Caterpillarwork toolhammer

Caterpillar H160CS

Maintenance schedule, common problems & OEM parts breakdown

The Caterpillar H160CS is a heavy-class hydraulic hammer (breaker) work tool built for 32,000-55,000 kg (70,400-121,000 lb) class hydraulic excavators. It carries no engine of its own — a single-piston power cell, driven entirely by the host machine's hydraulic pump, delivers 380-560 blows per minute at an energy class of about 7,500 ft-lb (10,169 J), running on 220-310 L/min (58-82 gpm) of oil at roughly 16,000 kPa (2,321 psi). Working weight with a standard tool and mounting bracket runs close to 3,157 kg (6,946 lb), though the figure shifts with the tool profile and bracket chosen for a given carrier. "CS" marks Caterpillar's C-series generation of the size-160 hammer — sound suppression was standard on this large-hammer family, not an option — sold through the 1990s and into the early-to-mid 2000s before Caterpillar moved the class to the D-series H160DS. Configurations offered included flat-top and pin-on mounting brackets plus a choice of chisel, moil, blunt, or hard-rock-chisel tool profiles for rock, concrete, and demolition duty.

The number in the name marks a size class, not a fixed spec sheet. Caterpillar has reused "160" — the nominal 160 mm (6.3 in) tool shank diameter — across every generation since: the C-series, the D-series (which added an automatic shut-off to stop blank-firing), an Es generation, and today's H160 S Performance and H160 GC S hammers. The carrier-weight range has held close to the same 32-55 t class across all of them, but output has crept up — current-generation hammers list an energy class near 8,500 ft-lb (11,524 J) against the C/D-series' 7,500 ft-lb (10,169 J) — so a parts order or spec pull needs the exact suffix, not just "160." That matters in the used and parts market: plenty of H160CS units remain in service on older 320-345-class excavators, but Caterpillar's current parts catalogs are organized around the newer S/ES/GC S branding and serial-number prefixes. Sourcing bushings, seal kits, or tie-rods for a C-series unit means working from the hammer's own serial number through a dealer parts counter rather than assuming cross-compatibility with newer hardware.

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 H160CS specifications

Engine

Power source

No engine. Top-mount hydraulic breaker powered entirely by the carrier excavator's own hydraulic circuit; no onboard engine, displacement, cylinder count, or emissions tier applies to this work tool.

Weights

Working weight	6,946 lb (3,150-3,157 kg), including standard tool and average mounting bracket, as published for this 160-size hammer through the C-series-to-D-series naming update. Sound-suppressed configurations run slightly higher.
Recommended carrier weight	70,400-121,000 lb (32,000-55,000 kg); sized for large hydraulic excavators in the roughly 32-55 t class.
Ground pressure	Not applicable / not published for this hammer size class; ground pressure is a carrier-machine spec, not a hammer spec.

Dimensions

Housing / side-plate length (flat-top mount)	91.4 in (2,326 mm).
Frontal width	28.7 in (730 mm).
Lateral width	28.7 in (730 mm).
Tool (chisel) diameter	6.3 in (160 mm).
Standard tool length	24.8 in (632 mm) typical; actual length varies by tool type (moil, chisel, blunt, hard/soft rock chisel, etc.).

Performance

Impact frequency	380-560 blows per minute.
Energy class	7,500-8,000 ft-lb (10,169-10,847 J); figure varies slightly between printings of the factory literature for this size class.
Acceptable hydraulic oil flow	58-82 gal/min (220-310 L/min).
Operating pressure	Approx. 2,320-2,321 psi (16,000 kPa / 160 bar) at maximum flow and back pressure.

Service capacities (summary)

Hydraulic / fluid system

No independent fuel tank, engine oil, or cooling system. Runs entirely on the carrier's hydraulic oil; the internal accumulator is a sealed, factory-charged diaphragm/membrane unit with no field-fill capacity published for this size class.

