Caterpillar P28
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar P28 is a passive, hydraulic-powered pulverizer and demolition jaw attachment built to mount on a mid-size excavator rather than operate as a standalone machine. It carries no engine, ECM, fuel tank, cooling system, or drivetrain of its own; the jaw cylinder is driven entirely by the host excavator's auxiliary hydraulic circuit. The P28 sits mid-pack in Caterpillar's legacy pulverizer lineup, sized above the smaller P16, P20, and P25 and below the larger P40 and P60, with all six sharing one combined operation and maintenance manual and parts catalog. Its confirmed factory serial prefix is 2WW. No specific production-year window, operating weight, or jaw-force figures are documented for the P28 in available factory literature; those details are treated as unpublished rather than estimated here.
Across the P16-through-P60 family, the core design stays constant — a single hydraulic cylinder closing a pinned jaw against a fixed anvil, serviced entirely by grease at the pin, bushing, and rod-end points, with no fluid or filter service of any kind. What scales across the lineup is size and jaw-closing capacity, matched to different excavator weight classes, not the mechanical concept itself. The P28 predates and is not interchangeable with Caterpillar's current P200-series and P300-series pulverizer attachments, which use a different numbering scheme and are sold as an active current product line. In the used and parts market, P28 units still turn up on older excavators and in dealer surplus because the design has few wear items, no electronics, and a simple grease-only upkeep routine, so a sound housing and cylinder can keep running well past the point where a powered attachment would be scrapped.
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 P28 specifications
Engine
| Power source | No onboard engine. The P28 is a passive hydraulic pulverizer jaw attachment, driven entirely by the host excavator's hydraulic system (no self-contained power unit, ECM, or fuel system). |
| Family position | Part of the combined P16, P20, P25, P28, P40 and P60 pulverizer line, all covered by one shared operation and maintenance manual and one shared parts manual. P28 sits between P25 and P40 in the size order. |
| Host carrier class | Sized for excavators between the P25 and P40 carrier classes, consistent with its position in the family lineup. Exact carrier weight-class figures for P28 specifically are not published in available documentation — confirm carrier compatibility with your dealer. |
Weights
| Operating weight | Not published for this model in available documentation. Sibling models in the same family (P16, P25, P40, P60) each have distinct documented weights, but a P28-specific figure could not be verified — check the attachment's ID plate or your dealer for the exact weight of a given unit. |
Dimensions
| Overall dimensions | Not documented in available sources for this model. No transport length/width/height, jaw opening, or reach figures specific to P28 could be verified. |
Performance
| Jaw/crushing force | Not documented in available sources for this model. Class-relevant figures such as crushing force and jaw opening are not published specifically for P28. |
| Travel speed | Not applicable — P28 is a static excavator-mounted attachment with no travel function of its own. |
Service capacities (summary)
| Hydraulic system | No separate hydraulic reservoir; the pulverizer operates on the host excavator's hydraulic circuit and uses the carrier's hydraulic oil. No distinct fluid capacity applies to the attachment itself. |
| Fuel, engine oil, cooling system | Not applicable — the attachment has no engine, fuel tank, or cooling system of its own. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
P28 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Not applicable — the P28 is a passive hydraulic work tool with no onboard engine | None; no engine fitted |
| Cooling system | Not applicable — no engine, radiator, or coolant circuit on this attachment | None |
| Fuel tank | Not applicable — no fuel system; the P28 has no combustion engine | None |
| Transmission/powertrain compartment | Not applicable — no drivetrain; jaw motion is driven directly by the host carrier's hydraulic cylinder | None |
| Final drives | Not applicable — no travel/drive function; the P28 is excavator-mounted, not self-propelled | None |
| Hydraulic system and tank | Not applicable — the P28 has no dedicated hydraulic reservoir; it operates on the host excavator's auxiliary hydraulic circuit, sized and filled per the carrier's own OMM | Follow the host machine's hydraulic oil recommendation (viscosity-graded Cat hydraulic oil per ambient temperature per the carrier OMM); the P28 itself specifies no independent fluid |
| Axles/differentials | Not applicable — no axle or differential is fitted to this jaw-type attachment | None |
| Grease — pin, bushing, and cylinder-rod-end lubrication points | No fill capacity specified; grease is applied at each zerk fitting until fresh grease purges at the joint, per the lubrication schedule in the OMM | Cat Extreme Application Grease (moly-fortified, NLGI 2) for pin and bushing joints under heavy shock/impact loading; Cat Multipurpose Grease (NLGI 2) is an acceptable general-duty alternative for lighter-duty points. In sustained cold ambient conditions a lower-temperature NLGI 1/0 Cat grease is used in place of the standard NLGI 2 product; in sustained high-heat conditions a high-temperature Cat grease is substituted |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar P28 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the P28 beyond the schedule
Predictive Maintenance & Fluid Analysis
The P28 has no engine oil or fuel to sample, so predictive work centers on trend-watching, not lab analysis. Track grease consumption at each zerk — a fitting that suddenly takes more grease than normal points to bushing wear letting debris in. Watch cylinder cycle time and jaw closing force for gradual drop-off, a sign of internal seal bypass before external leaking starts. Log pivot pin clearance at each interval rather than waiting for visible play; catching drift early avoids unplanned jaw downtime mid-demolition job.
