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Jcb G144(JCB GENERATOR)
Maintenance schedule, common problems & OEM parts breakdown
The JCB G144 is a diesel generator set within the JCB Power Products range, designed for prime and standby power applications. It utilizes a 4.8 L inline-4 diesel engine, typically an Iveco unit in the X-series configuration, producing approximately 143 kVA. The machine is available in open, canopy, and container configurations. Production years span from the early 2010s through the 2020s, with the G144X and G144QX variants representing the fuel-optimized generation. The G144 serves as a mid-range power solution in the JCB lineup, positioned between the G130 and G175 models, and is part of the broader G-series generator family that includes the G140 and G160 predecessors.
Across the G-series generations, JCB shifted from naturally aspirated engines to turbocharged and aftercooled Dieselmax and EcoMAX engines to meet Stage IV and Tier 4 Final emissions standards without using Diesel Particulate Filters (DPF). This DPF-free design reduces servicing complexity and running costs, making the G144 a durable choice in the used market. The machine's significance lies in its robust powertrain and the availability of its engine components, which are shared with other JCB construction equipment, ensuring long-term parts support and ease of maintenance for fleet operators.
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 G144(JCB GENERATOR) specifications
Engine
| Engine Model | Iveco (per factory spec sheet for G144X/G144QX series) |
| Displacement | 4.8 L |
| Cylinders | 4 (Inline-4) |
| Emissions Tier | Euro Stage V / U.S. EPA Tier 4 Final (varies by configuration/series) |
Weights
| Operating Weight | Not documented for this exact serial range — verify with your dealer |
| Shipping Weight | Not documented for this exact serial range — verify with your dealer |
Dimensions
| Transport Length | Not documented for this exact serial range — verify with your dealer |
| Transport Width | Not documented for this exact serial range — verify with your dealer |
| Transport Height | Not documented for this exact serial range — verify with your dealer |
Performance
| Standby Power (50 Hz) | 143 kVA (114.4 kW / 143.1 kVA range per G144X/QX datasheet) |
| Standby Power (60 Hz) | 145.1 kVA (116.1 kW / 145.1 kVA range per G144X/QX datasheet) |
| Travel Speed | Not applicable (stationary generator set) |
Service capacities (summary)
| Fuel Tank | Not documented for this exact serial range — verify with your dealer |
| Hydraulic System | Not documented for this exact serial range — verify with your dealer |
| Engine Oil | Not documented for this exact serial range — verify with your dealer |
| Cooling System | Not 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 G144(JCB GENERATOR) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the G144(JCB GENERATOR) beyond the schedule
Predictive Maintenance & Fluid Analysis
At the 500-hour interval, take oil samples from the engine, hydraulic system, and fuel lines to establish a baseline. Compare subsequent samples against this baseline to detect early bearing wear, seal degradation, or contamination. Monitor the hydraulic return filter magnet for metallic debris during every 500-hour service. Use JCB Super Universal Agricultural oil or equivalent 15W-40 diesel oil meeting the machine's API specification. Regular fluid analysis prevents catastrophic failure by identifying issues 500 to 800 hours before they manifest as operational faults.
Corrective & Common Repairs
Common repairs on the G144 involve the Dieselmax engine's common-rail fuel system. Replace primary and secondary fuel filters at 500 hours to protect injectors from contamination. Inspect the turbocharger shaft play and charge cooler boot condition at 1000 hours to prevent boost leaks. Check the alternator and starter load tests annually. Address any ECU fault codes using JCB 444 Engine Diagnostics software. Ensure all electrical connections are tight to prevent voltage drops in the JCB Digital Control Panel, which monitors engine parameters and alternator output.
Overhaul & Rebuild Points
The 2000-hour deep service is the critical overhaul point. Drain and clean the hydraulic tank, then refill with JCB-spec hydraulic oil. Inspect the structural chassis and side frames for cracking or unauthorized welding. Measure swing ring play using dial indicators to assess bearing wear. Service the brake discs and immersed brake condition. Check injector spray patterns and replace as required. This interval determines the machine's remaining useful life; neglecting it often leads to premature replacement rather than repair.
Seasonal & Environment Servicing
In cold environments below 4°C, use JCB Super Universal Agricultural oil rated for -15°C to 30°C. In hot environments, monitor the coolant expansion tank for silicate separation, indicated by brown sludge. Replace engine coolant at 1000-hour intervals to maintain corrosion protection. Inspect the cab HVAC system, including A/C pressure and evaporator condition, to ensure operator comfort. Check the battery electrolyte level and terminal tightness regularly, as temperature extremes affect battery performance. Ensure the canopy ventilation is clear to prevent overheating in enclosed spaces.
G144(JCB GENERATOR) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 32/925879 | Filter, Fuel | Fuel system service | Check fitment → |
| 32/925884 | Element, Fuel Filter | Fuel system service | Check fitment → |
| 32/925898 | Filter, Fuel Assembly | Fuel system service | Check fitment → |
| 32/925899 | Element, Fuel Filter | Fuel system service | Check fitment → |
| 32/925900 | Filter, Fuel Assembly | Fuel system service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
G144(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 pump pressure |
| P0117 | Engine coolant temperature sensor circuit low voltage | Faulty coolant temperature sensor, shorted wiring, or low coolant level | Inspect sensor wiring and verify coolant level |
| P0521 | Engine oil pressure sensor range/performance issue | Faulty oil pressure sensor or low engine oil level | Check oil level and test sensor signal |
| P2047 | DEF/AdBlue injector circuit open (SCR system fault) | Open circuit in the reductant injector wiring or faulty injector | Inspect injector connector and wiring harness for damage |
| U0100 | Lost communication with Engine Control Module (ECM) | Loose battery terminals, poor ground straps, or CAN bus network fault | Check battery voltage and clean ground connections |
| P0335 | Crankshaft Position Sensor "A" Circuit (No Signal) | Failed crank sensor or damaged signal ring | Inspect sensor and wiring for continuity |
| P0102 | MAF (Manifold Absolute Flow) sensor low voltage fault | Dirty or faulty MAF sensor, or intake air leak | Clean MAF sensor and check intake ducting |
| P0321 | CAN bus message error for engine speed from engine ECU | CAN bus communication fault or sensor signal loss | Check CAN bus wiring and connector integrity |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
G144(JCB GENERATOR) attachments & work tools
Generator Enclosure Types
The G144 model is offered in Open and Canopy configurations, as listed in the JCB Power Products range documentation for the G144X and G144QX variants.
