Caterpillarwork toolhammer

Caterpillar H140CS

Maintenance schedule, common problems & OEM parts breakdown

The Cat H140Cs is a boom-mounted hydraulic hammer (breaker) in Caterpillar's H-series line, built with the C-box sound-suppressed housing. It's sized for excavator carriers in roughly the 25,000-40,000 kg (55,000-88,000 lb) operating-weight class, with some parts listings citing a maximum carrier weight near 42,000 kg (92,600 lb), putting it around Cat 325-330 size excavators. The hammer itself weighs about 2,350-2,355 kg (5,170-5,182 lb), carries a 140 mm (5.49 in) tool shank, and runs about 2,639 mm (103.9 in) from top plate to tool tip. It has no engine of its own; it draws hydraulic power entirely from the host excavator's auxiliary circuit, at roughly 160 bar (2,320 psi) working pressure and 160-230 L/min (42-60 gpm) flow, for an impact rate of 350-600 blows per minute. Caterpillar cataloged it under the BED serial-prefix block alongside the same-size H160Cs hammer, built roughly from the mid-to-late 1990s into the early 2000s, and offered it with pin-on, pin-grabber, and pin-lock quick-coupler bracket options to fit different carrier stick configurations.

Caterpillar retired the C-box H140Cs in favor of the D-box H140DS (BXB serial prefix), which carries the same core hammer size, tool line, and carrier class into a different housing style. The line has since moved on again to the current H140 S Performance Hammer and H140 GC S silenced generations, which add factory auto-lubrication and updated sound suppression as standard features not confirmed on this earlier CS generation. In today's used and parts market the H140Cs still matters because plenty of these hammers remain in service on older 320-330-class excavators, and its bushings, seals, and tools are wear items that need regular replacement no matter how old the hammer is. Because Cat reused a similar size footprint across the CS, DS, and S generations, buyers and parts counters need the serial prefix, not just the model number, to pull the right bushing or seal kit for a given 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 H140CS specifications

Weights

Working (operating) weight	2,350–2,355 kg (5,170–5,182 lb)
Recommended carrier operating weight	25,000–40,000 kg (55,000–88,000 lb); one dealer parts listing gives up to 42,000 kg (92,600 lb) maximum

Dimensions

Tool (moil/chisel) shaft diameter	140 mm (5.49 in)
Overall length, top plate to tool tip	2,639 mm (103.9 in)
Mounting / box style	C-box, sound-suppressed housing; same core hammer also offered in D-box as the H140DS

Performance

Impact rate	350–600 bpm
Operating (working) pressure	160 bar / 16,000 kPa (2,320 psi)
Hydraulic flow requirement	160–230 L/min (42–60 gpm)
Energy class	6,800–7,500 J (5,000–5,500 ft-lb); figure varies by source/series

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

H140CS fluids & capacities

System	Capacity	Recommended fluid
Tool bushing / hammer grease points	1 grease fitting per hammer; apply 10-15 strokes of the grease gun per application, aimed at the tool bushings and the hammer tool. Some units in this hammer line offer an optional automatic lubrication cartridge for continuous greasing in place of manual application.	Cat Hydraulic Hammer Paste (copper/graphite-based). Rated for the high heat generated at the tool-bushing interface; do not substitute a standard chassis grease, as it breaks down under hammer operating temperatures and accelerates bushing and lower-seal wear.
Carrier hydraulic circuit (hammer has no onboard reservoir; runs off host excavator hydraulic system)	Not applicable - the H140CS has no dedicated tank of its own. Oil volume and flow are set by the host excavator; the OMM for the carrier machine governs system capacity, not the hammer. The gas accumulator on the hammer is a sealed, nitrogen-charged pressure cushion and is not a serviceable fluid.	Host machine hydraulic oil must meet the carrier's own OMM specification (e.g., Cat HYDO Advanced 10/20/30, Cat multigrade HYDO Advanced, or Cat BIO HYDO Advanced, selected by ambient temperature). On any machine fitted with a hydraulic hammer, avoid SAE 0W and SAE 5W viscosity-grade hydraulic oils regardless of climate, since these lighter grades are not suited to the continuous, heavily-loaded duty a hammer circuit imposes.

