Caterpillarwork toolvibratory compactor

Caterpillar CVP40

Maintenance schedule, common problems & OEM parts breakdown

The Cat CVP40 is a passive hydraulic vibratory plate compactor work tool, not a self-powered machine — it has no engine, no ECM, and no cooling or fuel system of its own. It runs entirely off the host carrier's auxiliary hydraulic circuit, drawing roughly 69-87 L/min (18-23 gpm) at 12,400-17,200 kPa (1,800-2,500 psi), and is sized for mini excavators in the 6-10 metric ton class and compatible backhoe loaders. Operating weight runs 350-401 kg (772-884 lb) depending on generation and mounting bracket, with impulse force around 40 kN (about 8,990 lbf) and impact frequency around 2,200 blows per minute holding steady across both design generations. It mounts via pin-on, pin-grabber, pin-lock, or CW/S-series quick-coupler brackets shared with Cat's hammer line, and factory options include a bolt-on backfill blade and a roughly 180-degree swivel plate.

Caterpillar has cataloged the CVP40 under two distinct designs. The earlier generation, built for period carriers like the 416D, 420D, 426C, 430D, 436C, 438C, and 446B, weighs 401 kg (884 lb) with a 584 x 965 mm plate. The current generation, relaunched as part of a four-model CVP16/CVP28/CVP40/CVP55 lineup, trims weight to 350 kg (771.6 lb), grows the plate slightly to 590 x 980 mm, and reroutes hoses inside the frame with jumper lines out the back for better clearance in tight trenches. Impulse force and impact frequency carried over largely unchanged between the two designs, so compaction output is consistent whichever generation you buy. That consistency, combined with having no engine or electronics to fail, is why the CVP40 holds its value well on the used market — the real condition checks for a buyer are exciter bearing/seal health and isolator bushing wear, not hour meters or fault codes.

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 CVP40 specifications

Engine

Power source	No onboard engine. Passive hydraulic attachment driven entirely by the carrier machine's hydraulic system.
Drive unit	Internal high-efficiency hydraulic motor turns an eccentric vibration mass; motor shaft runs on oil-bath bearings, no daily greasing required.
Emissions tier	Not applicable — no combustion engine or ECM on the attachment.

Weights

Weight, without bracket or blade (current-generation CVP40, MHE 6-10 ton / BHL 415-450 compatibility)	350 kg (771.6 lb)
Weight, without bracket or blade (earlier-generation CVP40, for 416D/420D/426C/430D/436C/438C/446B/307C carriers)	401 kg (884 lb)
Shipping weight	Not separately published; base unit weight above is the only published figure
Ground pressure	Not applicable to this attachment type — see base plate (static) pressure under Performance

Dimensions

Base plate width x length (current generation)	590 x 980 mm (23.2 x 38.6 in)
Base plate dimensions (earlier generation)	584 x 965 mm (23 x 38 in)
Overall height (current generation)	621 mm (24.4 in)
Height (earlier generation)	622 mm (24.5 in)
Working length (current generation)	740 mm (29.1 in)
Compaction/plate area (current generation)	0.44 m² (4.7 ft²)
Plate area (earlier generation)	0.567 m² (6.1 ft²)
Transport length/width/height as a fitted carrier attachment	Not separately published — attachment ships/transports as part of the host machine's arm/frame envelope

Performance

Impulse force	40 kN (approx. 8,928-8,992 lb), both generations
Impact frequency	2,200 impacts/blows per minute, both generations
Base plate (static) pressure, current generation	91.8 kPa (13.3 psi)
Base plate (static) pressure, earlier generation	70.1 kPa (10.2 psi) — varies by generation/configuration
Optimal hydraulic flow	69-87 L/min (18-23 gpm), current generation; 68-83 L/min (18-22 gpm), earlier generation
Minimum operating pressure, current generation	13,000 kPa (1,885 psi) minimum
Operating pressure range, earlier generation	12,411-15,168 kPa (1,800-2,200 psi)
Carrier weight class, current generation	Mini hydraulic excavators, 6-10 ton class; backhoe loaders in the 415-450 model range (not compatible with side-shift backhoe loaders)
Carrier weight range, earlier generation	4,536-11,340 kg (10,000-25,000 lb) carrier weight; named-compatible carriers 416D, 420D, 426C, 430D, 436C, 438C, 446B and 307C
Optional post driver	Drives posts up to 254 mm (10 in) diameter
Optional swivel plate	Manual 90-degree left/right rotation, 180 degrees total, to cut down on machine repositioning
Optional backfill blade	Bolt-on, mountable front or back, for pushing loose material into a trench or work area