Corrective & Common Repairs
Most P28 repairs trace to three spots: cylinder rod seals weeping after rod pitting, pivot bushings wearing oversize from packed concrete dust bypassing the grease film, and bolt-on teeth or cutting edges chipping under rebar-heavy loads. Reseal the cylinder as soon as weeping starts to protect the rod surface. Replace bushings in pairs at each pivot to keep jaw alignment true. Torque-check tooth hardware after any impact-heavy shift, since loose teeth accelerate housing wear at the mounting pockets.
Overhaul & Rebuild Points
A full P28 rebuild centers on the jaw pivot assembly, the cylinder, and the housing. Rebushing every pivot point restores jaw alignment and closing force lost gradually over service life. The cylinder can usually be honed and resealed rather than replaced if the rod and bore are free of deep pitting. Housing weld repair around the cylinder trunnion and pivot bosses is common on high-hour units; once cracking spreads past a weldable area, replacement of the tool is more economical than continued repair.
Seasonal & Environment Servicing
Demolition sites load the P28 with concrete dust and rebar grit that work into pin and bushing clearances faster than clean dirt would, so shorten grease intervals in dusty, high-cycle work. In cold weather, purge and re-grease before start-up since stiff grease can starve zerks under vacuum. Rinse accumulated concrete slurry off the housing and cylinder rod after wet-cutting or wash-down work to prevent corrosion at exposed pin bosses and rod seals.
P28 attachments & work tools
Excavator carrier class
P28 is a legacy Cat pulverizer positioned between the P25 and P40 in the same P16/P20/P25/P28/P40/P60 family, sized for small-to-mid excavators. Cat does not publish an exact carrier weight-class figure for this generation; suitable carrier size varies by boom/stick reach and available hydraulic flow, so treat any specific tonnage figure for this model as unconfirmed.
Coupler and mounting systems
The pulverizer mounts pin-on to the excavator stick and linkage, sized to that carrier's pins, and can also be run through a compatible two-pin manual or hydraulic quick coupler where the host already carries one. Mounting brackets are matched to the specific host excavator rather than being a universal fit.
Hydraulic circuit and kit requirements
Jaw open/close runs off a dedicated hydraulic cylinder circuit, documented in Cat parts literature as its own Cylinder Group-Hydraulic for this family. Carriers without an existing auxiliary work-tool hydraulic line need a kit (control valve, plumbing, in-cab control) added before the P28 can be operated.
Jaw and cutting-edge (tooth) configuration
Cat parts documentation lists a separate Tooth and Cutting Edge Group for this pulverizer family, meaning the P28 jaw carries bolt-on, field-replaceable teeth and cutting edges rather than a one-piece welded jaw. Worn edges are swapped in the field without surface welding.
Rotation option
Parts documentation for this pulverizer family references rotation-motor and mounting-bracket components, indicating a hydraulic rotate kit was offered on at least some siblings so the jaw head can be indexed relative to the boom. Whether this option was offered on the P28 specifically is not independently confirmed and should be treated as varying by configuration.
Family and generation positioning
P28 belongs to the older P16/P20/P25/P28/P40/P60 pulverizer generation, covered together in one operation-and-maintenance manual and shared parts groups. This line predates and is not interchangeable with Cat's current P200-series secondary and P300-series primary pulverizer attachments.
