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Jcb VMF90(VMF90)

Maintenance schedule, common problems & OEM parts breakdown

The JCB VMF90 is a hydraulic powerpack within the JCB Light Equipment range, designed for construction, agriculture, and estate management applications. It functions as a mobile hydraulic power source for attachments such as breakers, pumps, and drills. The unit is powered by a diesel engine, typically a JCB DieselMax or similar compact industrial engine, providing high-pressure hydraulic flow to drive auxiliary tools. Operating weight and dimensions vary by configuration and attachment package, but the unit is classified as light equipment rather than a primary earthmoving machine. The VMF90 is part of the broader JCB powerpack lineage, which includes the Beaver and Compact powerpack series, offering versatile power solutions for site work.

Across the JCB light equipment range, generations have shifted toward more compact designs and improved fuel efficiency while maintaining high hydraulic output. The VMF90 remains relevant in the used market due to the widespread adoption of JCB hydraulic attachments and the durability of JCB diesel engines. Its modular design allows for easy maintenance and part interchangeability with other JCB power units. The machine's value lies in its ability to power multiple tools from a single source, reducing the need for separate gasoline or electric units, making it a cost-effective solution for utility and demolition contractors.

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.

Jcb VMF90(VMF90) specifications

Engine

ModelNot documented for this exact serial range — verify with your dealer
Gross/Net PowerNot documented for this exact serial range — verify with your dealer
DisplacementNot documented for this exact serial range — verify with your dealer
CylindersNot documented for this exact serial range — verify with your dealer
Emissions TierNot documented for this exact serial range — verify with your dealer

Weights

Operating WeightNot documented for this exact serial range — verify with your dealer
Shipping WeightNot documented for this exact serial range — verify with your dealer
Ground PressureNot documented for this exact serial range — verify with your dealer

Dimensions

Transport LengthNot documented for this exact serial range — verify with your dealer
Transport WidthNot documented for this exact serial range — verify with your dealer
Transport HeightNot documented for this exact serial range — verify with your dealer
Wheelbase/Track GaugeNot documented for this exact serial range — verify with your dealer
Ground ClearanceNot documented for this exact serial range — verify with your dealer

Performance

Travel SpeedsNot documented for this exact serial range — verify with your dealer
Class-Relevant PerformanceNot documented for this exact serial range — verify with your dealer
GradeabilityNot documented for this exact serial range — verify with your dealer

Service Capacities (Summary)

Fuel TankNot documented for this exact serial range — verify with your dealer
Hydraulic SystemNot documented for this exact serial range — verify with your dealer
Engine OilNot documented for this exact serial range — verify with your dealer
Cooling SystemNot documented for this exact serial range — verify with your dealer

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

Jcb VMF90(VMF90) maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil, hydraulic tank sight gauge, coolant expansion tank, and fuel levels.
  • Perform 360-degree leak walk around engine bay, axles, kingpost, and swing pivot.
  • Inspect tires or tracks for pressure, cut damage, and track sag.
  • Check hoses and cylinders for chafing, seepage, and rod scoring.
  • Inspect GET (teeth, cutting edge, pins) and safety systems (seat belt, mirrors, alarms).
Every 500 h
  • Change engine oil and filter using JCB Engine Oil Special or equivalent 15W-40 diesel oil.
  • Replace primary and secondary fuel filters to protect common-rail injectors.
  • Inspect hydraulic return filter magnet for metallic debris.
  • Collect oil samples from engine, hydraulic, axle, and final drive systems.
  • Replace or clean air filter primary element per restriction indicator.
  • Grease all pivot points including boom, arm, bucket, and kingpost.
Every 1,000 h
  • Drain, flush, and refill cooling system with JCB-spec long-life coolant.
  • Change transmission oil and filter (backhoe torque converter and wheel loaders).
  • Change front and rear axle oil including hubs on wheeled machines.
  • Perform full ECM diagnostic scan via JCB ServiceMaster tool.
  • Interpret hydraulic oil samples against the 500-hour baseline.
  • Check turbocharger shaft play, boot condition, and wastegate function.
  • Torque check slew ring bolts on JS-series excavators.
  • Measure complete undercarriage against JCB wear limits.
Every 2,000 h
  • Change hydraulic oil: full drain, clean tank, refill with JCB-spec oil.
  • Inspect structural components (boom, arm, loader arm, chassis) for cracking.
  • Measure swing ring play (radial and axial) on JS-series excavators.
  • Service brakes: check disc wear and immersed brake condition.
  • Check injector spray pattern via diagnostic tool and replace as required.
  • Service cab HVAC: check A/C pressure, evaporator condition, and cabin filter.
  • Perform complete electrical system testing.

