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Jcb G500QX(JCB GENERATOR)

Maintenance schedule, common problems & OEM parts breakdown

The JCB G500QX is a 500 kVA standby-rated diesel generator within the QX series, designed for static power applications in construction, mining, and industrial sectors. It utilizes a Scania DC13-072A six-cylinder engine with an electrical governor, paired with a MeccAlte HM335A2 alternator and a DeepSea 7320 or CP1 control panel. The unit weighs 4,627 kg and measures 450 × 180 × 234 cm. It is part of the 275–780 kVA Scania-powered QX range, which succeeded earlier Deutz and Sisu-powered models in the JCB Premier line. Configurations include sound-attenuated canopies, bunded fuel tanks, and optional LiveLink telematics.

The QX series transitioned from smaller displacement engines to high-capacity Scania power units, emphasizing extended service intervals and fuel efficiency for standby duty. This shift increased the machine's relevance in the used market as a reliable, high-output solution for sites requiring minimal downtime. The G500QX remains sought after for its robust steel construction, 100% biodiesel capability, and integration with JCB’s global parts network, distinguishing it from lower-tier competitors with shorter maintenance cycles.

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 G500QX(JCB GENERATOR) specifications

Engine

ModelScania DC13-072A
Configuration6-Cylinder with Electrical Governor
Emissions TierTier IIIa (also available)

Weights

Operating Weight (with all fluids, except fuel)2917 kg (6430 lb)
Shipping Weight4627 kg (10199 lb)

Dimensions

Transport Length3600 mm (11 ft 10 in)
Transport Width1460 mm (4 ft 9 in)
Transport Height2096 mm (6 ft 10 in)
Alternative Dimensions (varies by configuration/series)4500 × 1800 × 2340 mm (14 ft 9 in × 5 ft 11 in × 7 ft 8 in)

Performance

Prime Power Rating450 kVA / 360 kW (varies by configuration/series: 461 kVA / 369 kW)
Standby Power Rating500 kVA / 400 kW (varies by configuration/series: 501 kVA / 401 kW)
Output Voltage400/230 V, 50 Hz
Current per Phase728 A

Service capacities (summary)

Fuel Tank Capacity740 L (195 gal) Bunded Integrated

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

Jcb G500QX(JCB GENERATOR) maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level via ground-level dipstick.
  • Check hydraulic tank sight gauge.
  • Check coolant expansion tank level.
  • Check fuel level and inspect for leaks.
  • Inspect hoses, cylinders, and fittings for chafing or seepage.
  • Verify track tension and roller condition on undercarriage.
Every 250 h
  • Inspect alternator and drive belt tension.
  • Clean or replace primary air filter per restriction indicator.
  • Inspect battery electrolyte level on non-sealed units.
  • Lubricate all pivot points including boom, arm, and kingpost.
  • Inspect slew ring bolts and torque to specification.
  • Check track sag and measure wear against limits.
Every 500 h
  • Replace engine oil and oil filter using JCB Engine Oil Special or equivalent 15W-40.
  • Replace primary and secondary fuel filters.
  • Inspect hydraulic return filter magnet for metallic debris.
  • Collect oil samples from engine, hydraulic, and axle systems.
  • Inspect structural components for unauthorized welding or cracking.
  • Check turbocharger shaft play and charge cooler boot condition.
Every 1,000 h
  • Drain, flush, and refill coolant with JCB-spec long-life coolant.
  • Replace transmission oil and filter.
  • Replace front and rear axle oil including hubs.
  • Perform full ECM diagnostic scan via JCB ServiceMaster tool.
  • Interpret hydraulic oil samples against 500-hour baseline.
  • Load test alternator and starter to identify failing components.
Every 2,000 h
  • Drain hydraulic tank, clean tank, and refill with JCB-spec hydraulic oil.
  • Measure swing ring play using dial indicators.
  • Inspect brake disc wear and immersed brake condition.
  • Check injector spray patterns via diagnostic tool.
  • Service cab HVAC including evaporator and cabin filter.
  • Inspect complete electrical system for corrosion or damage.

Servicing the G500QX(JCB GENERATOR) beyond the schedule

Predictive Maintenance & Fluid Analysis

Collect baseline oil samples from the engine, hydraulic tank, and axle systems at the 500-hour interval. Compare subsequent samples against this baseline to detect bearing wear or contamination early. Monitor the hydraulic return filter magnet for metallic debris during every 500-hour service. Use the DeepSea control panel to track engine hours and fuel consumption trends. Early detection of fluid degradation prevents premature alternator winding failure and Scania engine damage.

Corrective & Common Repairs

Replace the primary and secondary fuel filters at 500 hours to protect the Scania common-rail injectors from contamination. Inspect the three-stage fuel filtration system for water accumulation and drain as needed. Check the MeccAlte alternator excitation system for winding insulation breakdown. Replace worn drive belts and inspect the DeepSea control panel connections for corrosion. Addressing these items prevents voltage instability and engine stalling under load.

Overhaul & Rebuild Points

At 2,000 hours, measure swing ring play and radial/axial clearance to determine if bearing replacement is required. Inspect the turbocharger shaft play and charge cooler boot integrity for air leaks. Check injector spray patterns and replace nozzles showing signs of coking or poor atomization. Evaluate the structural chassis and side frames for cracking or unauthorized welding. These checks define the machine's readiness for extended service life.