Engine Platform
The G144 generator set utilizes an IVECO engine, as specified in the JCB Power Products technical data for the G144X and G144QX models.
Control Systems
Standard equipment includes the JCB CP1 digital control panel, with optional upgrades to the JCB CP2 and JCB ATP1 control panels for enhanced monitoring and control capabilities.
Power Output Class
The G144 series falls within the 143–220 kVA fuel-optimized generator range, covering prime and standby ratings for regulated diesel gensets.
Emissions Compliance
JCB generator engines in this class are available in Stage V, EPA Tier 4 Final, and EPA Tier 3 variants, with the 4.8 L inline-4 diesel platform being a common configuration for compact regulated sets.
Telematics
Integrated telematics are available on JCB generators to assist in assessing work schedules and monitoring machine condition, as noted in customer support documentation.
All G144(JCB GENERATOR) assemblies by section
Every catalogued assembly group for the Jcb G144(JCB GENERATOR). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Z Generator Sets 100/200 Series
Z0-1-1 Generator Set, G100 90kva, 50hz 380/415v Prime
| 32***26 | Jcb, Generator G100, 90kva | 1 |
Z0-13-1 Generator Set, G220q 200kva, 50hz 400v Prime
| 32***38 | Jcb, Generator G220q, 200kva | 1 |
Z0-7-1 Generator Set, G144 130kva, 50hz 400v Prime
| 32***32 | Jcb, Generator G144, 130kva | 1 |
Z0-8-1 Generator Set, G144q 130kva, 50hz 400v Prime
| 32***33 | Jcb, Generator G144q, 130kva | 1 |
Z0-2-1 Generator Set, G100q 90kva, 50hz 380/415v Prime
| 32***27 | Jcb, Generator G100q, 90kva | 1 |
Z0-12-1 Generator Set, G220 200kva, 50hz 400v Prime
| 32***37 | Jcb, Generator G220, 200kva | 1 |
Z0-10-1 Generator Set, G175q 160kva, 50hz 400v Prime
| 32***35 | Jcb, Generator G175q, 160kva | 1 |
Z0-6-1 Generator Set, G130r 130kva, 50hz 400v Prime
| 32***31 | Jcb, Generator G130r, 130kva | 1 |
Z0-4-1 Generator Set, G110 100kva, 50hz 380/415v Prime
| 32***29 | Jcb, Generator G110, 100kva | 1 |
Z0-3-1 Generator Set, G100r 100kva, 50hz 380/415v Prime
| 32***28 | Jcb, Generator G100r, 100kva | 1 |
Z0-11-1 Generator Set, G200r 200kva, 50hz 400v Prime
| 32***36 | Jcb, Generator G200r, 200kva | 1 |
Z0-5-1 Generator Set, G110q 100kva, 50hz 380/415v Prime
| 32***30 | Jcb, Generator G110q, 100kva | 1 |
Z0-9-1 Generator Set, G175 160kva, 50hz 400v Prime
| 32***34 | Jcb, Generator G175, 160kva | 1 |
Z0-14-1 Generator Set, G160r
| 32***35 | Jcb, Genertaor Set | 1 |
Z1-11-1 Engine Assembly, 620 61100 Dsrg, 116/1500
| 32***82 | Engine Assembly, 620 Dsrg | 1 |
Z1-1-1 Engine Assembly, 420 61070 Dsrg, 79/1500
| 32***80 | Engine, Assembly, 420 Dsrg | 1 |
Z1-13-1 Engine Assembly, 634 61102 Dsrag, 182/1500
| 32***84 | Engine, Assembly, 634 Dsrag | 1 |
Z1-2-1 Engine Assembly, 420 61071 Dsrag, 95/1500
| 32***81 | Engine, Assembly, 420 Dsrag | 1 |
Z1-12-1 Engine Assembly, 620 61101 Dsrag, 147/1500
| 32***83 | Engine, Assembly, 620 Dsrag | 1 |
Z2-1-1 Service Tools
| 89***15 | Tool, Rear Seal Installer | 1 |
| 89***50 | Tool, Front Seal Installer | 1 |
Z4-11-1 Gasket Set Top, 620 Dsrg/620 Dsrag
| 02***90 | Kit-Gasket, Cylinder Head | 1 |
Z4-2-1 Gasket Set, Overhaul, 420 Dsrg/420 Dsrag
| 02***11 | Kit-Gasket, Major Overhaul | 1 |
Z4-12-1 Gasket Set Overhaul, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***89 | Kit-Gasket | 1 |
Z4-1-1 Gasket Set Top, 420 Dsrg/420 Dsrag
| 02***12 | Kit-Gasket, Cylinder Head | 1 |
Z5-1-1 Kit-Engine Overhaul, 420 Dsrg/420 Dsrag
| 02***04 | Liner, Cylinder | 4 |
| 02***71 | Piston, Assembly | 4 |
| 02***75 | Bearing, Big-End | 4 |
Z5-11-1 Kit-Engine Overhaul, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***04 | Liner, Cylinder | 6 |
| 02***71 | Piston, Assembly | 6 |
| 02***75 | Bearing, Big-End | 6 |