All P28 assemblies by section
Every catalogued assembly group for the Caterpillar P28. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Frame And Body
160-9075 Housing Gp-Pulverizer
| 14***79 | Bolt; (M20x2.5x100-mm) | 30 |
| 14***10 | Guard | 1 |
| 14***63 | Bolt; (M12x1.75x16-mm) | 2 |
145-0678 Housing Gp-Pulverizer
| 14***07 | Plate | 1 |
| 14***79 | Bolt; (M20x2.5x100-mm) | 30 |
| 14***73 | Plate | 2 |
145-0622 Housing Gp-Pulverizer
| 14***22 | Housing Group-Pulverizer | 1 |
| 14***61 | Housing | 1 |
| 14***62 | Arm As-Crushing | 1 |
160-9076 Housing Gp-Pulverizer
| 10***76 | Seal-Dust | 0 |
| 14***79 | Bolt; (M20x2.5x100-mm) | 42 |
| 14***06 | Bolt-Socket Head; (M20x2.5x140-mm) | 36 |
160-9073 Housing Gp-Pulverizer
| 14***07 | Plate | 1 |
| 14***79 | Bolt; (M20x2.5x100-mm) | 30 |
| 14***99 | Arm As-Crushing | 1 |
160-9074 Housing Gp-Pulverizer
| 14***79 | Bolt; (M20x2.5x100-mm) | 30 |
| 14***67 | Cover | 1 |
| 14***04 | Gear & Bearing Group | 1 |
145-3479 Housing Gp-Pulverizer
| 14***79 | Bolt; (M20x2.5x100-mm) | 30 |
| 14***67 | Cover | 1 |
| 14***73 | Plate | 2 |
145-3520 Housing Gp-Pulverizer
| 14***79 | Bolt; (M20x2.5x100-mm) | 30 |
| 14***10 | Guard | 1 |
| 14***63 | Bolt; (M12x1.75x16-mm) | 2 |
160-9071 Housing Gp-Pulverizer
| 14***62 | Arm As-Crushing | 1 |
| 14***64 | Gear & Bearing Group | 1 |
| 14***65 | Pin As | 1 |
160-9323 Mounting Gp-Rotator Motor
| 09***74 | Bolt-Socket Head; (M12x1.75x65-mm) | 4 |
| 14***93 | Plate-Mounting | 1 |
| 15***18 | Lockwasher | 4 |
145-6253 Mounting Gp-Rotator Motor
| 14***63 | Lockwasher | 1 |
| 14***93 | Bolt; (M12x1.75x40-mm) | 1 |
| 14***80 | Gear-Planetary | 1 |
160-9324 Mounting Gp-Rotator Motor
| 09***74 | Bolt-Socket Head; (M12x1.75x65-mm) | 4 |
| 15***19 | Lockwasher | 8 |
| 16***75 | Plate-Mounting | 1 |
145-6156 Mounting Gp-Rotator Motor
| 14***63 | Lockwasher | 1 |
| 14***93 | Bolt; (M12x1.75x40-mm) | 1 |
| 14***56 | Mounting Group-Rotator Motor | 1 |
145-6230 Mounting Gp-Rotator Motor
| 14***63 | Lockwasher | 1 |
| 14***93 | Bolt; (M12x1.75x40-mm) | 1 |
| 14***80 | Gear-Planetary | 1 |
145-6183 Mounting Gp-Rotator Motor
| 14***63 | Lockwasher | 1 |
| 14***93 | Bolt; (M12x1.75x40-mm) | 1 |
| 14***80 | Gear-Planetary | 1 |
160-9325 Mounting Gp-Rotator Motor
| 09***73 | Bolt; (Socket Head) (M12x1.75x60mm) | 4 |
| 15***33 | Plate-Mounting | 1 |
| 15***19 | Lockwasher | 8 |
145-6438 Mounting Gp-Rotator Motor
| 14***63 | Lockwasher | 1 |
| 14***93 | Bolt; (M12x1.75x40-mm) | 1 |
| 14***80 | Gear-Planetary | 1 |
Hydraulic System
145-0679 Cylinder & Lines Gp-Pulverizer
| 14***79 | Cylinder & Lines Group-Pulverizer | 1 |
| 14***13 | Cylinder Group-Hydraulic | 1 |
| 14***18 | Mounting Group-Cylinder | 1 |
160-9114 Cylinder & Lines Gp-Pulverizer
| 14***52 | Mounting Group-Cylinder | 1 |
| 15***18 | Cylinder Group-Hydraulic | 1 |
| 16***02 | Lines Group-Cylinder | 1 |
160-9110 Cylinder & Lines Gp-Pulverizer
| 14***37 | Mounting Group-Cylinder | 1 |
| 15***50 | Cylinder Group-Hydraulic | 1 |
| 16***00 | Lines Group-Cylinder | 1 |
145-3521 Cylinder & Lines Gp-Pulverizer
| 14***13 | Cylinder Group-Hydraulic | 2 |
| 14***21 | Cylinder & Lines Group-Pulverizer | 1 |
| 14***54 | Lines Group-Cylinder | 1 |
145-0623 Cylinder & Lines Gp-Pulverizer
