Caterpillarwork toolpulverizer

Caterpillar P235

Maintenance schedule, common problems & OEM parts breakdown

The Caterpillar P235 is the largest model in Cat's original P200-series secondary concrete pulverizers, a pin-on hydro-mechanical demolition jaw built to mount on the stick of a large hydraulic excavator rather than run under its own power. It carries no engine, ECM, or hydraulic reservoir of its own - the jaw's open/close cylinder draws entirely off the host excavator's auxiliary high-pressure circuit. Factory literature dates the P235 to around 2010, alongside its smaller P215 and P225 siblings, and dealer data continues to show it in the lineup through the 2017-2023 model years. Operating weight runs about 3.42 t (7,542 lb), with a jaw opening near 1214 mm (47.8 in) and jaw depth of 1103 mm (43.4 in), sized for excavators in the roughly 35-60 t class such as Cat's 325, 330, 336, and 345/349 series carriers. It mounts via a dedicated bracket or a Pin Grabber-style/CW quick coupler, letting a shop swap it between compatible carriers without repinning.

Across the P200-series lineup the P235 sits above the P225 and P215 mainly by scale - a larger jaw opening and depth, and proportionally higher closing and shear force at the tip and rebar-cutter zones, though exact force figures vary somewhat between the original factory spec sheet and later dealer listings. Caterpillar's current secondary-pulverizer catalog - the P214, P224, P232, and P245 - is a separately numbered, newer generation of tools and should not be treated as a direct P235 replacement; no factory documentation ties the two lines together as predecessor and successor. On the used and parts market that leaves the P235 as a standalone platform: buyers care most about jaw tip and cutting-edge condition, pin and bushing wear at the main pivot and cylinder rod end, and cylinder seal integrity, since those are the parts that wear out and get rebuilt on a working pulverizer. Coupler and mounting-bracket compatibility with the buyer's own excavator fleet is the other main factor driving resale value.

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 P235 specifications

Engine

Power source	No onboard engine. Passive hydraulic work tool — jaw opening/closing is powered entirely by the host excavator's auxiliary high-pressure circuit, controlled from the cab by joystick or pedal.
Carrier compatibility	Stick-mounted on Cat hydraulic excavators in the 35-60 t class; listed factory matches include the 325B/C/D, 329D, 330B/C/D, 336D and 345B/C. Can also be pin-on or quick-coupler mounted to non-Cat carriers of the same weight class with the correct mounting bracket.

Weights

Operating weight (attachment only, excludes mounting bracket)	3421 kg (7542 lb)
Recommended carrier weight (stick-mounted)	35-60 t (77,000-132,300 lb)

Dimensions

Length	3046 mm (120 in)
Height	Approx. 1918-1953 mm (75.5-77 in), varies by series/revision
Width	708 mm (27.8 in)
Jaw depth	1103 mm (43.4 in)
Jaw opening	1214 mm (47.8 in)
Cutter (blade) length	260 mm (10.2 in)
Jaw width, fixed jaw	580 mm (22.8 in)
Jaw width, moving jaw	420 mm (16.5 in)

Performance

Closing force at tooth tip	Approx. 194 t per factory spec sheet; a later dealer listing shows 187 short ton (about 170 t). Figures vary by series/revision.
Closing force at primary cutter (rebar shear)	Approx. 401 t per factory spec sheet; a later dealer listing shows 387 short ton (about 351 t). Figures vary by series/revision.
Time to close jaw	3 sec
Time to open jaw	4.5 sec
Crushing capacity — concrete thickness	Up to 900 mm (35.4 in); actual capability depends on carrier hydraulic performance, rebar content, and jaw/cutter condition.

Service capacities (summary)

Hydraulic circuit	Two-way high-pressure lines for open/close, supplied by the host excavator — no independent hydraulic reservoir on the attachment itself.
Max operating pressure (crushing/cutting)	350 bar (5076 psi)
Optimum flow (crushing/cutting)	300 L/min (79 gpm)
Return flow	510 L/min (135 gpm)
Fuel, engine oil, coolant	Not applicable — passive attachment with no engine; all fluid capacities are the host excavator's.

