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Jcb G65QX(JCB GENERATOR)
Maintenance schedule, common problems & OEM parts breakdown
The JCB G65QX is a 47 kW prime power / 50.4 kW standby diesel generator set in the compact G65 series, offered in open (G65X) and weatherproof canopy (G65QX) configurations. It is powered by a JCB Dieselmax 444 4-cylinder turbocharged diesel engine rated at 62 kW (83 hp) at 1500 rpm, paired with a JCB HM 200B2 synchronous alternator. Operating weights range from 1100 kg for the open frame to 1902 kg for the canopy version, with dimensions of 2750 x 1100 x 1760 mm. The G65 series was produced from approximately 2008 through 2026, serving as a compact prime power solution for construction sites and industrial backup, preceding the transition to the QS series (G65QS) and RS series for modern rental markets.
Across the G65 lineage, primary evolution involved emissions compliance updates, with later models meeting Stage IIIa standards, and integration of the CP1 digital control panel for enhanced monitoring. The G65QX remains significant in the used and parts market due to its robust Dieselmax engine architecture, which offers extended 500-hour oil intervals compared to competitors, and widespread deployment in rental fleets. The canopy configuration provides IP54 protection and integrated 250-liter fuel tanks, making it a durable choice for harsh environments where reliability and low maintenance frequency are critical.
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 G65QX(JCB GENERATOR) specifications
Engine
| Model | JCB Dieselmax 444 (also listed as DieselMaxx GTC-1 S2) |
| Configuration | 4-cylinder in-line, turbocharged, liquid-cooled |
| Displacement | 4.399 L |
| Rated Speed | 1500 rpm |
| Emissions Tier | Tier IIIa (available) |
Weights
| Operating Weight (Canopy/QX) | 1902 kg (4193 lb) |
| Operating Weight (QS/Enclosed) | 1590 kg (3505 lb) |
| Operating Weight (Open/Standby Spec) | 1930 kg (4255 lb) |
| Dry Mass (Open/Canopy variants) | 1100 kg / 1600 kg (2425 lb / 3527 lb) |
Dimensions
| Transport Length (Canopy/QX) | 2750 mm (9.02 ft) |
| Transport Width (Canopy/QX) | 1100 mm (3.61 ft) |
| Transport Height (Canopy/QX) | 1760 mm (5.77 ft) |
| Transport Length (QS/Enclosed) | 2750 mm (9.02 ft) |
| Transport Width (QS/Enclosed) | 1140 mm (3.74 ft) |
| Transport Height (QS/Enclosed) | 1830 mm (6.00 ft) |
| Transport Length (Open/Standby Spec) | 2850 mm (9.35 ft) |
| Transport Width (Open/Standby Spec) | 1140 mm (3.74 ft) |
| Transport Height (Open/Standby Spec) | 1850 mm (6.07 ft) |
Performance
| Prime Power (kVA/kW) | 58.7 kVA / 47 kW |
| Standby Power (kVA/kW) | 63 kVA / 50.4 kW |
| Fuel Consumption (Nominal/Prime) | 8.2 L/h |
| Fuel Consumption (100% Load) | 14.1 L/h |
| Fuel Consumption (75% Load) | 10.6 L/h |
| Noise Level (Residential Silencer) | 65 dB(A) at 7 m |
| Noise Level (Industrial Silencer) | 94 dB(A) at 7 m |
Service capacities (summary)
| Fuel Tank Capacity | 250 L (bundled/integrated) |
| Fuel Tank Capacity (Standby Spec) | 285 L (bundled integrated) |
| Fuel Tank Capacity (Open/Prime Spec) | 270 L |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Jcb G65QX(JCB GENERATOR) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the G65QX(JCB GENERATOR) beyond the schedule
Predictive Maintenance & Fluid Analysis
At the 500-hour interval, take oil samples from the engine, hydraulic tank, and axle systems to establish a baseline for wear metals and contamination. Inspect the hydraulic return filter magnet for metallic debris before disposal. Monitor the engine oil level daily via the dipstick and check the coolant expansion tank for proper level. Use JCB Engine Oil Special or equivalent 15W-40 diesel oil meeting API specifications. Regular fluid analysis prevents catastrophic engine and hydraulic failures by detecting issues 500 to 800 hours before they manifest as physical symptoms.
Corrective & Common Repairs
Common repairs for the G65QX involve replacing the primary and secondary fuel filters to protect the Dieselmax 444 common-rail injectors from contamination. Inspect the turbocharger boots and wastegate function for leaks or restriction. Check the alternator and starter load to identify failing electrical components before they strand the unit. Replace drive belts if tension is insufficient or wear is visible. Address any cylinder rod scoring or hose chafing identified during daily walkarounds to prevent fluid loss and safety hazards.
