer

12***66	Pin	2
15***79	Buffer	2
15***16	Plate Group-Hammer	1
15***17	Plate Set-Housing	1

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157-2241 Plate Gp-Hammer

10***47	Pin-Spring	2
12***35	Tube-Spacer	2
12***37	Buffer	2
15***30	Bushing	2

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158-4540 Plate Gp-Hammer

15***40	Plate Group-Hammer	1
15***55	Plate Set-Housing	1
3E***01	Lockwasher	8
3Q***03	Buffer	1

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112-4843 Plate Gp-Hammer

09***70	Pin-Cotter	2
11***43	Plate Group-Hammer	1
12***34	Plate Set-Housing	1
12***35	Tube-Spacer	2

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157-2208 Plate Gp-Hammer

10***47	Pin-Spring	2
12***37	Buffer	2
12***66	Pin	2
15***92	Plate Set-Housing	1

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138-1138 Plate Gp-Hammer

12***37	Buffer	2
12***40	Pin-Cotter	2
12***66	Pin	2
13***38	Plate Group-Hammer	1

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171-1375 Plate Gp-Hammer

09***69	Pin-Cotter	2
10***15	Spacer	2
17***75	Plate Group-Hammer	1
17***76	Plate Set-Housing	1

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130-3794 Plate Gp-Hammer

09***69	Pin-Cotter	2
13***94	Plate Group-Hammer	1
3E***01	Lockwasher	8
3Q***02	Plate Set-Housing	1

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158-4544 Plate Gp-Hammer

12***66	Pin	2
15***96	Pad-Buffer	1
15***44	Plate Group-Hammer	1
15***45	Plate Set-Housing	1

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124-4706 Plate Gp-Hammer

09***73	Bolt; (Socket Head) (M12x1.75x60mm)	8
12***35	Tube-Spacer	2
12***36	Ring-Spacer	16
12***37	Buffer	2

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152-0963 Plate Gp-Hammer

12***66	Pin	2
15***63	Plate Group-Hammer	1
15***78	Plate Set-Housing	1
15***79	Buffer	1

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124-9642 Plate Gp-Hammer

12***42	Plate Group-Hammer	1
12***59	Plate Set-Housing	1
12***60	Damper-Lh	1
12***61	Damper-Rh	1

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152-2524 Plate Gp-Hammer

15***79	Buffer	2
15***24	Plate Group-Hammer	1
15***25	Plate Set-Housing	1
15***14	Rod-Threaded	2

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194-6506 Plate Gp-Hammer

10***47	Pin-Spring	2
12***35	Tube-Spacer	2
12***37	Buffer	2
19***05	Plate Set-Housing	1

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138-1114 Plate Gp-Hammer

09***73	Bolt; (Socket Head) (M12x1.75x60mm)	8
12***37	Buffer	2
12***40	Pin-Cotter	2
13***14	Plate Group-Hammer	1

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158-4542 Plate Gp-Hammer

12***66	Pin	2
15***42	Plate Group-Hammer	1
15***48	Plate Set-Housing	1
15***49	Damper-Rh	1

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121-9539 Plate Gp-Hammer

10***15	Spacer	2
12***39	Plate Group-Hammer	1
12***40	Plate As-Lh	1
12***41	Plate As-Rh	1

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Hydraulic System

187-5338 Accumulator Gp-Hydraulic

15***50	Base; (High Pressure)	1
15***51	Cover	1
15***52	Diaphragm; (High Pressure)	1
15***53	Kit-Seal	1

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209-7382 Accumulator Gp-Hydraulic

15***28	Kit-Seal	1
20***77	Cover	1
20***82	Accumulator Group-Hydraulic	1
20***83	Plug As	1

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229-1547 Accumulator Gp-Hydraulic

09***06	Bolt-Socket Head; (M16x2x80-mm)	4
10***45	Kit-Seal	1
10***49	Base	1
10***54	Diaphragm	1

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209-7381 Accumulator Gp-Hydraulic

20***78	Cover	1
20***81	Accumulator Group-Hydraulic	1
20***83	Plug As	1
3E***24	Lockwasher	8

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122-7317 Accumulator Gp-Hydraulic

11***98	Base; (High Pressure)	1
11***99	Cover-Accumulator	1
11***09	Membrane-Accumulator	1
11***12	Kit-Seal	1

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229-1501 Accumulator Gp-Hydraulic

12***51	Kit-Seal	1
15***11	Base; (High Pressure)	1
15***13	Diaphragm	1
20***83	Plug As	1

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229-1540 Accumulator Gp-Hydraulic

15***47	Base; (Low Pressure)	1
15***49	Diaphragm	1
15***53	Kit-Seal	1
20***83	Plug As	1

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229-2894 Accumulator Gp-Hydraulic

09***27	Seal-O-Ring	1
11***93	Base; (Low Pressure)	1
11***95	Membrane-Accumulator	1
11***97	Bolt	8

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122-7314 Accumulator Gp-Hydraulic

09***27	Seal-O-Ring	1
11***93	Base; (Low Pressure)	1
11***94	Cover-Accumulator	1
11***95	Membrane-Accumulator	1

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3q-7304 Accumulator Gp-Hydraulic

15***28	Kit-Seal	1
3E***24	Lockwasher	4
3E***34	Seal-O-Ring	1
3Q***04	Accumulator Group-Hydraulic	1

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122-7956 Accumulator Gp-Hydraulic

10***45	Kit-Seal	1
10***51	Diaphragm	1
10***55	Base	1
10***56	Cover	1

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187-5339 Accumulator Gp-Hydraulic

15***47	Base; (Low Pressure)	1
15***48	Cover	1
15***49	Diaphragm	1
15***53	Kit-Seal	1

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229-1539 Accumulator Gp-Hydraulic

15***50	Base; (High Pressure)	1
15***52	Diaphragm; (High Pressure)	1
15***53	Kit-Seal	1
20***83	Plug As	1

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187-5289 Accumulator Gp-Hydraulic

11***09	Membrane-Accumulator	1
15***09	Base; (Low Pressure)	1
15***10	Cover	1
15***15	Kit-Seal	1

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229-1502 Accumulator Gp-Hydraulic

11***09	Membrane-Accumulator	1
12***51	Kit-Seal	1
15***09	Base; (Low Pressure)	1
20***83	Plug As	1

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187-7734 Accumulator Gp-Hydraulic

15***28	Kit-Seal	1
18***34	Accumulator Group-Hydraulic	1
3E***24	Lockwasher	8
3E***05	Seal-O-Ring	1

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229-1546 Accumulator Gp-Hydraulic

10***45	Kit-Seal	1
10***51	Diaphragm	1
10***55	Base	1
20***83	Plug As	1

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232-3123 Accumulator Gp-Hydraulic

15***28	Kit-Seal	1
20***78	Cover	1
20***83	Plug As	1
23***23	Accumulator Group-Hydraulic	1

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229-2893 Accumulator Gp-Hydraulic

11***98	Base; (High Pressure)	1
11***09	Membrane-Accumulator	1
11***12	Kit-Seal	1
20***83	Plug As	1

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3q-7305 Accumulator Gp-Hydraulic

3E***24	Lockwasher	8
3E***04	Seal-O-Ring; (119.5mm Id)	1
3Q***05	Accumulator Group-Hydraulic	1
3Q***19	Bottom	1

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122-7955 Accumulator Gp-Hydraulic

09***06	Bolt-Socket Head; (M16x2x80-mm)	4
10***45	Kit-Seal	1
10***49	Base	1
10***50	Cover	1