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

P235 fluids & capacities

System	Capacity	Recommended fluid
Grease points (jaw pivot pins/bushings)	Not specified — apply per interval, avoid over-greasing	Cat Prime Application Grease (NLGI #2, moly-fortified) or Cat Multipurpose Grease

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

Caterpillar P235 maintenance schedule

Service interval	Tasks
Every 50 h	Grease the jaw pivot pin, cylinder rod-end pin, and cutter link pins at the start of every shift (or every 10 hours) with Cat Prime Application Grease NLGI #2 or Cat Multipurpose Grease Visually inspect jaw tips and cutting/shear edges for cracks, chips, or flats before putting the tool to work Check the cylinder rod for scoring and inspect the gland seal for oil weeping Verify all mounting bolts, pins, and retainer plates are tight and retaining clips are in place Confirm the quick-coupler or pin-on mounting is fully engaged and locked before operating Inspect the hydraulic hose kit and fittings for leaks, chafing, or loose connections
Every 250 h	Measure pin and bushing clearance at the main jaw pivot and the cylinder rod-end pin and compare against wear limits Inspect jaw tips and shear edges for wear and rotate or replace bolt-on tips before wear reaches the base casting Check the cylinder for internal leak-down; the jaw should hold position under load without drifting Inspect the mounting bracket ears and stick-pin bosses for elongation, cracking, or repair welds Purge old grease from all pivot points and repack to flush contamination out of the bushings
Every 500 h	Pull the cylinder rod and inspect for scoring, pitting, or bending; replace the rod seal kit if seepage or slow cycle times were noted Inspect the fixed and moving jaw castings for cracks or fatigue, especially around the tip mounting bolts and pivot bosses Check the hydraulic hose kit for age-related cracking, abrasion, and swelling and replace any hose showing surface damage Verify jaw open/close cycle times against factory spec (about 3 sec to close, 4.5 sec to open) as a check on hydraulic circuit health
Every 1,000 h	Pull the jaw pivot pins and bushings for full measurement and replace any pin or bushing outside factory wear tolerance Inspect the cylinder barrel and rod bearing surfaces; overhaul or replace the cylinder if leak-down or scoring persists after a reseal Inspect the coupler wedge/lock mechanism, if quick-coupler mounted, for wear that could let the tool shift under load Touch up or repaint exposed structural steel where coating has worn through, to control corrosion at pin bosses and jaw castings
Every 2,000 h	Run a full structural inspection of the jaw castings, mounting bracket, and stick-pin bosses; dye-penetrant or magnetic-particle check welds and high-stress areas for fatigue cracking Rebuild or replace the main jaw cylinder as a complete unit if seal, rod, or bore wear has progressed past field-repair limits Replace the main pivot pins and bushings as a set if wear has not already forced earlier replacement Recheck jaw geometry (opening and depth) against factory spec to confirm the tool still meets published crushing performance
Every 4,000 h	Complete a full teardown of the jaw assembly, cylinder, and mounting bracket for structural and dimensional inspection Replace or resleeve worn pin bores in the jaw castings and mounting bracket Replace the full jaw tip and cutting-edge set even if not yet worn to base, to restore full crushing and shearing performance Re-torque and re-certify all structural fasteners and pin retainers before returning the tool to service

Servicing the P235 beyond the schedule

Predictive Maintenance & Fluid Analysis

The P235 has no fluid system of its own, so predictive maintenance means watching the host excavator's hydraulic oil and the pulverizer's wear pattern together. Send the carrier's hydraulic oil for particle-count and moisture analysis on the excavator's normal interval - abrasive fines from jaw or pin wear can show up in the return line before a problem is visible at the tool. Track jaw cycle time (factory spec is about 3 sec to close, 4.5 sec to open); a slowing cycle flags pump wear, a restrictive hose kit, or a failing cylinder seal before it becomes a breakdown.