Overhaul & Rebuild Points
The 2000-hour service is the critical overhaul point, requiring a full hydraulic oil change and tank cleaning. Measure swing ring play using dial indicators to assess bearing wear. Inspect structural components like the boom, arm, and chassis for cracks or unauthorized welding. Check brake disc wear and immersed brake condition. Use the JCB ServiceMaster tool to check injector spray patterns and replace injectors as required. This interval determines whether the machine can continue reliable service or requires major component replacement.
Seasonal & Environment Servicing
In cold environments, utilize the engine block heater to ensure reliable starts and reduce wear. Inspect the weatherproof enclosure seals on the G65QX canopy to maintain IP54 protection against moisture and dust. Check the battery charger and electrolyte levels if using non-sealed batteries. Service the cab HVAC system, including the cabin filter, to ensure operator comfort. In dusty conditions, monitor the air filter restriction indicator closely and replace or clean the element as needed to prevent engine damage.
G65QX(JCB GENERATOR) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 32/925705 | Element, Fuel Sediment/Water, 150 Microns | Fuel system service | Check fitment → |
| 32/925694 | Element, Fuel Filter | Fuel system service | Check fitment → |
| 32/925717 | Filter, Fuel Sediment, 30 Micron | Fuel system service | Check fitment → |
| 320/20166 | G.A, Fuel Filter & Lp Pipes Na & Tc, Genset | Fuel system service | Check fitment → |
| 320/04114 | Retainer, Fuel Filter | Fuel system service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
G65QX(JCB GENERATOR) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| P0087 | Fuel Rail/System Pressure Too Low | Clogged fuel filters, failing lift pump, or restricted fuel line. | Check fuel filter condition and fuel pressure at the rail. |
| P0117 | Engine Coolant Temperature Sensor Circuit Low Voltage | Faulty coolant temperature sensor, open circuit in wiring, or poor ground connection. | Inspect sensor wiring harness and connector for damage; test sensor resistance. |
| P0521 | Engine Oil Pressure Sensor Range/Performance Issue | Faulty oil pressure sensor, low oil level, or sensor circuit malfunction. | Verify actual oil pressure with a mechanical gauge; check sensor wiring. |
| P2047 | Reductant Injector Circuit Open (SCR System Fault) | Open circuit in the DEF/AdBlue injector wiring or faulty injector solenoid. | Inspect injector connector and wiring harness for damage or corrosion. |
| U0100 | Lost Communication with Engine Control Module (ECM) | Damaged CAN bus wiring, poor ground, or low system voltage. | Check battery voltage and terminal tightness; inspect CAN bus connectors. |
| P0335 | Crankshaft Position Sensor 'A' Circuit No Signal | Failed crank sensor, damaged wiring, or debris on sensor tip. | Inspect sensor for physical damage and check wiring continuity. |
| P0336 | Crankshaft Position Sensor 'A' Circuit Signal Fault | Intermittent signal from crank sensor or timing issue. | Check sensor air gap and wiring integrity; verify engine timing. |
| P0102 | Mass Air Flow (MAF) Sensor Low Voltage Fault | Dirty or faulty MAF sensor, intake air leak, or wiring issue. | Clean MAF sensor; inspect intake ducting for leaks. |
| P0101 | Mass Air Flow (MAF) Sensor Circuit Range/Performance | MAF sensor out of calibration or restricted airflow. | Check air filter condition and MAF sensor operation. |
| P029B | Injector Drift Fault Detection on Injector 2 | Fuel injector 2 mechanical drift or electrical fault. | Test injector 2 resistance and operation; check fuel quality. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
G65QX(JCB GENERATOR) attachments & work tools
Generator Enclosure Types
The G65QX is offered in open and canopy configurations, as documented in the JCB Power Products generator range catalog.
Power Output Specifications
Prime power is rated at 64.6 kVA (51.7 kW) and standby power at 80 kVA (64 kW) for the G65QS variant, with total fuel capacity at 270 L.
Physical Dimensions and Weight
The machine measures 2,850 mm in length, 1,140 mm in width, and 1,850 mm in height, with a total weight of 1,930 kg.
Engine and Alternator
The compact generator range utilizes JCB 4 Cylinder DIESELMAX or JCB 6 Cylinder DIESELMAX engines, paired with high efficiency alternators.
Control and Telemetry
Standard equipment includes a Deep Sea Electronics control panel, AMF capabilities, and JCB LiveLink telematics for fleet monitoring.
Fuel and Lubrication Systems
The unit features a bunded base fuel tank, 3 stage fuel filtration, and an optional sump oil pump for maintenance access.
Noise and Emissions
Noise levels are rated at 68 dB(A), and the unit is designed for inner city applications with low greenhouse gas emissions.
Service and Access Features
Design includes lockable maintenance access doors, a control panel viewing window, and a central lifting point for safe positioning.
Electrical Connections
A socket box is included with 1 x 32A 3ph and 3x32A 1ph outlets, alongside EMC certification for compliance.
Serial Number Applicability
The G65QX is covered under serial range the OEM part reference-the OEM part reference for the the OEM part reference and the OEM part reference engine/build codes.