Seasonal & Environment Servicing

Install the engine block heater for operation in temperatures below freezing to ensure reliable cold starts. Inspect the sound-attenuated canopy seals for moisture ingress and replace gaskets if compromised. Clean the heavy-duty air filter more frequently in dusty environments to maintain Scania engine performance. Verify the bunded fuel tank integrity and earth leakage device operation in wet conditions. These steps ensure durability in extreme heat, cold, and humidity.

G500QX(JCB GENERATOR) common service parts

Part numberPart
SC1393641Head, Fuel FilterCheck fitment →
SC1393640Element, Filter, Fuel FeedCheck fitment →
SC1393639Filter, Fuel FeedCheck fitment →
SC1471259Filter, FuelCheck fitment →
SC1763776Element, Fuel FilterCheck fitment →

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

G500QX(JCB GENERATOR) fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
P0087Fuel rail/system pressure too lowClogged fuel filters, failing lift pump, or restricted fuel line.Check fuel filter condition and fuel supply pressure.
P0117Engine coolant temperature sensor circuit low voltageFaulty coolant temperature sensor, open circuit in wiring, or poor ground connection.Inspect sensor wiring harness and connector for damage; test sensor resistance.
P0521Engine oil pressure sensor range/performance issueFaulty oil pressure sensor, low oil level, or sensor circuit malfunction.Verify oil level and condition; inspect sensor electrical connections.
P2047DEF/AdBlue injector circuit open (SCR system fault)Open circuit in the reductant injector wiring or faulty injector solenoid.Inspect injector wiring harness for damage and check connector integrity.
U0100Lost communication with Engine Control Module (ECM)CAN bus network fault, loose connector, or ECM power/ground issue.Check battery voltage and ground straps; inspect CAN bus connectors for corrosion.
P0335Crankshaft Position Sensor 'A' Circuit No SignalFailed crank sensor, damaged wiring, or debris on sensor tip.Inspect sensor and wiring; check sensor gap and signal output.
P0102MAF (Manifold Absolute Flow) Low Voltage FaultFaulty MAF sensor, clogged air filter, or intake air leak.Inspect air intake system for leaks; test MAF sensor signal.
P029BInjector drift fault detection on Injector 2Fuel injector 2 mechanical drift or electrical circuit issue.Inspect injector 2 wiring and connector; test injector performance.

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

G500QX(JCB GENERATOR) attachments & work tools

Power Generation & Fuel Systems

The G500QX utilizes a Scania DC13-072A 6-cylinder engine with an electrical governor, available in Stage IIIA emissions compliant configurations. It is paired with a MeccAlte HM335A2 alternator and a JCB CP1 Auto Type control panel, with DeepSea 7320 panels also noted in standby specifications.

Enclosure & Mobility

The unit is housed in a weatherproof enclosure with heavy-gauge all-steel construction, featuring a 740-liter integrated bunded fuel tank. Mobility is supported by forklift pockets and a central lifting point, with dimensions of 450 × 180 × 234 cm and a weight of 4627 kg.

Electrical & Safety Options

Standard configurations include an 800Amp MCB, CE pack, battery charger, and engine block heater. LiveLink telematics is available as standard with 36 months of data time, providing remote monitoring for fuel levels and maintenance alerts.

Work Tool Compatibility

The G500QX is a stationary power generation unit and does not utilize hydraulic quick-hitch systems, buckets, or mechanical work tools. It serves as a power source for other JCB machinery rather than carrying attachments itself.