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

Caterpillar H140CS maintenance schedule

Service interval	Tasks
Every 10 h	Apply 10-15 strokes of Cat Hydraulic Hammer Paste to the tool bushing at the start of every shift; increase frequency in wet, muddy, or dusty ground. Inspect hoses, quick-disconnect couplers, and the mounting bracket pins daily for leaks, cracks, or looseness. Check the tool shank and retainer pin for looseness or mushrooming before starting work. Confirm the carrier's auxiliary/hammer circuit selector and stop valve function correctly before the first cycle. Weekly: wipe down the housing and inspect tie-rod bosses and welds for surface cracking. Weekly: check the top/connection plate and carrier stick pin for cracks or elongation.
Every 250 h	Inspect the tool bit for wear, flats, or mushrooming; replace once it's past the wear limit. Check upper and lower tool bushings for oval bore wear; rotate or replace as needed. Torque-check tie-rod nuts and side bolts on the housing to spec. Inspect housing wear plates for scoring where the tool guide rides; replace if grooved. Pull a hydraulic oil sample from the carrier per its own OMM interval; hammer duty loads the pump and cooler harder than digging work.
Every 500 h	Check the accumulator's nitrogen precharge pressure against spec; a fast, light blow pattern signals it's running low. Inspect the seal kit and piston guide for weeping grease or hydraulic oil; renew seals if leaking. Inspect the mounting bracket pin bores and carrier stick pin for elongation. Replace hoses showing cracking, swelling, or abrasion at the hammer end. Re-check the lower bushing bore; line-bore and fit an oversized bushing if wear is beyond the replacement limit.
Every 1,000 h	Replace the full seal kit and accumulator diaphragm on schedule, or at one year, whichever comes first, even if no leak is visible yet. Open the power cell and inspect the piston and cylinder bore for scoring or step wear. Check tie-rods and through-bolts for stretch; replace any fastener outside spec instead of re-torquing it. Inspect the front-head bushing bore for wear beyond factory oversize limits. Check the housing for stress cracking around the tie-rod bosses and top mounting flange.
Every 2,000 h	Run a full power-cell teardown: assess valve, piston, and cylinder wear against factory limits. Evaluate the housing for weld repair or replacement once wear-plate and boss wear can no longer be corrected by line-boring. Replace the accumulator assembly on an age basis if precharge has drifted more than once since the last service. Re-torque or replace the tie-rods and side bolts as a matched set rather than individually.
Every 4,000 h	Send the housing and power cell for a full rebuild inspection once cumulative bushing and bore rework has reached its practical limit. Replace the tool, bushings, and seal kit together rather than piecemeal at this stage. Pressure-test or replace the accumulator diaphragm before returning the hammer to service. Log the rebuild against the serial number for resale and parts-history purposes.

Servicing the H140CS beyond the schedule

Predictive Maintenance & Fluid Analysis

The H140Cs carries no oil reservoir of its own, so predictive care centers on the carrier's hydraulic circuit and the hammer's sealed nitrogen accumulator. Pull periodic oil samples from the host excavator per its own OMM interval, since hammer duty cycles load the pump, filters, and cooler harder than digging work. Track accumulator precharge pressure at each service interval; a slow drift down shows up as faster, lighter blows before a part actually fails. A sudden rise in grease consumption at the tool bushing usually flags a worn seal.

Corrective & Common Repairs

Most H140Cs repairs trace to the tool-bushing interface and the tie-rod/side-bolt housing this CS generation uses instead of a one-piece case. Expect to replace bushings once bore wear goes oval, swap the tool when the shank mushrooms or the retainer pin loosens, and renew seal kits when oil weeps past the piston guide. Blank firing, hammering with nothing underneath the tool, is the leading cause of early bushing and front-head damage; repair means fresh bushings, a replaced tool, and a torque check on the tie-rods.

Overhaul & Rebuild Points

A full H140Cs rebuild centers on the power cell: piston and cylinder bore condition, front-head bushing wear past factory oversize limits, and housing wear-plate scoring where the tool guide rides. Because this generation ties the case together with tie-rods and side bolts rather than a cast one-piece shell, check those fasteners for stretch and the housing bosses for cracking at every teardown. Where bushing bore wear exceeds the standard replacement limit, shops line-bore and fit an oversized bushing, or weld and machine the bore back to spec.

Seasonal & Environment Servicing

Cold weather thickens the carrier's hydraulic oil and stiffens the grease at the tool bushing, so warm up the excavator's auxiliary circuit before running the H140Cs at full power. Grease more often until oil temperature stabilizes. In demolition or quarry dust, grit works past the tool seal faster than in clean digging, so shorten the bushing-grease interval and check the lower seal more often. Wet or muddy ground washes grease out of the bushing bore fast, so grease at shift-start, not by the calendar.

H140CS attachments & work tools

Carrier/excavator class

Sized for roughly 20-25 tonne class hydraulic excavators, matched to machines in the Cat 325-330 size range and comparably sized competitive carriers. Reported maximum carrier operating weight for this hammer size is around 42,000 kg (92,600 lb); confirm against the carrier's own boom/stick hydraulic and lift-capacity rating before fitment.

Tool/moil bit options

Offered with a chisel point, moil (single) point, blunt point, and pyramid point as the core tool line, with long-chisel and rock-specific (hard/soft rock) chisel variants also cataloged for this size class. Tool shank diameter for this size class runs about 139 mm (5.49 in); the same tool line is shared with the sibling H140DS unit on this platform.

Mounting/bracket system

Mounts via standard Cat hammer bracket options for this size class: pin-on (fixed top) brackets, pin-grabber quick-coupler brackets, and pin-lock quick-coupler brackets, selected to match the carrier's stick/coupler configuration. A flat top-mount bracket style is used to keep breaker force and stick force in line, reducing recoil and bending load transferred into the excavator stick.

Hydraulic/valve arrangement

Runs on a multi-valve circuit including a pressure control valve that holds hydraulic pressure at the level needed for full-power blows; a minimum rated flow figure near 42 gpm has been reported for this size class, but confirm actual flow/pressure requirement against the carrier's auxiliary hydraulic circuit and any factory hammer kit fitted to the excavator.

Operating weight and length

Working weight is commonly reported around 2,350 kg with an overall top-plate-to-tool-tip length near 2.64 m (103.9 in) for this size class; treat exact figures as varying by configuration/series since C-series and D-series siblings on this platform are documented with closely overlapping numbers.

Factory configuration options

Later hammer generations in this same size class (S and GC S successors) added a standard onboard auto-lubrication system and an enclosed, sound-suppressed housing as factory features; these are not confirmed as standard equipment on the H140CS itself, so verify current-build configuration with a dealer rather than assuming carryover.