Z6-2-1 Fuel Filter, 420 Dsrg/420 Dsrag
| 02***77 | Washer, Sealing | 2 |
| 32***79 | Filter, Fuel | 1 |
| 32***80 | Screw | 1 |
Z6-11-1 Filter Fuel Sediment, 620 Dsrg/620 Dsrag, 634 Dsrag
| 32***98 | Filter, Fuel Assembly | 1 |
| 32***99 | Element, Fuel Filter | 1 |
Z6-13-1 Filter, Oil, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***01 | Filter, Oil | 1 |
Z6-3-1 Filter, Oil, 420 Dsrg/420 Dsrag
| 02***01 | Filter, Oil | 1 |
Z6-12-1 Fuel Filter, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***77 | Washer, Sealing | 2 |
| 32***80 | Screw | 2 |
| 32***81 | Washer | 2 |
Z6-1-1 Filter Fuel Sediment, 420 Dsrg/420 Dsrag
| 32***77 | Filter, Head | 1 |
| 32***78 | Element, Fuel Filter | 1 |
Z8-13-1 Crankshaft Pulley, 634 Dsrag
| 02***86 | Screw, M8x35 | 6 |
| 02***92 | Screw, M8x25 | 3 |
| 02***37 | Damper, Crankshaft Vibration | 1 |
Z8-2-1 Front End Drive, 420 Dsrg/420 Dsrag
| 02***39 | Sleeve | 1 |
| 02***40 | Pulley, Water Pump | 1 |
| 02***41 | Screw | 1 |
Z8-12-1 Front End Drive, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***18 | Nut | 1 |
| 02***20 | Pulley, Water Pump | 1 |
| 02***24 | Screw, M10x30 | 6 |
Z8-11-1 Crankshaft Pulley, 620 Dsrg/620 Dsrag
| 02***86 | Screw, M8x35 | 6 |
| 02***92 | Screw, M8x25 | 3 |
| 02***38 | Nut | 1 |
Z8-1-1 Crankshaft Pulley, 420 Dsrg/420 Dsrag
| 02***84 | Pulley, V Belt | 1 |
| 02***85 | Nut | 1 |
| 02***86 | Screw, M8x35 | 6 |
Z9-11-1 Starter Motor, 620 Dsrg/620 Dsrag, 634 Dsrag
| 71***41 | Kit-Lever, Solenoid Engaging | 1 |
| 71***42 | Kit-Sundry Parts | 1 |
| 71***44 | Motor, Starter | 1 |
Z9-1-1 Starter Motor, 420 Dsrg/420 Dsrag
| 71***41 | Kit-Lever, Solenoid Engaging | 1 |
| 71***42 | Kit-Sundry Parts | 1 |
| 71***44 | Motor, Starter | 1 |
Z9-12-1 Starter Motor, 620 Dsrg/620 Dsrag, 634 Dsrag
| 71***26 | Motor, Starter | 1 |
| 71***27 | Holder, Brush Assembly | 1 |
| 71***28 | Kit-Brush | 1 |
Z9-2-1 Starter Motor, 420 Dsrg/420 Dsrag
| 71***26 | Motor, Starter | 1 |
| 71***27 | Holder, Brush Assembly | 1 |
| 71***28 | Kit-Brush | 1 |
Z10-12-1 Alternator Mountings, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***42 | Nut, M8 | 1 |
| 02***49 | Washer | 2 |
| 02***43 | Screw, M8x30 | 2 |
Z10-2-1 Alternator Mountings, 420 Dsrg/420 Dsrag
| 02***27 | Screw | 1 |
| 02***31 | Screw | 1 |
| 02***42 | Nut, M8 | 1 |
Z10-11-1 Alternator, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***60 | Pulley, Alternator | 1 |
| 71***18 | Alternator, 12v, 65amp; Use Existing Pulley Or Order Item Number 8. This Unit Is Supplied As Standard With Singlegroove Pulley, Application Requires Twin., Alternator, 12v, 65amp | 1 |
| 71***20 | Fan | 1 |
Z10-1-1 Alternator, 420 Dsrg/420 Dsrag
| 71***18 | Alternator, 12v, 65amp; Use Existing Pulley Or Order Item Number 8. This Unit Is Supplied As Standard With Singlegroove Pulley, Application Requires Twin., Alternator, 12v, 65amp | 1 |
| 71***19 | Pulley | 1 |
| 71***20 | Fan | 1 |
Z12-13-2 Fuel Pipework, Low Pressure, 634 Dsrag
| 02***11 | Washer, Sealing | 2 |
| 02***21 | Washer, Sealing | 2 |
| 02***46 | Screw, M8x35 | 1 |
Z12-3-1 Fuel Pipework, Low Pressure, 420 Dsrg/420 Dsrag
| 02***11 | Washer, Sealing | 2 |
| 02***21 | Washer, Sealing | 1 |
| 02***31 | Screw | 2 |
Z12-11-3 Fuel Pipework, High Pressure, 634 Dsrag
| 02***21 | Washer, Sealing | 1 |
| 02***56 | Bolt, Banjo | 4 |
| 02***57 | Washer, Sealing | 16 |
Z12-12-1 Fuel Pipework, Low Pressure, Pre-Filter, 620 Dsrg/620 Dsrag/634 Dsrag
| 02***27 | Screw | 2 |
| 02***42 | Nut, M8 | 2 |
| 02***38 | Washer, Sealing | 5 |
Z12-11-1 Fuel Pipework, High Pressure, 620 Dsrg
| 02***21 | Washer, Sealing | 1 |
| 02***56 | Bolt, Banjo | 4 |
| 02***57 | Washer, Sealing | 16 |
Z12-1-1 Fuel Pipework, High Pressure, 420 Dsrg/420 Dsrag