Corrective & Common Repairs

Bolt-on jaw tips and cutting edges are the most common P235 repair, especially on rebar-heavy demolition where tip life can run from a few weeks to a few months depending on material. Replace tips before wear reaches the jaw casting to avoid a structural repair. Cylinder rod-end leaks and a slow-closing jaw point to a worn rod seal or gland - reseal at the first sign of oil weeping rather than waiting for a full loss of crushing force. Running the tool above its rated hydraulic flow is the most common cause of early seal failure.

Overhaul & Rebuild Points

Overhaul on a P235 centers on the main jaw pivot pin and bushing and the cylinder rod-end pin, the two points that take full crushing and shear load on every cycle. Measure clearance regularly and replace pins and bushings as a set once play shows up at the jaw under load. A full cylinder rebuild - new rod, seals, and bore inspection - is due when leak-down or scoring returns after a reseal. Inspect the mounting bracket and stick-pin bosses for elongation or cracking at the same time, since that joint carries the same repeated load.

Seasonal & Environment Servicing

Grease the jaw pivot, cylinder rod-end, and cutter link pins with Cat Prime Application Grease NLGI #2 (or Cat Multipurpose Grease) at the start of every shift, more often on wet, muddy, or abrasive demolition sites where contamination purges bushings faster. Cold weather thickens grease and can slow the jaw cycle until it warms through, so check flow and cycle time before working the tool hard on a cold start. In coastal or wash-down environments, touch up worn paint on the jaw castings and mounting bracket promptly to keep surface corrosion from starting at pin bosses and welds.

P235 attachments & work tools

Host excavator compatibility

P235 mounts to large hydraulic excavators in roughly the 33-50 t class, centered on Cat 336 and 349 series carriers across generations (D, D2, E, F, GC variants). It is the largest member of its pulverizer line, sized for excavators too big for the P215/P225 siblings.

Mounting / coupler system

Pin-on hydro-mechanical work tool fitted with a dedicated mounting bracket; swaps between carriers using Cat's dedicated quick-coupler systems (Pin Grabber-style and CW-dedicated couplers) so the tool can be exchanged with other work tools on the same excavator without repinning.

Jaw / tip configuration

Fixed jaw and moving jaw with an integrated crushing tip section plus a separate rebar-cutter zone nearer the pivot, used to pulverize concrete and shear exposed rebar in one pass. Unlike multi-processor jaw sets, the P235's jaw is not an interchangeable-tip design.

P215/P225/P235 size lineup

P235 is the top model in its family: jaw opening around 1200 mm (47-48 in) versus roughly 1020 mm (40 in) on the P225 and 840 mm (33 in) on the P215, with jaw depth and closing force scaling up the same way. Treat exact force figures as approximate since dealer listings show tip- and rebar-cutter-force numbers that vary somewhat by source.

Hydraulic requirement on host machine

As a hydro-mechanical tool, the P235 is driven by the carrier excavator's auxiliary/attachment hydraulic circuit (boom or stick-mounted cylinder), not by any onboard engine. Cat supplies matched hydraulic hose/plumbing kits keyed to the specific carrier model and serial-prefix configuration; exact flow and pressure targets are set by the carrier's kit, not a fixed P235 spec.

Guarding and factory options

Wear plates and jaw tips are designed to be serviced from ground level, a feature called out across dealer listings for this pulverizer class. Some Cat pulverizer-line literature also markets optional VisionLink asset-tracking, though this has not been confirmed as standard or optional specifically for the P235 unit itself.

All P235 assemblies by section

Every catalogued assembly group for the Caterpillar P235. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Frame And Body

340-2436 Housing Gp-Pulverizer

34***36	Housing Group-Pulverizer	1
34***45	Plate As	1
34***55	Bar	1
34***57	Bar	7

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334-6101 Housing Gp-Pulverizer

33***01	Housing Group-Pulverizer	1
33***11	Plate	1
33***12	Bar	8
33***13	Plate	1

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321-0878 Housing Gp-Pulverizer

32***78	Housing Group-Pulverizer	1
32***83	Plate	1
32***84	Plate	2
32***15	Bar	2

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Hydraulic System

222-8828 Cylinder & Lines Gp-Shear

09***48	Nipple, Grease	1
12***11	Hose As	1
16***16	Seal	1
16***87	Bushing	2

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187-2996 Cylinder & Lines Gp-Shear