All H140CS assemblies by section

Every catalogued assembly group for the Caterpillar H140CS. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Hydraulic System

187-7720 Accumulator Gp-Hydraulic

18***42	Base; (Accumulator)	1
18***43	Cover	1
18***44	Diaphragm	1
18***84	Kit-Seal	1

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187-8450 Accumulator Gp-Hydraulic

11***23	Cover	1
12***27	Kit-Seal	1
18***34	Base	1
18***43	Diaphragm	1

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203-0872 Body Gp-Valve

20***72	Body Group-Valve	1
20***77	Plug	1
3J***07	Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve	2
3K***60	Seal Pilot Manifold On; Seal To Boom Check Valve Drain	1

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203-0813 Body Gp-Valve

20***13	Body Group-Valve	1
20***77	Plug	1
3J***07	Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve	2
3K***60	Seal Pilot Manifold On; Seal To Boom Check Valve Drain	1

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311-1995 Chart-Connecting Lines

13***31	Lines Group-Connecting	1
13***16	Lines Group-Connecting	1
14***79	Lines Group-Connecting	1
14***73	Lines Group-Connecting	1

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311-1997 Chart-Connecting Lines

11***09	Lines Group-Connecting	1
11***10	Lines Group-Hammer; -Custom	1
12***02	Lines Group-Connecting	1
12***33	Lines Group-Connecting	1

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121-0227 Kit-Seal

11***10	Seal	2
11***11	Seal	1
11***12	Seal	1
11***13	Seal	1

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185-0084 Kit-Seal

09***92	Seal-O-Ring; (229.3mm Id)	3
09***31	Seal-O-Ring	1
10***92	Seal-O-Ring	1
14***44	Seal	1

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187-0972 Kit-Seal

09***33	Seal-O-Ring; (Id=209.30mm)	1
10***92	Seal-O-Ring	1
14***44	Seal	1
15***50	Seal	1

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141-8379 Lines Gp-Connecting

14***79	Lines Group-Connecting	1
1P***04	Seal - Rectangular (45mm Dia)	4
1P***67	Flange-Half (43.31 mm Id)	4
4J***20	Seal (For Tilt Ports On Valve)	1

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197-4102 Lines Gp-Connecting

19***02	Lines Group-Connecting	1
1P***04	Seal - Rectangular (45mm Dia)	4
1P***67	Flange-Half (43.31 mm Id)	4
23***70	Flange-Split	4

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143-4073 Lines Gp-Connecting

14***73	Lines Group-Connecting	1
14***99	Grommet	2
1P***04	Seal - Rectangular (45mm Dia)	2
20***73	Hose As	2

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131-1394 Lines Gp-Connecting

13***06	Hose As	2
13***94	Lines Group-Connecting	1
14***98	Grommet	2
1P***03	Seal - Rectangular (31.86mm Id)	2

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246-4972 Lines Gp-Connecting

1P***04	Seal - Rectangular (45mm Dia)	4
1P***67	Flange-Half (43.31 mm Id)	8
24***08	Grommet	2
24***72	Lines Group-Connecting	1

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149-6093 Lines Gp-Connecting

14***93	Lines Group-Connecting	1
1P***04	Seal - Rectangular (45mm Dia)	4
23***70	Flange-Split	8
24***67	Hose As	2

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138-8116 Lines Gp-Connecting

13***43	Valve Group-Manual; (Auxiliary Hydraulic Lines)	2
13***16	Lines Group-Connecting	1
1P***03	Seal - Rectangular (31.86mm Id)	3
1P***04	Seal - Rectangular (45mm Dia)	1

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137-6631 Lines Gp-Connecting

13***31	Lines Group-Connecting	1
18***34	Hose As	1
18***00	Hose As	1
19***31	Hose As	1

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130-8296 Lines Gp-Connecting

13***96	Lines Group-Connecting	1
13***97	Hose As	2
14***99	Grommet	2
1P***04	Seal - Rectangular (45mm Dia)	4

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118-9209 Lines Gp-Connecting

11***07	Hose As	1
11***09	Lines Group-Connecting	1
12***12	Hose As	1
14***98	Grommet	1

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165-7963 Lines Gp-Connecting

14***98	Grommet	2
14***99	Grommet	2
15***72	Pin-Lynch	2
16***63	Lines Group-Connecting	1

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147-6183 Lines Gp-Connecting

13***43	Valve Group-Manual; (Auxiliary Hydraulic Lines)	2
14***83	Lines Group-Connecting	1
1P***03	Seal - Rectangular (31.86mm Id)	2
1P***04	Seal - Rectangular (45mm Dia)	4

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130-8607 Lines Gp-Connecting

13***06	Hose As	1
13***07	Lines Group-Connecting	1
14***98	Grommet	1
1P***03	Seal - Rectangular (31.86mm Id)	1

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178-9288 Lines Gp-Connecting

14***98	Grommet	2
17***88	Lines Group-Connecting	1
1P***03	Seal - Rectangular (31.86mm Id)	2
20***41	Hose As	2

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123-4802 Lines Gp-Connecting

12***02	Lines Group-Connecting	1
1P***03	Seal - Rectangular (31.86mm Id)	1
1P***04	Seal - Rectangular (45mm Dia)	3
1P***67	Flange-Half (43.31 mm Id)	4

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153-0118 Lines Gp-Connecting

164-5072 Lines Gp-Connecting

15***72	Pin-Lynch	2
16***72	Lines Group-Connecting	1
1P***04	Seal - Rectangular (45mm Dia)	4
1P***67	Flange-Half (43.31 mm Id)	4