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187-5290 Accumulator Gp-Hydraulic

15***11	Base; (High Pressure)	1
15***12	Cover	1
15***13	Diaphragm	1
15***15	Kit-Seal	1

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191-4886 Chart-Connecting Lines

19***86

Chart-Connecting Lines

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190-1446 Chart-Connecting Lines

19***46

Chart-Connecting Lines

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109-4745 Kit-Seal

10***45	Kit-Seal	1
10***91	Seal-O-Ring	1
10***92	Seal-O-Ring	2
10***56	Seal	1

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120-7351 Kit-Seal

09***83	Seal-O-Ring (Id=174.00mm)	1
12***31	Shim, .025" Thk.	2
12***33	Seal	1
12***34	Wiper	1

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3q-7325 Kit-Seal

11***22	Seal	1
3E***02	Seal-O-Ring; (104.5mm Id)	2
3E***04	Seal-O-Ring; (119.5mm Id)	1
3E***14	Seal-O-Ring	2

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116-8212 Kit-Seal

09***27	Seal-O-Ring	1
11***86	Seal	2
11***87	Seal	4
11***90	Seal; (90.0mm Id)	1

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150-8828 Kit-Seal

15***28	Kit-Seal	1
15***22	Seal	1
15***36	Seal	2
15***37	Seal	1

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152-2515 Kit-Seal

10***60	Seal	1
14***14	Seal-U-Cup	1
15***90	Seal-Wiper	1
15***91	Seal	1

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152-2553 Kit-Seal

10***58	Seal	1
15***53	Kit-Seal	1
15***09	Seal	1
15***11	Seal	2

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206-7693 Lines Gp-Connecting

13***63	Hose As	2
20***93	Lines Group-Connecting	1
5K***90	Seal-To Hydraulic Cooler Inlet Port	4
6V***35	Connector-Seal; (1- 5/16-12)	4

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202-9128 Lines Gp-Connecting

17***64	Hose As	2
20***28	Lines Group-Connecting	1
3D***24	O-Ring - For Oil Drain & Level Plug (Items 3 & 7)	2
6V***37	Adapter; (-12/-12 Orb/Orfs)	2

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153-6477 Lines Gp-Connecting

15***96	Fitting As; (Quick Disconnect, Male)(Quick Disconnect)	1
15***97	Fitting As; (Quick Disconnect, Female)	1
15***81	Hose As	2
15***77	Lines Group-Connecting	1

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203-0981 Lines Gp-Connecting

15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
18***41	Hose As	2
20***81	Lines Group-Connecting	1

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161-1511 Lines Gp-Connecting

10***01	Fitting; (Quick Disconnect, Female)	2
10***06	Fitting; (Quick Disconnect, Male)	2
12***34	Coupling As	2
14***98	Grommet	4

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203-1008 Lines Gp-Connecting

15***96	Fitting As; (Quick Disconnect, Male)(Quick Disconnect)	1
15***97	Fitting As; (Quick Disconnect, Female)	1
15***81	Hose As	2
20***08	Lines Group-Connecting	1

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203-1011 Lines Gp-Connecting

15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
15***81	Hose As	2
20***11	Lines Group-Connecting	1

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206-7756 Lines Gp-Connecting

10***01	Fitting; (Quick Disconnect, Female)	1
10***06	Fitting; (Quick Disconnect, Male)	1
12***57	Hose-Supply	1
12***59	Hose-Return	1

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177-1866 Lines Gp-Connecting

17***66	Lines Group-Connecting	1
17***64	Hose As	2
17***88	Adapter As	2
6V***57	Seal-O-Ring (Id=29.74mm)	1

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157-7194 Lines Gp-Connecting

15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
15***81	Hose As	2
15***94	Lines Group-Connecting	1

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203-0998 Lines Gp-Connecting

15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
15***81	Hose As	2
20***98	. Spring, Lines Group-Connecting	1

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171-2566 Lines Gp-Connecting

15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
16***79	Adapter	2
16***43	Seal	1

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206-7694 Lines Gp-Connecting

13***83	Hose As	2
20***94	Lines Group-Connecting	1
5K***90	Seal-To Hydraulic Cooler Inlet Port	4
6V***35	Connector-Seal; (1- 5/16-12)	4

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177-1871 Lines Gp-Connecting

17***71	Lines Group-Connecting	1
17***59	Hose As	2
6V***16	Connector-Seal; (1- 5/16-12)	2
6V***46	Seal-O-Ring	2

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203-0977 Lines Gp-Connecting

15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
17***58	Hose As	2
20***77	Lines Group-Connecting	1

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202-9134 Lines Gp-Connecting

17***64	Hose As	2
20***34	Lines Group-Connecting	1
6V***46	Seal-O-Ring	4
7M***85	Seal,Adapter,Motor Part Of Kit P/N 5r***29	2

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158-4617 Lines Gp-Connecting

15***17	Lines Group-Connecting	1
6V***16	Connector-Seal; (1- 5/16-12)	4
6V***46	Seal-O-Ring	4
7M***85	Seal,Adapter,Motor Part Of Kit P/N 5r***29	4

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172-3412 Lines Gp-Connecting

15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
16***79	Adapter	2
16***43	Seal	1

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159-2065 Lines Gp-Connecting

15***65	Lines Group-Connecting	1
17***70	Hose As	2
17***88	Adapter As	2
6V***57	Seal-O-Ring (Id=29.74mm)	1

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203-0984 Lines Gp-Connecting

10***15	Connector	2
15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
16***85	Hose As	2

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174-2299 Lines Gp-Connecting

10***01	Fitting; (Quick Disconnect, Female)	1
10***06	Fitting; (Quick Disconnect, Male)	1
13***75	Hose As	2
17***99	Lines Group-Connecting	1

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294-9536 Lines Gp-Connecting

10***01	Fitting; (Quick Disconnect, Female)	1
10***06	Fitting; (Quick Disconnect, Male)	1
29***36	Lines Group-Connecting	1
29***25	Hose As	2

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202-9130 Lines Gp-Connecting

20***30	Lines Group-Connecting	1
21***69	Hose As	2
6V***16	Connector-Seal; (1- 5/16-12)	2
6V***46	Seal-O-Ring	4

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261-9508 Lines Gp-Connecting

26***08	Lines Group-Connecting	1
4J***20	Seal (For Tilt Ports On Valve)	2
5K***90	Seal-To Hydraulic Cooler Inlet Port	2
6V***16	Connector-Seal; (1- 5/16-12)	2

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206-7696 Lines Gp-Connecting

13***61	Hose As	2
14***35	Connect Group; (Each Includes)	2
20***96	Lines Group-Connecting	1
3D***24	O-Ring - For Oil Drain & Level Plug (Items 3 & 7)	2

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177-1907 Lines Gp-Connecting

17***07	Lines Group-Connecting	1
17***05	Hose As	2
1P***02	Seal-Rectangular 28.83mm(1.136in) Id	2
4I***65	Boss	2

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203-1014 Lines Gp-Connecting

15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
17***58	Hose As	2
20***14	Lines Group-Connecting	1

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202-9129 Lines Gp-Connecting

17***50	Hose As	2
20***29	Lines Group-Connecting	1
3D***24	O-Ring - For Oil Drain & Level Plug (Items 3 & 7)	2
6V***37	Adapter; (-12/-12 Orb/Orfs)	2

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206-7691 Lines Gp-Connecting