09***48	Nipple, Grease	1
14***84	Bolt-Socket Head; (M20x2.5x110-mm)	22
16***16	Seal	1
16***55	Bushing	2

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222-8830 Cylinder & Lines Gp-Shear

09***48	Nipple, Grease	1
09***06	Bolt-Socket Head; (M16x2x80-mm)	24
16***16	Seal	1
16***71	Bushing	2

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321-1277 Cylinder & Valve Gp

14***51	Elbow Group	1
14***92	Elbow; (-12 Orfs/-12 Orfs Swivel)	2
15***46	Seal	1
15***18	Lockwasher	2

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334-6110 Cylinder & Valve Gp

14***51	Elbow Group	1
14***92	Elbow; (-12 Orfs/-12 Orfs Swivel)	2
15***46	Seal	1
15***18	Lockwasher	2

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340-2439 Cylinder & Valve Gp

14***51	Elbow Group	1
14***52	Elbow As.	2
15***18	Lockwasher	2
16***54	Seal	1

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354-6671 Lines Gp-Connecting

17***20	Hose As	2
1P***04	Seal - Rectangular (45mm Dia)	2
1P***67	Flange-Half (43.31 mm Id)	4
35***71	Lines Group-Connecting	1

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357-9482 Lines Gp-Connecting

1P***03	Seal - Rectangular (31.86mm Id)	2
1P***04	Seal - Rectangular (45mm Dia)	2
1P***67	Flange-Half (43.31 mm Id)	4
35***82	Lines Group-Connecting	1

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357-9484 Lines Gp-Connecting

1P***03	Seal - Rectangular (31.86mm Id)	2
1P***04	Seal - Rectangular (45mm Dia)	2
1P***67	Flange-Half (43.31 mm Id)	4
35***84	Lines Group-Connecting	1

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354-6672 Lines Gp-Connecting

1P***04	Seal - Rectangular (45mm Dia)	2
1P***67	Flange-Half (43.31 mm Id)	4
35***72	Lines Group-Connecting	1
35***74	Hose As	2

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357-9490 Lines Gp-Connecting

1P***03	Seal - Rectangular (31.86mm Id)	2
1P***04	Seal - Rectangular (45mm Dia)	2
1P***67	Flange-Half (43.31 mm Id)	4
35***90	Lines Group-Connecting	1

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234-5669 Lines Gp-Connecting

1P***04	Seal - Rectangular (45mm Dia)	2
1P***67	Flange-Half (43.31 mm Id)	4
23***69	Lines Group-Connecting	1
24***71	Hose As	2

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357-9493 Lines Gp-Connecting

1P***03	Seal - Rectangular (31.86mm Id)	2
1P***04	Seal - Rectangular (45mm Dia)	2
1P***67	Flange-Half (43.31 mm Id)	4
35***93	Lines Group-Connecting	1

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354-7379 Lines Gp-Connecting

1P***04	Seal - Rectangular (45mm Dia)	2
1P***67	Flange-Half (43.31 mm Id)	4
23***81	Hose As	2
35***79	Lines Group-Connecting	1

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170-3229 Valve Gp-Speed Control

17***29	Valve Group-Speed Control	1
17***30	Plug	6
17***31	Valve	1
17***32	Plug-Screw	2

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Service Equipment And Supplies

340-2434 Kit-Maintenance

16***18	Shim; (1-mm Thk)	1
16***19	Shim; (1.5-mm Thk)	1
16***92	Wrench	1
17***03	Wrench-T-Handle	1

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334-6100 Kit-Maintenance

16***86	Shim; (1-mm Thk)	1
16***88	Shim; (1.5-mm Thk)	1
17***03	Wrench-T-Handle	1
17***04	Wrench	1

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321-0877 Kit-Maintenance

16***18	Shim; (1-mm Thk)	1
16***19	Shim; (1.5-mm Thk)	1
17***03	Wrench-T-Handle	1
17***38	Wrench	1