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

H160CS fluids & capacities

System	Capacity	Recommended fluid
Engine crankcase (with filter)	Not applicable	H160CS is an engineless hydraulic hammer work tool. It carries no engine, so there is no crankcase, oil sump, or oil filter to service.
Cooling system	Not applicable	No engine, radiator, or coolant circuit is fitted to the hammer itself.
Fuel tank	Not applicable	No fuel system. The hammer is a passive hydraulic attachment with no internal combustion source of its own.
Transmission / powertrain compartments	Not applicable	No transmission, final-drive gearing, or powertrain compartments on a hydraulic hammer work tool.
Final drives	Not applicable	No final drives. The hammer is boom-mounted and stationary; it has no travel or drive function.
Hydraulic system and tank	Not applicable to the hammer itself	The hammer has no hydraulic reservoir or pump of its own; it runs entirely off the host excavator's auxiliary hydraulic circuit. For this hammer size class, carrier flow generally runs in the 190-230 L/min (50-61 gal/min) range at roughly 16 000-18 000 kPa (2 320-2 610 psi) operating pressure, though exact figures vary by hammer generation/trim and carrier match. Fill and maintain the carrier's own hydraulic tank per that machine's OMM, using the hydraulic oil grade the carrier calls for (typically a Cat multigrade hydraulic oil such as HYDO Advanced or the carrier-specific equivalent).
Axles / differentials	Not applicable	No axles or differentials; this is a work tool, not a self-propelled machine.
Grease (tool bushing lubrication)	No fixed fill volume published. Grease is applied by gun strokes at the tool bushing purge point, or fed continuously from a small onboard autolube canister on hammers so equipped; this is not a measured reservoir capacity.	Cat Hydraulic Hammer Paste, a copper-and-graphite paste grease, at the front-head tool bushings and retaining pin bores. Apply until fresh grease purges from the bushing seal, roughly 10-15 gun strokes per point at each scheduled interval; shorten the interval in wet, muddy, or high-cycle-count work. This paste is formulated for extreme heat, holding film strength to roughly 1100 degC (2012 degF), and is the lubricant Caterpillar specifies across its H-series hammer line for this class of tool. No separate viscosity-by-climate grades are published for this paste; it is a single all-climate formulation.

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

Caterpillar H160CS maintenance schedule

Service interval	Tasks
Every 10 h	Grease the upper and lower tool bushings through the marked grease points roughly every 2 hours of operation (about 4 times a shift), applying 10-15 strokes per point. Inspect the tool for cracks, chipping, or excessive shank wear before starting work. Confirm both tool retaining pins are seated and show no cracking. Check hydraulic hoses, fittings, and coupler connections on the boom and stick for leaks or chafing. Verify the hammer cycles smoothly on startup with no erratic blow rate.
Every 50 h	Torque the mounting bracket bolts to the specified value at the initial 50 hours, then recheck weekly. Inspect connector hose clamps on both the boom and the stick for looseness or wear. Check supply and return hydraulic lines and fittings for damage or leaks. Rotate the tool retaining pins 180 degrees if wear shows on one side. Inspect the lower tool bushing and its seal against the clearance limits in the OMM.
Every 250 h	Inspect the tool for wear against factory limits and retire it once past service life. Watch for drift in blow rate or cycle sound as an early sign of accumulator pressure loss. Inspect the side and top buffer pads for cracking or permanent compression. Clean and inspect the lower bushing dust seal for damage.
Every 500 h	Inspect the lower tool bushing; rotate it 90 degrees or replace it once worn past tolerance. Check upper tool bushing alignment and thrust ring condition. Inspect tie-rod nuts for looseness and retorque if needed. Inspect internal wear plates for play or unusual housing noise.
Every 1,000 h	Reseal the power cell: replace the seal kit on an annual or 1000-hour basis, whichever comes first. Replace the accumulator membrane and recheck the nitrogen precharge. Inspect and replace the tool retaining pins and upper bushing as needed. Inspect the piston and cylinder bore for scoring while the power cell is open.
Every 2,000 h	Inspect the thrust ring and side, top, and bottom buffers; replace any that show wear or cracking. Check tie-rod condition and torque. Inspect and rotate or replace the internal wear plates guiding the power cell. Inspect the mounting bracket pins and bushings that interface with the excavator stick.
Every 3,000 h	Inspect and replace worn wear plates as part of a major teardown. Inspect tie-rods and nuts, and retorque to full clamping spec. Schedule a full internal inspection of the power cell if not already done. Weigh cumulative operating hours against the cylinder, piston, and front head wear-life estimates to plan the next rebuild.
Every 6,000 h	Plan a full power-cell overhaul once the cylinder, piston, and front head approach their estimated wear-life limits. Rebuild or exchange the front head, cylinder, and piston together rather than piecemeal. Replace bushings, the thrust ring, and buffers as a set during teardown. Pressure-test the rebuilt power cell and reset hour tracking before returning the hammer to service.