Servicing the VMF90(VMF90) beyond the schedule

Predictive Maintenance & Fluid Analysis

At the 500-hour interval, collect oil samples from the engine, hydraulic system, axle, and final drive to establish a baseline. Inspect the hydraulic return filter magnet for metallic debris before disposal. Monitor the hydraulic oil condition closely, as contamination is a primary cause of failure in high-pressure powerpacks. Use JCB-spec hydraulic oil to ensure proper component protection. Regular fluid analysis allows for early detection of wear patterns in the engine and hydraulic pump, preventing catastrophic failure and extending the service life of the VMF90.

Corrective & Common Repairs

Common repairs on the VMF90 involve the hydraulic pump and engine fuel system. Replace primary and secondary fuel filters at 500 hours to protect common-rail injectors from dirt. Check hydraulic hoses and fittings for chafing and pinhole seepage, especially at the kingpost and boom connections. Inspect the engine belt tension and condition regularly. If hydraulic pressure drops, check the pump relief valves and filter blockages. Address small leaks immediately to prevent system contamination and environmental issues, ensuring the powerpack remains operational and safe.

Overhaul & Rebuild Points

The 2000-hour service is the critical overhaul point for the VMF90. Perform a full hydraulic oil change, draining the tank and cleaning it thoroughly before refilling with JCB-spec oil. Inspect the structural frame and boom for cracking or unauthorized welding. Check the swing ring play if applicable to the specific configuration. Service the brakes and check the immersed brake condition. Inspect the turbocharger shaft play and wastegate function. These deep-dive inspections confirm the machine's health and determine if major component rebuilds are needed to extend its useful life.

Seasonal & Environment Servicing

In cold weather, use low-temperature diesel fuel and consider cold weather starting aids. Check coolant mixture for freeze protection, ensuring it starts to freeze at -36°C (-33°F) with a 55% antifreeze mix. In hot conditions, monitor engine oil temperature and ensure the cooling system is clean. Clean the undercarriage and engine bay regularly to prevent debris buildup that can cause overheating. Store the VMF90 under cover when possible to protect hydraulic seals and electrical components from weather damage, ensuring reliable operation in all seasons.

VMF90(VMF90) common service parts

Part numberPart
6025/20295Air Filter Complete, AssemblyCheck fitment →
6035/20536FilterCheck fitment →
6035/20528FilterCheck fitment →
5412/22287FilterCheck fitment →
6900/64106FilterCheck fitment →

Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.

VMF90(VMF90) fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
P0087Fuel rail/system pressure too lowClogged fuel filters or failing lift pumpCheck fuel filter condition and fuel pump operation
P0117Engine coolant temperature sensor circuit low voltageFaulty coolant temperature sensor or wiring issueInspect sensor connector and wiring harness for damage
P0521Engine oil pressure sensor range/performance issueFaulty oil pressure sensor or low oil levelVerify oil level and test sensor resistance
P2047DEF/AdBlue injector circuit open (SCR system fault)Open circuit in reductant injector wiringCheck injector connector and wiring for corrosion
U0100Lost communication with Engine Control Module (ECM)Loose battery terminals or damaged CAN bus wiringCheck battery voltage and ground strap connections
101Low transmission clutch pressure detectedTransmission hydraulic pressure lossCheck transmission fluid level and pressure sensor

Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.

VMF90(VMF90) attachments & work tools

Handheld Breakers

The VMF90(VMF90) serves as a hydraulic power source for handheld breakers such as the HM25LV. The HM25LV utilizes unique JCB patented active hydraulic suspension to dispense with traditional springs and bushes, achieving single axis vibration of 1.6m/s². This configuration provides ultra-low hand-arm vibration levels when paired with the VMF90(VMF90) powerpack.

Earth Drills

The VMF90(VMF90) powers the JCB hand-held Earth Drill, which is capable of drilling holes up to 305mm in diameter. The unit features a hydraulic drive system and includes safety features such as an automatic return-to-neutral controller. It is designed for portability and efficient hole creation in estate management and construction applications.

Pumps

The VMF90(VMF90) supports JCB submersible trash pumps and clear water pumps. These units are characterized by self-priming capabilities, run-dry protection, and durability for handling solids. They are designed for minimal maintenance requirements in construction and agriculture settings.

Powerpacks

The VMF90(VMF90) is classified within the JCB Light Equipment range as a powerpack unit. It provides hydraulic flow and pressure to operate various handheld tools and attachments. The machine is part of a range that includes powerpacks, breakers, pumps, and vibratory rammers for versatile job site applications.