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200-2885 Lock Gp-Shear

20***85	Lock Group-Shear	1
20***86	Plate-Lock	2
8T***32	Nut (M16 X 2 Thd); (M16x2.00 Thd)	2
8T***75	Bolt; (M16x2x90-mm)	1

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200-2960 Lock Gp-Shear

20***16	Plate-Lock	2
20***60	Lock Group-Shear	1
8T***32	Nut (M16 X 2 Thd); (M16x2.00 Thd)	2
8T***75	Bolt; (M16x2x90-mm)	1

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200-2959 Lock Gp-Shear

20***14	Plate-Lock	2
20***59	Lock Group-Shear	1
8T***32	Nut (M16 X 2 Thd); (M16x2.00 Thd)	2
8T***75	Bolt; (M16x2x90-mm)	1

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349-6027 Plate & Film Gp

11***73	Seal; (0.5cm) (X2)	0
15***96	Film-Notice; (Lift Eye Location)	5
24***76	Film-Warning; (Do Not Operate, Read Omm)	1
31***21	Film-Warning; (Crush Hazard, Stay Back, Hand), Name-Plate (Reserve Tank Led)	2

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349-6028 Plate & Film Gp

11***73	Seal; (0.5cm) (X2)	0
15***96	Film-Notice; (Lift Eye Location)	5
24***76	Film-Warning; (Do Not Operate, Read Omm)	1
31***21	Film-Warning; (Crush Hazard, Stay Back, Hand), Name-Plate (Reserve Tank Led)	2

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349-6024 Plate & Film Gp

11***73	Seal; (0.5cm) (X2)	0
15***96	Film-Notice; (Lift Eye Location)	5
24***76	Film-Warning; (Do Not Operate, Read Omm)	1
31***21	Film-Warning; (Crush Hazard, Stay Back, Hand), Name-Plate (Reserve Tank Led)	2

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Work Tool Arrangement

349-6026 Pulverizer Ar-Hydraulic

13***55	Setscrew; (M4x0.7x8-mm)	2
32***75	Pulverizer Group-Hydraulic	1
32***77	Kit-Maintenance	1
34***26	Pulverizer Ar-Hydraulic	1

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349-6030 Pulverizer Ar-Hydraulic

13***55	Setscrew; (M4x0.7x8-mm)	2
34***33	Pulverizer Group-Hydraulic	1
34***34	Kit-Maintenance	1
34***28	Plate & Film Group	1

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349-6023 Pulverizer Ar-Hydraulic

13***55	Setscrew; (M4x0.7x8-mm)	2
33***98	Pulverizer Group-Hydraulic	1
33***00	Kit-Maintenance	1
34***23	Pulverizer Ar-Hydraulic	1

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Work Tools

169-4971 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
16***71	Bracket Group-Mounting	1
16***91	Bracket As	1
16***82	Bolt-Socket Head; (M24x3x70-mm)	14

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254-4463 Bracket Gp-Mounting

09***49	Washer; (22x60x6-mm Thk)	1
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
20***71	Washer; (26x90x8-mm Thk)	1
25***63	Bracket Group-Mounting	1

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169-5311 Bracket Gp-Mounting

16***11	Bracket Group-Mounting	1
16***16	Bracket As	1
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
8T***67	Washer-Hard; (26x44x4-mm Thk)	14

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179-1645 Bracket Gp-Mounting

15***18	Lockwasher	8
16***18	Bracket As	1
16***97	Plate-Cover	1
17***45	Bracket Group-Mounting	1

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169-4969 Bracket Gp-Mounting

16***69	Bracket Group-Mounting	1
16***89	Bracket As	1
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
7X***53	Bolt-Plt; (M16 X 2.0 X 40)	2

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234-9927 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
23***27	Bracket Group-Mounting	1
34***39	Bracket Group-Mounting	1

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169-4975 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
16***75	Bracket Group-Mounting	1
16***94	Bracket As	1
16***82	Bolt-Socket Head; (M24x3x70-mm)	14

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276-7982 Bracket Gp-Mounting