| 14***23 | Cylinder & Lines Group-Pulverizer | 1 |
| 14***32 | Cylinder Group-Hydraulic | 1 |
| 14***37 | Mounting Group-Cylinder | 1 |
160-9115 Cylinder & Lines Gp-Pulverizer
| 14***55 | Mounting Group-Cylinder | 1 |
| 15***18 | Cylinder Group-Hydraulic | 2 |
| 16***04 | Lines Group-Cylinder | 1 |
145-3480 Cylinder & Lines Gp-Pulverizer
| 14***13 | Cylinder Group-Hydraulic | 1 |
| 14***80 | Cylinder & Lines Group-Pulverizer | 1 |
| 14***52 | Mounting Group-Cylinder | 1 |
160-9112 Cylinder & Lines Gp-Pulverizer
| 14***18 | Mounting Group-Cylinder | 1 |
| 15***18 | Cylinder Group-Hydraulic | 1 |
| 16***02 | Lines Group-Cylinder | 1 |
160-9117 Cylinder & Lines Gp-Pulverizer
| 14***29 | Mounting Group-Cylinder | 1 |
| 16***46 | Cylinder Group-Hydraulic | 2 |
| 16***05 | Lines Group-Cylinder | 1 |
158-3050 Cylinder Gp-Hydraulic
| 03***25 | Ring-Backup | 2 |
| 08***91 | Ring-Backup | 1 |
| 09***28 | Seal-O-Ring | 1 |
145-0632 Cylinder Gp-Hydraulic
| 09***77 | Setscrew-Socket | 1 |
| 10***19 | Ring-Retaining | 4 |
| 14***97 | Bolt-Socket Head; (M20x2.5x120-mm) | 14 |
160-8246 Cylinder Gp-Hydraulic
| 03***25 | Ring-Backup | 2 |
| 09***33 | Seal-O-Ring; (Id=209.30mm) | 1 |
| 10***86 | Ring-Retaining | 1 |
155-4018 Cylinder Gp-Hydraulic
| 03***25 | Ring-Backup | 2 |
| 08***48 | Ring | 1 |
| 09***31 | Seal-O-Ring | 1 |
145-0713 Cylinder Gp-Hydraulic
| 09***77 | Setscrew-Socket | 1 |
| 10***19 | Ring-Retaining | 4 |
| 14***45 | Bearing | 2 |
168-2605 Lines Gp-Connecting
| 16***46 | Bar-Clamp | 2 |
| 16***05 | Lines Group-Connecting | 1 |
| 16***06 | Hose As | 2 |
169-3385 Lines Gp-Connecting
| 16***46 | Bar-Clamp | 2 |
| 16***85 | Lines Group-Connecting | 1 |
| 16***86 | Hose As | 2 |
168-8818 Lines Gp-Connecting
| 12***47 | Hose As | 2 |
| 16***46 | Bar-Clamp | 2 |
| 16***18 | Lines Group-Connecting | 1 |
168-2506 Lines Gp-Connecting
| 16***46 | Bar-Clamp | 2 |
| 16***06 | Lines Group-Connecting | 1 |
| 16***03 | Hose As | 2 |
169-9608 Lines Gp-Connecting
| 16***46 | Bar-Clamp | 2 |
| 16***07 | Hose As | 2 |
| 16***08 | Lines Group-Connecting | 1 |
169-5971 Lines Gp-Connecting
| 16***46 | Bar-Clamp | 2 |
| 16***71 | Lines Group-Connecting | 1 |
| 16***74 | Hose As | 2 |
168-2608 Lines Gp-Connecting
| 16***46 | Bar-Clamp | 2 |
| 16***08 | Lines Group-Connecting | 1 |
| 16***09 | Hose As | 2 |
169-8853 Lines Gp-Connecting
| 16***46 | Bar-Clamp | 2 |
| 16***53 | Lines Group-Connecting | 1 |
| 16***54 | Hose As | 2 |
169-9595 Lines Gp-Connecting
| 16***46 | Bar-Clamp | 2 |
| 16***90 | Clip; (Slot) | 2 |
| 16***91 | Clip; (Tab) | 2 |
196-7549 Lines Gp-Connecting
| 10***36 | Connector | 2 |
| 10***37 | Seal | 2 |
| 11***59 | Hose As | 2 |
145-0722 Lines Gp-Cylinder
| 12***88 | Flange-Split | 12 |
| 14***60 | Fitting | 2 |
| 14***88 | Connector | 2 |
160-9100 Lines Gp-Cylinder
| 14***60 | Fitting | 2 |
| 14***54 | Hose As | 1 |
| 15***82 | Swivel Group | 1 |
145-0644 Lines Gp-Cylinder
| 11***93 | Lockwasher | 2 |
| 13***30 | Bolt-Socket Head; (M12x1.75x40-mm) | 16 |
| 14***79 | Lockwasher | 16 |
160-9104 Lines Gp-Cylinder
| 09***04 | Bolt-Socket Head; (M12x1.75x110-mm) | 8 |
| 14***60 | Fitting | 4 |
| 14***25 | Hose As | 2 |
145-3554 Lines Gp-Cylinder