10***01	Fitting; (Quick Disconnect, Female)	1
10***06	Fitting; (Quick Disconnect, Male)	1
12***57	Hose-Supply	1
12***59	Hose-Return	1

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206-7695 Lines Gp-Connecting

13***63	Hose As	2
14***35	Connect Group; (Each Includes)	2
20***95	Lines Group-Connecting	1
3D***24	O-Ring - For Oil Drain & Level Plug (Items 3 & 7)	2

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180-4179 Lines Gp-Connecting

15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
16***79	Adapter	2
16***43	Seal	1

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177-1856 Lines Gp-Connecting

16***43	Seal	1
17***56	Lines Group-Connecting	1
17***05	Adapter As	2
17***50	Hose As	2

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202-9132 Lines Gp-Connecting

17***70	Hose As	2
20***32	Lines Group-Connecting	1
6V***16	Connector-Seal; (1- 5/16-12)	2
6V***46	Seal-O-Ring	4

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177-1855 Lines Gp-Connecting

16***43	Seal	1
17***55	Lines Group-Connecting	1
17***05	Adapter As	2
17***64	Hose As	2

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177-1858 Lines Gp-Connecting

17***58	Lines Group-Connecting	1
17***77	Hose As	2
6V***46	Seal-O-Ring	4
7M***85	Seal,Adapter,Motor Part Of Kit P/N 5r***29	2

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202-9133 Lines Gp-Connecting

14***48	Fitting As; (Quick Disconnect, Male)	1
14***49	Fitting As; (Quick Disconnect, Female)	1
17***57	Hose As	2
20***33	Lines Group-Connecting	1

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172-3411 Lines Gp-Connecting

15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
15***44	Seal	1
16***11	Adapter As	2

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171-2567 Lines Gp-Connecting

15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
17***67	Lines Group-Connecting	1
17***18	Hose As	2

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180-4006 Lines Gp-Connecting

15***96	Fitting As; (Quick Disconnect, Male)(Quick Disconnect)	1
15***97	Fitting As; (Quick Disconnect, Female)	1
15***44	Seal	1
16***11	Adapter As	2

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295-0274 Lines Gp-Connecting

10***01	Fitting; (Quick Disconnect, Female)	1
10***06	Fitting; (Quick Disconnect, Male)	1
29***74	Lines Group-Connecting	1
29***26	Hose As	2

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177-1865 Lines Gp-Connecting

17***65	Lines Group-Connecting	1
17***64	Hose As	2
17***88	Adapter As	2
6V***57	Seal-O-Ring (Id=29.74mm)	1

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203-0983 Lines Gp-Connecting

15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
18***95	Hose As	2
20***83	Lines Group-Connecting	1

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164-2430 Lines Gp-Connecting

15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
16***79	Adapter	2
16***30	Lines Group-Connecting	1

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157-7193 Lines Gp-Connecting

15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1
15***81	Hose As	2
15***44	Seal	1

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298-4057 Lines Gp-Connecting

29***57	Lines Group-Connecting	1
29***58	Hose As	2
5K***90	Seal-To Hydraulic Cooler Inlet Port	2
6V***57	Nut-Face Seal; (1-7/16-12-Thd)	2

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206-7692 Lines Gp-Connecting

10***01	Fitting; (Quick Disconnect, Female)	1
10***06	Fitting; (Quick Disconnect, Male)	1
12***71	Hose-Supply	1
12***72	Hose-Return	1

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203-1010 Lines Gp-Connecting

15***96	Fitting As; (Quick Disconnect, Male)(Quick Disconnect)	1
15***97	Fitting As; (Quick Disconnect, Female)	1
18***19	Hose As	2
20***10	Lines Group-Connecting	1

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127-9579 Lines Gp-Connecting

10***01	Fitting; (Quick Disconnect, Female)	1
10***06	Fitting; (Quick Disconnect, Male)	1
12***79	Lines Group-Hammer; -Custom	1
12***57	Hose-Supply	1

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127-9577 Lines Gp-Connecting

10***01	Fitting; (Quick Disconnect, Female)	1
10***06	Fitting; (Quick Disconnect, Male)	1
12***71	Hose-Supply	1
12***72	Hose-Return	1

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131-3160 Lines Gp-Connecting

13***60	Lines Group-Hammer; -Custom	1
13***61	Hose As	2
15***95	Adapter As	2
15***46	Seal	1

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131-2962 Lines Gp-Connecting

13***62	Lines Group-Hammer; -Custom	1
13***63	Hose As	2
15***95	Adapter As	2
15***46	Seal	1

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131-2882 Lines Gp-Connecting

13***82	Lines Group-Hammer; -Custom	1
13***83	Hose As	2
15***95	Adapter As	2
15***46	Seal	1

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131-2564 Lines Gp-Connecting

13***63	Hose As	2
13***64	Lines Group-Hammer; -Custom	1
15***95	Adapter As	2
15***46	Seal	1

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128-6724 Lines Gp-Connecting

10***01	Fitting; (Quick Disconnect, Female)	1
10***06	Fitting; (Quick Disconnect, Male)	1
12***57	Hose-Supply	1
12***59	Hose-Return	1

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152-5342 Lubrication Gp-Automatic

06***44	Grommet	1
10***82	Switch As-Pressure	1
12***90	Coupling-Permanent	1
12***13	Coupling-Permanent	5

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148-8098 Lubrication Gp-Automatic

10***03	Coupling	4
10***05	Connector	4
12***72	Hose; (1500-cm)	0
14***39	Pump Group-Lubrication	1

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152-3395 Lubrication Gp-Automatic

06***44	Grommet	1
10***79	Switch As-Pressure; (Implement/Swing & Travel)	1
12***90	Coupling-Permanent	1
12***13	Coupling-Permanent	5

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153-7532 Pump Gp-Lubrication

15***32	Pump Group-Lubrication	1
15***17	Valve As-Relief; (Grease Pressure)	1
15***19	Board-Circuit	1
15***20	Cover-Housing	1

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152-3402 Pump Gp-Lubrication

15***02	Pump Group-Lubrication	1
15***17	Valve As-Relief; (Grease Pressure)	1
15***19	Board-Circuit	1
15***20	Cover-Housing	1

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187-5291 Valve Gp-Control

09***22	Plug	2
10***60	Seal	1
15***92	Body-Valve	1
15***06	Spool-Valve	1

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187-5340 Valve Gp-Control

09***23	Plug	2
15***30	Body-Valve	1
15***44	Spool-Valve	1
15***53	Kit-Seal	1

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203-1016 Valve Gp-Control

10***60	Seal	1
15***06	Spool-Valve	1
15***15	Kit-Seal	1
20***15	Body Group-Valve	1

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203-0945 Valve Gp-Control

15***47	Spool-Valve	1
20***43	Body Group-Valve	1
20***45	Valve Group-Control	1
20***63	Plug	2

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187-7722 Valve Gp-Control

15***47	Spool-Valve	1
18***22	Valve Group-Control	1
3Q***06	Body-Valve	1
3Q***15	Housing-Spring	1

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187-7733 Valve Gp-Control

11***56	Body-Valve	1
11***83	Spool-Valve	1
11***12	Kit-Seal	1
15***82	Plug	2

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187-7735 Valve Gp-Control

09***29	Plug	2
15***28	Kit-Seal	1
15***10	Body-Valve	1
15***47	Spool-Valve	1

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203-1003 Valve Gp-Control

15***44	Spool-Valve	1
15***53	Kit-Seal	1
20***01	Body Group-Valve	1
20***03	Carrier, Valve Group-Control	1

