Caterpillarwork toolrake-power box

Caterpillar PR190

Maintenance schedule, common problems & OEM parts breakdown

The Caterpillar PR190 is a hydraulic-angle Power Box Rake, a passive work tool built to mount on skid steer loaders, compact track loaders, multi terrain loaders, and compact wheel loaders through the standard Cat universal quick-attach plate. It carries no engine, ECM, cooling system, fuel tank, or onboard hydraulic reservoir of its own; the rotating tine roller and hydraulic angle function draw entirely on the host carrier's auxiliary hydraulic circuit, with an optimal flow of 57-86 L/min (15-23 gpm) at 230 bar (3,336 psi) and, for angle control, the carrier's 14-pin electrical auxiliary connection. Operating weight is 599 kg (1,320 lb), with an overall width of 2515 mm (99 in), roller width of 2286 mm (90 in), length of 1626 mm (64 in), and height of 953 mm (37.5 in). The PR190 is the largest member of Caterpillar's power box rake line, which also includes the PR121, PR172, and PR184; these are size siblings built for the same task, not a generational lineage, so there is no predecessor or successor model to trace.

What separates the PR190 from its smaller siblings is scale and control. The PR172 and PR184 are offered in both manual-angle and hydraulic-angle versions, but the PR190 is sold only as a hydraulic-angle unit, letting the operator sweep the box up to 20 degrees each side from the cab rather than resetting it by hand, a configuration decision that tracks with it being the widest and heaviest rake in the family. Dual independently adjustable gauge wheels and two-position winged endplates that stay parallel through the angling range are standard across the class, carried over onto the PR190 at its larger frame size. In the used and parts market, a wide hydraulic-angle box rake like the PR190 stays in steady demand for site clearing, land development, and real estate/turf prep work, where a single wide pass over de-thatching, grading, leveling, and windrowing debris covers more ground than the smaller PR121/PR172/PR184 units, keeping resale value and replacement-part demand tied closely to rotor, coupler, and hydraulic-wear-component turnover rather than to any engine overhaul cycle.

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 PR190 specifications

Engine

Power source	No onboard engine. Passive work tool driven by hydraulic motors, fed by the host carrier machine's auxiliary hydraulic circuit.
Emissions tier	Not applicable, no onboard engine

Weights

Operating weight	599 kg (1320.6 lb)
Shipping weight	Not separately published; matches operating weight for this attachment class
Ground pressure	Not applicable, carrier-mounted work tool with no ground-bearing undercarriage

Dimensions

Roller width	2286 mm (90 in)
Overall width	2515 mm (99 in)
Overall length	1626 mm (64 in)
Overall height	953 mm (37.5 in)
Raking width at maximum angle (20 degrees)	2159 mm (85 in)
Maximum angle, right or left of center	20 degrees

Performance

Angling control	Hydraulic angling lets the operator set rake angle from the carrier operator compartment, up to 20 degrees right or left of center
Endplates	Two-position winged endplates help contain and windrow collected material for pickup
Gauge wheels	Dual, independently adjustable gauge wheels set working depth
Application use	De-thatching, old lawn and weed removal, grading, leveling, raking, debris removal, and seedbed preparation; used in general construction, trench restoration, golf course construction, and athletic field maintenance
Carrier compatibility	Mounts to Cat skid steer loaders, compact track loaders, multi terrain loaders, and compact wheel loaders equipped with a compatible auxiliary hydraulic circuit, spanning the mid-to-large frame sizes of those lines
Travel speed / drawbar / lift / gradeability	Not applicable; non-self-propelled work tool with no independent travel, drawbar, or lift performance of its own

Service capacities (summary)

Hydraulic flow (optimal)	57-86 L/min (15-23 gpm), supplied by the carrier machine
Hydraulic pressure (optimal)	230 bar (3336 psi), supplied by the carrier machine
Fuel tank	Not applicable, no onboard engine
Engine oil	Not applicable, no onboard engine
Cooling system	Not applicable, no onboard engine