All G65QX(JCB GENERATOR) assemblies by section
Every catalogued assembly group for the Jcb G65QX(JCB GENERATOR). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Z Electrical Power Generation, Unit
Z1-1-1 Engine 320/40255, Complete, Tca Turbo 100kw
| 32***55 | Engine, Complete 100kw 12v, Euro 2 11.5"F/W | 1 |
Z1-2-1 Engine 320/40106, Complete, Nat/Aspirated 74kw
| 32***06 | Engine, Assembly 74kw 12v, Tc, Euro 2 11.5" F/W | 1 |
Z2-1-1 Service Tools
| 32***20 | Bracket, Engine Lifting | 1 |
| 89***46 | Tool, Fitting, Core Plug | 1 |
| 89***47 | Tool, Crankshaft Turning | 1 |
Z2-2-1 Sealant Templates
| 89***49 | Template, Oil Pan Sealant | 1 |
| 89***75 | Template, Sealant, Bedplate To Block | 1 |
| 89***77 | Template, Sealant, Flywheel, Housing To Gearcase | 1 |
Z3-1-1 Lubricants Primers, & Sealants
| 32***28 | Sealant, 620 | 0 |
| 32***29 | Lubricant, O Ring, P80 | 0 |
| 32***30 | Sealant, 5900 | 0 |
Z4-2-1 Gasket Set, Top Overhaul
| 32***08 | Gasket, Cylinder Head | 1 |
| 32***33 | Seal, Valve Stem | 16 |
| 32***40 | O Ring | 1 |
Z4-3-1 Gasket Set, Bottom Overhaul
| 32***31 | Sealant, 518 | 1 |
| 32***29 | Seal, Rear Oil | 1 |
| 32***19 | Seal, Front Oil | 1 |
Z4-1-1 Seal Kit, Rocker Cover
| 32***92 | O Ring, Oil Filler Cap | 1 |
| 32***87 | Cap, Fuel Injector | 4 |
| 32***88 | Cap, Fuel Pipe | 8 |
Z4-5-1 Gasket Set, Top Overhaul, Tc
| 32***08 | Gasket, Cylinder Head | 1 |
| 32***33 | Seal, Valve Stem | 16 |
| 32***40 | O Ring | 2 |
Z4-4-1 Seal Kit, Oil Pan
| 32***30 | Sealant, 5900 | 1 |
| 32***50 | O Ring | 2 |
| 32***62 | Seal, Oil-Pick-Up | 1 |
Z5-4-1 Engine, Long, Tc 320/40081
| 32***32 | Gear, Crankshaft, Assembly | 1 |
| 32***43 | Kit-Gasket, Long Engine, Tc/Tca | 1 |
| 32***03 | Piston, & Con-Rod, Assembly | 1 |
Z5-2-1 Engine, Short, Tc 320/40060
| 32***29 | Seal, Rear Oil | 1 |
| 32***19 | Seal, Front Oil | 1 |
| 32***17 | Kit-Top Gasket, Turbo Engine | 1 |
Z5-6-2 Kit-Engine Overhaul, Oversize - 0.50mm, Tc
| 32***40 | Bolt, Con-Rod, M8 X 57 | 8 |
| 32***38 | Kit-Piston, Oversize - 0.50mm, Turbocharged | 4 |
| 32***80 | Kit-Top Gasket, Turbo Engine | 1 |
Z5-6-3 Kit-Engine Overhaul, Oversize - 1.00mm, Tc
| 32***40 | Bolt, Con-Rod, M8 X 57 | 8 |
| 32***39 | Kit-Piston, Oversize - 1.0mm, Turbocharged | 4 |
| 32***80 | Kit-Top Gasket, Turbo Engine | 1 |
Z5-6-1 Kit-Engine Overhaul, Standard, Tc
| 32***40 | Bolt, Con-Rod, M8 X 57 | 8 |
| 32***11 | Kit-Piston, Standard, Turbo | 4 |
| 32***80 | Kit-Top Gasket, Turbo Engine | 1 |
Z6-2-1 Oil Filter
| 32***33 | Filter, Engine Oil | 1 |
| 32***23 | G.A, Oil Cooler 60kw, Inc Filter/Filler | 1 |
| 32***24 | Cooler, Oil, Inc Filter/Filler | 1 |
Z6-4-1 Primary Fuel Filter, Element, Cold Climate
| 32***05 | Element, Fuel Sediment/Water, 150 Microns | 1 |
| 32***33 | Seal, O'Ring | 1 |
Z6-3-1 Primary Fuel Filter
| 13***7Z | Screw, M8 X 25 | 2 |
| 13***7Z | Screw, M12 X 25 | 2 |
| 32***94 | Element, Fuel Filter | 1 |
Z6-1-1 Fuel Filter
| 13***5Z | Bolt, Flange Head, M8 X 20 Lg | 1 |
| 21***07 | Pin, Tension | 1 |
| 32***14 | Retainer, Fuel Filter | 1 |
Z8-12-3 Front End Drive, Accessory, With Cooling Fan
| 32***00 | Hub, Fan Drive, Assembly | 1 |
| 32***03 | Pulley, Cooling Fan 1.25:1, D=133mm | 1 |
| 32***30 | Pulley, Idler, Long | 1 |