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158-4616 Lines Gp-Connecting

14***98	Grommet	2
15***16	Lines Group-Connecting	1
1P***03	Seal - Rectangular (31.86mm Id)	2
20***40	Hose As	2

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154-6216 Lines Gp-Connecting

14***98	Grommet	1
14***99	Grommet	1
15***16	Lines Group-Connecting	1
1P***03	Seal - Rectangular (31.86mm Id)	1

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158-6271 Lines Gp-Connecting

14***98	Grommet	2
15***71	Lines Group-Connecting	1
1P***03	Seal - Rectangular (31.86mm Id)	2
1P***04	Seal - Rectangular (45mm Dia)	2

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125-0033 Lines Gp-Connecting

12***33	Lines Group-Connecting	1
12***13	Hose As	2
1P***04	Seal - Rectangular (45mm Dia)	4
1P***67	Flange-Half (43.31 mm Id)	4

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154-6215 Lines Gp-Connecting

15***15	Lines Group-Connecting	1
1P***04	Seal - Rectangular (45mm Dia)	2
23***70	Flange-Split	4
24***08	Grommet	2

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175-2645 Lines Gp-Connecting

14***98	Grommet	2
17***45	Lines Group-Connecting	1
1P***04	Seal - Rectangular (45mm Dia)	2
20***44	Hose As	2

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130-8266 Lines Gp-Connecting

13***66	Lines Group-Connecting	1
14***99	Grommet	1
1P***04	Seal - Rectangular (45mm Dia)	4
1P***67	Flange-Half (43.31 mm Id)	4

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118-9210 Lines Gp-Connecting

11***10	Lines Group-Hammer; -Custom	1
12***12	Hose As	2
14***99	Grommet	2
1P***04	Seal - Rectangular (45mm Dia)	4

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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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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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187-8608 Valve Gp-Check

12***88	Housing-Valve	1
18***84	Kit-Seal	1
18***72	Kit-Seal	1
18***08	Valve Group-Check	1

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203-0811 Valve Gp-Check

20***09	Housing-Valve	1
20***11	Valve Group-Check	1
3E***06	Ring-Retaining	1
3E***25	Seal-O-Ring; (44.2mm Id)	1

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203-0873 Valve Gp-Control

15***09	Seal	6
18***15	Valve As-Pilot	1
18***28	Bushing-Valve	1
18***29	Spool-Main	1

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203-0815 Valve Gp-Control

15***70	Seal	6
18***15	Valve As-Pilot	1
18***81	Seal-O-Ring	1
18***82	Seal	1

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187-7721 Valve Gp-Pressure Control

15***09	Seal	6
18***15	Valve As-Pilot	1
18***16	Body-Valve	1
18***28	Bushing-Valve	1

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187-8451 Valve Gp-Pressure Control

15***70	Seal	6
18***15	Valve As-Pilot	1
18***81	Seal-O-Ring	1
18***82	Seal	1

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187-8614 Valve Gp-Pressure Reducing

11***27	Spool	1
11***28	Spool	1
11***53	Guide	1
18***44	Cover	1

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187-8610 Valve Gp-Pressure Reducing

12***82	Cover	1
12***85	Guide	1
12***86	Spool	1
18***46	Housing-Valve	1

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187-8092 Valve Gp-Sequence

10***46	Plug	1
10***92	Seal-O-Ring	1
17***53	Bolt-Socket Head; (M12x1.75x40-mm)	4
18***54	Spool	1

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187-8452 Valve Gp-Sequence

10***46	Plug	2
10***92	Seal-O-Ring	1
17***53	Bolt-Socket Head; (M12x1.75x40-mm)	4
18***55	Spool	1

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Service Equipment And Supplies

184-9837 Film Gp

14***69	Film-Warning; (Alert)	2
14***70	Film-Warning; (Read Omm)	2
15***57	Film-Warning; (Flying Debris, Hearing Protn)	2
15***79	Film-Instruction; (Grease)(Instructions)	2

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184-9842 Film Gp

14***69	Film-Warning; (Alert)	2
14***70	Film-Warning; (Read Omm)	2
15***57	Film-Warning; (Flying Debris, Hearing Protn)	2
15***79	Film-Instruction; (Grease)(Instructions)	2

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Work Tool Arrangement

203-0818 Hammer Ar-Hydraulic

12***20	Tool Box Group	1
20***17	Hammer Ar-Hydraulic	1
20***18	Hammer Ar-Hydraulic	1

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184-9838 Hammer Ar-Hydraulic

12***19	Tool Box Group; (European Source Only)	1
18***38	Hammer Ar-Hydraulic	1
18***39	Hammer Ar-Hydraulic	1

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184-9833 Hammer Ar-Hydraulic

12***20	Tool Box Group	1
18***33	Hammer Ar-Hydraulic	1
18***34	Hammer Ar-Hydraulic	1

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203-0876 Hammer Ar-Hydraulic

12***19	Tool Box Group; (European Source Only)	1
20***75	Hammer Ar-Hydraulic	1
20***76	Hammer Ar-Hydraulic	1

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203-0875 Hammer Ar-Hydraulic

18***41	Housing Group-Hammer	1
18***42	Film Group	1
20***74	Hammer Group-Hydraulic	1
20***75	Hammer Ar-Hydraulic	1

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184-9839 Hammer Ar-Hydraulic