All VMF90(VMF90) assemblies by section

Every catalogued assembly group for the Jcb VMF90(VMF90). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

A Vmf 130 B
A1-25-1 Wheel Transport
20***55Screw, Hex, M10x551
20***70Screw1
20***25Screw, Hexagon M10x251
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A1-21-1 Decals
27***16Decal, Jcb Vibromax, Black2
27***00Decal1
40***02Decal, Ear Protection1
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A1-24-1 Roller Set
21***15Nut16
21***00Nut, M164
22***24Washer8
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A1-10-1 Camshaft
60***90Camshaft1
60***92Arm2
60***93Tappet2
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A1-12-1 Fan Cover
60***13Screw6
60***14Screw1
60***48Switch; Ss To 60***05 - 23/08/07, By Iris Schaeffer1
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A1-2-1 Upper Section
20***60Screw, Hex, M12x602
20***25Screw, Hexagon M8x251
20***25Screw, Hexagon M10x254
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A1-5-1 Crankelcase
60***48Governor2
60***49Bracket1
60***50Pin2
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A1-15-1 Carburettor
20***08Screw2
20***08Screw1
23***12Pin1
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A1-9-1 Piston & Con-Rod
60***85Rod, Connecting1
60***86Rod, Connecting1
60***87Screw2
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A1-23-1 Dampening Plate
20***35Screw, Hexagon M8x353
21***00Nut, M83
41***52Spacer3
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A1-8-1 Crankshaft Assembly
60***77Crankshaft1
60***31Screw1
60***32Washer1
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A1-20-1 Protective Structure
20***35Screw, Hexagon M10x354
21***00Nut4
22***10Washer, M102
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A1-18-1 Fuel Tank
60***28Filter1
60***32Filler1
60***33Bracket1
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A1-19-1 Ignition Coil
A1-30-1 Throttle, Kit
20***10Screw2
20***25Pin1
21***08Nut, M8, Din 9341
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A1-4-1 Cylinder Head
60***03Gasket1
60***44Stud2
60***45Pin2
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A1-6-1 Flywheel
60***70Vent1
60***72Flywheel1
60***73Nut1
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A1-1-1 Tamping Plate
20***30Screw, Hexagon M10 X 301
20***16Capscrew, M6x168
23***25Key1
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A1-3-1 Clutch
20***10Screw4
23***62Circlip1
23***35Circlip2
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A1-13-1 Recoil Starter
60***60Motor1
60***61Housing1
60***62Cable1
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A1-22-1 Sprinkiling
20***12Screw, Hexagon M8x122
20***35Screw, Hexagon M8x352
20***30Screw, Hexagon M10 X 302
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A1-17-1 Exhaust System
20***08Screw3
20***08Screw4
21***08Nut, M8, Din 9342
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A1-7-1 Cover, Housing
27***50Bearing1
60***06Dipstick1
60***57Seal1
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A1-14-1 Speed Governor
60***13Screw2
60***19Rod1
60***34Spring1
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A1-16-1 Air Filter
60***38Nut2
60***82Plate1
60***84Screw1
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B Vmf 130d
B1-19-1 Speed Control
20***12Screw2
21***05Nut1
54***72Bracket1
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B1-8-1 Cylinder Head
20***35Capscrew, M6x352
21***08Nut, Hex, M82
54***01Gasket1
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B1-20-1 Protective Structure
20***35Screw, Hexagon M10x354
22***10Washer, M102
60***00Guard1
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B1-25-1 Wheel Transport
20***55Screw, Hex, M10x551
20***70Screw1
20***25Screw, Hexagon M10x251
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B1-7-1 Piston & Con-Rod
54***13Ring, Retaining2
54***14Screw2
54***43Kit-Piston Ring1
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B1-4-1 Crankelcase
20***16Capscrew, M6x161
54***11Dipstick1
54***70Casing1
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B1-3-1 Clutch
23***68Circlip1
23***40Circlip2
27***83Bearing1
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B1-23-1 Plate, Dampening
20***35Screw, Hexagon M8x353
21***00Nut, M83
41***52Spacer3
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B1-16-1 Fuel Tank
20***16Capscrew, M6x162
20***25Stud2
21***06Nut, M62
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B1-24-1 Roller Set
21***15Nut16
21***00Nut, M164
22***24Washer8
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B1-21-1 Decals
27***16Decal, Jcb Vibromax, Black2
27***00Decal1
40***02Decal, Ear Protection1
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B1-14-1 Air Duction
20***25Capscrew, M6x251
21***06Nut, M612
54***31Plate1
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B1-1-1 Tamping Plate
20***30Screw, Hexagon M10 X 301
20***16Capscrew, M6x168
23***25Key1
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B1-30-1 Throttle, Kit
20***10Screw2
20***25Pin1
21***08Nut, M8, Din 9341
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B1-15-1 Crankelcase, Breathing System
54***25Oil1
54***26Element1
54***27Breather1
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B1-11-1 Flywheel
20***20Screw6
54***25Flywheel1
54***26Fan1
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B1-2-1 Upper Section
20***60Screw, Hex, M12x602
20***25Screw, Hexagon M10x254
20***20Capscrew, M8x201
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B1-10-1 Timing Cover
20***12Capscrew, M6x121
20***45Capscrew, M8x452
20***50Screw10
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B1-18-1 Exhaust System
20***90Screw1
22***08Washer, M82
22***06Washer, M62
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B1-12-1 Injection Equipment