All G500QX(JCB GENERATOR) assemblies by section

Every catalogued assembly group for the Jcb G500QX(JCB GENERATOR). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Z Jcb Generator Set
Jcb : G500qx(Jcb Generator) : Z Jcb Generator Set : Z00 Generator Sets
Z1-3-1 Engine, Complete, Dc12 Ems
Z1-1-1 Engine, Complete, Dc12 Ems
32***94Engine, Assembly, Dc12 Ems1
SC***10Tool, Rear Crank Seal1
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Z1-2-1 Engine, Complete, Dc12 Ems
Z1-11-1 Engine, Complete, Dc16 Ems
Z4-1-1 Kit, Cylinder, Gaskets
SC***83Gasket, Manifold, Fuel1
SC***61Gasket, Fuel Feed1
SC***66Gasket, Rocker Cover, Upper1
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Z4-1-10 Gasket Set, Cylinder Head, Dc12 59a
SC***51Gasket, Rocker Cover, Upper1
SC***42Seal, Fuel Feed4
SC***61Gasket, Fuel Feed1
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Z4-1-20 Gasket Set, Cylinder Head, Dc16
SC***83Gasket, Manifold, Fuel1
SC***61Gasket, Fuel Feed1
SC***66Gasket, Rocker Cover, Upper1
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Z4-2-10 Gasket Set, General Overhaul, Dc12
SC***83O Ring1
SC***11O Ring2
SC***85O Ring1
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Z4-2-20 Gasket Sets, General, Overhaul Dc16
33***60Kit-Gasket1
33***84Gasket1
33***92Ring, Sealing4
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Z5-5-10 Kit, Piston, & Liner Dc12
33***21Liner, Cylinder1
33***22O Ring1
33***23O Ring1
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Z5-5-20 Kit,Piston & Liner, Dc16
SC***29Pin, Gudgeon1
SC***87Shim, =0.2mm, Liner0
SC***43Ring, Retaining2
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Z5-1-10 Service Kit, Outer, Turbocharger, Dc12
SC***37Gasket1
SC***71Gasket1
SC***85Element, Oil Filter1
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Z5-5-1 Kit, Piston, & Liner Dc9
33***26Piston, Single Speed1
33***55Kit-Piston & Liner1
33***56Ring, Piston, Compression1
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Z6-2-1 Filter, Water Seperator, Dc9 & Dc12
SC***02Bowl, Fuel Feed1
SC***41Head, Fuel Filter1
SC***40Element, Filter, Fuel Feed1
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Z6-1-1 Fuel Filter, Assembly
33***11Housing, Fuel Filter, Assembly1
33***12Bracket1
33***13Screw, M8 X 501
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Z6-1-20 Fuel Filter, Dc16
SC***57Cover, Fuel Feed1
SC***59Filter, Fuel1
SC***58Pipe, Fuel Feed1
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Z6-2-20 Filter, Water Seperator, Dc16
SC***02Bowl, Fuel Feed1
SC***41Head, Fuel Filter1
SC***40Element, Filter, Fuel Feed1
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Z6-4-10 Filter, Oil, Centrifugal Dc12
33***50Cleaner, Centrifugal Oil, Assembly1
33***51Spring1
33***08Element, Oil Filter1
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Z6-3-20 Filter, Oil, Dc16
SC***08Filter, Oil, Assembly1
SC***54O Ring1
SC***28Tube1
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Z6-4-20 Filter, Oil, Centrifugal, Dc16
SC***83O Ring1
SC***35Nozzle1
SC***85O Ring1
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Z6-3-10 Filter, Oil, Dc12
33***08Element, Oil Filter1
SC***98Adapter1
SC***58Adapter1
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Z6-4-1 Filter, Oil, Centrifugal Dc9
33***49Head, Filter Unit1
33***50Cleaner, Centrifugal Oil, Assembly1
33***51Spring1
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Z6-1-10 Fuel Filter, Dc12
SC***89Head, Filter1
SC***04Plug1
SC***76Element, Fuel Filter1
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Z8-1-1 Front End Drive, Accessories, Fan Belt Dc9
33***88Washer9
33***76Bracket1
33***77Idler, Roller1
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Z8-6-1 Drive, Belt, Guard Dc9
33***70Guard, Drive Belt, Upper Right1
33***71Guard, Drive Belt, Upper Left1
33***72Guard, Drive Belt, Lower1
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Z8-2-20 Fan, Assembly, 965mm Dc16
33***48Bearing1
33***41Bearing, Assembly1
33***42Screw, Flange, M12 X 1404
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Z8-3-1 Front End Drive, Accessories, Alternator & Water Pump Dc9
33***77Idler, Roller1
33***83Idler, Roller1
33***84Adjuster, Belt1
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Z8-2-1 Fan, Pusher 787mm Dc9
33***81Spacer, L = 106mm1
33***82Fan, Pusher 787mm Dia1
SC***50Screw, Flange4
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Z8-3-10 Front End Drive, Accessories, Alternator & Water Pump Dc12
33***23Spacer1
33***24Belt, Poly-V, L=17001
SC***47Bolt, M10x80, Flange Screw1
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Z8-2-10 Fan, Assembly, 912 Mm Dc12
33***21Fan, Pusher, 9 Blades, 912mm1
33***22Screw, M12 X 553
SC***27Washer6
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Z8-5-1 Fan, Cowling Dc9
33***28Plate, Fan Cowling1
33***29Bracket, Upper1
33***30Bracket, Lower1
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Z8-1-10 Front End Drive, Accessories, Fan Belt Dc12
33***25Adjuster, Belt1
33***26Spacer2
33***27Pulley, Idler1
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Z8-4-10 Casing, Transmission, Belt Dc12
33***82Screw, Flange, M8 X 501
33***56Tube, Spacer, L = 10mm1
33***96Washer7
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Z8-5-10 Fan, Cowling Dc12
33***93Washer, Spring3
33***33Seal2
33***16Cowling, Fan1
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Z8-3-20 Front End Drive, Accessories, Alternator & Water Pump Dc16
33***95Belt, Poly-V, L=1795mm1
SC***87Roller, Fan Belt1
SC***65Belt, Drive1