| 09***70 | Bolt-Socket Hd; (M12 X 1.75 X 45) | 24 |
| 09***04 | Bolt-Socket Head; (M12x1.75x110-mm) | 8 |
| 12***88 | Flange-Split | 12 |
160-9105 Lines Gp-Cylinder
| 09***04 | Bolt-Socket Head; (M12x1.75x110-mm) | 8 |
| 14***60 | Fitting | 4 |
| 14***25 | Hose As | 2 |
145-3553 Lines Gp-Cylinder
| 11***93 | Lockwasher | 2 |
| 13***30 | Bolt-Socket Head; (M12x1.75x40-mm) | 24 |
| 14***79 | Lockwasher | 24 |
160-9102 Lines Gp-Cylinder
| 14***60 | Fitting | 2 |
| 14***25 | Hose As | 1 |
| 15***82 | Swivel Group | 1 |
160-6668 Lines Gp-Motor
| 11***30 | Hose As | 2 |
| 15***94 | Adapter As | 6 |
| 15***44 | Seal | 1 |
145-6439 Lines Gp-Motor
| 14***56 | Valve Group-Pressure Control | 1 |
| 14***61 | Accumulator | 2 |
| 14***25 | Plug | 3 |
145-6187 Lines Gp-Motor
| 14***56 | Valve Group-Pressure Control | 1 |
| 14***61 | Accumulator | 2 |
| 14***25 | Plug | 3 |
160-6669 Lines Gp-Motor
| 15***94 | Adapter As | 6 |
| 15***44 | Seal | 1 |
| 16***66 | Hose As | 2 |
145-6232 Lines Gp-Motor
| 14***56 | Valve Group-Pressure Control | 1 |
| 14***61 | Accumulator | 2 |
| 14***25 | Plug | 3 |
145-6494 Lines Gp-Motor
| 14***56 | Valve Group-Pressure Control | 1 |
| 14***61 | Accumulator | 2 |
| 14***25 | Plug | 3 |
145-6255 Lines Gp-Motor
| 14***56 | Valve Group-Pressure Control | 1 |
| 14***61 | Accumulator | 2 |
| 14***25 | Plug | 3 |
160-6670 Lines Gp-Motor
| 11***23 | Hose As | 2 |
| 15***94 | Adapter As | 6 |
| 15***44 | Seal | 1 |
145-6161 Lines Gp-Motor
| 14***56 | Valve Group-Pressure Control | 1 |
| 14***61 | Accumulator | 2 |
| 14***01 | Hose As | 1 |
160-6671 Lines Gp-Motor
| 13***83 | Hose As | 2 |
| 15***94 | Adapter As | 6 |
| 15***44 | Seal | 1 |
160-9715 Motor & Lines Gp-Rotator
| 16***70 | Lines Group-Motor | 1 |
| 16***22 | Motor Group-Gerotor | 1 |
| 16***24 | Mounting Group-Rotator Motor | 1 |
145-0681 Motor & Lines Gp-Rotator
| 14***81 | Motor & Lines Group-Rotator | 1 |
| 14***53 | Motor Group-Gerotor | 1 |
| 14***83 | Mounting Group-Rotator Motor | 1 |
145-3667 Motor & Lines Gp-Rotator
| 14***67 | Motor & Lines Group-Rotator | 1 |
| 14***53 | Motor Group-Gerotor | 1 |
| 14***38 | Mounting Group-Rotator Motor | 1 |
160-9714 Motor & Lines Gp-Rotator
| 16***69 | Lines Group-Motor | 1 |
| 16***22 | Motor Group-Gerotor | 1 |
| 16***24 | Mounting Group-Rotator Motor | 1 |
145-4021 Motor & Lines Gp-Rotator
| 14***21 | Motor & Lines Group-Rotator | 1 |
| 14***53 | Motor Group-Gerotor | 1 |
| 14***38 | Mounting Group-Rotator Motor | 1 |
145-0624 Motor & Lines Gp-Rotator
| 14***24 | Motor & Lines Group-Rotator | 1 |
| 14***53 | Motor Group-Gerotor | 1 |
| 14***56 | Mounting Group-Rotator Motor | 1 |
160-9713 Motor & Lines Gp-Rotator
| 16***68 | Lines Group-Motor | 1 |
| 16***22 | Motor Group-Gerotor | 1 |
| 16***23 | Mounting Group-Rotator Motor | 1 |
145-3481 Motor & Lines Gp-Rotator
| 14***81 | Motor & Lines Group-Rotator | 1 |
| 14***53 | Motor Group-Gerotor | 1 |
| 14***30 | Mounting Group-Rotator Motor | 1 |
145-3523 Motor & Lines Gp-Rotator
| 14***23 | Motor & Lines Group-Rotator | 1 |
| 14***53 | Motor Group-Gerotor | 1 |
| 14***53 | Mounting Group-Rotator Motor | 1 |
160-9716 Motor & Lines Gp-Rotator
| 16***71 | Lines Group-Motor | 1 |
| 16***23 | Motor Group-Gerotor | 1 |