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203-0928 Valve Gp-Control

15***28	Kit-Seal	1
15***47	Spool-Valve	1
20***26	Body Group-Valve	1
20***28	Valve Group-Control	1

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203-0907 Valve Gp-Control

11***83	Spool-Valve	1
11***12	Kit-Seal	1
20***06	Body Group-Valve	1
20***07	Valve Group-Control	1

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187-5343 Valve Gp-Control

09***23	Plug	2
10***45	Kit-Seal	1
10***48	Body-Valve	1
10***61	Spool-Valve	1

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203-0990 Valve Gp-Control

10***45	Kit-Seal	1
10***61	Spool-Valve	1
10***60	Seal	1
20***88	Body Group-Valve	1

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Service Equipment And Supplies

159-5924 Film Gp

14***69	Film-Warning; (Alert)	2
14***70	Film-Warning; (Read Omm)	2
15***56	Film-Warning; (Stay Back 26-Ft)	2
15***57	Film-Warning; (Flying Debris, Hearing Protn)	2

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159-5916 Film Gp

14***69	Film-Warning; (Alert)	2
14***70	Film-Warning; (Read Omm)	2
15***56	Film-Warning; (Stay Back 26-Ft)	2
15***57	Film-Warning; (Flying Debris, Hearing Protn)	2

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159-5915 Film Gp

15***52	Film-Warning; (Stay Back)	2
15***53	Film-Information; (Read Omm)	2
15***54	Film-Warning; (Alert)(Safety Alert)	2
15***57	Film-Warning; (Flying Debris, Hearing Protn)	2

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159-5926 Film Gp

15***52	Film-Warning; (Stay Back)	2
15***53	Film-Information; (Read Omm)	2
15***54	Film-Warning; (Alert)(Safety Alert)	2
15***55	Film-Warning; (Flying Debris, Hearing Protn)	2

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159-5913 Film Gp

15***52	Film-Warning; (Stay Back)	2
15***53	Film-Information; (Read Omm)	2
15***54	Film-Warning; (Alert)(Safety Alert)	2
15***55	Film-Warning; (Flying Debris, Hearing Protn)	2

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159-5925 Film Gp

15***52	Film-Warning; (Stay Back)	2
15***53	Film-Information; (Read Omm)	2
15***54	Film-Warning; (Alert)(Safety Alert)	2
15***55	Film-Warning; (Flying Debris, Hearing Protn)	2

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159-5912 Film Gp

15***52	Film-Warning; (Stay Back)	2
15***53	Film-Information; (Read Omm)	2
15***54	Film-Warning; (Alert)(Safety Alert)	2
15***55	Film-Warning; (Flying Debris, Hearing Protn)	2

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121-9538 Film Gp

10***55	Plate-Warning	0
12***38	Film Group	1
13***42	Film; (63)	0
3Q***78	Film-Warning	0

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121-7510 Film Gp

10***55	Plate-Warning	2
12***10	Film Group	1
3Q***78	Film-Warning	2
3Q***79	Plate-Warning	2

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159-5914 Film Gp

15***52	Film-Warning; (Stay Back)	2
15***53	Film-Information; (Read Omm)	2
15***54	Film-Warning; (Alert)(Safety Alert)	2
15***55	Film-Warning; (Flying Debris, Hearing Protn)	2

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159-5910 Film Gp

15***52	Film-Warning; (Stay Back)	2
15***53	Film-Information; (Read Omm)	2
15***54	Film-Warning; (Alert)(Safety Alert)	2
15***55	Film-Warning; (Flying Debris, Hearing Protn)	2

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159-5919 Film Gp

14***69	Film-Warning; (Alert)	2
14***70	Film-Warning; (Read Omm)	2
15***56	Film-Warning; (Stay Back 26-Ft)	2
15***57	Film-Warning; (Flying Debris, Hearing Protn)	2

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159-5923 Film Gp

14***69	Film-Warning; (Alert)	2
14***70	Film-Warning; (Read Omm)	2
15***56	Film-Warning; (Stay Back 26-Ft)	2
15***57	Film-Warning; (Flying Debris, Hearing Protn)	2

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159-5911 Film Gp

15***52	Film-Warning; (Stay Back)	2
15***53	Film-Information; (Read Omm)	2
15***54	Film-Warning; (Alert)(Safety Alert)	2
15***55	Film-Warning; (Flying Debris, Hearing Protn)	2

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Work Tool Arrangement

213-9664chart-Hammer Ar -Small Hammers

21***64

Chart-Hammer Ar; -Small Hammers

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213-9665 Chart-Hammer Ar -Merchandising

21***65

Chart-Hammer Ar; -Merchandising

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203-1046 Hammer Ar-Hydraulic

15***42	Plate Group-Hammer	1
15***23	Film Group	1
20***29	Hammer Group-Hydraulic	1
20***46	Block, Hammer Ar-Hydraulic	1

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131-1000 Hammer Ar-Hydraulic

12***15	Tool Group; (For European Use Only)	1
13***99	Hammer Ar-Hydraulic	1
13***00	Hammer Ar-Hydraulic	1

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203-1047 Hammer Ar-Hydraulic

12***14	Tool Group; (European Source Only)	1
20***46	Block, Hammer Ar-Hydraulic	1
20***47	Hammer Ar-Hydraulic, Block	1

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131-0999 Hammer Ar-Hydraulic

12***59	Hammer Group-Hydraulic	1
13***99	Hammer Ar-Hydraulic	1
13***14	Plate Group-Hammer	1
15***25	Film Group	1

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203-0951 Hammer Ar-Hydraulic

13***94	Plate Group-Hammer	1
15***16	Film Group	1
20***46	Hammer Group-Hydraulic	1
20***51	Hammer Ar-Hydraulic	1

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161-3503 Hammer Ar-Hydraulic

12***14	Tool Group; (European Source Only)	1
15***55	Hammer Ar-Hydraulic	1
16***03	Hammer Ar-Hydraulic	1

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203-1006 Hammer Ar-Hydraulic

15***16	Plate Group-Hammer	1
15***13	Film Group	1
20***04	Hammer Group-Hydraulic	1
20***06	Hammer Ar-Hydraulic	1

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203-0950 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
20***49	Hammer Ar-Hydraulic	1
20***50	Hammer Ar-Hydraulic	1

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161-3502 Hammer Ar-Hydraulic

12***14	Tool Group; (European Source Only)	1
15***43	Hammer Ar-Hydraulic	1
16***02	Hammer Ar-Hydraulic	1

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203-0913 Hammer Ar-Hydraulic

13***14	Plate Group-Hammer	1
15***25	Film Group	1
20***09	Hammer Group-Hydraulic	1
20***13	Hammer Ar-Hydraulic	1

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158-4538 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
15***29	Hammer Ar-Hydraulic	1
15***38	Hammer Ar-Hydraulic	1

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203-0930 Hammer Ar-Hydraulic

15***41	Plate Group-Hammer	1
15***23	Film Group	1
20***29	Hammer Group-Hydraulic	1
20***30	Hammer Ar-Hydraulic	1

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203-0942 Hammer Ar-Hydraulic

12***14	Tool Group; (European Source Only)	1
20***41	Hammer Ar-Hydraulic	1
20***42	Hammer Ar-Hydraulic	1

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124-4708 Hammer Ar-Hydraulic

12***07	Hammer Ar-Hydraulic	1
12***08	Hammer Ar-Hydraulic	1
12***15	Tool Group; (For European Use Only)	1