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

PR190 fluids & capacities

System	Capacity	Recommended fluid
Machine type note	n/a	PR190 is a hydraulic angle Power Box Rake, a passive skid-steer/multi-terrain-loader work tool (sibling to PR172 and PR184). It carries no engine, no coolant system, no fuel tank, no onboard hydraulic tank, and no transmission, differential, or final-drive compartments. A standard OMM fluids chart for a self-powered machine does not apply.
Hydraulic system (host-supplied)	No dedicated reservoir on the attachment. Runs on the carrier machine's auxiliary hydraulic circuit at an optimal flow of 57-86 L/min (15-23 US gpm) and optimal pressure of 230 bar (3336 psi)	No independent fluid fill. Use whatever hydraulic oil the host skid-steer/CTL/loader OMM specifies (typically Cat HYDO Advanced or equivalent multiviscosity hydraulic oil, viscosity chosen per host machine's ambient-temperature chart). The rake itself has no fluid spec of its own.
Rotor drive housing	Not published in available documentation for this model. The rotor drive runs in an enclosed housing on the drive side of the roller; fill is to a level/sight plug or grease-gun stroke count, not a large reservoir	Not confirmed for this exact model in available sources - treat as unconfirmed. Comparable Cat enclosed-drive work tools use either a heavy-duty gear or transmission/drive-train oil (Cat TDTO-class) or a semi-fluid NLGI No. 0 gear-case grease, so treat viscosity/product as unresolved. Verify exact spec with a Cat dealer or the printed OMM before service.
Grease points (pivot, angle-adjust linkage, rotor bearings)	No fill volume - lubricated by grease-gun stroke count per the service interval, not a capacity figure	Cat multipurpose grease (Cat MPGM or Cat Advanced 3Moly for higher-load pivot points), applied through the machine's zerk fittings per the OMM's lubrication interval schedule.
Engine crankcase, cooling system, fuel tank, transmission, final drives, axles/differentials	Not applicable	Not applicable - the PR190 has no engine and no powertrain of its own; all motive and hydraulic power comes from the carrier machine.

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

Caterpillar PR190 maintenance schedule

Service interval	Tasks
Every 10 h	Walk around the rake before startup and check for loose, cracked, or missing hardware on the frame and endplates. Inspect hydraulic hoses, fittings, and quick-disconnect couplers for leaks, abrasion, or bulging. Confirm the quick-attach coupler pins and locking levers are fully engaged before raising the rake. Clear wrapped debris, roots, and packed material from the rotor and gauge wheels. Check both gauge wheels turn freely and hold their set depth position.
Every 50 h	Grease the angle-pivot bushings and quick-attach coupler pins per the lubrication chart. Grease the gauge wheel spindles and depth-adjustment linkage. Cycle the hydraulic angle function fully left and right and check for smooth, even travel with no binding. Inspect the rotor drive housing for oil weep, loose fasteners, or abnormal noise under load.
Every 250 h	Inspect rotor teeth or tine edges for wear, chipping, or uneven wear pattern and rotate or replace as needed. Check the hydraulic motor mounting bolts and drive coupling for looseness. Inspect winged endplates for wear, bent flanges, or loose mounting hardware. Verify auxiliary hydraulic hose routing is clear of pinch points against the carrier's lift arms. Check coupler wedge/lock plates for wear and confirm full engagement travel.
Every 500 h	Inspect the rotor bearings for play or roughness by hand-rotating the drum with hydraulics isolated. Check the drive housing for correct lubricant level per the OMM and top off as specified. Inspect the hydraulic motor for internal leakage (case-drain flow, if the carrier supports checking it) and shaft seal weep. Torque-check frame, endplate, and coupler mounting bolts to specification. Inspect gauge wheel tires or rollers for cracking, flat-spotting, or bearing play.
Every 1,000 h	Remove and inspect the rotor drive coupling and hydraulic motor for wear beyond service limits. Service the internal drive lubricant per the OMM interval. Inspect all hydraulic hoses for age-related hardening or cover cracking and replace any hose approaching its service life. Disassemble and regrease the angle-cylinder pivot pins and bushings, checking for bore wear. Check the 14-pin electrical connector (hydraulic-angle control) for corrosion or damaged pins.
Every 2,000 h	Perform a full teardown inspection of the rotor assembly, bearings, and seals and rebuild as needed. Inspect the angle cylinder for rod scoring, seal leakage, and cylinder-bore wear; recondition or replace. Replace the quick-attach coupler pins and bushings if wear exceeds the OMM limit. Inspect the main frame and roller housing for cracks or weld fatigue at high-stress mounting points.