| 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 |
Z12-13-1 Fuel Pipework, Low Pressure, 620 Dsrg/620 Dsrag
| 02***11 | Washer, Sealing | 2 |
| 02***21 | Washer, Sealing | 2 |
| 02***46 | Screw, M8x35 | 1 |
Z12-11-2 Fuel Pipework, High Pressure, 620 Dsrag
| 02***21 | Washer, Sealing | 1 |
| 02***56 | Bolt, Banjo | 4 |
| 02***57 | Washer, Sealing | 16 |
Z12-2-1 Fuel Pipework, Low Pressure, Pre-Filter, 420 Dsrg/420 Dsrag
| 32***39 | Bolt, Banjo M12 | 2 |
| 32***71 | G.A, Ga Fuel Pipes(Hp/Lp), Genset | 0 |
| 32***33 | Ring, Snap | 1 |
Z13-14-1 Fuel Injector, 634 61102 Dsrag
| 02***42 | Nut, M8 | 12 |
| 17***00 | Injector, Assembly | 6 |
| 17***01 | Nozzle, Injector | 1 |
Z13-1-1 Fuel Injector, 420 61070 Dsrg, 420 61071 Dsrag
| 02***42 | Nut, M8 | 8 |
| 17***00 | Injector, Assembly | 4 |
| 17***01 | Nozzle, Injector | 1 |
Z13-11-1 Fuel Injector, 620 61100 Dsrg, 116/1500
| 02***42 | Nut, M8 | 12 |
| 17***02 | Washer | 6 |
| 17***03 | Ring, Rubber | 6 |
Z13-12-1 Fuel Injector, 620 61101 Dsrag, 147/1500
| 02***42 | Nut, M8 | 12 |
| 17***02 | Washer | 6 |
| 17***03 | Ring, Rubber | 6 |
Z14-1-1 Fuel Lift Pump, 420 Dsrg/420 Dsrag
| 02***91 | Washer | 2 |
| 02***92 | Screw, M8x25 | 4 |
| 17***00 | Pump, Fuel Lift | 1 |
Z14-11-1 Fuel Lift Pump, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***91 | Washer | 2 |
| 02***92 | Screw, M8x25 | 4 |
| 17***00 | Pump, Fuel Lift | 1 |
Z15-13-1 Fuel Injection Pump, 634 61102 Dsrag, 182/1500
| 02***42 | Nut, M8 | 2 |
| 02***49 | Washer | 3 |
| 02***47 | O Ring | 1 |
Z15-12-1 Fuel Injection Pump, 620 61101 Dsrag, 147/1500
| 02***42 | Nut, M8 | 2 |
| 02***49 | Washer | 3 |
| 02***47 | O Ring | 1 |
Z15-1-1 Fuel Injection Pump, 420 61070 Dsrg, 79/1500
| 02***42 | Nut, M8 | 2 |
| 02***47 | O Ring | 1 |
| 02***48 | Nut | 1 |
Z15-11-1 Fuel Injection Pump, 620 61100 Dsrg, 116/1500
| 02***42 | Nut, M8 | 2 |
| 02***49 | Washer | 3 |
| 02***47 | O Ring | 1 |
Z15-2-1 Fuel Injection Pump, 420 61071 Dsrag, 95/1500
| 02***42 | Nut, M8 | 2 |
| 02***47 | O Ring | 1 |
| 02***48 | Nut | 1 |
Z16-11-1 Water Pump, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***13 | Plug | 2 |
| 02***14 | Washer, Sealing | 2 |
| 02***31 | Screw | 2 |
Z16-1-1 Water Pump, 420 Dsrg/420 Dsrag
| 02***13 | Plug | 2 |
| 02***14 | Washer, Sealing | 2 |
| 02***15 | Pump, Water Assembly | 1 |
Z18-12-1 Thermostat & Housing, 634 Dsrag
| 02***50 | Screw, M8x50 | 4 |
| 02***73 | Washer | 4 |
| 02***34 | Gasket | 1 |
Z18-11-1 Thermostat & Housing, 620 Dsrg/620 Dsrag
| 02***13 | Plug | 1 |
| 02***14 | Washer, Sealing | 1 |
| 02***50 | Screw, M8x50 | 4 |
Z18-1-1 Thermostat & Housing, 420 Dsrg/420 Dsrag
| 02***13 | Plug | 1 |
| 02***14 | Washer, Sealing | 1 |
| 02***27 | Screw | 1 |
Z19-11-1 Rocker Cover, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***14 | Screw | 4 |
| 02***15 | Washer | 4 |
| 02***16 | Washer, Rubber | 4 |
Z19-1-1 Rocker Cover, 420 Dsrg/420 Dsrag
| 02***12 | Cover, Rocker | 1 |
| 02***13 | Gasket | 1 |
| 02***14 | Screw | 4 |
Z20-11-1 Rocker Shaft, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***87 | Nut | 6 |
| 02***88 | Screw, Adjusting | 6 |
| 02***89 | Plug | 2 |
Z20-1-1 Rocker Shaft, 420 Dsrg/420 Dsrag
| 02***87 | Nut | 8 |
| 02***88 | Screw, Adjusting | 8 |
| 02***89 | Plug | 2 |
Z21-11-1 Valves & Push-Rods, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***95 | Rod, Push | 8 |
| 02***96 | Tappet | 8 |
Z21-1-1 Valves & Push-Rods, 420 Dsrg/420 Dsrag
| 02***95 | Rod, Push | 8 |
| 02***96 | Tappet | 8 |
Z22-12-1 Turbocharger, 634 61102 Dsrag
| 02***72 | Gasket | 1 |
| 02***73 | Gasket | 1 |
| 02***74 | Gasket | 1 |
Z22-1-1 Turbocharger, 420 61070 Dsrg, 79/1500
| 02***42 | Nut, M8 | 4 |
| 02***47 | Gasket | 1 |
| 02***50 | Turbocharger, 79kw Engine | 1 |