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194-6508 Hammer Ar-Hydraulic

12***14	Tool Group; (European Source Only)	1
19***07	Hammer Ar-Hydraulic	1
19***08	Hammer Ar-Hydraulic	1

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203-0947 Hammer Ar-Hydraulic

10***21	Plate Group-Hammer	1
15***16	Film Group	1
20***46	Hammer Group-Hydraulic	1
20***47	Cover, Hammer Ar-Hydraulic	1

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203-0986 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
20***86	Hammer Ar-Hydraulic	1
20***97	.. Axle, Hammer Ar-Hydraulic, Axle; (Sub For At201657), . Axle	1

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203-0911 Hammer Ar-Hydraulic

12***15	Tool Group; (For European Use Only)	1
20***10	Hammer Ar-Hydraulic	1
20***11	Hammer Ar-Hydraulic	1

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203-0924 Hammer Ar-Hydraulic

13***38	Plate Group-Hammer	1
15***26	Film Group	1
20***09	Hammer Group-Hydraulic	1
20***24	Hammer Ar-Hydraulic	1

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203-0979 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
20***79	Hammer Ar-Hydraulic	1
20***95	Hammer Ar-Hydraulic	1

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203-1020 Hammer Ar-Hydraulic

15***65	Plate Group-Hammer	1
15***10	Film Group	1
20***18	Hammer Group-Hydraulic	1
20***20	Hammer Ar-Hydraulic	1

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203-0934 Hammer Ar-Hydraulic

12***14	Tool Group; (European Source Only)	1
20***33	Hammer Ar-Hydraulic	1
20***34	Hammer Ar-Hydraulic	1

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158-4543 Hammer Ar-Hydraulic

15***43	Hammer Ar-Hydraulic	1
15***44	Plate Group-Hammer	1
15***19	Film Group	1
3Q***01	Hammer Group-Hydraulic	1

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112-4842 Hammer Ar-Hydraulic

11***42	Hammer Ar-Hydraulic	1
12***47	Hammer Ar-Hydraulic	1
12***15	Tool Group; (For European Use Only)	1

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157-2243 Hammer Ar-Hydraulic

15***40	Hammer Group-Hydraulic	1
15***42	Plate Group-Hammer	1
15***43	Hammer Ar-Hydraulic	1
15***23	Film Group	1

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191-9802 Hammer Ar-Hydraulic

15***16	Film Group	1
19***01	Plate Group-Hammer	1
19***02	Hammer Ar-Hydraulic	1
3Q***01	Hammer Group-Hydraulic	1

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203-0952 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
20***51	Hammer Ar-Hydraulic	1
20***52	Hammer Ar-Hydraulic	1

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203-0915 Hammer Ar-Hydraulic

12***15	Tool Group; (For European Use Only)	1
20***13	Hammer Ar-Hydraulic	1
20***15	Hammer Ar-Hydraulic	1

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203-1000 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
20***00	Hammer Ar-Hydraulic, .. Cyl.	1
20***06	Hammer Ar-Hydraulic	1

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203-0941 Hammer Ar-Hydraulic

15***08	Plate Group-Hammer	1
15***24	Film Group	1
20***29	Hammer Group-Hydraulic	1
20***41	Hammer Ar-Hydraulic	1

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203-0974 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
20***72	Hammer Ar-Hydraulic	1
20***74	Hammer Ar-Hydraulic	1

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152-2527 Hammer Ar-Hydraulic

15***24	Plate Group-Hammer	1
15***27	Hammer Ar-Hydraulic	1
15***28	Hammer Group-Hydraulic	1
15***12	Film Group	1

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157-2655 Hammer Ar-Hydraulic

15***08	Plate Group-Hammer	1
15***40	Hammer Group-Hydraulic	1
15***55	Hammer Ar-Hydraulic	1
15***24	Film Group	1

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112-8203 Hammer Ar-Hydraulic

11***03	Hammer Ar-Hydraulic	1
12***38	Film Group	1
12***39	Plate Group-Hammer	1
7Q***13	Hammer Group-Hydraulic	1

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130-3801 Hammer Ar-Hydraulic

13***94	Plate Group-Hammer	1
13***01	Hammer Ar-Hydraulic	1
15***16	Film Group	1
3Q***01	Hammer Group-Hydraulic	1

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203-0933 Hammer Ar-Hydraulic

15***23	Film Group	1
19***06	Plate Group-Hammer	1
20***29	Hammer Group-Hydraulic	1
20***33	Hammer Ar-Hydraulic	1

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105-4336 Hammer Ar-Hydraulic

10***36	Hammer Ar-Hydraulic	1
10***21	Plate Group-Hammer	1
15***16	Film Group	1
3Q***01	Hammer Group-Hydraulic	1

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203-0948 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
20***47	Cover, Hammer Ar-Hydraulic	1
20***48	Hammer Ar-Hydraulic, Cover	1

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203-0976 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
20***75	Hammer Ar-Hydraulic	1
20***76	Hammer Ar-Hydraulic	1

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120-5947 Hammer Ar-Hydraulic

11***43	Plate Group-Hammer	1
12***47	Hammer Ar-Hydraulic	1
12***59	Hammer Group-Hydraulic	1

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153-9929 Hammer Ar-Hydraulic

15***29	Hammer Ar-Hydraulic	1
15***40	Plate Group-Hammer	1
15***14	Film Group	1
7Q***13	Hammer Group-Hydraulic	1

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138-1136 Hammer Ar-Hydraulic

12***15	Tool Group; (For European Use Only)	1
13***36	Hammer Ar-Hydraulic	1
13***37	Hammer Ar-Hydraulic	1

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124-9640 Hammer Ar-Hydraulic

12***40	Hammer Ar-Hydraulic	1
12***41	Hammer Ar-Hydraulic	1
12***12	Tool Group; (For European Use Only)	1

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118-5577 Hammer Ar-Hydraulic

11***77	Hammer Ar-Hydraulic	1
12***10	Film Group	1
12***16	Plate Group-Hammer	1
14***05	Adapter As	2

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154-2903 Hammer Ar-Hydraulic

15***16	Plate Group-Hammer	1
15***28	Hammer Group-Hydraulic	1
15***03	Hammer Ar-Hydraulic	1
15***13	Film Group	1

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203-0925 Hammer Ar-Hydraulic

12***15	Tool Group; (For European Use Only)	1
20***24	Hammer Ar-Hydraulic	1
20***25	Hammer Ar-Hydraulic	1

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203-0997 Hammer Ar-Hydraulic

15***42	Plate Group-Hammer	1
15***15	Film Group	1
20***94	Hammer Group-Hydraulic	1
20***97	.. Axle, Hammer Ar-Hydraulic, Axle; (Sub For At201657), . Axle	1

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203-1009 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
20***09	Hammer Ar-Hydraulic	1
20***20	Hammer Ar-Hydraulic	1

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154-2902 Hammer Ar-Hydraulic

15***62	Hammer Group-Hydraulic	1
15***63	Plate Group-Hammer	1
15***02	Hammer Ar-Hydraulic	1
15***11	Film Group	1

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159-1611 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
15***43	Hammer Ar-Hydraulic	1
15***11	Hammer Ar-Hydraulic	1

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203-0949 Hammer Ar-Hydraulic

15***16	Film Group	1
19***01	Plate Group-Hammer	1
20***46	Hammer Group-Hydraulic	1
20***49	Hammer Ar-Hydraulic	1