20***30Capscrew, M6x301
54***00Nozzle1
54***01Holder1
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B1-6-1 Camshaft
54***30Camshaft1
54***31Cam1
54***32Shim2
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B1-13-1 Recoil Starter
20***18Screw1
20***10Capscrew, M6x107
49***81Washer3
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B1-17-1 Air Filter
B1-9-1 Oil Pump, Govener
20***08Screw2
54***30Cover1
54***31Ring1
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B1-5-1 Crankshaft Assembly
23***40Circlip1
54***12Shaft1
54***15Crankshaft1
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B1-22-1 Sprinkling
20***12Screw, Hexagon M8x122
20***35Screw, Hexagon M8x352
20***30Screw, Hexagon M10 X 302
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C Vmf 90
C1-10-1 Carburettor
60***23Gasket2
60***45Carburretor1
60***46Valve, Throttle1
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C1-9-1 Recoil Starter
50***20Spring1
50***23Set Of Srews1
51***60Unit, Recoil Starter1
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C1-12-1 Electric
51***22Screw2
51***23Screw2
60***04Heater1
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C1-5-1 Crankshaft Assembly, Piston
51***74Ring, Retaining2
60***01Key1
60***40Crankshaft; Vendor Code & Part No Changed To 80438, On 01/10/07 See San 23603 Dalanda Balde1
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C1-1-1 Lower Section
13***19Capscrew, M16x90, Grade 12.94
20***16Capscrew, M6x168
20***90Screw4
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C1-17-1 Wheel & Tyre, Carriage
20***30Screw2
21***00Nut, M122
22***12Washer, M122
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C1-14-1 Steering Bow
20***16Screw, Hexagon M10x162
21***03Sleeve2
22***10Washer, M102
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C1-6-1 Exhaust System, Intake
51***87Retainer, Spring2
51***90Valve, Cone4
60***94Screw1
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C1-18-1 Sprinkling
20***20Screw, Hexagon M10x202
20***10Screw2
20***20Capscrew, M8x202
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C1-16-1 Plate, Vulkollan
20***55Screw, Hex, M10x553
21***00Nut, M103
22***10Washer, M103
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C1-4-1 Crankcase, Cylinder Head
51***15Ball, Shaft1
51***16Valve2
51***17Ring1
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C1-13-1 Accessory
C1-7-1 Air Filter
60***95Air Filter Complete, Assembly1
60***96Bracket1
60***97Gasket1
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C1-2-1 Engine, Upper Structure
20***22Screw; Ss To 14***041
20***65Screw2
20***30Screw, Hex M8 X 301
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C1-8-1 Speed Governor
50***32Nut1
51***37Nut1
60***34Screw2
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C1-3-1 Clutch
23***55Circlip1
23***30Circlip1
27***63Bearing1
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C1-15-1 Decals
27***13Decal, Ce, 106 Db1
27***17Decal1
40***02Decal, Ear Protection1
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C1-19-1 Engine, Control
20***10Screw2
20***25Pin1
21***08Nut, M8, Din 9341
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C1-11-1 Fuel Tank
23***09Clamp2
60***27Filter1
60***29Hose1
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C2-1-1 Engine
D Vmf 70
D1-2-1 Upper Section
20***22Screw; Ss To 14***041
20***65Screw2
20***30Screw, Hex M8 X 301
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D1-11-1 Fuel Tank
23***09Clamp2
60***27Filter1
60***29Hose1
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D1-7-1 Air Filter
60***95Air Filter Complete, Assembly1
60***96Bracket1
60***97Gasket1
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D1-8-1 Speed Governor
50***32Nut1
51***37Nut1
60***34Screw2
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D1-10-1 Carburettor
60***23Gasket2
60***45Carburretor1
60***46Valve, Throttle1
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D1-19-1 Engine, Control
20***10Screw2
20***25Pin1
21***08Nut, M8, Din 9341
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D1-16-1 Plate, Vulkollan
20***55Screw, Hex, M10x553
21***00Nut, M103
22***10Washer, M103
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D1-12-1 Electric
51***22Screw2
51***23Screw2
60***04Heater1
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D1-17-1 Wheel & Tyre, Carriage
20***30Screw2
21***00Nut, M122
22***12Washer, M122
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D1-18-1 Sprinkling
20***20Screw, Hexagon M10x202
20***10Screw2
20***20Capscrew, M8x202
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D1-6-1 Exhaust System, Intake
51***87Retainer, Spring1
51***90Valve, Cone1
60***94Screw1
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D1-1-1 Lower Section
13***19Capscrew, M16x90, Grade 12.94
20***16Capscrew, M6x168
20***90Screw4
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D1-9-1 Recoil Starter
50***20Spring1
50***23Set Of Srews1
51***60Unit, Recoil Starter1
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D1-13-1 Accessory
D1-5-1 Crankshaft Assembly, Piston
51***74Ring, Retaining2
60***01Key1
60***40Crankshaft; Vendor Code & Part No Changed To 80438, On 01/10/07 See San 23603 Dalanda Balde1
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D1-14-1 Steering Bow
20***16Screw, Hexagon M10x162
21***03Sleeve2
22***10Washer, M102
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D1-15-1 Decals
27***18Decal1
27***17Decal1
40***02Decal, Ear Protection1
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D1-4-1 Crankcase, Cylinder Head
51***15Ball, Shaft1
51***16Valve2
51***17Ring1
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D1-3-1 Clutch
23***55Circlip1
23***30Circlip1
27***63Bearing1
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Frequently asked questions