18***39	Hammer Ar-Hydraulic	1
18***40	Hammer Group-Hydraulic	1
18***41	Housing Group-Hammer	1
18***42	Film Group	1

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184-9834 Hammer Ar-Hydraulic

18***34	Hammer Ar-Hydraulic	1
18***35	Hammer Group-Hydraulic	1
18***36	Housing Group-Hammer	1
18***37	Film Group	1

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203-0817 Hammer Ar-Hydraulic

18***36	Housing Group-Hammer	1
18***37	Film Group	1
20***16	Hammer Group-Hydraulic	1
20***17	Hammer Ar-Hydraulic	1

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Work Tools

7y-2219 Adjuster Gp-Bucket

08***21	Shim (0.5mm Thick)	4
08***22	Shim (1.0mm Thick)	6
13***48	Plate	1
19***14	Pin	1

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087-5960 Adjuster Gp-Bucket

08***60	Adjuster Group-Bucket; -E, F-Family	1
13***51	Plate	1
16***92	Flange	1
4I***04	Shim (0.5mm Thick)	4

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7y-3476 Adjuster Gp-Bucket

08***74	Pin	1
08***75	Shim (0.5mm Thick)	4
08***76	Shim (1.0mm Thick)	6
08***78	Flange	1

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122-7988 Bracket Gp-Mounting

12***88	Bracket Group-Mounting	1
12***90	Bracket As	1
7Y***71	Plate	2
7Y***65	Bolt; (M36x4x140-mm)	10

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123-9625 Bracket Gp-Mounting

12***25	Bracket Group-Mounting	1
12***01	Bracket As	1
13***55	Setscrew; (M4x0.7x8-mm)	2
7Y***65	Bolt; (M36x4x140-mm)	10

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112-5537 Bracket Gp-Mounting

11***04	Bracket As	1
11***37	Bracket Group-Mounting	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7Y***71	Plate	2

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112-8202 Bracket Gp-Mounting

11***02	Bracket Group-Mounting	1
16***71	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7Y***71	Plate	2

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116-6375 Bracket Gp-Mounting

11***75	Bracket Group-Mounting	1
11***10	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7X***54	Bolt; (M24x3.0x110mm)	10

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179-9862 Bracket Gp-Mounting

17***62	Bracket Group-Mounting	1
17***75	Bracket As	1
7Y***65	Bolt; (M36x4x140-mm)	10
8T***18	Lock Nut; (M36x4 Thd)	10

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324-7896 Bracket Gp-Mounting

09***79	Nut; (M36x4.0 Thd)	10
13***55	Setscrew; (M4x0.7x8-mm)	2
32***96	Bracket Group-Mounting	1
32***98	Bracket As	1

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179-9864 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
17***64	Bracket Group-Mounting	1
17***77	Bracket As	1
7Y***65	Bolt; (M36x4x140-mm)	10

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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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128-4341 Bracket Gp-Mounting

12***41	Bracket Group-Mounting	1
17***39	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7Y***71	Plate	2

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129-8147 Bracket Gp-Mounting

12***47	Bracket Group-Mounting	1
12***48	Bracket As	1
7Y***65	Bolt; (M36x4x140-mm)	10
8T***18	Lock Nut; (M36x4 Thd)	10

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123-4115 Bracket Gp-Mounting

12***15	Bracket Group-Mounting	1
12***52	Bracket As	1
4B***58	Screw (Identification Plate) Mounting	4
6V***76	Nut-Lock; (M24 X 3.0)	10

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251-4647 Bracket Gp-Mounting

25***47	Bracket Group-Mounting	1
25***15	Bracket As	1
7Y***65	Bolt; (M36x4x140-mm)	10
8T***18	Lock Nut; (M36x4 Thd)	10

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123-9615 Bracket Gp-Mounting

12***15	Bracket Group-Mounting	1
12***94	Bracket As	1
13***55	Setscrew; (M4x0.7x8-mm)	2
7X***54	Bolt; (M24x3.0x110mm)	10

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123-6315 Bracket Gp-Mounting

12***12	Bracket As	1
12***15	Bracket Group-Mounting	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7X***54	Bolt; (M24x3.0x110mm)	10

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253-4254 Bracket Gp-Mounting

25***54	Bracket Group-Mounting	1
25***55	Bracket As	1
7Y***65	Bolt; (M36x4x140-mm)	10
8T***18	Lock Nut; (M36x4 Thd)	10

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206-0950 Bracket Gp-Mounting

20***50	Bracket Group-Mounting	1
20***51	Bracket As	1
7Y***65	Bolt; (M36x4x140-mm)	10
8T***18	Lock Nut; (M36x4 Thd)	10

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112-4831 Bracket Gp-Mounting

11***31	Bracket Group-Mounting	1
11***42	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7Y***71	Plate	0

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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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225-9607 Bracket Gp-Mounting

22***07	Bracket Group-Mounting	1
22***08	Bracket As	1
7Y***65	Bolt; (M36x4x140-mm)	10
8T***18	Lock Nut; (M36x4 Thd)	10

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128-4338 Bracket Gp-Mounting

12***38	Bracket Group-Mounting	1
17***34	Bracket As	1
7Y***71	Plate	2
7Y***65	Bolt; (M36x4x140-mm)	10

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129-1545 Bracket Gp-Mounting

12***45	Bracket Group-Mounting	1
12***46	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7X***54	Bolt; (M24x3.0x110mm)	10

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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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179-9861 Bracket Gp-Mounting