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Z8-1-20 Front End Drive, Accessories, Fan Belt Dc16
SC***11Bolt, Allen, M8 X 35mm6
SC***29Belt1
SC***47Bolt, M10x80, Flange Screw1
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Z8-6-10 Drive Belt Guard, Dc12
33***06Guard, Drive Belt, Upper1
33***07Washer2
SC***05Bracket3
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Z9-2-1 Starter Motor, Dc16
33***01Motor, Starter1
SC***23Stud3
SC***26Plate, Starter Motor1
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Z9-1-1 Starter Motor, Dc9 & Dc12
SC***26Plate, Starter Motor1
SC***48Relay1
SC***11Motor, Starter1
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Z10-1-1 Alternator, 100amp
33***00Alternator1
SC***43Pulley, Alternator1
SC***22Nut1
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Z10-1-10 Alternator, 65amp, Dc12
33***40Alternator, 65a1
33***41Alternator1
33***42Kit-Mounting4
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Z10-1-20 Alternator, 100amp, Dc16
33***00Alternator1
SC***92Sleeve, Guide2
SC***64Alternator1
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Z11-3-20 Cable Retainer, Cylinder Head
33***02Holder, Cable Clamp2
33***03Holder, Cable Bushing2
SC***91Holder, Cable, Clamp8
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Z11-1-10 Ecu Unit, Dc9 & Dc12
33***43Housing, Contact Engine Control Unit, 10-Pol0
SC***91Cover, Engine Control Unit2
SC***61Strap8
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Z11-6-1 Injection Equipment, Harnesses, Dc9
33***07Screw, Self Tapping, M6 X 202
33***20Sensor, Charge Air Pressure1
33***99Harness1
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Z11-5-1 Engine, Harness, Installation Dc9
33***82Screw, Flange, M8 X 502
33***13Screw, M8 X 502
33***45Bracket1
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Z11-5-10 Engine, Cable Installation, Dc12 59a
33***13Screw, M8 X 502
33***45Bracket1
33***46Duct1
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Z11-1-20 Unit, Electronic Control, Dc16
33***43Housing, Contact Engine Control Unit, 10-Pol0
SC***91Cover, Engine Control Unit2
SC***22Bolt8
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Z11-4-20 Protection Plate, & Mounting Bracket, Dc16
SC***89Shield, Heat, Cable Routeing1
SC***56Holder, Cable, Bushing4
SC***30Shield, Heat, Rear Of Engine1
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Z11-2-20 Harnesses, &, Sensors Dc16
33***20Sensor, Charge Air Pressure1
33***04Cable, Harness1
33***05Cable, Harness1
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Z11-3-10 Cables, Retainer, Cylinder Head Dc12 59a
33***44Duct1
SC***03Screw6
SC***69Attaching Plate1
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Z11-4-10 Protection Plates, & Mounting Bracket, Dc12
SC***74Plate, Protective1
SC***63Bracket1
SC***94Plate, Protective1
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Z11-2-10 Harnesses, &, Sensors Dc12 59a
33***90Sensor, Temperature1
33***20Sensor, Charge Air Pressure1
33***54Harness1
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Z12-2-1 Fuel Manifold, Leakoff Pipe
33***22Pipe, Fuel Leak Off, Assembly1
SC***76Clamp, Bleed Assembly.1
SC***90Adapter, Union, Straight1
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Z12-1-20 Fuel Pipes, High Pressure, Dc16
33***17Valve, Overflow1
33***94Seal, Fuel Feed1
33***97Pipe, Fuel1
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Z12-2-20 Fuel Return Pipes, Dc16
33***17Valve, Overflow1
SC***77Nut1
SC***65Bolt1
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Z12-1-10 Fuel Pipes, High Pressure, Dc12 59a
33***17Valve, Overflow1
33***19Bolt, Banjo6
33***21Clamp3
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Z12-1-1 Fuel System, Without Compressor
33***14Pipe, Fuel Assembly1
33***15Bracket1
33***16Pipe, Fuel Assembly1
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Z13-1-1 Fuel Injector, Dc9 & Dc12
33***52Holder, Fuel Injector5
33***53Screw, Flange, M10 X 405
33***91Injector, Assembly5
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Z13-1-20 Fuel Injector, Dc16
SC***64O Ring, Injector8
SC***73Nozzle, Injector, Fuel1
SC***39Washer, Injector8
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Z15-1-1 Fuel Feed Pump, Dc9 & Dc12
SC***11O Ring1
SC***19Screw, M8 X 302
SC***09Screw2
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Z15-1-20 Fuel Lift Pump, Dc16
33***96Sleeve, Coupling1
SC***70Seal, O-Ring1
SC***19Screw, M8 X 302
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Z16-1-20 Water Pump, Dc16
SC***64Gasket, Water Pump1
SC***21Screw, M8 X 404
SC***25Screw, M8 X 608
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Z16-1-10 Water Pump, Dc12 59a
33***30Ring, Sealing1
33***31Pulley1
33***36Kit-Repair, Water Pump0
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Z16-1-1 Water Pump, Dc9
33***78Pump, Water1
33***79Housing, Water Pump1
33***80Ring, Sealing1
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Z17-2-20 Water Bleed Pipe, Dc16
SC***89Pipe, Bleed Assembly.1
SC***15Hose, Bleed Assembly.1
SC***86Connector, Bleed Pipe8
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Z17-2-10 Water Bleed Pipe, Dc12 59a
33***34Bolt, Banjo1
33***35Bolt, Banjo5
SC***24Banjo, Connector1
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Z17-1-10 Water Inlet, Connector, Dc12 59a
33***32Bracket1
33***33Spacer1
SC***86Connector, Water Inlet1
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Z18-1-1 Thermostat & Housing
33***24Housing, Thermostat1
33***25Cover, Thermostat Housing, Low Turbo1
33***26Cover, Thermostat Housing, High Turbo1