What engine does the JCB VMF90 use?

The VMF90 is powered by a JCB DieselMax or similar compact industrial diesel engine, designed for high efficiency and durability in light equipment applications.

What is the operating weight of the VMF90?

The operating weight varies by configuration and attachment package. Specific weight data for the VMF90 is not provided in the general specifications; consult the machine's type plate or dealer documentation for exact figures.

What replaced the VMF90?

The VMF90 is part of the ongoing JCB Light Equipment range. Specific successor models or replacements are not documented in the available sources; consult JCB official literature for current model lineups.

What VMF90(VMF90) owners discuss

What is the known behavior of the forward/reverse shuttle system on older JCB backhoe loaders regarding electrical solenoids?
The forward/reverse lever operates microswitches that activate hydraulic solenoids on the transmission body. A common failure is the forward solenoid not energizing or the inhibitor switch failing, resulting in full power in reverse but no movement in forward. Verification involves checking if a screwdriver blade is attracted to the reverse solenoid but not the forward one when the lever is in the forward position. Have your dealer verify the solenoid circuit integrity.
What are the typical undercarriage or drive chain maintenance concerns for JCB skid steer loaders?
Drive chain tension is critical; loose chains can hammer the motors and other drive components. Proper tensioning is required to prevent premature wear on the drive system. Have your dealer verify chain tension and motor condition.
What engine starting issues are commonly reported for JCB industrial engines?
Difficulty starting is a frequent issue, often caused by simple battery problems or complex fuel system faults. Owners report stubborn starting, black smoke, and multiple ignition attempts, particularly on older Perkins 3-cylinder injection diesel engines. Check the fuel filter, fuel lines, injector, and pump for blockages or leaks. Have your dealer verify the fuel delivery system.
What is the typical operating weight and net engine power for the JCB 90Z-1 compact excavator?
Operating weight is 8,605 kg (18,975 lb) to 9,733 kg (21,458 lb). Net engine power is 52.3 kW (70.2 hp). These values vary by configuration and counterweight.
What is the typical operating weight and net engine power for the JCB 85Z-1 midi excavator?
Operating weight is 8,300 kg (18,298 lb) to 8,600 kg (18,960 lb). Net engine power is 45.4 kW (60.9 hp).
What serial number range applies to the JCB VMF90 light equipment attachment?
The VMF90 is listed under the Attachments Division - Pedestrian category with serial number range: OEM part reference.
What should be checked when buying a used JCB VMF90 or similar light equipment attachment?
Verify the serial number falls within the correct range for the specific attachment division (e.g., OEM part reference for VMF90). Check for physical damage to the hydraulic lines and mounting points. Ensure the attachment is compatible with the host machine's hydraulic flow and pressure specifications. Have your dealer verify the attachment's service history and hydraulic integrity.

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

Serial-range & configuration variants

This page covers the Jcb VMF90(VMF90). Related factory variants of the same model family:

VMF90(VMF90)

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