Service capacities (summary)

Fuel tank	Not applicable — attachment has no fuel system
Hydraulic system	No independent reservoir — draws flow and pressure directly from the carrier machine's hydraulic circuit through a jumper hose kit; integral pressure/flow control valve protects the motor across different host machines
Engine oil / gearbox lubricant	Internal motor bearings run in an oil bath; drain/fill via a rear centerline plug, can be serviced with the compactor still mounted; specific fill capacity not published
Cooling system	Not applicable — no dedicated cooling circuit on the attachment

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

CVP40 fluids & capacities

System	Capacity	Recommended fluid
Engine crankcase (with filter)	Not applicable	CVP40 has no onboard engine. It is a passive hydraulically driven vibratory plate compactor attachment mounted on a carrier's dedicated hydraulic coupler.
Cooling system	Not applicable	No engine, no radiator, no coolant circuit on the attachment itself.
Fuel tank	Not applicable	No fuel system on the attachment.
Transmission/powertrain	Not applicable	No transmission. Vibration is produced by a hydraulically driven exciter, not a mechanical drivetrain.
Final drives	Not applicable	None fitted.
Hydraulic system and tank	No dedicated reservoir on the attachment. Runs on the host carrier's hydraulic system, needs about 68-83 L/min (18-22 US gpm) auxiliary flow at roughly 124-152 bar (1,800-2,200 psi) system pressure	Use the host excavator/loader's own hydraulic oil per that carrier's OMM. CVP40 has no separate hydraulic fluid spec of its own.
Axles/differentials	Not applicable	None fitted.
Exciter/vibrator housing (gear oil)	Not documented in sources reviewed. The housing has its own oil fill/drain plug on the rear centerline, changed with the compactor still mounted; interval is roughly every six months of service. Exact fill quantity not confirmed - check the OMM data plate or dealer parts lookup for this serial range	Cat calls for a gear-type lubricant in the exciter housing per the OMM lubrication chart, but the specific Cat fluid-name grade (e.g., Cat TDTO or equivalent) could not be confirmed for this model from sources reviewed - verify with your Cat dealer before servicing.
Grease (spec only)	Spec only, no fill volume	Coupler pivots and mounting pins take standard Cat multipurpose NLGI 2 grease at normal attachment service intervals. Rubber shock/isolator mounts are inspected (not greased) for cracking at each daily check.