Z8-12-4 Front End Drive, Accessories, With Cooling Fan
| 32***03 | Pulley, Cooling Fan 1.25:1, D=133mm | 1 |
| 32***41 | Screw, Pan Head, M8 X 20 | 4 |
| 32***50 | Hub, Fan Drive, Assembly 1.375 Ratio | 1 |
Z8-8-1 Front End Drive, Accessory, 79mm Diameter Idler Pulley
| 32***00 | Hub, Fan Drive, Assembly | 1 |
| 32***41 | Screw, Pan Head, M8 X 20 | 1 |
| 32***72 | Pulley, Fan, D=166, Ratio 1:1 | 1 |
Z8-2-1 Autotensioner, Drive Belt
| 13***8Z | Screw, Star Drive, M8 X 30 | 3 |
| 32***84 | Adjuster, Auto-Tension | 1 |
| 32***46 | Adjuster, Autotensioner | 1 |
Z8-1-1 Crankshaft Pulley
| 32***69 | Bolt, Torx Head Flange, M12 X 65 X 12.9 | 3 |
| 32***43 | Pulley, Crankshaft | 1 |
| 32***01 | Crankshaft, Assembly | 1 |
Z8-3-2 Lower Idler Pulley
| 13***5Z | Bolt, Flange Head, M8 X 65 | 3 |
| 22***62 | Circlip, Internal | 1 |
| 32***22 | Pulley, Idler, D=124mm | 1 |
Z8-3-1 Lower Idler Pulley, 79mm Diameter
| 13***9Z | Bolt, M8 X 35, Flange Reduced Hex | 2 |
| 13***1Z | Bolt, M8 X 45, Flange Reduced Hex | 1 |
| 32***86 | Pulley, Lower Idler, Assembly | 1 |
Z9-1-1 Starter Motor, 12.Volt
| 13***8Z | Screw, Star Drive, M10 X 30 | 3 |
| 32***32 | Motor, Starter 12v, With Earth Stud | 1 |
| 32***52 | Motor, Starter | 1 |
Z10-1-1 Alternator, 12volt - 95amp
| 13***8Z | Screw, Star Drive, M10 X 30 | 1 |
| 13***2Z | Bolt, Star Drive, M10 X 120 | 1 |
| 32***60 | Alternator, 12v-95amp | 1 |
Z11-1-1 Switches & Senders, 12volt
| 17***02 | Seal, Ring | 1 |
| 32***46 | Switch, Oil Pressure | 1 |
| 32***57 | Seal, Bonded | 1 |
Z12-3-1 Fuel Pipework, Primary Filter
| 32***41 | Pipe, Fuel Filter To Pump | 1 |
| 32***42 | Clip, Pipe, 8/9mm Dia | 1 |
| 32***43 | Clip, Pipe, 9.5/10mm Dia | 1 |
Z12-2-1 Fuel Pipework, Low Pressure
| 32***39 | Bolt, Banjo M12 | 2 |
| 32***33 | Ring, Snap | 1 |
| 32***34 | O Ring | 4 |
Z12-1-1 Fuel Pipework, High Pressure
| 32***11 | Clip, F.I.P 2 Way | 4 |
| 32***59 | Pipe, Fuel, Injector 1 & 2, Assembly | 1 |
| 32***60 | Pipe, Fuel Injector 3 & 4, Assembly | 1 |
Z12-2-10 Fuel Pipes, Low Pressure, Tca
| 32***39 | Bolt, Banjo M12 | 2 |
| 32***33 | Ring, Snap | 1 |
| 32***34 | O Ring | 4 |
Z13-2-1 Fuel Injector, Tc
| 32***93 | Bolt, Injector Clamp | 4 |
| 32***39 | Clamp, Fuel Injector | 4 |
| 32***24 | Seal, Injector | 1 |
Z13-1-1 Fuel Injector, Tca
| 32***93 | Bolt, Injector Clamp | 4 |
| 32***39 | Clamp, Fuel Injector | 4 |
| 32***24 | Seal, Injector | 1 |
Z14-1-1 Fuel Lift Pump
| 13***7Z | Screw, Star Drive, M8 X 25 | 3 |
| 32***40 | Pump, Fuel Lift | 1 |
| 32***51 | O Ring | 1 |
Z15-1-1 Fuel Injection Pump, 12v - 110kw
| 32***19 | Seal, Injection Pump To Timing Case | 1 |
| 32***64 | Nut, M8 Flange Head | 3 |
| 32***77 | Nut, M14, Fuel Injection Pump Gear | 1 |
Z15-2-1 Fuel Injection Pump, 12v - 74kw
| 32***19 | Seal, Injection Pump To Timing Case | 1 |
| 32***64 | Nut, M8 Flange Head | 3 |
| 32***77 | Nut, M14, Fuel Injection Pump Gear | 1 |
Z15-50-1 Injection Pump, Service Parts
| 32***74 | Kit-Regulator | 1 |
| 32***75 | Kit-Timing Window | 1 |
| 32***76 | Kit-Plug | 1 |
Z16-1-1 Water Pump
| 32***10 | Gasket, Water Pump | 1 |
| 32***14 | Screw, Pan Head, M8 X 25 | 4 |
| 32***42 | Pump, Water, Assembly | 1 |
Z17-1-1 Water Inlet, Connector