17***61	Bracket Group-Mounting	1
17***74	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	14
8T***63	Bolt; (M24x3x120-mm)	14

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233-8301 Bracket Gp-Mounting

23***01	Bracket Group-Mounting	1
23***06	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7X***54	Bolt; (M24x3.0x110mm)	10

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251-0068 Bracket Gp-Mounting

25***68	Bracket Group-Mounting	1
25***69	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10
8T***63	Bolt; (M24x3x120-mm)	10

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251-3801 Bracket Gp-Mounting

25***00	Bracket As	1
25***01	Bracket Group-Mounting	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7X***54	Bolt; (M24x3.0x110mm)	10

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112-4833 Bracket Gp-Mounting

11***33	Bracket Group-Mounting	1
11***36	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7Y***71	Plate	2

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121-5546 Bracket Gp-Mounting

08***60	Adjuster Group-Bucket; -E, F-Family	1
12***46	Bracket Group-Mounting	1
12***17	Bracket As	1
4B***58	Screw (Identification Plate) Mounting	4

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162-8712 Bracket Gp-Mounting

16***12	Bracket Group-Mounting	1
16***90	Bracket As	1
7X***89	Bolt; (M24x3x100-mm)	10
8T***01	Nut (M24 X 3 Thd); (M24x3.00 Thd)	10

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226-2411 Bracket Gp-Mounting

22***11	Bracket Group-Mounting	1
22***12	Bracket As	1
7Y***65	Bolt; (M36x4x140-mm)	10
8T***18	Lock Nut; (M36x4 Thd)	10

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324-5906 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
32***06	Bracket Group-Mounting	1
32***07	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10

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179-9863 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
17***63	Bracket Group-Mounting	1
17***76	Bracket As	1
7Y***65	Bolt; (M36x4x140-mm)	10

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112-5850 Bracket Gp-Mounting

11***50	Bracket Group-Mounting	1
11***09	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7Y***71	Plate	2

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116-8201 Bracket Gp-Mounting

11***01	Bracket Group-Mounting	1
11***02	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10
8T***63	Bolt; (M24x3x120-mm)	10

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123-0397 Bracket Gp-Mounting

12***97	Bracket Group-Mounting	1
12***98	Bracket As	1
7Y***65	Bolt; (M36x4x140-mm)	10
8T***18	Lock Nut; (M36x4 Thd)	10

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123-7421 Bracket Gp-Mounting

12***21	Bracket Group-Mounting	1
3J***07	Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve	1
3J***54	Packing,Preformed Part Of Kit P/N 5r***27	1
3K***60	Seal Pilot Manifold On; Seal To Boom Check Valve Drain	2

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123-3343 Bracket Gp-Mounting

12***43	Bracket Group-Mounting	1
12***44	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7X***54	Bolt; (M24x3.0x110mm)	10

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158-2882 Bracket Gp-Mounting

15***40	Bracket As	1
15***82	Bracket Group-Mounting	1
6A***99	Bearing-Sleeve	4
6V***76	Nut-Lock; (M24 X 3.0)	10

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166-1272 Bracket Gp-Mounting

16***72	Bracket Group-Mounting	1
20***03	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7X***54	Bolt; (M24x3.0x110mm)	10

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179-9860 Bracket Gp-Mounting

17***60	Bracket Group-Mounting	1
17***73	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7X***54	Bolt; (M24x3.0x110mm)	10

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128-4336 Bracket Gp-Mounting

12***36	Bracket Group-Mounting	1
12***37	Bracket As	1
7X***55	Bolt; (M24x3x260-mm)	1
7Y***71	Plate	2

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125-5654 Bracket Gp-Mounting

12***50	Bracket As	1
12***54	Bracket Group-Mounting	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7X***89	Bolt; (M24x3x100-mm)	10

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127-4923 Bracket Gp-Mounting

12***22	Bracket As	1
12***23	Bracket Group-Mounting	1
7Y***71	Plate	2
7Y***65	Bolt; (M36x4x140-mm)	10

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127-9350 Bracket Gp-Mounting

12***50	Bracket Group-Mounting	1
12***51	Bracket As	1
7X***55	Bolt; (M24x3x260-mm)	1
7Y***71	Plate	2

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209-8269 Bracket Gp-Mounting

20***69	Bracket Group-Mounting	1
20***70	Bracket As	1
7Y***65	Bolt; (M36x4x140-mm)	10
8T***18	Lock Nut; (M36x4 Thd)	10

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121-6188 Bracket Gp-Mounting

12***88	Bracket Group-Mounting	1
12***84	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7X***54	Bolt; (M24x3.0x110mm)	10

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179-9865 Bracket Gp-Mounting

17***65	Bracket Group-Mounting	1
17***78	Bracket As	1
7Y***65	Bolt; (M36x4x140-mm)	10
8T***18	Lock Nut; (M36x4 Thd)	10

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258-7936 Bracket Gp-Mounting

25***35	Bracket As	1
25***36	Bracket Group-Mounting	1
6V***76	Nut-Lock; (M24 X 3.0)	10
7Y***71	Plate	2

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224-8430 Bracket Gp-Mounting

22***30	Bracket Group-Mounting	1
22***31	Bracket As	1
6V***76	Nut-Lock; (M24 X 3.0)	14
7X***54	Bolt; (M24x3.0x110mm)	14

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125-6582 Bracket Gp-Mounting

08***60	Adjuster Group-Bucket; -E, F-Family	1
12***53	Bracket As	1
12***82	Bracket Group-Mounting	1
4B***58	Screw (Identification Plate) Mounting	4