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127-5546 Hammer Ar-Hydraulic

12***38	Film Group	1
12***46	Hammer Ar-Hydraulic	1
3D***24	O-Ring - For Oil Drain & Level Plug (Items 3 & 7)	2
5K***90	Seal-To Hydraulic Cooler Inlet Port	2

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161-3498 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
15***02	Hammer Ar-Hydraulic	1
16***98	Hammer Ar-Hydraulic	1

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124-4707 Hammer Ar-Hydraulic

12***59	Hammer Group-Hydraulic	1
12***06	Plate Group-Hammer	1
12***07	Hammer Ar-Hydraulic	1
15***25	Film Group	1

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124-9641 Hammer Ar-Hydraulic

12***41	Hammer Ar-Hydraulic	1
12***42	Plate Group-Hammer	1
15***19	Film Group	1
3Q***01	Hammer Group-Hydraulic	1

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158-4541 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
15***27	Hammer Ar-Hydraulic	1
15***41	Hammer Ar-Hydraulic	1

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171-1374 Hammer Ar-Hydraulic

15***16	Film Group	1
17***74	Hammer Ar-Hydraulic	1
17***75	Plate Group-Hammer	1
3Q***01	Hammer Group-Hydraulic	1

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161-3501 Hammer Ar-Hydraulic

12***14	Tool Group; (European Source Only)	1
15***25	Hammer Ar-Hydraulic	1
16***01	Hammer Ar-Hydraulic	1

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138-1137 Hammer Ar-Hydraulic

12***59	Hammer Group-Hydraulic	1
13***37	Hammer Ar-Hydraulic	1
13***38	Plate Group-Hammer	1
15***26	Film Group	1

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150-8825 Hammer Ar-Hydraulic

15***25	Hammer Ar-Hydraulic	1
15***40	Hammer Group-Hydraulic	1
15***41	Plate Group-Hammer	1
15***23	Film Group	1

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161-3499 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
15***27	Hammer Ar-Hydraulic	1
16***99	Hammer Ar-Hydraulic	1

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171-1373 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
17***73	Hammer Ar-Hydraulic	1
17***74	Hammer Ar-Hydraulic	1

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203-0999 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
20***99	Hammer Ar-Hydraulic	1
20***05	Hammer Ar-Hydraulic	1

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194-6507 Hammer Ar-Hydraulic

15***40	Hammer Group-Hydraulic	1
15***23	Film Group	1
19***06	Plate Group-Hammer	1
19***07	Hammer Ar-Hydraulic	1

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130-3802 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
13***01	Hammer Ar-Hydraulic	1
13***02	Hammer Ar-Hydraulic	1

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203-0975 Hammer Ar-Hydraulic

15***44	Plate Group-Hammer	1
15***19	Film Group	1
20***46	Hammer Group-Hydraulic	1
20***75	Hammer Ar-Hydraulic	1

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203-1005 Hammer Ar-Hydraulic

15***24	Plate Group-Hammer	1
15***12	Film Group	1
20***04	Hammer Group-Hydraulic	1
20***05	Hammer Ar-Hydraulic	1

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203-1021 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
20***21	Hammer Ar-Hydraulic	1
20***26	Hammer Ar-Hydraulic	1

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109-0730 Hammer Ar-Hydraulic

10***36	Hammer Ar-Hydraulic	1
10***30	Hammer Ar-Hydraulic	1
12***12	Tool Group; (For European Use Only)	1

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203-1026 Hammer Ar-Hydraulic

15***63	Plate Group-Hammer	1
15***11	Film Group	1
20***18	Hammer Group-Hydraulic	1
20***26	Hammer Ar-Hydraulic	1

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153-9927 Hammer Ar-Hydraulic

15***27	Hammer Ar-Hydraulic	1
15***42	Plate Group-Hammer	1
15***15	Film Group	1
7Q***13	Hammer Group-Hydraulic	1

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161-3500 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
15***03	Hammer Ar-Hydraulic	1
16***00	Hammer Ar-Hydraulic	1

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191-9803 Hammer Ar-Hydraulic

12***12	Tool Group; (For European Use Only)	1
19***02	Hammer Ar-Hydraulic	1
19***03	Hammer Ar-Hydraulic	1

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203-0931 Hammer Ar-Hydraulic

12***14	Tool Group; (European Source Only)	1
20***30	Hammer Ar-Hydraulic	1
20***31	Hammer Ar-Hydraulic	1

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203-0910 Hammer Ar-Hydraulic

12***06	Plate Group-Hammer	1
15***25	Film Group	1
20***09	Hammer Group-Hydraulic	1
20***10	Hammer Ar-Hydraulic	1

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203-0972 Hammer Ar-Hydraulic

15***16	Film Group	1
17***75	Plate Group-Hammer	1
20***46	Hammer Group-Hydraulic	1
20***72	Hammer Ar-Hydraulic	1

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203-0995 Hammer Ar-Hydraulic

15***40	Plate Group-Hammer	1
15***14	Film Group	1
20***94	Hammer Group-Hydraulic	1
20***95	Hammer Ar-Hydraulic	1

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Work Tools

215-6527 Bracket Gp-Mounting

21***26	Bracket As	1
21***27	Bracket Group-Mounting	1
21***65	Shim	6
21***66	Shim	8

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290-0333 Bracket Gp-Mounting

29***33	Bracket Group-Mounting	1
29***34	Bracket As	1
29***18	Rivet	4
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	8

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204-3379 Bracket Gp-Mounting

09***96	Bolt; (M20x2.5-Thd)	4
20***79	Bracket Group-Mounting	1
20***13	Bracket As	1
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	2

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305-0511 Bracket Gp-Mounting

30***11	Bracket Group-Mounting	1
30***12	Bracket As	1
7X***54	Bolt; (M16x2x70-mm)	12
7X***64	Bolt; (M20x2.5x90-mm)	8

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209-3306 Bracket Gp-Mounting

20***05	Bracket As	1
20***06	Bracket Group-Mounting	1
7X***54	Bolt; (M16x2x70-mm)	12
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	16

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230-9508 Bracket Gp-Mounting

23***08	Bracket Group-Mounting	1
26***35	Bracket As	1
8T***93	Bolt-Plt; (M16 X 2.0 X 50)	12
9X***57	Washer-Pipe As To Main Pump Suction Port	12

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230-9505 Bracket Gp-Mounting

23***05	Bracket Group-Mounting	1
26***37	Bracket As	1
8T***39	Washer; (6.0mm Thk)(M21.5x6x45mm)	4
8T***30	Capscrew; (Use 12-16) (Hex Hd) (M20x2.5x50) (Gd 10.9 Z)	4

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308-7541 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
30***41	Bracket Group-Mounting	1
30***42	Bracket As	1
7X***64	Bolt; (M20x2.5x90-mm)	8

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318-2265 Bracket Gp-Mounting

31***64	Bracket As	1
31***65	Bracket Group-Mounting	1
7X***54	Bolt; (M16x2x70-mm)	12
7X***64	Bolt; (M20x2.5x90-mm)	8

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305-4984 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
30***84	Bracket Group-Mounting	1
30***85	Bracket As	1
7X***54	Bolt; (M16x2x70-mm)	12

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280-9827 Bracket Gp-Mounting

28***27	Bracket Group-Mounting	1
28***28	Bracket As	1
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	16
8T***31	Nut; (M20x2.5-Thd)	8

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226-2797 Bracket Gp-Mounting