Servicing the PR190 beyond the schedule

Predictive Maintenance and Fluid Analysis

The PR190 has no engine oil or coolant to sample, so condition monitoring centers on the internal drive housing and the carrier's hydraulic system. Track drive housing lubricant condition at the OMM-specified interval for water intrusion or metal fines that signal bearing or drive wear. Watch the host carrier's hydraulic oil analysis for contamination trends when the rake is in heavy rotation, since the attachment shares the carrier's auxiliary circuit rather than running an isolated reservoir. Rising rotor noise or vibration is the earliest warning of bearing wear.

Corrective and Common Repairs

Typical PR190 repairs involve the hydraulic motor, drive coupling, and quick-attach coupler rather than any powertrain. Leaking motor shaft seals, worn coupler pins, and damaged hydraulic hoses or quick-disconnects are the most common field fixes given the rake's constant angling and rotor loading. Bent or cracked winged endplates from raking against curbs and foundations, and worn or seized gauge wheel spindles, round out the common repair list. Isolate carrier hydraulics before disconnecting any line.

Overhaul and Rebuild Points

A PR190 overhaul centers on the rotor assembly: bearings, seals, and the internal drive mechanism wear from continuous rotation under load and abrasive debris. The hydraulic angle cylinder is the other major rebuild point, with rod seal and bore wear from repeated full-stroke cycling in the field. Coupler pin and bushing wear at the quick-attach interface should be checked against OMM limits at rebuild time, along with frame and endplate welds for fatigue cracking at high-stress mounting points.

Seasonal and Environment Servicing

Between seasons, purge and inspect all hydraulic hoses and couplers for weather-related hardening or corrosion before storage, and grease every pivot and coupler pin to displace moisture. In sandy or abrasive ground conditions, shorten the rotor tooth and gauge-wheel wear inspection interval since fine debris accelerates rotor bearing and drive-seal wear. Before winter storage, cycle the angle function through full travel to work grease into the pivot bushings and prevent the cylinder from sitting seized in one position.

PR190 attachments & work tools

Product identity

The PR190 is not a host machine but a Cat Power Box Rake work tool for skid steer, compact track and multi terrain loaders. It sits at the top of the power box rake lineup alongside the smaller PR121, PR172 and PR184, sharing a common rotating-tine roller design used for de-thatching, grading, leveling, seedbed prep and windrowing debris.

Family sizing for this class

Roller/working widths across the family run from about 1829 mm (72 in) on the PR172 up to 2134 mm (84 in) on the PR121 and PR184, and 2286 mm (90 in) on the PR190, which is the widest unit (overall width 2515 mm / 99 in). Raking width at maximum angle narrows to roughly 85-90 percent of roller width, about 2159 mm (85 in) on the PR190.

Angling configuration

All models in the class angle up to 20 degrees left or right of center. The PR172 and PR184 are offered in both manual-angle and hydraulic-angle versions; the PR190 is only listed as the hydraulic-angle unit, letting the operator swing the box from the cab rather than by hand, consistent with its position as the largest, heaviest member of the family.

Coupler/mounting system

The rake mounts to the host loader through the standard universal quick-attach plate common to Cat skid steer, compact track, and multi terrain loaders, matching the same lift-arm/coupler interface used across the Cat work-tool line. No model-specific coupler is documented for this rake family beyond the standard loader quick-attach face.