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

Caterpillar CVP40 maintenance schedule

Service interval	Tasks
Every 50 h	Wash packed mud and debris off the base plate, frame, and isolator area before it dries and traps moisture against the bushings. Inspect isolator/shock mount bushings for cracking or tearing at the top outer crease; rotate a mount 180 degrees at the first sign of cracking. Check base plate and frame welds for cracks, bends, or gouges from rock strikes. Inspect hydraulic hoses, jumper lines, and quick-coupler fittings for leaks, chafing, or loose connections. Check mounting pins and pin-lock/pin-grabber or CW/S-coupler fasteners for correct torque and play. Look for oil weep at the exciter housing seals.
Every 250 h	Check exciter housing oil level at the fill/level plug with the unit cool and sitting level. Torque-check all frame, bracket, and coupler fasteners to spec. Inspect isolator bushings closely for delamination or uneven compression; replace any that are split or offset. Check the base plate wear pattern for uneven wear, a sign of a worn or misaligned isolator. Inspect the hydraulic motor mounting area and drive coupling for play or wear.
Every 500 h	Drain and refill exciter housing oil, or sooner if the fluid shows metal fines or a milky color. Inspect quick-coupler wear plates and pins for excess play; shim or replace as needed. Inspect full hose assemblies for cover cracking, cold-flow, or swelling and replace any suspect hose. Check the carrier's auxiliary hydraulic filter and relief-valve setting, since the compactor's high-flow circuit loads that same filter hard. Re-torque backfill blade or swivel-plate bolt-on hardware if fitted.
Every 1,000 h	Pull an oil sample from the exciter housing for lab analysis to check for bearing wear metal before it progresses. Inspect the exciter bearing and seal area for play or leakage at the housing joint. Measure base plate thickness and flatness; plan build-up weld repair or plate replacement if it is nearing minimum. Replace isolator bushings as a matched set if wear is uneven rather than swapping one at a time. Inspect the frame around bracket-to-frame welds for fatigue cracking.
Every 2,000 h	Tear down and inspect or rebuild the exciter assembly (bearings, seals, eccentric weight) based on oil-sample trend and vibration feel. Replace the full isolator bushing set on high-duty-cycle units even if wear looks even, to keep frame vibration balanced. Recondition or replace the base plate if it has not already been addressed. Re-certify coupler and mounting bracket wear against factory tolerance before returning the unit to service.
Every 4,000 h	Treat this as a major rebuild point on heavy-duty-cycle units: exciter, isolators, and base plate typically all need attention by this stage. Inspect the entire frame casting/weldment for stress cracking under magnetic particle or dye-penetrant check if the unit has seen continuous trench work. Replace coupler pins, bushings, and wear plates as a set rather than patching individual components. Confirm with your dealer whether the exciter housing or drive components have an updated part revision before ordering rebuild parts.

Servicing the CVP40 beyond the schedule

Predictive maintenance & fluid analysis

The CVP40 has no reservoir of its own, so fluid analysis means sampling the carrier's auxiliary hydraulic oil, not a separate compactor circuit. High-flow, high-pressure compaction duty cycles load that oil harder than digging work, so shorten sample intervals on units running the compactor often. Separately, pull periodic samples from the exciter housing itself — metal fines flag bearing wear early, and a milky or discolored sample means a seal has let water into the housing. Trend both alongside carrier hydraulic motor temperature.

Corrective & common repairs

Most CVP40 repairs center on three wear points: isolator bushings that crack or tear under sustained cycling (rotate a mount 180 degrees at first crack, replace before it tears through), base plate cracking or wear from rock contact (build-up weld or replace), and hydraulic motor shaft seal leaks that show up as lost vibration force or oil weep at the exciter housing. Coupler pin and wear-plate play is the other common fix — shim or replace before it becomes frame movement under load.

Overhaul & rebuild points

A full exciter rebuild means replacing bearings, seals, and eccentric weight bushings inside the vibrator housing together, since they wear on the same clock — piecemeal replacement just invites a repeat teardown. Replace isolator bushings as a complete set, not one at a time, to keep vibration balanced across the frame. Base plate reconditioning or replacement is the other major overhaul item. Check coupler and bracket wear against factory tolerance before returning any rebuilt unit to service.

Seasonal & environment servicing

In cold weather, warm the carrier's hydraulic oil and cycle the compactor at reduced flow before running it at full output — cold, viscous oil stresses the exciter motor and isolator bushings on startup. On wet or muddy sites, clear packed mud from the base plate, frame, and any breather points daily; trapped moisture is what attacks isolator bushings and pin bores over time. Before winter storage, drain any water that has collected at the exciter housing breather.

CVP40 common service parts

Part number	Part	Notes
212-0787	Cartridge As-Logic Element	Scheduled service item	Check fitment →

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CVP40 attachments & work tools

Carrier / size class compatibility

CVP40 is a vibratory plate compactor work tool sized for mini excavators and small backhoe loaders in roughly the 3-8 tonne carrier class, with dealer fitment guides listing hosts such as the 307/308CR excavators and 416-446 backhoe loader range. Exact host list varies by dealer region and carrier generation, so confirm against the current fitment chart for the specific carrier serial.