Z22-11-1 Turbocharger, 620 61100 Dsrg, 620 61101 Dsrag
| 02***72 | Gasket | 1 |
| 02***73 | Gasket | 1 |
| 02***74 | Gasket | 1 |
Z22-2-1 Turbocharger, 420 61071 Dsrag, 95/1500
| 02***42 | Nut, M8 | 4 |
| 02***47 | Gasket | 1 |
| 02***62 | Flange | 1 |
Z23-12-1 Turbo Pipework, 634 Dsrag
| 02***19 | Washer, Sealing | 1 |
| 02***52 | Connector | 1 |
| 02***82 | Screw, M8x20 | 2 |
Z23-11-1 Turbo Pipework, 620 Dsrg/620 Dsrag
| 02***19 | Washer, Sealing | 1 |
| 02***52 | Connector | 1 |
| 02***59 | Hose | 1 |
Z23-1-1 Turbo Pipework, 420 Dsrg/420 Dsrag
| 02***19 | Washer, Sealing | 1 |
| 02***21 | Washer, Sealing | 2 |
| 02***48 | Pipe | 1 |
Z25-1-1 Induction Manifold, 420 Dsrg/420 Dsrag
| 02***39 | Gasket | 1 |
| 02***41 | Screw, M8x70 | 8 |
| 02***42 | Screw, M6x25 | 1 |
Z25-11-1 Induction Manifold, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***48 | Screw, M8x60 | 5 |
| 02***51 | Screw, M8x65 | 7 |
| 02***44 | Screw, M8x90 | 2 |
Z26-1-1 Exhaust Manifold, 420 Dsrg/420 Dsrag
| 02***38 | Screw, M10x100 | 8 |
| 02***40 | Manifold, Exhaust | 1 |
| 02***45 | Manifold, Intake | 4 |
Z26-11-1 Exhaust Manifold, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***46 | Cover | 1 |
| 02***61 | Nut | 12 |
| 02***62 | Stud, M10x100 | 12 |
Z27-11-1 Cylinder Head, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***13 | Plug | 1 |
| 02***14 | Washer, Sealing | 2 |
| 02***25 | Connector | 1 |
Z27-1-1 Cylinder Head, 420 Dsrg/420 Dsrag
| 02***13 | Plug | 1 |
| 02***99 | Cotter | 16 |
| 02***01 | Plate, Spring | 8 |
Z28-1-1 Lifting Brackets, 420 Dsrg/420 Dsrag
| 02***20 | Screw, M10x25 | 4 |
| 02***21 | Plate, Engine Lifting | 2 |
Z28-11-1 Lifting Brackets, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***57 | Nut, M10 | 2 |
| 02***20 | Screw, M10x25 | 2 |
| 02***21 | Plate, Engine Lifting | 2 |
Z29-1-1 Oil Cooler, 420 Dsrg/420 Dsrag
| 02***14 | Washer, Sealing | 1 |
| 02***42 | Screw, M6x25 | 1 |
| 02***54 | Clamp | 4 |
Z29-11-1 Oil Cooler, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***14 | Washer, Sealing | 1 |
| 02***51 | Screw, M8x65 | 1 |
| 02***54 | Clamp | 4 |
Z30-11-1 Oil Level Dipstick, 620 Dsrg/620 Dsrag
| 02***80 | Dipstick | 1 |
Z30-1-1 Oil Level Dipstick, 420 Dsrg/420 Dsrag
| 02***75 | Dipstick | 1 |
Z30-12-1 Oil Level Dipstick, 634 Dsrag
| 02***89 | Dipstick | 1 |
Z31-11-1 Oil Sump, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***18 | Plug | 1 |
| 02***53 | Screw, M8x16 | 1 |
| 02***73 | Washer | 4 |
Z31-1-1 Oil Sump, 420 Dsrg/420 Dsrag
| 02***42 | Nut, M8 | 1 |
| 02***19 | Washer, Sealing | 1 |
| 02***70 | Sump | 1 |
Z32-1-1 Oil Pump, 420 Dsrg/420 Dsrag
| 02***80 | Pump, Oil Assembly | 1 |
| 02***83 | Nut, M10 | 1 |
| 02***84 | Washer | 1 |
Z32-2-1 Oil Relief Valve, 420 Dsrg/420 Dsrag
| 02***82 | Screw, M8x20 | 2 |
| 02***09 | Seat, Valve | 1 |
| 02***10 | Valve, Control | 1 |
Z32-11-1 Oil Pump, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***83 | Nut, M10 | 1 |
| 02***84 | Washer | 1 |
| 02***85 | Gear | 1 |
Z32-12-1 Oil Relief Valve, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***82 | Screw, M8x20 | 2 |
| 02***09 | Seat, Valve | 1 |
| 02***12 | Gasket | 1 |
Z33-11-1 Flywheel Assembly, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***60 | Flywheel | 1 |
| 02***62 | Gear, Starter Ring | 1 |
| 02***65 | Screw | 8 |
Z33-1-1 Flywheel Assembly, 420 Dsrg/420 Dsrag
| 02***60 | Flywheel | 1 |
| 02***62 | Gear, Starter Ring | 1 |
| 02***65 | Screw | 8 |
Z34-1-1 Flywheel Housing, 420 Dsrg/420 Dsrag
| 02***13 | Plug | 2 |
| 02***29 | Pin | 2 |
| 02***54 | Seal, Oil | 1 |
Z34-11-1 Flywheel Housing, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***13 | Plug | 2 |
| 02***29 | Pin | 2 |
| 02***54 | Seal, Oil | 1 |
Z35-11-1 Camshaft/Idler Gear, 620 Dsrg/620 Dsrag, 634 Dsrag