16***82	Bolt-Socket Head; (M24x3x70-mm)	14
27***82	Bracket Group-Mounting	1
27***83	Bracket As	1
8T***67	Washer-Hard; (26x44x4-mm Thk)	14

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226-4127 Bracket Gp-Mounting

15***19	Lockwasher	8
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
22***19	Bracket As	1
22***20	Bracket Group-Mounting	1

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255-0001 Bracket Gp-Mounting

169-5308 Bracket Gp-Mounting

16***08	Bracket Group-Mounting	1
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
17***45	Bracket Group-Mounting	1
8T***67	Washer-Hard; (26x44x4-mm Thk)	14

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169-4970 Bracket Gp-Mounting

16***70	Bracket Group-Mounting	1
16***90	Bracket As	1
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
7Y***10	Washer-Special; (17x65x6-mm Thk)	2

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253-7830 Bracket Gp-Mounting

09***49	Washer; (22x60x6-mm Thk)	2
13***55	Setscrew; (M4x0.7x8-mm)	2
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
20***59	Plate-Serial Number	1

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193-4497 Bracket Gp-Mounting

16***82	Bolt-Socket Head; (M24x3x70-mm)	14
19***97	Bracket Group-Mounting	1
20***66	Bracket Group-Mounting	1
8T***67	Washer-Hard; (26x44x4-mm Thk)	14

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169-4974 Bracket Gp-Mounting

16***74	Bracket Group-Mounting	1
16***93	Bracket As	1
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
7X***53	Bolt-Plt; (M16 X 2.0 X 40)	2

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169-4967 Bracket Gp-Mounting

16***67	Bracket Group-Mounting	1
16***86	Bracket As	1
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
5P***76	Washer Guard To Support Assembly And Guard Assembly	2

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248-7980 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
15***21	Lockwasher	2
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
20***59	Plate-Serial Number	1

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169-5307 Bracket Gp-Mounting

16***07	Bracket Group-Mounting	1
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
17***47	Bracket Group-Mounting	1
8T***67	Washer-Hard; (26x44x4-mm Thk)	14

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231-0474 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
15***19	Lockwasher	8
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
22***87	Cover	1

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201-9466 Bracket Gp-Mounting

15***18	Lockwasher	8
16***97	Plate-Cover	1
20***66	Bracket Group-Mounting	1
20***31	Bracket As	1

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299-0293 Bracket Gp-Mounting

13***55	Setscrew; (M4x0.7x8-mm)	2
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
29***93	Bracket Group-Mounting	1
29***94	Bracket As	1

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254-4039 Bracket Gp-Mounting

09***49	Washer; (22x60x6-mm Thk)	1
13***55	Setscrew; (M4x0.7x8-mm)	2
16***82	Bolt-Socket Head; (M24x3x70-mm)	14
20***71	Washer; (26x90x8-mm Thk)	1

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179-1647 Bracket Gp-Mounting

15***18	Lockwasher	8
16***19	Bracket As	1
16***97	Plate-Cover	1
17***47	Bracket Group-Mounting	1

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334-6098 Pulverizer Gp-Hydraulic

11***73	Seal; (0.5cm) (X2)	0
14***98	Screw-Flat Head; (M20x2.5x90-mm)	3
15***21	Lockwasher	4
15***22	Lockwasher	4

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321-0875 Pulverizer Gp-Hydraulic

11***73	Seal; (0.5cm) (X2)	0
14***98	Screw-Flat Head; (M20x2.5x90-mm)	3
15***21	Lockwasher	4
15***22	Lockwasher	4

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340-2433 Pulverizer Gp-Hydraulic

11***73	Seal; (0.5cm) (X2)	0
14***15	Screw-Flat Head; (M20x2.5x100-mm)	3
15***21	Lockwasher	4
15***22	Lockwasher	5

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Frequently asked questions

What powers the Cat P235 pulverizer?

The P235 has no engine of its own. It is a passive hydro-mechanical attachment - the host excavator's hydraulic system supplies the flow and pressure that open and close the jaw. It mounts on excavators in the roughly 35-60 t class, such as Cat's 336 and 349 series, and draws off their auxiliary high-pressure circuit through a matched hose and coupler kit.