Coupler / mounting systems

Mounts via bolt-on bracket options shared with Cat's B and H series hydraulic hammers: pin-on, pin grabber, pin lock, and CW/S-type quick-coupler brackets. Bracket choice is matched to the carrier's own coupler, not the compactor itself, so the same CVP40 head can be rebracketed across different coupler standards.

Hydraulic kit / auxiliary hydraulics

Requires carrier auxiliary hydraulics; optimal flow is around 68-87 lpm (18 gpm class) at a minimum operating pressure in the 12400-17200 kPa (1800-2500 psi) range, figures vary slightly by source and carrier circuit. Hydraulic hoses run protected inside the compactor frame with jumper lines routed out the back for connection to the carrier's dedicated hydraulic or quick-coupler circuit.

Backfill blade option

Optional bolt-on backfill blade mounts to the front, rear, or both ends of the plate to push loose material into place while compacting, useful for trench backfill and material grading without switching tools.

Swivel plate option

Optional bolt-on swivel plate lets the operator manually rotate the compaction plate roughly 90 degrees each direction (about 180 degrees of total swing) to reach into corners and along walls with less carrier repositioning.

Frame and isolation guarding

Heavy-duty steel frame with solid rubber isolator bushings absorbs vibration to protect the carrier's stick and hydraulic fittings from fatigue; internally routed hoses reduce exposure to snagging or wear during trench and confined-space work.

All CVP40 assemblies by section

Every catalogued assembly group for the Caterpillar CVP40. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Hydraulic System

231-4300 Fitting Gp-Hydraulic

21***93	Hose As	2
21***20	Lines Group-Hydraulic	1
23***00	Fitting Group-Hydraulic	1
3K***60	Seal Pilot Manifold On; Seal To Boom Check Valve Drain	2

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211-8189 Lines Gp-Connecting

10***01	Fitting; (Quick Disconnect, Female)	1
10***06	Fitting; (Quick Disconnect, Male)	1
21***89	Lines Group-Connecting	1
21***96	Hose As	2

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212-0785 Lines Gp-Connecting

21***85	Lines Group-Connecting	1
21***19	Hose As	2
5K***90	Seal-To Hydraulic Cooler Inlet Port	2
6V***35	Connector-Seal; (1- 5/16-12)	2

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256-0045 Lines Gp-Connecting

211-8195 Lines Gp-Connecting

1P***04	Seal - Rectangular (45mm Dia)	2
1P***67	Flange-Half (43.31 mm Id)	4
21***95	Lines Group-Connecting	1
21***88	Hose As	2

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255-8487 Lines Gp-Connecting

21***96	Hose As	2
25***87	Lines Group-Connecting	1
5K***90	Seal-To Hydraulic Cooler Inlet Port	4
6V***16	Connector-Seal; (1- 5/16-12)	2

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213-0472 Lines Gp-Connecting

1P***04	Seal - Rectangular (45mm Dia)	2
1P***67	Flange-Half (43.31 mm Id)	4
21***72	Lines Group-Connecting	1
25***86	Hose As	2

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213-1820 Lines Gp-Hydraulic

21***20	Lines Group-Hydraulic	1
21***34	Hose As	2
2S***78	Seal-O-Ring (Id=37.47mm)	2
3E***26	Elbow-90 Degree	2

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214-4733 Lines Gp-Hydraulic

03***21	Ring-Back-Up	1
09***32	Seal-O-Ring (Id=28.24mm)	1
16***49	Seal-O-Ring; (12.42mm Id)	1
16***54	Seal-O-Ring	1

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207-2309 Manifold Gp-Control

03***21	Ring-Back-Up	1
09***32	Seal-O-Ring (Id=28.24mm)	1
16***49	Seal-O-Ring; (12.42mm Id)	1
16***54	Seal-O-Ring	1

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205-9395 Manifold Gp-Control

03***21	Ring-Back-Up	1
09***32	Seal-O-Ring (Id=28.24mm)	1
16***49	Seal-O-Ring; (12.42mm Id)	1
16***54	Seal-O-Ring	1