| 13***7Z | Screw, Star Drive, M8 X 25 | 4 |
| 32***01 | Gasket, Water Inlet Pipe | 1 |
| 32***47 | Connector, Water Inlet, Assembly | 1 |
Z18-1-1 Thermostat & Housing
| 13***5Z | Screw, Star Drive, M8 X 20 | 3 |
| 32***40 | Housing, Thermostat | 1 |
| 32***43 | Seal, C | 1 |
Z19-1-1 Rocker Cover
| 32***90 | Cap, Oil Filler, Assembly | 1 |
| 32***92 | O Ring, Oil Filler Cap | 1 |
| 32***73 | Spring, Ccv Valve | 1 |
Z19-11-1 Cover, Injector Seal
| 32***16 | Cover, Injector Seal | 1 |
| 32***17 | Insert, Injector Seal Cover | 4 |
| 32***21 | G.A, Cover.Injector Seal | 1 |
Z20-3-1 Rocker Shaft, Assembly
| 13***2Z | Bolt, M8 X 50 | 7 |
| 13***5Z | Bolt, Flange Head, M8 X 65 | 1 |
| 32***23 | Washer, Spring | 4 |
Z21-2-1 Valve Tappets & Push, -Rods
| 32***24 | Tappet, Valve | 8 |
| 32***77 | Rod, Push | 8 |
| 32***05 | Camshaft, Assembly | 1 |
Z22-1-1 Turbocharger, Tc
| 32***07 | Stud, M8 X 75 | 4 |
| 32***08 | Nut, Lock, M8 Special | 4 |
| 32***53 | Gasket, Single, Tc To Manifold | 1 |
Z22-2-1 Turbocharger, Tca
| 32***07 | Stud, M8 X 75 | 4 |
| 32***08 | Nut, Lock, M8 Special | 4 |
| 32***53 | Gasket, Single, Tc To Manifold | 1 |
Z23-1-1 Turbo Pipework
| 13***3Z | Screw, M6x16 | 2 |
| 13***5Z | Screw, Star Drive, M8 X 20 | 2 |
| 32***51 | O Ring | 2 |
Z23-1-10 Turbo Pipework
| 13***3Z | Bolt, M6 X 16, Flange Reduced Hex | 2 |
| 13***5Z | Screw, Star Drive, M8 X 20 | 2 |
| 32***51 | O Ring | 2 |
Z23-2-1 Turbo Crossover Tube
| 32***14 | G.A, Turbo Crossover Tube, Garrett Htt | 1 |
| 32***33 | Tube, Turbo Crossover | 1 |
| 32***36 | Hose, 49.5mm X 55mm | 2 |
Z25-4-1 Induction Manifold, Tca
| 13***7Z | Screw, Star Drive, M8 X 25 | 10 |
| 32***11 | Plate, Blanking, Intake Heater | 1 |
| 32***12 | Gasket, Intake Heater | 1 |
Z26-2-1 Exhaust Manifold, Tc
| 32***00 | Manifold, Exhaust | 1 |
| 32***35 | Gasket, Heatshield | 1 |
| 32***45 | Bolt, M10 X 57 | 8 |
Z27-3-1 Cylinder Head, Assembly
| 14***15 | Washer, Seal; Replaces Khj0891 | 1 |
| 32***03 | Plug, Core, D=40mm | 2 |
| 32***28 | Sealant, 620 | 0 |
Z28-1-1 Brackets, Engine Lifting
| 13***8Z | Screw, Star Drive, M10 X 30 | 4 |
| 32***20 | Bracket, Engine Lifting | 2 |
| 32***39 | Label, Front Lifting Eye | 1 |
Z29-4-1 Oil Cooler
| 13***5Z | Bolt, Flange Head, M8 X 20 Lg | 5 |
| 13***7Z | Bolt, M8 X 25, Flange Reduced Hex | 11 |
| 21***07 | Pin, Tension | 1 |
Z30-1-1 Oil Level Dipstick, & Tube, Short
| 13***5Z | Bolt, Flange Head, M8 X 20 Lg | 1 |
| 32***27 | O Ring | 2 |
| 32***29 | O Ring | 1 |
Z31-2-1 Pump, Oil, Sump Extraction
| 33***58 | Pump, Sump Oil Extraction | 1 |
| 33***59 | Bracket, Oil Pump Support | 1 |
| 33***60 | Hose, Oil Extraction Pump | 1 |
Z31-1-1 Oil Sump
| 13***3Z | Screw, Star Drive, M8 X 16 | 2 |
| 32***13 | Plug, Oil Drain | 2 |
| 32***50 | O Ring | 2 |
Z32-1-1 Oil Pump
| 13***2Z | Screw, Star Drive, M8 X 50 | 4 |
| 32***31 | Pump, Engine Oil | 1 |
| 32***20 | Pump, Oil | 1 |
Z33-1-1 Flywheel Assembly, 11.5"Sae J620
| 32***42 | Bolt, M14 X 108mm | 8 |
| 32***72 | Flywheel, Assembly | 1 |
| 32***75 | Hub, Flywheel | 1 |
Z34-1-1 Flywheel Housing, Fh1
| 13***3Z | Screw, Star Drive, M8 X 16 | 2 |
| 13***7Z | Screw, Star Drive, M8 X 25 | 4 |
| 13***2Z | Screw, Star Drive, M8 X 50 | 8 |
Z35-2-1 Camshaft, & Idler Gear, Tc