Servicing the H160CS beyond the schedule

Predictive Maintenance & Fluid Analysis

The H160CS carries no engine or oil of its own — it runs entirely on the host excavator's hydraulic circuit, so predictive care means watching the carrier's hydraulic oil and the hammer's own wear signals. Sample the carrier's hydraulic oil on schedule; hammer duty cycles run hotter and dirtier than digging, accelerating oxidation and introducing fine metal from piston-to-cylinder wear. Track blow rate and cycle sound for drift, an early flag for a weakening nitrogen accumulator charge or worn tool bushings before a hose or seal actually fails.

Corrective & Common Repairs

Most H160CS callouts trace to the tool interface, not the power cell. Lower tool bushing wear is the highest-frequency repair — rotate it 90 degrees once and replace at the next wear check. Retaining pins wear unevenly; rotate 180 degrees or swap if cracked. Because this C-series generation predates Cat's automatic shut-off feature, blank-firing from holding the trigger without tool-to-material contact is a real risk and a common cause of cracked front heads and bushings — train operators to release immediately on breakthrough.

Overhaul & Rebuild Points

A full rebuild centers on the power cell: cylinder, piston, and front head carry the highest wear-life ratings and define when a teardown pays off. Reseal the unit and replace the accumulator membrane on an annual or hour-based schedule, whichever comes first, and never crack the nitrogen accumulator open without the correct charging gauge — it's a dealer-level task. During teardown, inspect tie-rods for stretch and retorque to full clamping spec, and replace internal wear plates and the thrust ring as a set rather than one at a time.

Seasonal & Environment Servicing

Nitrogen accumulator precharge is temperature-sensitive — verify it seasonally, since a charge set for summer heat runs low in cold weather and blunts blow energy. In freezing conditions, warm the host excavator's hydraulic oil before heavy hammering to protect hoses and seals. In wet, muddy, or underwater work, the lower bushing dust seal takes the abuse; inspect and grease it more often, since this C-series can be fitted with an air-port kit for submerged operation. In abrasive quarry dust, shorten the tool-bushing grease interval below the standard 2-hour mark.

H160CS attachments & work tools

Carrier / excavator weight class

The 160 size class is built for excavators in roughly the 32-55 t (70,400-121,000 lb) operating-weight range, matched to a roughly 6 in (160 mm) tool shank. This range is consistent across the C, D, E and current S/GC S generations that share the "160" size number, so treat it as the size-class range rather than a figure unique to one generation; confirm against the specific generation's spec sheet before quoting a tight bracket.

Mounting / bracket system

Mounts to the carrier stick/link through a pin-on bracket sized to the boom's hole pattern and pin geometry; a flat-top (top-mount) bracket option is also offered for this weight class, keeping breaker force in line with the stick to cut recoil/bending stress into the machine and improve operator sightlines. Bracket style (pin-on vs top-mount) is chosen per carrier, not fixed to one hammer generation or serial range.