Hydraulic kit/arrangement

The roller drive runs on the host machine's standard-flow auxiliary hydraulic circuit, with an optimal flow around 57-86 L/min (15-23 gpm) at roughly 230 bar (about 3300 psi) for the PR184/PR190 size class; the smaller PR121 is quoted with a similar 49-87 L/min range at 170-241 bar. The hydraulic-angle function on this family additionally calls for the loader's 14-pin electrical auxiliary connection to power the in-cab angle control, so hydraulic-angle units need both standard-flow hydraulics and electrical auxiliary wiring, while manual-angle siblings need only the hydraulic circuit to drive the roller. No high-flow variant is documented for this size.

Host loader compatibility

Dealer fitment charts list the power box rake family (PR172/PR184/PR190) against Cat skid steer and multi terrain loaders spanning roughly the 216B3/226B3/226D through 299D2 range and the 906K-908K / 906M-908M compact wheel loader series, i.e. the mid-to-large compact loader classes able to supply standard-flow auxiliary hydraulics. No PR190-only fitment chart is published separately from this family-wide list.

Factory configuration and guarding options

Standard build includes dual, independently adjustable gauge wheels for skim passes (over-seeding) or drainage-grade cuts, two-position winged endplates that stay parallel to the ground through the angling range for close raking along sidewalks or foundations, and a tool-mounted operation-and-maintenance manual holder. The main factory choice for this class is manual-angle versus hydraulic-angle control; no other drum or guarding options are documented for the PR190 beyond the standard endplate and gauge-wheel setup.

All PR190 assemblies by section

Every catalogued assembly group for the Caterpillar PR190. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Frame And Body

276-4418 Deflector Gp-Debris

03***55	Locknut; (5/16-18-Thd)(Marked X)	24
1D***72	Bolt-Carriage; (1/2-13x5.5-In)	24
27***18	Deflector Group-Debris	1
27***17	Bolt-Special	2

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276-4408 Deflector Gp-Debris

03***55	Locknut; (5/16-18-Thd)(Marked X)	16
1D***72	Bolt-Carriage; (1/2-13x5.5-In)	16
27***08	Deflector Group-Debris	1
27***64	Barrier	2

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276-4428 Deflector Gp-Debris

03***55	Locknut; (5/16-18-Thd)(Marked X)	24
1D***72	Bolt-Carriage; (1/2-13x5.5-In)	24
27***28	Deflector Group-Debris	1
27***17	Bolt-Special	2

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276-4430 Frame Gp-Landscape Rake

02***87	Fitting-Grease; (Universal Joint)	4
0T***84	Bolt 19 mm(.75 In.) Long	3
27***30	Frame Group-Landscape Rake	1
27***70	Bushing	1

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276-4426 Frame Gp-Landscape Rake

15***70	Lockwasher	2
27***26	Frame Group-Landscape Rake	1
27***28	Deflector Group-Debris	1
27***29	Wheel Group-Landscape Rake	2

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276-4416 Frame Gp-Landscape Rake

15***70	Lockwasher	1
27***09	Wheel Group-Landscape Rake	2
27***16	Frame Group-Landscape Rake	1
27***18	Deflector Group-Debris	1

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277-8221 Frame Gp-Landscape Rake

02***87	Fitting-Grease; (Universal Joint)	4
0T***84	Bolt 19 mm(.75 In.) Long	3
27***70	Bushing	1
27***71	Bolt-Pivot; (1-14x6.5-In)	1

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276-4410 Frame Gp-Landscape Rake

02***87	Fitting-Grease; (Universal Joint)	4
0T***84	Bolt 19 mm(.75 In.) Long	3
27***10	Frame Group-Landscape Rake	1
27***70	Bushing	1

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277-8211 Frame Gp-Landscape Rake

02***87	Fitting-Grease; (Universal Joint)	4
0T***84	Bolt 19 mm(.75 In.) Long	3
27***70	Bushing	1
27***71	Bolt-Pivot; (1-14x6.5-In)	1

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276-4406 Frame Gp-Landscape Rake

15***70	Lockwasher	1
27***06	Frame Group-Landscape Rake	1
27***08	Deflector Group-Debris	1
27***09	Wheel Group-Landscape Rake	2