| 32***30 | Camshaft, Assembly, Tc/Tca | 1 |
| 32***36 | Plug, Idler Gear Blanking, M8 X 18 | 3 |
| 32***06 | Camshaft, Assembly | 1 |
Z36-1-1 Timing Case & Covers, Idler Blanking
| 13***7Z | Screw, Star Drive, M10 X 25 | 2 |
| 13***9Z | Screw, Star Drive, M12 X 35 | 2 |
| 32***25 | Sealant, Loctite 5182 | 0 |
Z37-2-1 Piston & Con-Rod, Assemblies, Tca
| 32***17 | Bush, Small End | 1 |
| 32***40 | Bolt, Con-Rod, M8 X 57 | 2 |
| 32***50 | Circlip | 2 |
Z37-2-1 Piston & Con-Rod, Assemblies, Tc
| 32***17 | Bush, Small End | 1 |
| 32***40 | Bolt, Con-Rod, M8 X 57 | 2 |
| 32***50 | Circlip | 2 |
Z38-5-1 Crankshaft Assembly, 11.5" Flywheel
| 13***1Z | Screw, Star Drive, M10 X 45 | 1 |
| 21***05 | Dowel, Pin | 2 |
| 32***75 | Hub, Flywheel | 1 |
Z39-3-1 Cylinder Block, Assembly, Tca
| 13***5Z | Screw, Star Drive, M8 X 20 | 2 |
| 13***8Z | Bolt, Star Drive, M8 X 80 | 16 |
| 32***01 | Plug, Core, D=25mm | 1 |
Z39-2-1 Cylinder Block, Assembly, Tc
| 13***8Z | Bolt, Star Drive, M8 X 80 | 16 |
| 32***01 | Plug, Core, D=25mm | 1 |
| 32***02 | Plug, Core, D=36mm | 2 |
Z42-1-1 Mountings, Engine & Power Unit
| 13***7Z | Bolt, M12 X 25mm, Reduce Flange Hex | 8 |
| 13***8Z | Bolt, Flange Head, M12 X 30 | 8 |
| 13***0Z | Bolt, Flange Head, M16 X 35 | 2 |
Z43-1-1 Air Filter, Installation
| 13***9Z | Setscrew, M8x35 | 2 |
| 13***7Z | Screw, M10 X 25 | 3 |
| 16***77 | Cap, Rain | 1 |
Z43-2-1 Air Filter, Installation
| 13***8Z | Bolt, M8 X 30, Flange Reduced Hex | 2 |
| 13***7Z | Bolt, M10 X 25, Flange Reduced Hex | 3 |
| 13***3Z | Nut, Self Lock, M8 | 2 |
Z44-1-1 Air Induction Hoses, Turbo
| 16***74 | Adapter, Vacuum Sensor | 1 |
| 22***13 | Clip, Jubilee; Replaces Khj0336 | 1 |
| 22***16 | Clip, Jubilee | 1 |
Z44-2-1 Air Induction Hoses, Turbo
| 16***74 | Adapter, Vacuum Sensor | 1 |
| 22***13 | Clip, Jubilee; Replaces Khj0336 | 1 |
| 22***15 | Clip, Jubilee | 1 |
Z46-2-1 Fittings & Mountings, Coolers
| 13***9Z | Bolt | 2 |
| 13***2Z | Bolt, M8 X 50 | 1 |
| 13***7Z | Bolt, M10 X 25, Flange Reduced Hex | 4 |
Z46-11-1 Fan Guards
| 13***3Z | Bolt, M6 X 16, Flange Reduced Hex | 6 |
| 32***17 | G.A., Cooling Pack - Na, Canopy | 0 |
| 32***49 | G.A, Cooling Pack - G-Drive | 0 |
Z46-1-1 Radiator & Fittings, Mountings
| 13***3Z | Bolt, M6 X 16, Flange Reduced Hex | 17 |
| 13***2Z | Bolt, M8 X 50 | 1 |
| 13***8Z | Bolt, M10 X 30, Flange Reduced Hex | 4 |
Z47-1-1 Radiator Assembly
| 32***17 | G.A., Cooling Pack - Na, Canopy | 1 |
| 33***38 | Radiator | 1 |
Z47-1-10 Cooling Pack, Assembly
| 16***80 | Cap, 1 Bar Pressure | 1 |
| 22***12 | Clip, Jubilee | 12 |
| 32***32 | Guard, Fan, Assembly, Tca | 1 |
Z47-2-1 Fan Guards
| 13***7Z | Screw, M6 X 25mm Long | 25 |
| 32***28 | Guard, Fan, Right Hand | 1 |
| 32***29 | Guard, Fan, Idler Pulley | 1 |
Z48-1-1 Radiator, Hose & Pipework
| 22***01 | Clip, Jubilee | 3 |
| 22***12 | Clip, Jubilee | 4 |
| 32***14 | Tank, Coolant Recovery | 1 |
Z48-11-1 Radiator, Coolant Drain
| 22***05 | Clip, Jubilee | 2 |
| 32***32 | G.A, Coolant Drain | 1 |
| 33***18 | Adaptor, Bulkhead | 1 |
Z49-1-1 Cooling Fan & Spacer
| 13***5Z | Bolt, Flange Head, M8 X 65 | 4 |
| 32***94 | Fan, 22" Pusher | 1 |
| 32***19 | G.A., Engine Fan, Canopy | 1 |
Z49-1-10 Cooling Fan, &, Spacer Tca