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Z18-1-20 Thermostat & Housing, Dc16
SC***25Screw, M8 X 604
SC***24Thermostat, 83 Degrees1
SC***25Gasket, Thermostat1
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Z18-1-10 Thermostat & Housing, Dc12 59a
SC***85Housing, Thermostat1
SC***19Screw, M8 X 3010
SC***87O Ring1
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Z19-2-20 Crankcase, Breather, Dc16
33***63Pipe, Breather1
33***64Plug1
33***65Clamp, Hose3
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Z19-1-10 Rocker Cover, Dc12
33***11Cover, Rocker, Closed Crankcase Ventilation2
33***12Cover, Rocker, Open Crankcase Ventilation1
SC***51Gasket, Rocker Cover, Upper6
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Z19-1-20 Rocker Cover, Dc16
SC***90Cover8
SC***06Cap, Oil Filler1
SC***66Gasket, Rocker Cover, Upper8
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Z19-2-1 Crankcase, Ventilation, Open Dc9
33***56Tube, Spacer, L = 10mm1
33***65Clamp, Hose3
33***14Hose1
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Z19-1-1 Rocker Cover
33***82Screw, Flange, M8 X 5020
33***83Cover, Rocker1
33***84Cover, Rocker1
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Z19-2-10 Breather Tube, Crankcase, Dc12
SC***20Screw1
SC***82Pipe, Crankcase Breather1
SC***32Nut, Flange M82
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Z20-1-10 Rocker Assembly, Dc12 59a
SC***10Screw, Adjusting1
SC***89Arm, Rocker, Injector6
SC***92Plug, Rivet6
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Z20-1-20 Rocker Assembly, Dc 16
SC***10Screw, Adjusting2
SC***89Arm, Rocker, Injector8
SC***92Plug, Rivet8
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Z21-1-20 Pushrods & Tappets
33***73Tappet, Assembly4
33***74Tappet, Roller2
33***75Tappet, Roller2
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Z21-1-10 Pushrods & Tappets
33***05Bolt3
33***06Rod, Push10
SC***02Circlip2
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Z22-2-1 Turbo Pipework, Solenoid, & Wastegate Valves Dc9
33***29Plug, Screw M10 X91
33***60Bracket1
33***61Valve, Solenoid1
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Z22-1-10 Turbocharger, Dc12 59a
33***19Turbocharger1
SC***92Kit-Service1
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Z22-1-20 Turbocharger, Dc16 44a/45a
Z22-1-1 Turbocharger
Z23-1-1 Turbo Pipework, Dc9
33***10Hose1
33***39Pipe, Lubrication1
33***40Pipe, Return1
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Z23-2-20 Turbo Exhaust, Pipework, Dc16
SC***32Nut1
SC***74Clamp, "V"1
SC***01Pipe1
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Z23-1-10 Turbo Pipework, Dc12
33***09Bracket1
33***10Hose1
SC***71Gasket1
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Z23-2-10 Turbo Exhaust, Pipework, Dc12
SC***33Pipe, Exhaust Elbow1
SC***32Nut1
SC***37Clamp, "V"1
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Z23-1-20 Turbo Pipework, Dc16
SC***44Adapter2
SC***71Gasket1
SC***19Screw, M8 X 302
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Z25-1-10 Air Induction, Manifold, Dc12 59a
33***20Sensor, Charge Air Pressure1
SC***17Manifold, Induction1
SC***31Screw, M8 X10024
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Z25-1-1 Air Induction, Manifold, Dc9
33***46Manifold, Induction1
SC***31Bolt, M8x100, Flange Screw20
SC***11Seal1
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Z25-1-20 Manifold, Induction, Dc16
33***87Manifold, Induction1
33***88Manifold, Induction1
SC***58Pipe, Flange2
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Z26-2-20 Manifold, Exhaust, Heat Shield Dc16
33***90Shield, Heat2
33***91Bracket4
SC***13Bolt4
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Z26-1-20 Manifold, Exhaust, Dc16
33***77Manifold, Exhaust2
33***78Ring, Sealing8
33***79Screw, Flange16
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Z26-1-1 Manifold, Exhaust, Dc9
33***41Manifold, Turbo Exhaust1
33***42Manifold, Exhaust1
33***43Gasket1
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Z26-1-10 Manifold, Exhaust, Dc12 59a
33***16Manifold, Turbo Exhaust1
33***17Manifold, Exhaust2
33***18Stud, M10 X 502
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Z27-1-10 Cylinder Head, Dc12 59a
33***90Insert, Valve Seat2
33***91Insert, Valve Seat, Intake O/S Stage 2/Tier20
33***92Insert, Valve Seat, Exhaust Std2
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Z27-1-1 Cylinder Head, Dc9
33***85Head, Cylinder1
33***86Head, Cylinder, P/Ex1
33***87Head, Cylinder1
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Z27-1-20 Cylinder Head, Dc16
33***85Head, Cylinder8
33***90Insert, Valve Seat2
33***91Insert, Valve Seat, Intake O/S Stage 2/Tier20
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Z29-1-10 Oil Cooler, Dc12 59a
SC***98Gasket1
SC***18Gasket1
SC***21Bolt, M8x40, Flange Screw10
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Z29-1-20 Oil Cooler, Dc16
33***76Cover, Plate1
SC***33Cooler, Oil1
SC***77Cover1
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Z29-1-1 Oil Cooler, Dc9
33***37Cooler, Oil1
33***38Adapter1
SC***98Gasket1
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Z30-1-1 Dipstick, Assembly, Dc9
33***30Dipstick1
33***31Dipstick1
33***32Pipe1
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Z30-1-20 Oil Level Dipstick, & Tube, Dc16
SC***91Pipe1
SC***47Adapter, Union, Straight1
SC***26Flange Pipe1
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Z30-1-10 Oil Level Dipstick, & Tube, Dc12
SC***24Ferrule1
SC***48Dipstick1
SC***37Clip1