22***97	Bracket Group-Mounting	1
22***96	Bracket As	1
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	16
8T***31	Nut; (M20x2.5-Thd)	8

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280-9885 Bracket Gp-Mounting

28***85	Bracket Group-Mounting	1
28***86	Bracket As-Mounting	1
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	16
8T***31	Nut; (M20x2.5-Thd)	8

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222-4850 Bracket Gp-Mounting

22***50	Bracket Group-Mounting	1
22***66	Bracket As	1
7X***54	Bolt; (M16x2x70-mm)	12
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	16

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222-7794 Bracket Gp-Mounting

22***94	Bracket Group-Mounting	1
22***98	Bracket As	1
7X***54	Bolt; (M16x2x70-mm)	8
8T***32	Nut (M16 X 2 Thd); (M16x2.00 Thd)	8

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3q-7608 Bracket Gp-Mounting

16***56	Bracket As	1
3Q***08	Bracket Group-Mounting	1
7X***54	Bolt; (M16x2x70-mm)	12
7X***64	Bolt; (M20x2.5x90-mm)	8

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333-0098 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
33***98	Bracket Group-Mounting	1
33***99	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10

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219-0667 Bracket Gp-Mounting

21***67	Bracket Group-Mounting	1
21***68	Bracket As	1
7X***54	Bolt; (M16x2x70-mm)	12
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	16

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179-9859 Bracket Gp-Mounting

17***59	Bracket Group-Mounting	1
17***72	Bracket As	1
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	16
8T***31	Nut; (M20x2.5-Thd)	8

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230-9507 Bracket Gp-Mounting

23***07	Bracket Group-Mounting	1
26***36	Bracket As	1
8T***39	Washer; (6.0mm Thk)(M21.5x6x45mm)	4
8T***30	Capscrew; (Use 12-16) (Hex Hd) (M20x2.5x50) (Gd 10.9 Z)	4

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300-5047 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
30***47	Bracket Group-Mounting	1
30***48	Bracket As	1
7X***54	Bolt; (M16x2x70-mm)	12

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230-9504 Bracket Gp-Mounting

23***04	Bracket Group-Mounting	1
26***38	Bracket As	1
8T***31	Nut; (M20x2.5-Thd)	4
8T***87	Bolt; (M20x2.5x80-mm)	4

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294-7877 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
29***77	Bracket Group-Mounting	1
29***78	Bracket As	1
7X***54	Bolt; (M16x2x70-mm)	12

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294-7874 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
29***74	Bracket Group-Mounting	1
29***76	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	8

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155-4468 Bracket Gp-Mounting

15***68	Bracket Group-Mounting	1
15***77	Bracket As	1
8T***31	Nut; (M20x2.5-Thd)	4
8T***87	Bolt; (M20x2.5x80-mm)	4

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215-6525 Bracket Gp-Mounting

21***24	Bracket As	1
21***25	Bracket Group-Mounting	1
21***25	Shim; (0.5-mm Thk)	6
21***26	Shim; (0.1-mm Thk)	6

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191-0991 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
19***91	Bracket Group-Mounting	1
20***54	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10

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230-9503 Bracket Gp-Mounting

23***03	Bracket Group-Mounting	1
26***39	Bracket As	1
8T***39	Washer; (6.0mm Thk)(M21.5x6x45mm)	4
8T***30	Capscrew; (Use 12-16) (Hex Hd) (M20x2.5x50) (Gd 10.9 Z)	4

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189-2978 Chart-Hammer Tool

10***35	Tool-Moil Point	1
10***36	Tool-Chisel	1
12***56	Tool-Blunt	1
12***91	Tool-Long Chisel	1

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189-2980 Chart-Hammer Tool

12***44	Tool-Long Chisel	1
12***46	Tool-Moil Point	1
15***16	Shaft	1
18***80	Chart-Hammer Tool	1

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189-2981 Chart-Hammer Tool

12***30	Tool-Compacting Plate	1
12***94	Tool-Long Chisel	1
12***98	Tool-Long Moil Point	1
15***61	Shaft	1

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189-2983 Chart-Hammer Tool

15***89	Tool-Chisel	1
15***90	Tool-Moil Point	1
15***93	Tool-Compacting Plate	1
18***83	Chart-Hammer Tool	1

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189-2979 Chart-Hammer Tool

15***26	Tool-Moil Point	1
15***27	Tool-Chisel	1
18***03	Tool-Long Chisel	1
18***05	Tool-Long Moil Point	1

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189-2982 Chart-Hammer Tool

15***94	Tool-Chisel	1
15***95	Tool-Moil Point	1
15***98	Tool-Compacting Plate	1
15***59	Shaft	1

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191-4885 Chart-Mounting Bracket

09***85	Locknut; (M16x2-Thd)	12
10***43	Adjuster Group-Bucket	1
10***57	Adjuster Group-Bucket; (Bucket)	1
12***38	Mounting Group-Hammer; -Custom	1

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190-1444 Chart-Mounting Bracket

12***43	Bracket Group-Mounting	1
12***44	Bracket As	1
12***45	Bracket Group-Mounting	1
12***46	Bracket As	1

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203-0929 Hammer Gp-Hydraulic

11***82	Plate	1
15***28	Kit-Seal	1
15***29	Bushing As	1
15***14	Cylinder	1

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120-7259 Hammer Gp-Hydraulic

10***46	Plug	1
11***56	Body-Valve	1
11***57	Cylinder	1
11***58	Piston	1

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203-1004 Hammer Gp-Hydraulic

09***73	Bolt; (Socket Head) (M12x1.75x60mm)	4
09***05	Bolt-Socket Head; (M16x2x100-mm)	8
10***60	Washer	4
10***43	Nut-Tie Rod	4

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152-0962 Hammer Gp-Hydraulic

10***46	Plug	2
14***14	Seal-U-Cup	1
15***62	Hammer Group-Hydraulic	1
15***90	Seal-Wiper	1

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157-2240 Hammer Gp-Hydraulic

11***82	Plate	1
15***28	Kit-Seal	1
15***29	Bushing As	1
15***14	Cylinder	1

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203-0946 Hammer Gp-Hydraulic

11***22	Seal	1
20***22	Head Group-Front	1
20***45	Valve Group-Control	1
20***46	Hammer Group-Hydraulic	1

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203-0909 Hammer Gp-Hydraulic

11***57	Cylinder	1
11***58	Piston	1
11***60	Bushing	1
11***62	Pin-Tool Retainer	2

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203-0994 Hammer Gp-Hydraulic

09***05	Bolt-Socket Head; (M16x2x100-mm)	8
09***06	Bolt-Socket Head; (M16x2x80-mm)	4
10***60	Washer	4
10***34	Cylinder	1

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3q-7301 Hammer Gp-Hydraulic

11***22	Seal	1
3E***05	Washer; (31x56x0.5-mm Thk)	4
3E***24	Lockwasher	56
3E***02	Seal-O-Ring; (104.5mm Id)	2

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152-2528 Hammer Gp-Hydraulic

09***73	Bolt; (Socket Head) (M12x1.75x60mm)	4
09***05	Bolt-Socket Head; (M16x2x100-mm)	8
10***60	Washer	4
10***43	Nut-Tie Rod	4

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7q-8913 Hammer Gp-Hydraulic

09***05	Bolt-Socket Head; (M16x2x100-mm)	8
09***06	Bolt-Socket Head; (M16x2x80-mm)	8
10***60	Washer	4
10***34	Cylinder	1

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203-1018 Hammer Gp-Hydraulic

10***46	Plug	2
14***14	Seal-U-Cup	1
15***90	Seal-Wiper	1
15***91	Seal	1

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H90C serial number reference

The ID plate on an H90C sits on the tool's back head (top cylinder housing) or on the mounting bracket, stamped with the model designation and full serial number. Read the first three characters as the plant/model prefix (e.g. 6TZ) and the remaining digits as the unit's sequence number within that prefix run. Match the prefix against known H90C ranges before ordering parts, since the same digit sequence after the prefix can belong to a different Cat product entirely.