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222-3779 Manifold Gp-Control

22***79

Manifold Group-Control

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212-3440 Manifold Gp-Control

03***21	Ring-Back-Up	1
1H***23	Packing,Preformed Part Of Kit P/N 5r***25	1
21***40	Manifold Group-Control	1
22***38	Valve Group-Check; (Parking Brake Oil)	1

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Work Tools

212-3450 Blade Gp-Compactor

21***50	Blade Group-Compactor	1
21***66	Blade As	1
21***24	Plate	2
3E***62	Nut-Hard-Self Lock; (3/4unc)	6

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222-6443 Blade Gp-Compactor

0S***79	Bolt 5.08 cm(2 In.) Long	2
0S***03	Bolt,Machine Fuel Pump Drive Gear Mounting	2
22***43	Blade Group-Compactor	1
22***02	Plate	1

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212-0789 Blade Gp-Compactor

21***89	Blade Group-Compactor	1
21***90	Blade As	1
21***24	Plate	2
3E***62	Nut-Hard-Self Lock; (3/4unc)	6

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211-8200 Blade Gp-Compactor

21***00	Blade Group-Compactor	1
21***79	Blade As-Straight	1
21***23	Plate	2
6V***87	Locknut; (M12x1.75-Thd)	6

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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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259-1760 Bracket Gp-Mounting

17***71	Bracket As	1
18***20	Locknut; (M20x2.5-Thd)	8
25***60	Bracket Group-Mounting	1
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	16

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259-1768 Bracket Gp-Mounting

17***74	Bracket As	1
25***68	Bracket Group-Mounting	1
6V***76	Nut-Lock; (M24 X 3.0)	8
7X***54	Bolt; (M24x3.0x110mm)	8

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259-1767 Bracket Gp-Mounting

20***54	Bracket As	1
25***67	Bracket Group-Mounting	1
6V***76	Nut-Lock; (M24 X 3.0)	8
7X***54	Bolt; (M24x3.0x110mm)	8

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259-1753 Bracket Gp-Mounting

17***68	Bracket As	1
18***20	Locknut; (M20x2.5-Thd)	4
25***53	Bracket Group-Mounting	1
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	8

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192-4211 Bracket Gp-Mounting

19***11	Bracket Group-Mounting	1
19***92	Bracket As	1
7X***54	Bolt; (M16x2x70-mm)	12
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	16

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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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259-1762 Bracket Gp-Mounting

17***73	Bracket As	1
25***62	Bracket Group-Mounting	1
6V***76	Nut-Lock; (M24 X 3.0)	8
7X***54	Bolt; (M24x3.0x110mm)	8

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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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259-1759 Bracket Gp-Mounting

18***20	Locknut; (M20x2.5-Thd)	4
24***57	Bracket As	1
25***59	Bracket Group-Mounting	1
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	8

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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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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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3q-7608 Bracket Gp-Mounting

16***56	Bracket As	1
3Q***08	Bracket Group-Mounting	1
7X***54	Bolt; (M16x2x70-mm)	12
7X***64	Bolt; (M20x2.5x90-mm)	8

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219-0667 Bracket Gp-Mounting

21***67	Bracket Group-Mounting	1
21***68	Bracket As	1
7X***54	Bolt; (M16x2x70-mm)	12
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	16

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305-4984 Bracket Gp-Mounting

18***62	Hose As	1
20***88	Isolator	4
20***90	Frame As	1
20***91	Compactor As	1

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7q-8466 Bracket Gp-Mounting

16***58	Bracket As	1
7Q***66	Bracket Group-Mounting	1
7X***54	Bolt; (M16x2x70-mm)	12
7X***64	Bolt; (M20x2.5x90-mm)	8

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3q-7609 Bracket Gp-Mounting

16***57	Bracket As	1
3Q***09	Bracket Group-Mounting	1
7X***54	Bolt; (M16x2x70-mm)	12
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	16

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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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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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226-2797 Bracket Gp-Mounting