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255-7552 Bracket Gp-Mounting

25***52	Bracket Group-Mounting	1
25***06	Bracket As	1
7Y***71	Plate	2
7Y***65	Bolt; (M36x4x140-mm)	10

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123-7419 Bracket Gp-Mounting

12***19	Bracket Group-Mounting	1
12***20	Bracket As	1
13***55	Setscrew; (M4x0.7x8-mm)	2
7Y***71	Plate	2

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308-4130 Chart-Hammer Mounting

11***31	Bracket Group-Mounting	1
11***33	Bracket Group-Mounting	1
11***37	Bracket Group-Mounting	1
11***50	Bracket Group-Mounting	1

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308-4133 Chart-Hammer Mounting

17***60	Bracket Group-Mounting	1
17***61	Bracket Group-Mounting	1
17***62	Bracket Group-Mounting	1
17***63	Bracket Group-Mounting	1

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308-4131 Chart-Hammer Mounting

12***19	Bracket Group-Mounting	1
12***15	Bracket Group-Mounting	1
12***25	Bracket Group-Mounting	1
12***54	Bracket Group-Mounting	1

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308-4132 Chart-Hammer Mounting

11***02	Bracket Group-Mounting	1
16***12	Bracket Group-Mounting	1
16***72	Bracket Group-Mounting	1
20***50	Bracket Group-Mounting	1

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189-2972 Chart-Hammer Tool

18***87	Tool-Chisel	1
18***91	Tool-Moil Point	1
18***92	Tool-Pyramid Point	1
18***93	Tool-Blunt	1

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189-2965 Chart-Hammer Tool

18***95	Tool-Chisel	1
18***99	Tool-Moil Point	1
18***00	Tool-Pyramid Point	1
18***01	Tool-Blunt	1

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203-0874 Hammer Gp-Hydraulic

09***92	Seal-O-Ring; (229.3mm Id)	3
10***97	Bolt-Socket Head; (M12x1.75x50-mm)	4
10***85	Bolt-Socket Head; (M12x1.75x60-mm)	1
11***18	Pin	2

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203-0816 Hammer Gp-Hydraulic

09***33	Seal-O-Ring; (Id=209.30mm)	1
10***97	Bolt-Socket Head; (M12x1.75x50-mm)	4
11***08	Bolt; (M33x2x186-mm)	8
11***18	Pin	2

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184-9835 Hammer Gp-Hydraulic

09***33	Seal-O-Ring; (Id=209.30mm)	1
10***97	Bolt-Socket Head; (M12x1.75x50-mm)	4
11***08	Bolt; (M33x2x186-mm)	8
11***18	Pin	2

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184-9840 Hammer Gp-Hydraulic

09***92	Seal-O-Ring; (229.3mm Id)	3
10***97	Bolt-Socket Head; (M12x1.75x50-mm)	4
10***85	Bolt-Socket Head; (M12x1.75x60-mm)	1
11***18	Pin	2

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184-9867 Housing Gp-Hammer

11***27	Eyebolt	1
13***64	Pin	7
15***20	Bushing; (Middle)	4
15***21	Bushing; (Middle)	4

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184-9836 Housing Gp-Hammer

12***93	Pad	2
12***94	Buffer As	1
12***01	Pin	1
13***78	Plug-Rubber	6

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184-9841 Housing Gp-Hammer

11***24	Pad	2
11***25	Buffer As	1
13***78	Plug-Rubber	6
13***79	Plug-Rubber	6

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185-0695 Housing Gp-Hammer

11***27	Eyebolt	1
13***64	Pin	7
15***20	Bushing; (Middle)	4
15***21	Bushing; (Middle)	4

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H140CS serial number reference

The PIN plate is riveted to the hammer housing (the outer sound-suppressed shell), usually on a flat pad near the top mounting flange or on the side of the housing casting, not on the carrier excavator. It reads the full model designation (e.g. H140C S) followed by the serial number; the first three characters of the serial are the plant/model prefix and the digits after are the sequence number for that block. If the plate is worn or missing, cross-check the prefix against the fitment tables in the hammer's parts manual.

Prefix	Identifies	Notes
BED	H140C S / H160C S "C"-box, sound-suppressed generation	Covers the H140C S hammer in a parts book shared with the H160C S size. This is the predecessor generation to the later D-box hammer; box style is the sound-suppressed C housing with the C-series power cell. No published sub-cutoff splits H140 from H160 within this prefix block, so confirm size from the model callout stamped on the PIN plate itself, not the serial alone. Rough era: mid-to-late 1990s into early 2000s, before the D-series succeeded it.

Frequently asked questions

What engine does the Cat H140Cs use?

None. The H140Cs is a passive hydraulic hammer with no engine, cooling system, or fuel tank of its own. It mounts to an excavator boom and runs entirely off the host carrier's auxiliary hydraulic circuit, typically a 25,000-40,000 kg class excavator supplying roughly 160-230 L/min of flow at about 160 bar. Any engine service belongs to the carrier machine's own OMM, not the hammer.

What is the operating weight of the Cat H140Cs?

The hammer itself weighs about 2,350-2,355 kg (5,170-5,182 lb). It's matched to carriers with an operating weight roughly between 25,000 kg and 40,000 kg (55,000-88,000 lb), with some parts listings citing a maximum carrier weight near 42,000 kg (92,600 lb).

What replaced the Cat H140Cs?