What is the P235's operating weight?

About 3.42 t (7,542 lb) for the attachment alone, not counting the mounting bracket. That makes it the heaviest and largest-jawed member of the original P215/P225/P235 pulverizer family.

What replaced the Cat P235?

No factory documentation confirms a direct successor. Caterpillar's current secondary-pulverizer lineup - the P214, P224, P232, and P245 - is a separately numbered, newer generation of tools, not a documented replacement line for the P215/P225/P235 family. Treat the two lineups as distinct rather than assume parts or specs interchange.

What P235 owners discuss

What wears out first on a Cat P235 in daily demolition use?

Jaw tips and the cutting/shear edges go first, especially on rebar-heavy slab work. Field reports on secondary pulverizers this size describe tip life running from a few weeks to a few months depending on how much rebar shearing versus straight concrete pulverizing the jaw is doing. Pin and bushing wear at the main jaw pivot and the cylinder rod-end pin follows next, usually showing up as visible play or a knock when the jaw opens and closes. Have your dealer verify pin and bushing clearances if you notice play under load.

Is a pulverizer like the P235 hard on the excavator's hydraulics or structure?

Owners generally say it's fine on a properly matched carrier but hard on anything outside its rated operating weight and flow range. Running the attachment on a machine sized correctly for it produces normal pin and bushing wear over time and no unusual structural complaints. Feeding it hydraulic flow above its rating blows seals early and stresses the cylinder; feeding it too little flow gives a slow, weak jaw with poor crushing force. Matching the excavator's auxiliary hydraulic output to the pulverizer's spec sheet is the standard advice for avoiding excess wear.

How often do the cylinder seals need attention?

There's no fixed field-reported interval for reseal work on this class of pulverizer. Operators go by symptoms instead: a jaw that closes noticeably slower than it used to, oil seepage at the rod gland, or the jaw losing crushing force under load all point to a seal kit being due. Seal life drops fast when the attachment is run on hydraulic flow higher than it's rated for, so keeping the excavator's auxiliary circuit dialed to the pulverizer's spec is the main thing owners cite for getting full seal life.

Does the P235 need special hoses or a coupler kit to move between excavators?

Yes. The pulverizer is a passive hydro-mechanical tool with no engine or onboard electronics, so everything runs off the host excavator's auxiliary hydraulic circuit. The hose kit and coupler have to match the destination carrier's pin size, flow rating, and coupler type. Shops running the same pulverizer across a mixed excavator fleet keep a dedicated hose and coupler kit sized to each carrier class rather than trying to stretch one kit across machines of different sizes.

Do owners report electrical or sensor problems with the P235?

No. It's a straight hydro-mechanical attachment with no ECM, wiring harness, or sensors of its own, so there's nothing electrical to troubleshoot on the tool itself. When a P235 isn't working, the cause traces back to the excavator's hydraulic circuit - a flow or pressure setting, a sticking auxiliary valve, or a coupler that isn't fully engaged - not anything onboard the attachment.

What's a realistic tip or jaw rebuild interval for this class of pulverizer?

It varies a lot by material. Clean concrete with light rebar stretches tip life out considerably, while heavy rebar-mat demolition or incidental rock contact chews through tips much faster. Shops servicing this size of secondary pulverizer treat tip swaps as routine field maintenance - bolt-on replacement, no welding required - and recommend swapping tips before they wear down to the base, since running past that point starts eating into the jaw casting itself.

What should I check before buying a used P235?

Walk the jaw and look at the tips and cutting edges first for flats, chipping, or metal worn close to the mounting bolts, which signals a rebuild is due. Cycle the jaw open and closed and watch for play at the main pivot pin and the cylinder rod-end pin - noticeable movement there means pins and bushings need replacing. Check the cylinder rod for scoring and look for weeping at the gland seal. Inspect the mounting bracket and ears where the tool pins to the excavator stick for elongation, cracking, or repair welds, since that's a high-stress point on any jaw-type demolition attachment. Have your dealer verify pin/bushing clearances and run a cylinder leak-down check before relying on a used unit structurally.

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

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