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Z31-1-20 Oil Sump, Dc16
33***59Sump, Oil1
33***60Kit-Gasket1
33***61Screw, Flange26
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Z31-2-1 Pump, Oil, Sump Extraction
33***58Pump, Sump Oil Extraction1
33***59Bracket, Oil Pump Support1
33***60Hose, Oil Extraction Pump1
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Z31-1-1 Oil Sump, Dc9
33***62Plug, Magnetic1
33***23Sump, Oil1
33***24Gasket1
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Z31-1-10 Oil Sump, Dc12
33***93Plate, Cover1
SC***14Washer, Sealing1
SC***22Screw, M8 X 6027
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Z32-2-10 Oil, Pressure, Sensor Dc12 59a
33***13Washer, Sealing2
33***14Flange, Mounting1
SC***89Adapter1
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Z32-1-1 Oil Pump, Dc9
33***34Pump, Oil1
33***35Pipe, Suction1
33***36Tube1
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Z32-1-20 Oil Pump, Dc16
SC***25Screw, M8 X 604
SC***19Screw, M8 X 3019
SC***19O Ring2
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Z32-1-10 Oil Pump, Dc12
SC***43Pipe1
SC***22Screw, M8 X 604
SC***46Pipe1
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Z33-1-1 Flywheel, Assembly, Dc9
Z33-1-10 Flywheel Assembly, Dc12
SC***95Bolt, M16 X 9010
SC***88Flywheel, Assembly1
SC***13Gear, Flywheel Ring1
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Z33-1-20 Flywheel, Assembly, Dc16
33***70Flywheel, Assembly1
SC***13Gear, Flywheel Ring1
SC***73Screw10
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Z34-1-20 Flywheel Housing, Dc16
33***58Housing, Flywheel1
SC***80O Ring1
SC***83Seal, Rear Oil1
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Z34-1-1 Flywheel, Housing, Dc9
33***11Housing, Flywheel1
33***12Housing, Flywheel1
33***13Plate, Timing Gear12
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Z34-1-10 Flywheel Housing, Dc12
33***83Housing, Flywheel1
33***84Insert, Thread6
33***85Cover1
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Z35-1-10 Camshaft, & Timing Gears, Dc12
33***48Bearing2
33***07Camshaft1
SC***94Gear1
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Z35-1-20 Camshaft, & Timing Gears, Dc16
33***48Bearing1
33***71Camshaft1
33***72Camshaft1
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Z35-10-1 Balance Shaft, Assembly, Dc9
33***27Frame, Balance Shaft, Assembly1
33***28Dowel, 6 X 162
33***29Plug, Screw M10 X92
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Z35-1-1 Camshaft, & Timing Gears, Dc9
33***46Camshaft1
33***47Camshaft1
33***48Bearing1
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Z36-1-20 Timing Case & Covers, Dc16
SC***64Spring1
SC***18Gasket2
SC***10Stud, M10 X 502
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Z36-1-10 Timing Case & Covers, Dc12
SC***67Plug1
SC***37Cover1
SC***25Screw, M8 X 602
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Z36-2-1 Casing, Crankshaft, Damper Dc9
33***23Cover, Front Assembly1
SC***43Bolt, M10 X 60mm, Flange Screw8
SC***29Gasket1
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Z36-2-20 Casing, Vibration Insulator, Dc16
SC***60Gasket1
SC***40Cover1
SC***87O Ring1
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Z37-1-10 Piston & Con-Rod, Assemblies, Dc12
33***94Rod, Connecting, Assembly6
33***95Bolt, Con-Rod M14 X 702
33***96Kit-Big End Bearing, Undersize 0.250
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Z37-1-20 Piston & Con-Rod, Assemblies, Dc16
33***69Kit-Big End Bearing1
SC***29Pin, Gudgeon1
SC***59Bush, Small End1
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Z37-1-1 Piston, Assembly, Dc9
33***25Piston, All Speed5
33***26Piston, Single Speed5
SC***29Pin, Gudgeon1
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Z38-1-10 Crankshaft Assembly, Flywheel & Damper Dc12
33***00Damper, Crankshaft1
33***01Driver1
33***02Sleeve, Spacer1
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Z38-1-1 Crankshaft Assembly, Flywheel & Damper Dc9
33***94Rod, Connecting, Assembly5
33***95Bolt, Con-Rod M14 X 702
33***96Kit-Big End Bearing, Undersize 0.255
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Z38-1-20 Crankshaft Assembly, Dc16
SC***16Crankshaft1
SC***89Screw12
SC***04Gear, Crankshaft1
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Z39-1-2 Cylinder Block, Assembly
33***01Guide12
33***02Screw, M18 X 190, To E628566812
33***03Plug, Core 14mm1
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Z39-1-10 Cylinder Block, Assembly, Dc12
33***02Screw, M18 X 190, To E628566814
33***04Bearing, Main Std7
33***05Bearing, Main, U/S = 0.25mm7
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Z39-1-20 Cylinder Block, Assembly, Dc16
33***04Bearing, Main Std5
33***05Bearing, Main, U/S = 0.25mm0
33***06Bearing, Main, U/S = -0.50mm0
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Z39-1-1 Cylinder Block, Assembly
33***98Block, Cylinder, Dc91
33***01Guide12
33***02Screw, M18 X 190, To E628566812
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Z39-2-1 Oil Filler, Cylinder, Block Dc9 & Dc12
33***53Seal1
33***54Hose1
33***55Bracket1
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Z42-1-10 Engine Mounting, Brackets Dc12
33***53Bracket, Engine Mounting2
33***54Screw8
33***06Bracket, Engine Mounting2
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Z42-1-20 Engine Mounting, Brackets Dc16
33***50Screw, Flange8
33***53Bracket, Engine Mounting2
33***54Screw8
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Z42-1-1 Engine Mounting, Brackets Dc9
33***48Bracket, Engine Mounting, Lh1
33***49Bracket, Engine Mounting, Rh1