| 13***5Z | Bolt, Flange Head, M8 X 65 | 4 |
| 14***7D | Washer, M8 Plain | 4 |
| 32***39 | Fan, Cooling, 24" Pusher | 1 |
Z50-11-1 3-Way Ball Valve
| 13***1Z | Screw | 4 |
| 13***3Z | Nut | 4 |
| 14***15 | Washer, Seal; Replaces Khj0891 | 4 |
Z50-15-1 Primary Fuel Filter, Installation
| 13***7Z | Screw, M8 X 25 | 2 |
| 13***7Z | Screw, M12 X 25 | 2 |
| 32***17 | Filter, Fuel Sediment, 30 Micron | 1 |
Z51-1-1 Primary Fuel Filter
| 32***02 | Ring, Retaining | 1 |
| 32***03 | Seal, Dust | 1 |
| 32***94 | Element, Fuel Filter | 1 |
Z58-2-1 Ccv Filter Outlet, Tca
| 32***53 | Clip | 1 |
| 32***19 | G.A, Ccv Breather Tca | 0 |
| 32***43 | G.A, Ccv Breather Tca | 0 |
Z58-1-1 Ccv Filter Outlet
| 13***3Z | Bolt, M6 X 16, Flange Reduced Hex | 1 |
| 32***19 | G.A., Breather | 1 |
| 33***20 | Hose, Ccv | 1 |
Z60-1-1 Chassis, Canopy Builds, D2
| 33***14 | Frame, Canopy Support, Lower | 1 |
| 33***29 | Clamp | 3 |
| 33***30 | Pipe, End Silencer | 1 |
Z61-1-1 Canopy, Assembly, Rental
| 33***51 | Cover | 2 |
| 33***53 | Dowel, Location | 2 |
| 33***56 | Hinge | 2 |
Z61-2-1 Canopy, Assembly, Standard Range
| 33***51 | Cover | 2 |
| 33***53 | Dowel, Location | 2 |
| 33***56 | Hinge | 6 |
Z62-3-1 Generator Alternator, Uci274d
| 32***08 | Regulator, A.V.R Sx460 | 1 |
| 32***99 | Kit-Rectifier, Service | 1 |
| 33***24 | Regulator, Voltage, Mx341 Avr | 1 |
Z62-2-1 Generator Alternator, Uci224g
| 32***08 | Regulator, A.V.R Sx460 | 1 |
| 32***99 | Kit-Rectifier, Service | 1 |
| 32***79 | Alternator, Assembly, Uci 224 G16 | 1 |
Z62-1-1 Generator Alternator, Uci224e
| 32***08 | Regulator, A.V.R Sx460 | 1 |
| 32***69 | Alternator | 1 |
| 32***99 | Kit-Rectifier, Service | 1 |
Z63-10-1 Kit, Conversion, Can/Usb
| 33***91 | Kit, Can/Usb Converter; Kit Consists Of: Cc/Usb Converter; Usb Cable; Db9 Connector;, Telecontrol Software; Configuration Software | 1 |
Z65-11-5 Electronic Governor
| 13***3Z | Bolt, M6 X 16, Flange Reduced Hex | 1 |
| 32***22 | Sensor, Vr Crankshaft | 1 |
| 32***65 | Plate, Sensor Clamping | 1 |
Z65-11-4 Sensor, Oil Temperature
| 32***15 | G.A, Lube Oil Temp Sensor | 1 |
| 33***10 | Harness, Link, Engine Oil Pressure | 1 |
| 33***41 | Switch, Oil Temperature | 1 |
Z65-2-10 Battery Installation, With Isolator Switch, Tca
| 13***3Z | Bolt, M6 X 16, Flange Reduced Hex | 2 |
| 13***7Z | Bolt, M6 X 25, Flange Head | 2 |
| 13***3Z | Nut | 2 |
Z65-11-3 Oil Pressure Sender
| 14***08 | Seal, Washer | 2 |
| 32***80 | G.A, Oil Pressure Sender | 1 |
| 33***79 | Adapter, Oil Pressure Sender | 1 |
Z65-11-1 Engine Electrics
| 13***7Z | Bolt, M12 X 25mm, Reduce Flange Hex | 3 |
| 13***3Z | Nut | 2 |
| 13***3Z | Nut, Self Lock, M8 | 1 |
Z65-11-2 Coolant Level Switch
| 32***92 | Switch, Coolant Level | 1 |
| 32***65 | G.A, Coolant Level Switch | 1 |
| 33***09 | Harness, Link, Low Coolant | 1 |
Z65-21-1 Engine Block Heater, 110/120v
| 32***50 | Heater, Cylinder Block, 1000w - 120v Mains | 1 |
| 32***53 | Washer, Copper Sealing | 1 |
| 32***82 | Kit-Heater, Engine Block, 120v | 1 |
Z65-22-1 Engine Block Heater, 230/240v
| 32***53 | Washer, Copper Sealing | 1 |
| 32***59 | Element, Engine Block Heater, 230v | 1 |
| 32***60 | Kit-Block Heater, Engine, 230v | 1 |
Z65-11-10 Engine Electrics, Tca