22***97	Bracket Group-Mounting	1
22***96	Bracket As	1
8T***31	Nut; (M20x2.5-Thd)	8
8T***41	Bolt-Plt; (M20 X 2.5 X 70)	8

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253-3268 Bracket Gp-Mounting

25***68	Bracket Group-Mounting	1
25***57	Bracket As	1
8T***23	Washer-Plated; (22x35x3.5-mm Thk)	8
8T***31	Nut; (M20x2.5-Thd)	4

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259-1763 Bracket Gp-Mounting

22***31	Bracket As	1
25***63	Bracket Group-Mounting	1
6V***76	Nut-Lock; (M24 X 3.0)	8
7X***54	Bolt; (M24x3.0x110mm)	8

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205-5902 Compactor Gp-Vibratory

0S***29	Bolt (1" Long)	8
19***36	Seal; (85.6mm Od)	1
1J***76	Seal-O-Ring; (202.79mm Id)	1
20***02	Compactor Group-Vibratory	1

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205-5901 Compactor Gp-Vibratory

1K***70	Nut (National Coarse)	32
1P***77	Flange-Half (For Tilt Ports On Valve)	8
20***96	Frame As	1
20***97	Compactor As	1

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222-3780 Compactor Gp-Vibratory

22***80	Compactor Group-Vibratory	1
7X***65	Bolt; (M20x2.5x100-mm)	2
8T***31	Nut; (M20x2.5-Thd)	2
8T***39	Washer; (6.0mm Thk)(M21.5x6x45mm)	2

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205-5900 Compactor Gp-Vibratory

1K***70	Nut (National Coarse)	32
1P***76	Flange-Half (Hose To Pump); Flange-Half (32.54mm Bore)	4
1P***77	Flange-Half (For Tilt Ports On Valve)	4
20***93	Frame As	1

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230-8791 Plate Gp-Stop

15***17	Cap-Dust	1
15***18	Cap-Dust	1
15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1

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CVP40 serial number reference

The ID/PIN plate on the CVP40 is riveted to the compactor housing or top frame near the coupler mount, the same spot used on Cat's other pin-on plate compactors. Read it as an 8-character PIN: the first 3 letters are the prefix identifying the CVP40 product line, followed by a sequential unit number. Since this is a passive hydraulic work tool with no engine, the plate carries only the model and PIN, no engine or ECM data.

Prefix	Identifies	Notes
CRT	CVP40 vibratory plate compactor, all production	Only confirmed prefix for the CVP40, running CRT1-Up. Passive hydraulic attachment, no engine or ECM, so no fault-code or ECM-based dating applies. Fits Cat backhoe loaders (416-446 range) and compact excavators (307, 308CR) via pin-on, pin-grabber, pin-lock, CW, or S-type couplers; no distinct sub-variant prefixes found for different coupler options. Shares one parts book with the CVP16 (A1E), CVP75 (CSG), and CVP110 (CTZ) siblings, but CRT is specific to the CVP40 line item in that book.

Frequently asked questions

What engine does the Cat CVP40 use?

None. The CVP40 is a passive attachment with no engine, fuel system, or ECM. It runs entirely off the host carrier's auxiliary hydraulic circuit, drawing roughly 69-87 L/min (18-23 gpm) at 12,400-17,200 kPa (1,800-2,500 psi) from a mini excavator in the 6-10 metric ton class or a compatible backhoe loader.

What does the CVP40 weigh?

It depends on which generation and bracket. The earlier design lists 401 kg (884 lb) with a 584 x 965 mm plate. The current, relaunched CVP40 lists 350 kg (771.6 lb) with a 590 x 980 mm plate. Add extra weight for the mounting bracket type and any bolt-on backfill blade.

What replaced the CVP40, and is it still current?

Nothing replaced it — the CVP40 name is still active. Caterpillar relaunched the CVP40 alongside new CVP28 and CVP55 models and an updated CVP16 as part of a four-model vibratory plate compactor lineup. Impulse force (about 40 kN) and impact frequency (about 2,200 blows per minute) carried over from the earlier design into the current one.