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276-4409 Wheel Gp-Landscape Rake

02***87	Fitting-Grease; (Universal Joint)	1
0S***79	Bolt 5.08 cm(2 In.) Long	1
1B***39	Nut Connecting Link	1
1K***56	Nut-Slotted	1

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276-4429 Wheel Gp-Landscape Rake

0S***79	Bolt 5.08 cm(2 In.) Long	1
1K***72	Locknut Horn To Guard	2
27***29	Wheel Group-Landscape Rake	1
27***88	Handle	1

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Hydraulic System

277-8222 Lines Gp-Connecting

13***38	Connector	1
14***15	Connector As	2
15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1

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277-8212 Lines Gp-Connecting

14***15	Connector As	2
14***41	Connector Group	2
15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1

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277-8217 Lines Gp-Connecting

14***15	Connector As	2
14***41	Connector Group	2
15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1

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276-4420 Lines Gp-Cylinder & Manifold

13***38	Connector	1
14***15	Connector As	2
14***41	Connector Group	2
14***39	Tee As	2

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276-4411 Lines Gp-Cylinder & Manifold

13***38	Connector	1
14***15	Connector As	2
14***41	Connector Group	2
15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1

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276-4431 Lines Gp-Cylinder & Manifold

13***38	Connector	1
14***15	Connector As	2
14***39	Tee As	2
15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1

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Service Equipment And Supplies

277-8213 Plate & Film Gp

22***45	Film-Warning; (Crush Hazard, Stay Back)	2
22***30	Film-Warning; (Flying Debris, Stay Back, U.S.)	1
22***42	Film-Warning; (Crush Hazard, Stay Back, U.S.)	2
22***69	Film-Warning; (Do Not Operate, Read Omm)	2

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276-4413 Plate & Film Gp

22***45	Film-Warning; (Crush Hazard, Stay Back)	2
22***30	Film-Warning; (Flying Debris, Stay Back, U.S.)	1
22***42	Film-Warning; (Crush Hazard, Stay Back, U.S.)	2
22***69	Film-Warning; (Do Not Operate, Read Omm)	2

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276-4419 Plate & Film Gp

22***45	Film-Warning; (Crush Hazard, Stay Back)	2
22***30	Film-Warning; (Flying Debris, Stay Back, U.S.)	1
22***42	Film-Warning; (Crush Hazard, Stay Back, U.S.)	2
22***69	Film-Warning; (Do Not Operate, Read Omm)	2

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277-8223 Plate & Film Gp

22***45	Film-Warning; (Crush Hazard, Stay Back)	2
22***30	Film-Warning; (Flying Debris, Stay Back, U.S.)	1
22***42	Film-Warning; (Crush Hazard, Stay Back, U.S.)	2
22***69	Film-Warning; (Do Not Operate, Read Omm)	2

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276-4433 Plate & Film Gp

22***45	Film-Warning; (Crush Hazard, Stay Back)	2
22***30	Film-Warning; (Flying Debris, Stay Back, U.S.)	1
22***42	Film-Warning; (Crush Hazard, Stay Back, U.S.)	2
22***69	Film-Warning; (Do Not Operate, Read Omm)	2

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277-8216 Plate & Film Gp

22***45	Film-Warning; (Crush Hazard, Stay Back)	2
22***30	Film-Warning; (Flying Debris, Stay Back, U.S.)	1
22***42	Film-Warning; (Crush Hazard, Stay Back, U.S.)	2
22***69	Film-Warning; (Do Not Operate, Read Omm)	2

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Work Tool Arrangement

276-4405 Landscape Power Rake Ar

22***15	Harness As-Work Tool; (Connecting)	0
27***05	Landscape Power Rake Ar	1
27***06	Frame Group-Landscape Rake	1
27***07	Drive Group-Landscape Rake	1

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276-4415 Landscape Power Rake Ar

22***15	Harness As-Work Tool; (Connecting)	1
27***12	Wiring Group-Work Tool	1
27***15	Landscape Power Rake Ar	1
27***16	Frame Group-Landscape Rake	1