| 02***32 | Shaft | 1 |
| 02***33 | Gear | 1 |
| 02***34 | Bush | 1 |
Z35-1-1 Camshaft/Idler Gear, 420 Dsrg/420 Dsrag
| 02***32 | Shaft | 1 |
| 02***33 | Gear | 1 |
| 02***34 | Bush | 1 |
Z36-1-1 Timing Case & Covers, 420 Dsrg/420 Dsrag
| 02***07 | Plug | 1 |
| 02***26 | Gasket | 1 |
| 02***27 | Screw | 12 |
Z36-11-1 Timing Case & Covers, 620 Dsrg/620 Dsrag
| 02***07 | Plug | 1 |
| 02***26 | Gasket | 1 |
| 02***27 | Screw | 12 |
Z36-12-1 Timing Case & Covers, 634 Dsrag
| 02***07 | Plug | 1 |
| 02***26 | Gasket | 1 |
| 02***27 | Screw | 12 |
Z37-12-1 Piston & Con-Rod, Assemblies, 634 Dsrag
| 02***72 | Kit-Piston Ring | 1 |
| 02***73 | Screw | 2 |
| 02***74 | Bush, Small-End | 1 |
Z37-1-1 Piston & Con-Rod, Assemblies, 420 Dsrg/420 Dsrag
| 02***71 | Piston, Assembly | 4 |
| 02***72 | Kit-Piston Ring | 1 |
| 02***73 | Screw | 2 |
Z37-11-1 Piston & Con-Rod, Assemblies, 620 Dsrg/620 Dsrag
| 02***71 | Piston, Assembly | 4 |
| 02***72 | Kit-Piston Ring | 1 |
| 02***73 | Screw | 2 |
Z38-12-1 Crankshaft Assembly, 634 Dsrag
| 02***69 | Key | 1 |
| 02***76 | Kit-Main Bearing | 5 |
| 02***77 | Kit-Thrust Washer | 2 |
Z38-11-1 Crankshaft Assembly, 620 Dsrg/620 Dsrag
| 02***69 | Key | 1 |
| 02***76 | Kit-Main Bearing | 5 |
| 02***77 | Kit-Thrust Washer | 2 |
Z38-1-1 Crankshaft Assembly, 420 Dsrg/420 Dsrag
| 02***69 | Key | 1 |
| 02***70 | Crankshaft | 1 |
| 02***76 | Kit-Main Bearing | 5 |
Z39-11-1 Cylinder Block, 620 Dsrg/620 Dsrag
| 02***01 | Bush | 6 |
| 02***02 | Sleeve, Guide | 14 |
| 02***03 | Screw | 14 |
Z39-1-1 Cylinder Block, 420 Dsrg/420 Dsrag
| 02***00 | Block, Cylinder Assembly | 1 |
| 02***01 | Bush | 1 |
| 02***02 | Sleeve, Guide | 10 |
Z39-12-1 Cylinder Block, 634 Dsrag
| 02***01 | Bush | 6 |
| 02***02 | Sleeve, Guide | 14 |
| 02***03 | Screw | 14 |
Z43-1-1 Air Filter, Installation
| 32***04 | Valve, Dust | 1 |
| 32***10 | Clip | 3 |
| 32***85 | Filter Aiir Assembly | 1 |
Z43-11-1 Air Filter, Installation
| 32***00 | Band, Mounting | 1 |
| 32***06 | Valve, Dust | 1 |
| 32***07 | Clip | 1 |
Z45-1-1 Exhaust Silencer, Open Build
| 02***79 | Gasket | 1 |
| 13***7D | Capscrew | 6 |
| 32***60 | Pipe, Exhaust Outlet Elbow | 1 |
Z45-11-1 Exhaust System, Canopy Build
| 02***79 | Gasket | 1 |
| 13***5Z | Screw, M10 X 20mm Long; Use With Single Piece Casing. To Gearbox Number 445/143/831 Or 445/144/455, Screw, M10 X 20mm Long | 4 |
| 13***7D | Capscrew | 6 |
Z46-11-1 Radiator & Fittings, 620dsrg
| 13***5D | Setscrew, M6 X 20mm Long | 0 |
| 13***3D | Nut, M6 Lock | 0 |
| 14***6D | Washer, M6 Plain | 0 |
Z47-11-1 Cooler Assembly, 620dsrag
| 13***5D | Setscrew, M6 X 20mm Long | 24 |
| 13***7D | Setscrew, M8x25 | 4 |
| 13***3D | Nut, M6 Lock | 24 |
Z47-12-1 Cooler Assembly, 634dsrag
| 30***85 | Cap, Radiator Pressure | 1 |
| 30***05 | Guard, Fan, Left Hand | 1 |
| 30***06 | Guard, Fan, Right Hand | 1 |
Z48-11-1 Radiator, Hose & Pipework, 620dsrg
| 30***79 | Clip | 1 |
| 30***93 | Clip | 4 |
| 30***94 | Clip, 40 - 60 | 3 |
Z48-13-1 Radiator/Cooler, Hose & Pipework, 634dsrag
| 30***79 | Clip | 1 |
| 30***93 | Clip | 4 |
| 30***94 | Clip, 40 - 60 | 3 |
Z48-12-1 Radiator/Cooler, Hose & Pipework, 620dsrag
| 30***79 | Clip | 1 |
| 30***93 | Clip | 4 |
| 30***94 | Clip, 40 - 60 | 3 |
Z48-21-1 Radiator, Coolant Drain
| 32***70 | Valve, 1/2"Bsp Female, 1/2"Bsp Male | 1 |
| 32***71 | Adapter, 1/2"Bsp M 1/2"Tail | 1 |
| 32***72 | Hose, Fuel 1/2"Bore | 1 |
Z49-2-1 Cooling Fan & Spacer
| 32***52 | Fan Cooling | 1 |
Z49-1-1 Cooling Fan & Spacer
| 32***23 | Fan Cooling | 1 |
Z49-3-1 Cooling Fan & Spacer
| 32***57 | Fan Cooling | 1 |
Z50-1-1 Fuel Pipes, Fuel Tank To Filter
| 32***16 | Hose, Fuel Supply | 2 |
| 32***68 | Clip, 6mm Hose | 4 |
| 32***75 | Adapter, 3/8" Bsp F 3/8" Tail | 1 |
Z51-11-1 Fuel Filter, Sediment ( Racor )