Tool shank / chisel / moil-point options

Offered with interchangeable chisel or moil-point tool bits on the class-typical shank diameter, retained by a side-bolt and tool-retainer/pin arrangement that allows field replacement. Chisel suits ductile, non-abrasive sedimentary or weak metamorphic rock and seam-opening work; moil point suits soft, non-abrasive rock and concrete where reducing retaining-pin-groove wear matters.

Hydraulic kit / arrangement notes

Runs on the carrier's auxiliary hammer circuit; published flow and pressure for the 160 size class span roughly 190-310 L/min (50-82 gpm) and 13,000-18,000 kPa (1,885-2,610 psi) depending on generation and configuration, so match the carrier's relief-valve and flow-control setting to the specific hammer's rated range rather than the class range as a whole. Treat exact flow/pressure/BPM figures as varying by configuration/series unless taken from that unit's own spec sheet.

Guarding / noise / dust options

The "s" (silenced) suffix on this size class adds internal buffering to lower jobsite noise for regulated or residential-adjacent work, carried forward through later silenced generations of the same size number. Standard onboard auto-lube/greasing and dust/contaminant seals at the tool bushing are class-wide features on the silenced variants.

Series / generation identity

H160CS designates the 160 size class in the "C" generation with the silenced (s) configuration, documented alongside its H140Cs sibling in Caterpillar's own C-series hammer parts manual. Caterpillar later issued D-generation (H160Ds) and E-generation (H160Es) silenced hammers in the same 160 size class, then replaced the lettered scheme with the current unlettered H160 S Performance and H160 GC S hammers; specs published for the D, E, S or GC generations should not be carried back onto the C-generation tool without a source naming H160CS or H160C directly.

All H160CS assemblies by section

Every catalogued assembly group for the Caterpillar H160CS. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Hydraulic System

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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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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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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311-1997 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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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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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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121-0227 Kit-Seal

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

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153-0118 Lines Gp-Connecting

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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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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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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158-6271 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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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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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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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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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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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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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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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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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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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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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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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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158-4616 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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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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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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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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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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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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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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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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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

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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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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203-0818 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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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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184-9838 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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184-9839 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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Work Tools

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-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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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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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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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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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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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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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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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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112-8202 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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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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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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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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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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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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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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128-4338 Bracket Gp-Mounting

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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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112-4831 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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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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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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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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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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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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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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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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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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123-4115 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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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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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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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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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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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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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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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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184-9840 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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184-9836 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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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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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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Frequently asked questions

What engine does the Caterpillar H160CS use?

None. The H160CS is an engineless hydraulic hammer attachment — it has no engine, fuel system, or powertrain of its own. It runs entirely on hydraulic flow and pressure supplied by the host excavator (a 32,000-55,000 kg / 70,400-121,000 lb class machine), so its actual power output depends on the carrier it's mounted to, not on anything built into the hammer itself.

What is the operating weight of the Caterpillar H160CS?

Working weight, including a standard tool and an average mounting bracket, is documented at about 3,157 kg (6,946 lb) for this size class, though the exact figure varies with the tool profile and mounting bracket fitted for a given carrier. It's matched to excavators in the 32,000-55,000 kg (70,400-121,000 lb) operating-weight range.

What replaced the Caterpillar H160CS?

Caterpillar moved the 160 mm size class to the D-series H160DS, which added an automatic shut-off system to prevent blank-firing, then to an Es generation. Today's factory lineup covers the same size class with the H160 S Performance hammer and the H160 GC S general-duty hammer. All share the 160 mm tool shank diameter and a similar 32-55 t carrier range, but none are part-number interchangeable with the C-series.

What H160CS owners discuss

What hydraulic flow and pressure does an H160CS need from the carrier, and what happens if the excavator supplies more than that?