What CVP40 owners discuss

What hydraulic flow and pressure does the CVP40 actually need from the carrier?

Owners running the CVP40 on a mini excavator or backhoe loader size the auxiliary circuit to roughly 69-87 L/min (18-23 gpm) with a minimum operating pressure around 13 000 kPa (1,885 psi). It is a passive tool with no engine or ECM of its own, so every bit of power comes from the host machine's pump. Undersized flow just gives weak impact force; the bigger complaint on forums is carriers whose relief and flow are mismatched high, which shortens motor life rather than improving compaction. Confirm the carrier's rated aux flow and pressure against the plate's spec plate before hooking up.

Can running the CVP40 on the wrong circuit damage the hydraulic motor?

Yes, and this is the most repeated warning in attachment threads. If the carrier's auxiliary circuit is plumbed closed-center or shares a line with a thumb/clamp circuit that has no open return to tank, back pressure builds in the return line and blows the motor's shaft seal, which then weeps or drips oil at the case-drain fitting. The fix reported by owners is running the compactor only off a true open-circuit auxiliary line with a dedicated return to tank, not off a circuit built for a different tool. If a seal has already let go, have your dealer verify the circuit configuration before the motor goes back in service.

What wear pattern shows up on the isolator/shock mounts between the exciter and top frame?

The rubber isolators that carry the exciter housing inside the top frame harden, crack, or separate from their metal backing plates with age and heavy duty cycles. Once that happens, vibration that should stay in the plate transmits straight up through the mounting bracket into the coupler pins and the boom/stick, which operators feel as chatter in the cab and which accelerates pin and bushing wear at the quick coupler. The community consensus is to inspect the isolators for cracking, tearing, or bulging on a routine basis and to replace them as a set rather than one at a time, since mismatched mount stiffness re-introduces the same vibration transfer.

How does the exciter housing hold up, and what's the tell that bearings are going?

The exciter shaft bearings and seals are the wear items inside the housing. Reported symptoms ahead of a failure are oil weeping at the housing seam or vent, a noticeable change in the vibration frequency or 'feel' of the impact, and new noise under load. Left running, worn exciter bearings drop compaction output and run hotter, which speeds up the same wear. Routine bearing lubrication on the interval called out in the operation and maintenance manual is the standard preventive step owners cite; a housing that is already weeping oil or making noise is a case to have your dealer verify before continuing to run it.

Is there a typical base-plate wear pattern on this class of compactor?

The base plate absorbs most of the abuse: corner gouging, cracking, and prior weld repairs are the flags called out most often, especially on units that saw rocky subgrade or were worked hard against curb and edge conditions on patch work. A plate with heavy pitting or distortion compacts less evenly and is treated as a red flag on a used unit even if the exciter and hoses check out fine.

What coupler and mounting issues come up when swapping the CVP40 on and off a carrier?

Because the tool carries pressure, return, and sometimes a case-drain line, trapped pressure can lock the quick-connect couplers when disconnecting; the workaround owners use is loosening fittings slowly to bleed residual pressure before pulling the couplers rather than forcing them. On the bracket side, mounting ears and pin spacing are not universal across carrier classes, so a bracket sized for one pin-on/pin-grabber/CW/S-type coupler will not bolt straight onto a different coupler style without swapping the bracket to match.

What should I check before buying a used CVP40?

Confirm which generation and weight class you are looking at, since the CVP40 name has covered an earlier heavier configuration and a later lighter one, and match the mounting bracket and coupler style to your own carrier before assuming fit. Walk the base plate for cracks, gouging, or weld repair at the corners. Check the isolator mounts between exciter and frame for cracking, hardening, or separation. Look at the exciter housing for oil weep at seams and listen for bearing noise on a test run. Inspect hoses, quick-connect couplers, and fittings for cracking or leaks, and ask for service records showing bearing lubrication was kept current. Run it briefly on a carrier whose flow and pressure match the plate's rating rather than judging it on an undersized test machine. Have your dealer verify hydraulic motor condition and isolator wear before you rely on it for daily production.

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

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