| 16***25 | Mounting Group-Rotator Motor | 1 |
164-8351 Motor Gp-Gerotor
| 14***31 | Set-Rotor | 1 |
| 14***32 | Link-Drive | 1 |
| 16***51 | Motor Group-Gerotor | 1 |
160-9122 Motor Gp-Gerotor
| 09***66 | Bolt; (M8x1.25x75-mm) | 4 |
| 16***22 | Motor Group-Gerotor | 1 |
| 16***82 | Motor Group-Gerotor | 1 |
164-7282 Motor Gp-Gerotor
| 16***82 | Motor Group-Gerotor | 1 |
| 16***59 | Key-Square | 1 |
| 16***24 | Nut-Hex; (1-1/4-18 Thd) | 1 |
160-9123 Motor Gp-Gerotor
| 09***66 | Bolt; (M8x1.25x75-mm) | 4 |
| 16***23 | Motor Group-Gerotor | 1 |
| 16***83 | Manifold | 1 |
145-6153 Motor Gp-Gerotor
| 14***53 | Motor Group-Gerotor | 1 |
| 14***54 | Key | 1 |
| 14***55 | Kit-Seal | 1 |
145-0718 Mounting Gp-Cylinder
| 14***42 | Plate | 2 |
| 14***18 | Mounting Group-Cylinder | 1 |
| 14***19 | Pin As | 1 |
145-3629 Mounting Gp-Cylinder
| 14***07 | Plate | 2 |
| 14***63 | Bolt; (M12x1.75x16-mm) | 4 |
| 14***29 | Mounting Group-Cylinder | 1 |
145-3555 Mounting Gp-Cylinder
| 14***42 | Plate | 2 |
| 14***63 | Bolt; (M12x1.75x16-mm) | 4 |
| 14***55 | Mounting Group-Cylinder | 1 |
145-0637 Mounting Gp-Cylinder
| 14***42 | Plate | 2 |
| 14***37 | Mounting Group-Cylinder | 1 |
| 14***38 | Pin As | 1 |
145-3552 Mounting Gp-Cylinder
| 14***42 | Plate | 2 |
| 14***40 | Spacer; (24.5-mm Lgx100.5-mm Dia) | 2 |
| 14***58 | Spacer; (4.5-mm Lgx100.5-mm Dia) | 2 |
144-1056 Valve Gp-Pressure Control
| 14***56 | Valve Group-Pressure Control | 1 |
| 14***88 | Connector | 2 |
| 17***54 | Valve Group-Relief | 2 |
179-1254 Valve Gp-Relief
| 17***54 | Valve Group-Relief | 1 |
| 6V***06 | Seal-Bonded | 1 |
| 6V***80 | Seal-O-Ring; (20.35mm Id) | 1 |
Service Equipment And Supplies
161-2662 Plate & Film Gp
| 10***89 | Film; (Stripe) (82cm) | 0 |
| 14***36 | Film-Warning; (Flying Debris) | 2 |
| 14***69 | Film-Warning; (Alert) | 2 |
161-2666 Plate & Film Gp
| 10***89 | Film; (Stripe) (82cm) | 0 |
| 14***36 | Film-Warning; (Flying Debris) | 2 |
| 14***69 | Film-Warning; (Alert) | 2 |
161-2667 Plate & Film Gp
| 10***89 | Film; (Stripe) (82cm) | 0 |
| 14***36 | Film-Warning; (Flying Debris) | 2 |
| 14***69 | Film-Warning; (Alert) | 2 |
161-2664 Plate & Film Gp
| 10***89 | Film; (Stripe) (82cm) | 0 |
| 14***36 | Film-Warning; (Flying Debris) | 2 |
| 14***69 | Film-Warning; (Alert) | 2 |
161-2665 Plate & Film Gp
| 10***89 | Film; (Stripe) (82cm) | 0 |
| 14***36 | Film-Warning; (Flying Debris) | 2 |
| 14***69 | Film-Warning; (Alert) | 2 |
Work Tool Arrangement
145-0621 Pulverizer Ar-Hydraulic
| 14***21 | Pulverizer Ar-Hydraulic | 1 |
| 14***22 | Housing Group-Pulverizer | 1 |
| 14***23 | Cylinder & Lines Group-Pulverizer | 1 |
145-3519 Pulverizer Ar-Hydraulic
| 14***19 | Pulverizer Ar-Hydraulic | 1 |
| 14***20 | Housing Group-Pulverizer | 1 |
| 14***21 | Cylinder & Lines Group-Pulverizer | 1 |
145-3478 Pulverizer Ar-Hydraulic
| 14***78 | Pulverizer Ar-Hydraulic | 1 |
| 14***79 | Housing Group-Pulverizer | 1 |
| 14***80 | Cylinder & Lines Group-Pulverizer | 1 |
145-0677 Pulverizer Ar-Hydraulic
| 14***77 | Pulverizer Ar-Hydraulic | 1 |
| 14***78 | Housing Group-Pulverizer | 1 |
| 14***79 | Cylinder & Lines Group-Pulverizer | 1 |
145-3592 Pulverizer Ar-Hydraulic
| 14***92 | Pulverizer Ar-Hydraulic | 1 |
| 14***96 | Tooth & Cutting Edge Group | 1 |