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277-8215 Landscape Power Rake Ar

27***16	Frame Group-Landscape Rake	1
27***17	Drive Group-Landscape Rake	1
27***15	Landscape Power Rake Ar	1
27***16	Plate & Film Group	1

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276-4425 Landscape Power Rake Ar

22***15	Harness As-Work Tool; (Connecting)	1
27***12	Wiring Group-Work Tool	1
27***25	Landscape Power Rake Ar	1
27***26	Frame Group-Landscape Rake	1

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277-8220 Landscape Power Rake Ar

27***26	Frame Group-Landscape Rake	1
27***27	Drive Group-Landscape Rake	1
27***20	Landscape Power Rake Ar	1
27***21	Frame Group-Landscape Rake	1

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277-8210 Landscape Power Rake Ar

27***06	Frame Group-Landscape Rake	1
27***07	Drive Group-Landscape Rake	1
27***10	Landscape Power Rake Ar	1
27***11	Frame Group-Landscape Rake	1

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Work Tools

276-4427 Drive Gp-Landscape Rake

03***55	Locknut; (5/16-18-Thd)(Marked X)	2
1K***72	Locknut Horn To Guard	4
26***15	Motor Group-Gerotor	1
27***27	Drive Group-Landscape Rake	1

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276-4407 Drive Gp-Landscape Rake

03***55	Locknut; (5/16-18-Thd)(Marked X)	2
23***89	Nut-Flange; (1/2-13-Thd)	4
27***07	Drive Group-Landscape Rake	1
27***36	Roller As	1

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276-4417 Drive Gp-Landscape Rake

03***55	Locknut; (5/16-18-Thd)(Marked X)	2
23***89	Nut-Flange; (1/2-13-Thd)	4
27***17	Drive Group-Landscape Rake	1
27***38	Cover	1

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PR190 serial number reference

The PR190 has no engine, so there is no engine-side plate; the machine ID plate is riveted to the rake's main frame near the carrier mounting bracket. The plate lists the full Product Identification Number (PIN); the first three characters are the alphanumeric serial prefix that identifies this specific rake model and size, followed by a sequential unit number. Match the prefix stamped on the plate against the model's documented range before ordering parts, since PR172, PR184, and PR190 look alike but do not share prefixes.

Prefix	Identifies	Notes
GLB	PR190 Power Box Rake, 99 in / 2515 mm overall width, 90 in / 2286 mm roller width, hydraulic-angle configuration	Sole documented prefix for the PR190 work tool, range GLB00001-UP. The PR190 is a passive landscape/power box rake with no engine or ECM, driven off the host carrier's auxiliary hydraulic circuit through a hydraulic motor. It shares a parts and service manual with siblings PR172 and PR184, but each size owns its own prefix range, distinct from PR190's. Sold only as a Hydraulic Angle configuration, letting the operator set rake angle up to 20 degrees either direction from the cab; no Manual Angle PR190 variant exists, unlike the smaller PR172 which is offered in both Manual and Hydraulic Angle versions. Fits skid steer loaders, compact track/multi-terrain loaders, and small wheel loader carriers. No second PR190 prefix or generation split found; treat as a single confirmed serial range.

Frequently asked questions

What engine does the Caterpillar PR190 use?

None. The PR190 is a passive work tool with no onboard engine, ECM, or fuel system. It runs off the host carrier machine's auxiliary hydraulic circuit, at an optimal flow of 57-86 L/min (15-23 gpm) and pressure of 230 bar (3,336 psi), with hydraulic-angle control powered through the carrier's 14-pin electrical connection.

What does the Caterpillar PR190 weigh?

The PR190 has an operating weight of 599 kg (1,320 lb).

Is there a bigger Power Box Rake than the PR190?

No. The PR190 is the widest and largest unit in Caterpillar's current Power Box Rake lineup, which also includes the PR121, PR172, and PR184. These are sibling sizes built for the same task rather than a generational sequence, and no larger or replacement model is documented.