This size class runs 220-310 L/min (58-82 gpm) at around 16,000 kPa (approx. 2,320 psi) operating pressure, per the factory literature for this generation. Confirm the exact window off the plate or OMM for your unit, since it varies by configuration/series. If the carrier's pump puts out more flow or pressure than the hammer is rated for, don't let the hammer's own relief soak it up. Throttle the engine back until a flow meter shows correct GPM at rated pressure, and set the carrier's auxiliary relief roughly 35 bar (about 500 psi) above the hammer's operating pressure so pump, valve, and hoses are protected if the tool stalls against hard rock. Running an oversupplied circuit wide open just cooks the oil and shortens seal life.

How much wear is normal in the tool bushings, and when do they need replacing?

Plan on a visual check around every 100 hours. Lower bushings typically last 200-500 hours before replacement; uppers run longer, closer to 500 hours. Wear shows on the front and rear bushing faces as the tool rocks under impact. Rotating a lower bushing partway through its life exposes a fresh wear face and stretches service life. Once play between bushing and tool shank exceeds the limit in the OMM, replace it. Running past that point pushes side-loading into the tie rods and housing instead of straight down the tool.

What actually happens when the hammer gets blank fired, and how do operators avoid it?

Blank firing is the piston cycling with the tool tip off the material, so there's no resistance to absorb the blow. The full impact goes through the tool into the bushing and housing instead of into the rock. Repeated blank firing mushrooms the tool tip and over time can crack the housing or loosen tie rods. Operators watch for a change in sound and vibration the instant material fractures and get off the pedal right away. Scoring beats leaning on one spot: break a small area, walk the tool over, break again. If a spot hasn't given in 15-30 seconds, reposition instead of continuing to fire into it.

Does the H160CS have a nitrogen accumulator, and what goes wrong if the charge is off?

Yes. Like the rest of the Cat H-series line, this generation uses a nitrogen-charged accumulator, a gas cell with a diaphragm or membrane, to cushion the power cell. Low charge lets hydraulic pressure spike back toward the carrier's circuit and softens impact. Overcharge does the opposite and can damage the diaphragm. Correct charge pressure is model- and temperature-specific, so check it against the chart in the OMM rather than by feel. Charging is a gauge-and-regulator job through the charging valve; let the reading settle for several minutes before taking a final number rather than topping it off cold. Have your dealer verify the diaphragm is holding charge before the tool goes back into service.

How often does a hammer like this need a full reseal, and is a long shop-time quote normal?

General guidance for a working hammer is roughly an annual teardown and reseal. Shops that do this work routinely report that a straightforward reseal, covering piston, bushings, and seal/diaphragm kit, usually comes in well under a full-day quote once the unit is on the bench, though a rebuild involving worn bushings, a damaged piston, or corroded tie rods takes longer. A long quote up front is often the shop planning for worse findings once it's apart, not necessarily padding.

Why do people warn against impact wrenches on the tie rod / through bolt torque for these hammers?

The tie rods clamp the whole housing together under heavy preload. Undertorqued rods fail faster than overtorqued ones, and they need to go on evenly, to the exact spec in the OMM, not just snug. Impact wrenches are a common way these get damaged: repeated impact loading during installation can start stress fractures in the rod that later show up as a snapped bolt in the field, sometimes well after the actual damage occurred. Use a torque wrench or multiplier and the maker's tightening sequence. A failed tie rod can let the housing separate under power, so have your dealer verify torque and rod condition if you're unsure of a rod's service history.

What should I check before buying a used H160CS?

Ask for maintenance and reseal history first; a hammer with documented annual teardowns is worth more than one with none. Check the lower bushing for play against the tool shank in more than one direction, since excess play means it's near end of life. Look at the tie rods and housing seams for weeping oil, which points to tired seals, and check the tool tip and shank for mushrooming or heat discoloration suggesting a history of blank firing or running too hot. Confirm the mounting bracket's pin spacing and bushing diameter actually match your carrier, since this generation predates today's more standardized bracket kits and fitment isn't guaranteed across carrier updates. If possible, mount it and run it on a compatible excavator before buying; a seller who won't allow a test run is a red flag.

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

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