Caterpillar succeeded the C-box H140Cs with the D-box H140DS, which carries the BXB serial prefix and keeps the same core hammer size and tool line in a different housing style. The lineup has since moved on again to the current H140 S Performance Hammer and H140 GC S silenced generations, which add standard auto-lubrication and updated sound suppression not confirmed on the CS generation.

What H140CS owners discuss

What carrier and hydraulic flow does the H140CS actually need to perform correctly?

The H140CS is sized for excavators in roughly the 25-40 tonne class, with a published maximum carrier weight near 42 tonnes. Minimum rated oil flow sits around 160 L/min (42 gpm), and hammers in this weight class typically run up to about 230 L/min (60 gpm) depending on the carrier's auxiliary circuit, with working pressure in the neighborhood of 160 bar (2,300 psi). Mechanics stress matching the hammer to the carrier's real flow and pressure, not just tonnage: an undersized circuit starves the hammer and gives weak, slow hits, while an oversized or poorly relieved circuit overpowers the accumulator and beats up hoses, bushings, and the mounting bracket faster than normal. Exact numbers vary by carrier configuration and hose routing, so treat these as a starting point and confirm against the excavator's own auxiliary flow spec.

How do owners tell the accumulator's nitrogen charge is going low, and what happens if it's ignored?

A hammer running low on nitrogen tends to hit fast and light instead of slow and hard. Operators describe it as tapping rather than punching, with the tool hesitating or double-bouncing at the top of the stroke. The clearest field sign is the large hydraulic hoses jumping or hopping at the hammer end during operation, along with more vibration coming back through the boom into the cab and oil temperature climbing faster than normal. Left unaddressed, the unabsorbed pressure spikes chew through hose ends, seals, and bushings well ahead of schedule. General shop guidance for this hammer class puts diaphragm and seal-set replacement around 1,000 hours or one year, whichever comes first, but pre-charge pressure varies by model and duty cycle. Have your dealer or a qualified hydraulic tech confirm and set the correct charge for this specific serial range; charging is a pressurized-gas procedure, not a DIY top-off.

What wear pattern is typical on the tool, bushings, and retaining hardware, and does the H140CS have quirks tied to its construction?

Like other hammers in this size class, the H140CS shows bushing wear as an oval bore rather than a round one, plus scoring on the outer bushing and looseness at the tool pin or retainer before anything visibly breaks. This CS-series housing uses a tie-rod and side-bolt construction rather than the one-piece housing found on Cat's newer Performance-series hammers, so owners sourcing parts should expect tie rods and side bolts as normal wear/service items, not just seals. Parts suppliers note the H140CS shares upper bushings and seal kits with the larger H160CS, worth knowing when sourcing service parts. Bushings are usually serviceable by rotation or straight replacement within wear limits; once wear exceeds bushing OD, the bore typically needs line boring with an oversized bushing, or a weld-and-machine repair back to factory dimension.

What operating habit causes the most avoidable damage on a hammer like the H140CS?

The most common self-inflicted damage on hammers this size is blank firing: running the tool with nothing underneath it, or continuing to hammer after the material has already broken through. It mushrooms the tool tip, sends excess shock into the piston, bushings, and boom structure, and is a leading cause of premature front-head and bushing failure. Experienced operators release the trigger the instant material lets go and use a scoring technique on hard rock, breaking in one spot for 15-30 seconds before repositioning rather than parking the tool in one dead spot. Without a carrier-side idle or anti-blank-fire circuit, avoiding this damage comes down almost entirely to operator habit.

What's the grease-point maintenance routine mechanics recommend for this class of hammer?

Grease habits mentioned by mechanics center on the tool bushing and retainer area, the highest-wear contact point on any hammer in this class. Where a unit isn't fitted with a continuous auto-lube system, the routine cited is roughly 10-15 strokes of grease at the tool bushing at the start of each shift, more often in dusty or wet ground conditions that wash grease out quickly. Skipping this greasing is the fastest way to turn a round bushing bore into an oval one.

The hammer stops firing or hits weak - what's the troubleshooting order mechanics actually run through?

When a hammer like this won't fire or hits weak, the troubleshooting order is largely the same regardless of brand. Confirm the carrier's auxiliary/hammer circuit is actually selected and the stop valve is open, check that hose couplers are fully seated on both ends, verify oil temperature is in the normal operating window, and cycle the piston by hand if it's accessible to rule out it being stuck from lack of grease. Only after those checks do mechanics move to the accumulator's nitrogen charge and the pressure control valve. Because the H140CS has no onboard electronics of its own, a fault almost always traces back to the carrier's hydraulic circuit, a loose or restricted hose connection, or the accumulator, not a sensor or control module.

What should a buyer check before purchasing a used H140CS?

Buyers are told to look past cosmetic wear and focus on internal condition. Check the housing for cracks around the tie-rod and side-bolt bosses, look for an oval-worn bushing bore and scoring on the outer bushing, and check the tool shank for looseness or a mushroomed tip, a sign of past blank firing. Ask for maintenance records showing seal-set and bushing service history, inspect the excavator-side mounting bracket and pin bores for elongation, and check hose ends and fittings for leaks or cracking. Have the seller run the hammer under load so you can judge impact energy and cycle rate, and have the accumulator's nitrogen charge checked so you know it's holding pressure before you buy. Because verifying the nitrogen charge and inspecting housing/mounting hardware condition affects both performance and safe operation, have your dealer verify these before you finalize a purchase.

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

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