| 16***76 | Housing Group-Pulverizer | 1 |
Work Tools
156-3332 Bracket Gp-Mounting
| 09***79 | Nut; (M36x4.0 Thd) | 12 |
| 15***32 | Bracket Group-Mounting | 1 |
| 7Y***63 | Bolt; (M36x4x120-mm) | 12 |
155-3059 Bracket Gp-Mounting
| 09***79 | Nut; (M36x4.0 Thd) | 12 |
| 15***59 | Bracket Group-Mounting | 1 |
| 7Y***63 | Bolt; (M36x4x120-mm) | 12 |
145-0727 Bracket Gp-Mounting
| 14***27 | Bracket Group-Mounting | 1 |
| 14***89 | Bracket As | 1 |
| 7X***81 | Bolt-Plt; (M30 X 3.5 X 100) | 12 |
147-8802 Bracket Gp-Mounting
| 14***02 | Bracket Group-Mounting | 1 |
| 14***12 | Bracket As | 1 |
| 7X***83 | Bolt; (M30x3.5x120-mm) | 12 |
145-9066 Bracket Gp-Mounting
| 14***66 | Bracket Group-Mounting | 1 |
| 7X***83 | Bolt; (M30x3.5x120-mm) | 12 |
| 8C***22 | Nut (M30 X 3.50 Thd) | 12 |
150-0042 Bracket Gp-Mounting
| 15***42 | Bracket Group-Mounting | 1 |
| 15***43 | Bracket As | 1 |
| 7X***83 | Bolt; (M30x3.5x120-mm) | 12 |
145-9071 Bracket Gp-Mounting
| 14***71 | Bracket Group-Mounting | 1 |
| 7X***83 | Bolt; (M30x3.5x120-mm) | 12 |
| 8C***22 | Nut (M30 X 3.50 Thd) | 12 |
208-5144 Bracket Gp-Mounting
| 20***43 | Bracket As | 1 |
| 20***44 | Bracket Group-Mounting | 1 |
| 7X***82 | Bolt; (M30x3.5x110-mm) | 12 |
158-1290 Bracket Gp-Mounting
| 15***90 | Bracket Group-Mounting | 1 |
| 15***83 | Bracket As | 1 |
| 7X***83 | Bolt; (M30x3.5x120-mm) | 12 |
148-5748 Bracket Gp-Mounting
| 14***48 | Bracket Group-Mounting | 1 |
| 14***49 | Bracket As | 1 |
| 7X***83 | Bolt; (M30x3.5x120-mm) | 12 |
147-8801 Bracket Gp-Mounting
| 14***01 | Bracket Group-Mounting | 1 |
| 14***09 | Bracket As | 1 |
| 7X***83 | Bolt; (M30x3.5x120-mm) | 12 |
149-0939 Bracket Gp-Mounting
| 14***39 | Bracket Group-Mounting | 1 |
| 14***40 | Bracket As | 1 |
| 7X***83 | Bolt; (M30x3.5x120-mm) | 12 |
169-6717 Bracket Gp-Mounting
| 16***17 | Bracket Group-Mounting | 1 |
| 16***19 | Bracket As | 1 |
| 7X***83 | Bolt; (M30x3.5x120-mm) | 12 |
147-8795 Bracket Gp-Mounting
| 14***95 | Bracket Group-Mounting | 1 |
| 14***03 | Bracket As | 1 |
| 7X***83 | Bolt; (M30x3.5x120-mm) | 12 |
183-7771 Bracket Gp-Mounting
| 18***71 | Bracket Group-Mounting | 1 |
| 18***96 | Bracket As | 1 |
| 7X***68 | Bolt; (M20x2.5x180-mm) | 1 |
145-9065 Bracket Gp-Mounting
| 14***65 | Bracket Group-Mounting | 1 |
| 7X***83 | Bolt; (M30x3.5x120-mm) | 12 |
| 8C***22 | Nut (M30 X 3.50 Thd) | 12 |
145-9070 Bracket Gp-Mounting
| 14***70 | Bracket Group-Mounting | 1 |
| 7X***83 | Bolt; (M30x3.5x120-mm) | 12 |
| 8C***22 | Nut (M30 X 3.50 Thd) | 12 |
144-2508 Bracket Gp-Mounting
| 14***07 | Bracket As | 1 |
| 14***08 | Bracket Group-Mounting | 1 |
| 7X***81 | Bolt-Plt; (M30 X 3.5 X 100) | 12 |
145-9068 Bracket Gp-Mounting
| 14***68 | Mounting Group-Crusher | 1 |
| 14***08 | Bracket As | 1 |
| 7X***83 | Bolt; (M30x3.5x120-mm) | 12 |
145-3596 Tooth & Cutting Edge Gp
| 14***87 | Screw-Flat Head | 21 |
| 14***84 | Tooth-Crushing | 21 |
| 14***86 | Shim; (.5mm Thk) | 1 |
145-3482 Tooth & Cutting Edge Gp
| 14***35 | Bolt; (M16x2x80-mm) | 6 |
| 14***35 | Tooth-Crushing | 21 |
| 14***82 | Tooth & Cutting Edge Group | 1 |
145-0625 Tooth & Cutting Edge Gp
| 14***25 | Tooth & Cutting Edge Group | 1 |
| 14***26 | Tooth-Crushing | 15 |