| 32***11 | Filter, Fuel, Assembly | 1 |
| 32***12 | Element, Fuel Filter | 1 |
| 32***41 | O Ring | 1 |
Z57-1-1 Engine Oil Drain
| 14***19 | Seal, Dowty | 1 |
| 22***03 | Clip, Jubilee | 2 |
| 32***71 | Adapter, 1/2"Bsp M 1/2"Tail | 2 |
Z60-2-1 Base & Fittings
| 13***8D | Setscrew, M12 X 30 | 0 |
| 13***3D | Nut, M12 | 0 |
| 14***9D | Washer, M12 | 0 |
Z60-1-1 Base & Fittings
| 13***8D | Setscrew, M12 X 30 | 0 |
| 13***3D | Nut, M12 | 0 |
| 14***9D | Washer, M12 | 0 |
Z60-5-1 Lifting Bracket, (Optional)
| 13***2D | Setscrew, M16 X 50mm | 8 |
| 13***3D | Nut, M16 | 8 |
| 14***1D | Washer, M16 | 16 |
Z60-11-1 Fuel Tank
| 32***18 | Cap, Fuel Tank | 1 |
| 32***32 | Guage Fuel | 1 |
| 32***77 | Plug, 1.5"Bsp | 5 |
Z61-4-1 Canopy, Rear Section
| 13***5D | Setscrew, M8x20 | 20 |
| 14***7D | Washer, M8 Plain | 20 |
| 14***7D | Washer, M8 Spring | 20 |
Z61-1-1 Canopy Assembly
| 32***80 | Canopy, Assembly | 1 |
| 32***81 | Canopy, Middle Section | 1 |
| 32***82 | Canopy, Front Section | 1 |
Z61-3-1 Canopy, Front Section
| 13***5D | Setscrew, M8x20 | 12 |
| 14***7D | Washer, M8 Plain | 12 |
| 14***7D | Washer, M8 Spring | 12 |
Z61-2-1 Canopy, Middle Section
| 13***5D | Setscrew, M8x20 | 84 |
| 14***7D | Washer, M8 Plain | 84 |
| 14***7D | Washer, M8 Spring | 84 |
Z61-21-1 Canopy Soundproofing
| 32***39 | Kit-Panel, Soundproofing, Middle Section | 1 |
| 32***40 | Kit-Panel, Soundproofing, Front Section | 1 |
| 32***41 | Kit-Panel, Foil Backed, Rear Section | 1 |
Z62-1-1 Alternator, Uci 274c-16
| 32***08 | Regulator, A.V.R Sx460 | 1 |
| 32***57 | Bearing, Nde | 1 |
| 32***99 | Kit-Rectifier, Service | 1 |
Z62-4-1 Alternator, Uci 274h-16
| 32***08 | Regulator, A.V.R Sx460 | 1 |
| 32***57 | Bearing, Nde | 1 |
| 32***99 | Kit-Rectifier, Service | 1 |
Z62-6-1 Alternator, Uci 274 H16
| 32***07 | Kit, Rectifier | 1 |
| 32***08 | Regulator, A.V.R Sx460 | 1 |
| 32***09 | Bearing, Nde | 1 |
Z62-11-1 Alternator, Accessories
| 13***5D | Setscrew, M6 X 20mm Long | 6 |
| 13***3D | Nut, M6 Lock | 6 |
| 14***6D | Washer, M6 Plain | 12 |
Z62-2-1 Alternator, Uci 274e-16
| 32***08 | Regulator, A.V.R Sx460 | 1 |
| 32***57 | Bearing, Nde | 1 |
| 32***99 | Kit-Rectifier, Service | 1 |
Z62-5-1 Alternator, Uci 274 F16
| 32***07 | Kit, Rectifier | 1 |
| 32***08 | Regulator, A.V.R Sx460 | 1 |
| 32***09 | Bearing, Nde | 1 |
Z62-3-1 Alternator, Uci 274f-16
| 32***08 | Regulator, A.V.R Sx460 | 1 |
| 32***57 | Bearing, Nde | 1 |
| 32***99 | Kit-Rectifier, Service | 1 |
Z63-12-1 Control Unit, Box & Panel Assemblies
| 13***3D | Setscrew | 4 |
| 13***5D | Setscrew, M6 X 20mm Long | 4 |
| 14***6D | Washer, M6 Plain | 8 |
Z63-1-1 Control Box & Panel, Assemblies
| 13***1D | Screw, Set M6x12 | 2 |
| 13***5D | Setscrew, M8x20 | 8 |
| 14***6D | Washer, M6 Plain | 2 |
Z64-12-1 Circuit, Breaker, Box Assembly
| 13***5D | Setscrew, M6 X 20mm Long | 86 |
| 13***5D | Setscrew, M8x20 | 37 |
| 14***6D | Washer, M6 Plain | 86 |
Z64-1-1 Circuit Breaker Box, Assembly
| 13***5D | Setscrew, M6 X 20mm Long | 12 |
| 13***0D | Screw, Set | 2 |
| 13***5D | Setscrew, M8x20 | 18 |
Z64-11-1 Circuit, Breaker, Box Assembly
| 13***5D | Setscrew, M6 X 20mm Long | 86 |
| 13***5D | Setscrew, M8x20 | 37 |
| 14***6D | Washer, M6 Plain | 86 |
Z65-11-1 Battery Installation
| 13***0D | Setscrew, M10 X 40mm | 4 |
| 13***3D | Nut, Self Lock M10 | 4 |
| 14***8D | Washer, M10 | 8 |
Z65-1-1 Engine Electrics
| 13***8D | Setscrew, M10 X 30 | 2 |
| 14***8D | Washer, M10 | 2 |
| 14***8D | Washer, Spring, M10 | 2 |
Z65-2-1 Engine Speed Sensor
| 32***15 | Sensor Magnetic Pick | 1 |
G144(JCB GENERATOR) serial number reference
The machine identification plate is located on the generator set frame. Verify applicability with a JCB dealer using the specific serial number.