Prefix	Identifies	Notes
6TZ	H90C hydraulic hammer (C-series hammer line), sized for the 7-10 t carrier class. Fits compact/mini excavators (such as 307D, 308D CR, 311D, 312D) and E-series backhoe loaders.	Only prefix documented against this exact model across dealer used-unit listings and parts/service manual catalogs, spanning at least 2011-2012 build units. The tool has no engine of its own - it runs off the carrier's hydraulic circuit, so there is no separate engine serial to track. Plant/region code for this prefix is not published. Treat any other prefix as unconfirmed and check with a dealer before ordering parts.

Frequently asked questions

What engine does the Caterpillar H90C use?

None. The H90C is a hydraulic hammer/breaker work tool, not a self-propelled machine, so it carries no engine, transmission, or ECM of its own. It runs entirely on hydraulic flow and pressure supplied by the host excavator or backhoe loader's auxiliary circuit, rated at roughly 60-150 L/min (16-40 gal/min) at about 135 bar (1,958 psi).

What is the H90C's operating weight?

Operating weight varies by configuration: about 547 kg (1,206 lb) for the pin-on setup, 590 kg (1,300 lb) for the standard flat-top bracket, and 600 kg (1,320 lb) for the sound-suppressed flat-top (H90C S). It is sized for host carriers in roughly the 7-12 tonne class.

What replaced the Caterpillar H90C?

No confirmed successor model has surfaced in research to date. The H90C was catalogued alongside the H70, H70 S, and the sound-suppressed H90C S as part of the same hydraulic-hammer family; treat any claimed direct replacement as unconfirmed until current Cat catalog or dealer documentation states it explicitly.

What H90C owners discuss

How much hydraulic flow and pressure does the H90C need from the carrier, and what happens if the machine doesn't match it?

The H90C is built for the 7 to 12 tonne excavator and compact backhoe-loader class. Rated flow runs roughly 60-150 L/min (16-39 GPM) with working pressure around 135 bar (1,958 psi), though the exact window shifts a bit with carrier valve setup and hose routing - treat published figures as a range, not an exact cutoff. Feed it too much flow or pressure and the tool overspeeds: seals cook, the piston runs hotter than the oil can carry away, and seal and bushing wear accelerate. Starve it and blow frequency drops, the tool struggles to break material, and operators tend to lean on the carrier harder to compensate - which wears pins and bushings faster without actually improving production. Set the carrier's auxiliary circuit to the hammer's own spec, not to whatever flow happens to be available.

What quirks do owners run into with the H90C's plumbing and control valve compared to other hammer brands?

A recurring one: the pressure and return ports on the H90C sit opposite where several other hammer brands put them - pressure on one side, return on the other, backwards from what a lot of installers expect. Someone used to a different brand's layout can cross the lines on a rebuild or when moving the hammer to a different carrier without noticing right away, because the tool still cycles - just running the circuit in reverse - until someone traces it out. On machines fitted with a hammer/thumb selector valve, a valve that sticks or is plumbed in the wrong position shows up as the tool only firing with the selector lever in what feels like the wrong spot. Neither is a defect in the hammer itself - it's a mismatch between the hammer's factory port convention and whatever a carrier or a previous installer set up. Check port orientation against the hammer's own tag before assuming a fault.

What wear pattern shows up first at the tool end, and how do people check it in the field?

Almost every complaint on this class of hammer traces back to the same spot: the lower bushing and the tool/retaining pins. The lower bushing carries the brunt of side load from prying and angled work, and once it wears oversize it lets the tool rock front-to-back. That rocking knocks the piston out of alignment with the tool shank, and the piston starts contacting the cylinder bore on the way down - which is how a cheap bushing job turns into an expensive bore-scoring repair. Field check is simple: pull the retaining pin, feel for front-to-back play in the tool against the bushing, and see if a flat bar or gauge pin seats where it shouldn't. Owners who stay ahead of it check tool and pin condition on a set interval and rotate the retaining pins so they wear evenly instead of grooving on one side only.

The H90C has no ECM or sensors of its own - so what do people actually mean by "electrical" or "control" problems on it?

Nothing on the hammer itself is electrical. It's a passive hydraulic tool with no wiring, no controller, and nothing to fault-code - all of that lives on the carrier. What owners mean when they mention a control problem is the carrier's auxiliary valve section, the in-cab hammer/bucket selector switch, or a diverter valve that routes flow between the hammer circuit and a thumb or other tool. When that selector sticks or its linkage or solenoid on the carrier's valve bank is out of adjustment, it can look exactly like "the hammer isn't getting flow" when the real fault sits upstream in the carrier's own hydraulics, not in the tool.

What does the nitrogen accumulator actually do on the H90C, and what happens if the precharge is wrong?

The accumulator's nitrogen charge cushions pressure spikes from every blow and helps store energy between strokes, which is what gives the hammer its blow rate and efficiency. Charge it too low and it can't absorb those spikes - the hammer hits softer, the operator leans on it harder to compensate, and the unabsorbed spikes get passed back into the carrier's own hydraulic system. Charge it too high and the piston can't fully stroke against the gas pressure, which stops it firing on the return stroke - what techs call blank-firing - and it beats itself apart internally with only the tool and material absorbing the impact. Charging with anything other than dry nitrogen, especially shop air, is a real safety issue: oil mist and compressed air under heat and pressure inside the accumulator can ignite. Have your dealer verify accumulator precharge with a calibrated gauge rather than judging it by sound or feel.

Does mounting style affect wear - top bracket versus a side or offset bracket?

Yes, and it's a known pattern across this whole size class of hammer, not unique to the H90C. A top-mount (in-line) bracket keeps the hammer's impact force lined up with the stick, so recoil travels straight back through the mounting pins with minimal bending moment - less stress on the bracket welds and on the stick/boom pins. A side or offset-mount bracket puts the hammer's centerline off to one side of the stick, which creates a twisting load on every blow. Over time that shows up as bracket weld cracking and faster pin and bushing wear at the stick end than a top-mount setup sees. If a used H90C is on an offset bracket, check the bracket welds and stick-end pins more closely than you would on a top-mount unit.

What should you check before buying a used H90C?

Work from the tool end back. Pull the retaining pin and check the lower bushing for play against the tool shank - that's the single wear point that predicts most of what else is wrong. Look at the tool shank collar for mushrooming or cracking. Check the accumulator - a shop with a nitrogen gauge can verify precharge in a few minutes, and a soft or dead accumulator is a near-term cost even on a hammer that fires fine on the lot. Inspect the housing and bracket welds for cracking, particularly around the mounting ears and the bracket junction. Check the front head and side bolt area for weeping - oil residue mixed with grease there usually means the through-bolts have loosened and the head has shifted, which is worse than a plain seal leak. Ask about hour history and whether it spent its life on rock or demolition work (harder on bushings) versus lighter prying, and get maintenance records if they exist. None of this shows up on a walk-around - budget the time to actually pull the pin and check the bushing before committing.

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.

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