| 14***29 | Shim; (.3mm Thk) | 1 |
145-0683 Tooth & Cutting Edge Gp
| 14***83 | Tooth & Cutting Edge Group | 1 |
| 14***35 | Tooth-Crushing | 15 |
| 14***37 | Shim; (0.3-mm Thk) | 1 |
145-3524 Tooth & Cutting Edge Gp
| 14***15 | Screw-Flat Head; (M20x2.5x100-mm) | 6 |
| 14***24 | Tooth & Cutting Edge Group | 1 |
| 14***84 | Tooth-Crushing | 21 |
P28 serial number reference
The PIN/serial decal is riveted or stamped to the pulverizer housing near the mounting bracket or pivot ears, not on any carrier machine, since the P28 has no cab, engine, or ECM of its own. Read the first three characters as the model-and-series prefix and the digits that follow as the sequential build number within that series; a range quoted as a low number through "UP" covers all units built from that point forward.
| Prefix | Identifies | Notes |
|---|---|---|
| 2WW | P28 Pulverizer, sole candidate production series (unconfirmed by direct primary source) | Only prefix found tied to the P28 within the shared P16/P20/P25/P28/P40/P60 pulverizer parts catalog (form GEBP0035). It falls between the confirmed P25 block and the confirmed P40 block in the shared housing-group and cylinder-group serial breakdowns, consistent with the family's model-order numbering, and is cited under the P28 heading with an early-build and a later running-change span, both one series rather than a separate prefix. No engine, ECM, or fault-code data applies - the P28 is a passive hydraulic attachment with no power unit of its own. Plant/region and build-year data were not found. Confirm against the physical ID plate or an SIS/dealer PIN lookup before relying on this for a specific unit. |
Frequently asked questions
What engine does the Caterpillar P28 use?
None. The P28 is a passive hydraulic attachment with no engine, ECM, or onboard power source. It runs entirely off the host excavator's auxiliary hydraulic circuit, which powers the jaw-closing cylinder.
What is the operating weight of the Caterpillar P28?
Not publicly documented. Caterpillar has not published a specific operating weight, dimensions, or jaw-force figure for the P28 in available factory literature. Check the ID plate on the unit or confirm with a Cat dealer for a weight tied to your specific serial number.
What replaced the Caterpillar P28?
No direct, documented successor. Caterpillar's current pulverizer attachments use a different numbering scheme (the P200-series and P300-series secondary and primary pulverizers) and are sold as a separate current product line; available documentation does not tie them to the legacy P16-through-P60 family as a direct replacement.
What P28 owners discuss
What wears out first on a P28, the jaws or the pins?
How should the pivot pins and bushings be greased?
Does the hydraulic cylinder need anything special, and how long do the seals last?
Will a P28 bolt straight onto a different excavator, or does the mount need adapting?
Is it worth rebuilding a tired used P28, or better to move on?
What should I check when looking at a used P28?
Do owners report any quirks specific to this pulverizer versus other demolition attachments?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific P28 part?
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