33***50Screw, Flange4
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Z43-1-10 Air Filter, Dc12
33***21Hose1
33***22Pipe1
33***23Bracket1
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Z43-1-20 Air Filter, Installation, Dc16
32***64Clip, Overcentre5
32***98Cover, Filter End1
32***99O Ring1
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Z43-1-1 Air Filter, Assembly, Dc9
33***21Hose1
33***22Pipe1
33***05Clamp, 160-180mm1
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Z44-1-1 Air Induction Hoses, Dc9
33***21Hose1
33***47Pipe1
SC***32Sensor1
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Z44-1-20 Air Induction Hoses, Dc16
33***89Pipe, Elbow1
SC***32Sensor1
SC***69Hose1
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Jcb : G500qx(Jcb Generator) : Z Jcb Generator Set : Z45 Exhaust System
Z46-1-10 Radiator, Frame & Components, Dc12
33***86Screw, M12 X 1304
33***87Washer, Spring0
33***88Washer0
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Z46-4-20 Fan Guards, Dc16
33***08Bracket1
33***09Washer19
SC***63Washer2
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Z46-4-1 Fan Guards, Finger Dc9
33***82Screw, Flange, M8 X 501
33***09Washer1
33***70Ring, Sealing, 787mm Dia1
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Z46-1-1 Radiator & Fittings, Dc9
33***82Radiator1
33***83Plug1
33***84Bush2
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Z46-4-10 Guard, Finger Dc12
33***29Grille2
33***30Bracket1
33***31Bracket, L/H1
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Z47-3-10 Radiator, Hoses And Pipework, Dc12
33***96Washer2
33***33Hose, Radiator1
33***34Bracket1
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Z47-1-20 Cooler Assembly, Dc16
SC***45Tank, Expansion1
SC***68Cap, Coolant Pressure1
SC***67Sensor1
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Z47-1-1 Radiator, Assembly, Dc9
33***82Radiator1
33***87Washer, Spring10
33***89Nut, M122
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Z47-3-20 Radiator, Hoses And Pipework, Dc16
SC***15Nut, Lock M101
SC***81Clamp1
SC***94Gasket1
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Z47-3-1 Radiator, Hoses And Pipework, Dc9
33***95Hose1
33***96Washer2
33***87Hose, Radiator1
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Z47-1-10 Radiator, Assembly, Dc12
33***84Bush1
33***85Clamp1
33***86Screw, M12 X 1301
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Z48-2-1 Cooler,Air Charge, Dc9
33***76Screw, M8 X 902
33***61Cooler, Charge Air1
33***62Cooler, Charge Air1
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Z48-3-1 Connectors, Charge, Air Cooler Pipes Dc9
33***74Pipe, Charge Air1
33***75Connector, Charge Air Pipe1
33***76Screw, M8 X 902
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Z48-2-10 Cooler,Air Charge, Dc12
33***93Washer, Spring0
33***65Ring, Sealing4
33***06Bracket2
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Z48-2-20 Cooler,Air Charge, Installation Dc16
33***40Bracket1
SC***91Hose3
SC***24Clamp, 'V'1
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Jcb : G500qx(Jcb Generator) : Z Jcb Generator Set : Z49 Charge Air Cooler Hoses
Jcb : G500qx(Jcb Generator) : Z Jcb Generator Set : Z50 Low Pressure Fuel System
Jcb : G500qx(Jcb Generator) : Z Jcb Generator Set : Z51 Fuel Sediment Filters
Jcb : G500qx(Jcb Generator) : Z Jcb Generator Set : Z57 Engine Oil Drain
Jcb : G500qx(Jcb Generator) : Z Jcb Generator Set : Z60 Generator Chassis Components
Jcb : G500qx(Jcb Generator) : Z Jcb Generator Set : Z61 Generator Bodywork
Z62-1-1 Generator Alternator, Uci274i
32***08Regulator, A.V.R Sx4601
32***99Kit-Rectifier, Service1
32***23Regulator, As440; Sa465 See Bulletin1
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Z62-2-1 Generator Alternator, Hc434d
32***22Kit-Rectifier1
32***23Regulator, As440; Sa465 See Bulletin1
33***24Regulator, Voltage, Mx341 Avr1
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Z62-4-1 Generator Alternator, Hc434f
32***22Kit-Rectifier1
32***23Regulator, As440; Sa465 See Bulletin1
33***24Regulator, Voltage, Mx341 Avr1
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Z62-3-1 Generator Alternator, Hc434e
32***22Kit-Rectifier1
32***23Regulator, As440; Sa465 See Bulletin1
33***24Regulator, Voltage, Mx341 Avr1
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Z62-5-1 Generator Alternator, Hc534d
32***22Kit-Rectifier1
32***23Regulator, As440; Sa465 See Bulletin1
33***24Regulator, Voltage, Mx341 Avr1
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Z62-6-1 Generator Alternator, Hc534e
32***22Kit-Rectifier1
32***23Regulator, As440; Sa465 See Bulletin1
33***24Regulator, Voltage, Mx341 Avr1
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Z63-10-1 Kit, Conversion, Can/Usb
33***91Kit, Can/Usb Converter; Kit Consists Of: Cc/Usb Converter; Usb Cable; Db9 Connector;, Telecontrol Software; Configuration Software1
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Z66-1-10 Battery, Cables, & Isolation Kit
33***30Kit, Battery Isolator, 11091
33***47Battery, Cables, Scania Dc121
70***67Battery, Gel Type1
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Z66-1-1 Battery Cables, Isolator & Bridge
33***30Kit, Battery Isolator, 11091
33***41Bridge, Battery, With Isolator Kit1
33***48Battery, Cables, Scania Dc91
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Z66-1-20 Battery, Cables, & Isolation Kit
33***30Kit, Battery Isolator, 11091
33***32Battery, Cables, Scania 500kva1
70***67Battery, Gel Type1
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Frequently asked questions