| 13***7Z | Bolt, M12 X 25mm, Reduce Flange Hex | 3 |
| 13***3Z | Nut | 2 |
| 13***3Z | Nut, Self Lock, M8 | 1 |
Z66-1-1 Battery
| 33***50 | Battery, Gel Type | 1 |
G65QX(JCB GENERATOR) serial number reference
Locate the machine identification plate on the generator frame or control panel. Confirm applicability with a JCB dealer using the full serial number.
| Prefix | Identifies | Notes |
|---|---|---|
| 01650000-01699999 | JCB G65QX 1 Generator (50Hz and 60Hz variants documented in parts catalog; applies to 65-140 kVA range with JCB engine) |
Frequently asked questions
What engine does the JCB G65QX use?
The JCB G65QX uses a JCB Dieselmax 444 4-cylinder turbocharged diesel engine, rated at 62 kW (83 hp) at 1500 rpm.
What is the operating weight of the G65QX?
The operating weight varies by configuration: the open frame (G65X) weighs approximately 1100 kg, while the canopy version (G65QX) weighs 1902 kg.
What model replaced the G65QX?
The G65QX was succeeded by the G65QS in the QS series and later by the RS series generators, which feature updated emissions compliance and modern control systems.
What G65QX(JCB GENERATOR) owners discuss
What engine powers the JCB G65QX generator set?
The JCB G65QX is powered by the JCB DieselMaxx GTC-1 S2, a 4-cylinder engine with a mechanical governor. It is available in Tier IIIa emissions compliant configurations.
What are the power ratings for the JCB G65QX?
The unit provides 63 kVA (50.4 kW) for standby power and 58.7 kVA (47 kW) for rated prime power. The rated amps per phase are 91A.
What are the common electrical or sensor issues reported for this generator series?
Common electrical faults include high side driver faults in the Automatic Mains Failure (AMF) unit, open or short circuits to the battery, and MAF (Mass Air Flow) sensor low or high voltage faults. Torque reduction may occur due to rail pressure control system issues or injector drift detection.
What are the typical undercarriage or wear patterns for this machine type?
Not documented for this exact serial range — verify with your dealer
What engine quirks are associated with the JCB DieselMaxx series?
Starting problems are the most common complaint. In cold weather, the engine may crank but fail to fire if the glow plugs are not receiving power or if the relay/timer fails. Low power output can result from fuel system faults or water in the fuel sensor feedback signal plausibility faults.
What is the recommended fluid for the hydraulic system?
Not documented for this exact serial range — verify with your dealer
What should be checked when buying a used G65QX generator?
Verify the engine serial number to confirm the specific DieselMaxx variant. Check the DeepSea 4510 controller for diagnostic trouble codes, specifically looking for P2264 (water in fuel sensor) or P0100 (AMF high side driver) faults. Inspect the 285Ltr bunded integrated fuel tank for corrosion and ensure the MeccAlte ECO 32 2L alternator brushes are intact. Have your dealer verify the emissions compliance status of the specific unit.
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 G65QX(JCB GENERATOR). Related factory variants of the same model family:
G65QX(JCB GENERATOR)
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