What PR190 owners discuss

What hydraulic flow and pressure does the PR190 actually need from the carrier, and what happens if it doesn't match?

The PR190 wants an auxiliary circuit in the roughly 57-86 L/min range at about 230 bar to spin the rotor and, on the hydraulic-angle version, shift the angle cylinder. Running it off a carrier well under that range gives a sluggish, bogging rotor that stalls in heavier windrows. Running it well over the top end is the more common complaint: excess flow across the motor and drive housing shows up as heat, seal weeping at the motor, and faster internal drive wear since the housing is dumping more energy than the drivetrain is sized for. Owners generally match the rake to a mid-flow skid steer or CTL rather than maxing out a high-flow unit on it.

The drive housing sounds like it's rattling or growling under load - is that normal?

The rotor drive runs enclosed in a sealed housing, which is meant to be quiet and self-lubricating as long as the fluid or grease level is correct. A growl or rattle that wasn't there before usually means the housing is low on lubricant or internal drive components have worn. Pull the fill/level plug and check before running it further - operating an enclosed drive dry or low invites rapid internal wear and eventual failure inside a sealed housing that's not meant to be opened often. The exact fill spec varies by source, so match whatever the tag or dealer parts book on the specific unit calls for rather than guessing.

How much wear should I expect on the rotor teeth and rake bar?

In sandy or loamy soil the rotor teeth last a long time; in rocky, gravelly, or root-filled ground they dull and chip much faster, and it's normal to replace individual teeth rather than the whole rotor bar. A worn tooth base under an intact-looking tip is easy to miss on a quick walk-around, so run a finger down the mounting base rather than just eyeballing the tip. A bent rake bar or sheared tooth after hitting a buried rock or stump is a wear-and-tear event, not a defect - inspect the bar for straightness after any hard strike.

The hydraulic angle drifts out of position on its own - what's going on?

An angle cylinder on this class of attachment is only as good as its seals and the valve holding it. Creep with the machine shut down and the hoses still connected usually points to a worn rod seal or a holding valve that isn't sealing, letting the cylinder bleed down. Contaminated oil or heat-hardened seals accelerate this. Because an unexpected angle shift can catch a bystander or swing the rake into an obstacle while raised, don't just live with the drift - have your dealer verify the cylinder seals and the holding valve before putting the attachment back to work.

What causes uneven grading depth even after I set the gauge wheels?

Depth of cut on this class of rake is controlled by the adjustable gauge wheels and the skid shoes riding on the ground. If the shoes are worn unevenly or the gauge wheel bearings have play, the rake rides inconsistently and leaves a wavy finish grade even with the wheels set correctly. Check shoe thickness and wheel bearing play together, not just the height-adjustment pins, when the finish grade starts looking inconsistent.

Does the PR190 have any electronics or sensors that can fail?

No - it's a passive work tool with no engine, ECM, or onboard sensors of its own. The only electrical tie-in is at the carrier: the proportional joystick control that runs the hydraulic-angle function through the aux circuit. Sluggish or jerky angling usually traces back to the carrier's joystick detent or proportional valve, or to a worn or partially seated quick-disconnect coupler leaking at the flat-face fitting, rather than anything on the rake itself. Check couplers and the carrier's aux control behavior before assuming the attachment is at fault.

What should I check before buying a used PR190?

Walk the drive housing first - check the fluid or grease level and condition and listen for noise once it's spinning. Grab the rotor and check for play against the drive shaft, which points to a worn internal drive component or bearing before anything else shows it. Look at tooth wear pattern and the steel bases under the tips for evidence of hard rock work. Cycle the hydraulic angle, if equipped, in both directions and watch for drift or slow, jerky response, which points to cylinder, valve, or hose wear. Check gauge wheel bearings and skid shoe thickness, since those wear items are easy to overlook on a quick look-over. Finally, confirm the carrier you plan to run it on actually falls inside the roughly 57-86 L/min, 230 bar flow and pressure window - a mismatch there is a common reason an otherwise sound used rake performs poorly on a new host machine.

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

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