What engine does the G500QX use?

The G500QX uses a Scania DC13-072A six-cylinder diesel engine with an electrical governor.

What is the operating weight?

The operating weight is 4,627 kg.

What replaced the G500QX?

The G500QX is part of the QX series, which has been succeeded by the G60QI and other newer generations in specific markets, though the QX range remains in production for many regions.

What G500QX(JCB GENERATOR) owners discuss

What engine powers the JCB G500QX generator, and what are its key specifications?
The JCB G500QX is powered by a Scania DC13-072A engine. It is a 6-cylinder unit with an electrical governor. The engine is available in Stage IIIA emissions compliant configurations. The generator delivers a standby rating of 500 kVA (400 kW) and a prime rating of 461 kVA (369 kW). The alternator is a MeccAlte HM335A2, providing 728 Amps per phase at 0.8 power factor. The unit weighs 4,627 kg in standby configuration and 2,917 kg dry (with all fluids except fuel). Dimensions are 4,500 mm in length, 1,800 mm in width, and 2,340 mm in height for the standby spec, or 3,600 mm length, 1,460 mm width, and 2,096 mm height for the standard QX range configuration. It includes a 740-liter bunded integrated fuel tank.
What are the common electrical or sensor issues reported for JCB power systems?
Common electrical issues in JCB machinery often involve the forward/reverse shuttle system. The shuttle lever operates microswitches that activate hydraulic solenoids on the transmission body. A frequent failure point is the forward microswitch or inhibitor switch, which can cause the machine to rev without moving forward while reverse functions normally. Operators should verify solenoid engagement by checking for magnetic attraction with a screwdriver blade. Other common electrical faults include AMF (Automatic Mains Failure) high-side driver faults, open circuits, or short circuits to the battery. Sensor issues often involve water-in-fuel sensor feedback signal ADC faults and MAF (Mass Air Flow) sensor low or high voltage faults, which can trigger torque reduction.
What are the typical undercarriage or wear patterns for JCB construction equipment?
While specific wear data for the G500QX generator undercarriage is not applicable as it is a stationary power unit, JCB construction equipment (such as the 3CX and 520 series) exhibits common wear patterns in the shuttle box and transmission. Operators report that the shuttle box fluid level drops over time, requiring frequent topping up to maintain forward and reverse engagement. Metal filings in the torque converter filter indicate internal wear. Undercarriage wear in tracked JCB machines is influenced by ground pressure and duty cycle; heavy mining and mass excavation applications accelerate track and shoe wear. Regular inspection of the shuttle box fluid and filter is critical for transmission longevity.
What are the known engine quirks for JCB 444 series engines?
JCB 444 engines rely on glow plugs for cold starting. A common quirk is hard starting in cold weather, which may be caused by failed glow plugs or a faulty glow plug relay/timer preventing the plugs from heating. Unusual noises, such as a deep, rhythmic knocking that increases under load, should be investigated immediately as they may indicate serious internal damage. Low power output is another common concern, often linked to fuel system faults or injector drift. The engines are available in various generations, from early Tier 2 Dieselmax to T4 Final EcoMax, and starting problems are the most frequent reason owners seek assistance.
What maintenance features are standard on the JCB G500QX generator?
The JCB G500QX includes a three-stage fuel filtration system to protect the engine from poor fuel quality and a high-capacity water/debris capture system. An optional self-cleaning air filtration system is available. The unit features a sound-attenuated canopy with 50mm rock wool sound insulation for low noise operation. It includes a weatherproof enclosure, a battery charger, an engine block heater, and a 800Amp MCB. The control panel is a JCB CP1 Auto Type with LiveLink standard for 36 months of data time, providing real-time performance tracking, fuel-theft alerts, and service reminders. The alternator uses a Mecc Alte MAUX excitation system, eliminating the need for a PMG system.
What should be checked when buying a used JCB G500QX generator?
When inspecting a used JCB G500QX, verify the engine serial number and emissions tier (Stage IIIA or later) to ensure compatibility with local regulations. Check the condition of the Scania DC13-072A engine for unusual noises, particularly rhythmic knocking under load. Inspect the MeccAlte HM335A2 alternator for signs of wear or overheating. Test the JCB CP1 control panel and LiveLink system for proper functionality and data history. Verify the integrity of the 740-liter bunded fuel tank for leaks. Check the three-stage fuel filters and air filtration system for clogging or damage. Ensure the sound attenuated canopy and bump protection blocks are intact. Verify the operation of the engine block heater and battery charger. Check for any error codes related to the AMF system or sensors.
What safety-critical fixes or verifications are recommended for JCB power systems?
For JCB G500QX generators, ensure the emergency stop button is functional and accessible. Verify the integrity of the CE pack and grounding connections. Have your dealer verify the calibration of the Scania engine governor and the alternator voltage regulation. For JCB construction equipment, have your dealer verify the adjustment of the forward/reverse shuttle microswitches and solenoids to prevent unintended movement. Always consult official OEM service manuals for precise operating specs and safety protocols before performing maintenance or repairs.

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

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