| Prefix | Identifies | Notes |
|---|---|---|
| 1650000 to 1699999 | Applicable to JCB GENERATOR SET models G130RX, G144X, G144QX, G160RX, G175X, G175QX, G200RX, G220X, and G220QX. |
Frequently asked questions
What engine does the JCB G144 use?
The JCB G144 uses a 4.8 L inline-4 diesel engine, typically an Iveco unit in the X-series configuration, designed to meet Stage IV and Tier 4 Final emissions standards without a DPF.
What is the operating weight of the JCB G144?
The operating weight varies by configuration (open, canopy, or container) and is not explicitly stated in the provided sources; verify with the specific serial range documentation.
What replaced the JCB G144?
The G144 is part of the G-series generator family, which includes the G140, G160, and G175 models. Specific successor models are not explicitly named in the sources, but the G144X and G144QX variants represent the fuel-optimized generation within this lineage.
What G144(JCB GENERATOR) owners discuss
What engine family powers the JCB G144 generator set, and what are the known failure patterns for this generation?
The JCB G144 generator set utilizes an IVECO engine. Community troubleshooting guides for JCB power products identify common failure patterns in JCB industrial engines (specifically the 444 series) that vary by generation. Early Tier 2 and Tier 3 Dieselmax variants are prone to big end bearing failures on the crankshaft and fuel injection pump faults. Later Tier 4i and T4 Final EcoMax variants tend to suffer from injector faults and general wear due to the sensitivity of common rail fuel systems to fuel quality. Faulty injectors can cause rough running, white smoke, and poor starting.
What are the typical electrical or control panel issues reported for the JCB G144 series?
Operators and technicians report that starting problems are the single most common reason for service calls on JCB engines. For the G144 series, which uses a JCB Digital Control Panel, hard starting is often traced to electrical issues rather than mechanical failure. Key checks include verifying battery voltage (minimum 12.4V for 12V systems or 24.8V for 24V systems) and ensuring the earth strap connection to the block is solid. Corrosion on battery terminals or a failed glow plug relay/timer can prevent the plugs from operating, resulting in hard starting in cold weather.
What fluid specifications and capacities are recommended for the JCB G144 generator set?
The operator’s manual for the JCB G144 generator set covers routine maintenance fluids. JCB recommends using JCB branded fluids that have been verified for use, or equivalent alternatives. Specific recommendations include JCB 15W/40 Multigrade engine oil for temperatures between -15°C to 30°C (5°F to 86°F) and JCB Super Universal Agricultural fluid for broader temperature ranges. The hydraulic system requires ISO 46 hydraulic oil. Coolant must be changed at recommended intervals to prevent silicate separation, which causes brown sludge in the expansion bottle.
How does the JCB G144 handle high-dust environments, and what is the consensus on air filtration?
Operators working in dusty conditions (such as quarries or dry agricultural land) report that standard air filtration can be overwhelmed by fine dust, leading to high oil consumption and heavy breathing. The consensus is to fit a cyclone pre-filter ahead of the standard air filter. This removes heavier dust particles before they reach the filter element, dramatically extending both filter life and engine life. Poor air filtration causes accelerated ring and bore wear, leading to expensive internal engine repairs.
What are the common hydraulic or powertrain behaviors associated with JCB machinery of this era?
While the G144 is a stationary generator, JCB machinery of this era (including backhoe loaders and excavators) exhibits specific hydraulic behaviors. Older JCB models suffer from hydraulic pump problems if fluid intervals are stretched. In mobile JCB equipment, hydraulic performance can degrade when the machine is on a slope (e.g., rear end in a hole) due to oil starvation at the pump inlet. For the G144 generator, the primary hydraulic concern is maintaining the integrity of the high-precision components in the engine-driven fuel pump and cooling fan circuits, which rely on the specified JCB hydraulic oil for lubrication.
What is the typical undercarriage or wear pattern for JCB machines, and how does it apply to the G144?
The JCB G144 is a stationary generator set and does not have an undercarriage. However, for JCB mobile machinery of similar vintage, common wear patterns include deterioration of engine mount rubbers causing excessive vibration, and failure of the turbocharger shaft due to restricted air filtration. For the G144, the equivalent wear pattern is the deterioration of engine mounts and the need for frequent inspection of the turbocharger intake and exhaust hoses for splits or loose clamps, which cause noticeable performance loss.
What should be checked when buying a used JCB G144 generator set?
When inspecting a used JCB G144, verify the engine serial number plate on the block to identify the specific engine variant (IVECO) and its generation. Check for brown sludge in the coolant expansion bottle, which indicates silicate separation and overdue coolant changes. Inspect the turbocharger shaft for excessive play by removing the intake pipe. Verify the condition of the glow plugs and relay for cold-start reliability. Check the fuel system for air leaks on the suction side, which cause the engine to fire briefly then die. Have your dealer verify the specific serial range compatibility for the JCB Digital Control Panel and alternator wiring diagrams.
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 G144(JCB GENERATOR). Related factory variants of the same model family:
G144(JCB GENERATOR)G144(JCB GENERATOR)
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