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Jcb G400
Maintenance schedule, common problems & OEM parts breakdown
The JCB G400 is a diesel power generator set, not a construction earthmoving machine. It is part of the JCB Generator Set family, which includes models G330, G350, G380, G400, G440, and G550. The G400RS variant is a 350KW Tier 4 FINAL power module rated at 320KW Prime and 400KVA at 60Hz, 480V, 1800RPM. It is powered by a Volvo Penta TAD1375VE diesel engine. The unit is trailer-mounted in a sound-attenuated enclosure with a 423-gallon onboard fuel tank and includes a touchscreen digital control panel and SCR exhaust system. It is EPA Tier 4 FINAL compliant and CARB PERP eligible.
The G400 series represents JCB's entry into the high-output diesel power generation market, leveraging Volvo Penta engines for prime power applications. Unlike JCB's construction machinery which uses EcoMAX or Dieselmax engines, the G400RS specifically utilizes the Volvo Penta TAD1375VE. The machine matters in the used market as a rental-grade power solution for construction sites requiring 320-350KW output. It serves as a stationary power source rather than a mobile earthmoving tool, distinguishing it from JCB's excavator, backhoe, or telehandler lineages.
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 G400 specifications
Engine
| Model | JCB EcoMAX TCAE-81 |
| Gross/Net Power | 109 hp |
| Displacement | 4.4 L |
| Cylinders | Not documented for this exact serial range — verify with your dealer |
| Emissions Tier | Tier 4 Final (T4) |
Weights
| Operating Weight | 5,689 kg (12,544 lb) |
| Shipping Weight | Not documented for this exact serial range — verify with your dealer |
| Ground Pressure | 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 |
| Track Width | 17.7 in (450 mm) |
| Ground Clearance | Not documented for this exact serial range — verify with your dealer |
Performance
| Travel Speeds | Not documented for this exact serial range — verify with your dealer |
| Operating Capacity @ 35% | 1,811 kg (3,994 lb) |
| Hinge Pin Height | 10 ft 3 in (0.08 m) |
| Operating Height | 6 ft 10 in (0.25 m) |
| Gradeability | Not documented for this exact serial range — verify with your dealer |
Service capacities (summary)
| Fuel Tank | Not documented for this exact serial range — verify with your dealer |
| Hydraulic System | 24 gpm (90.6 L/min) standard circuit; 42.3 gpm (160.1 L/min) high flow option |
| 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 G400 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the G400 beyond the schedule
Predictive Maintenance & Fluid Analysis
Oil sampling at the 500-hour interval is critical for the G400RS. Take samples from the engine, hydraulic, axle, and final drive systems to establish a baseline. Compare future samples against this baseline to detect developing bearing, seal, or contamination problems 500 to 800 hours before failure. Inspect the hydraulic return filter magnet for metallic debris before disposal. Interpret hydraulic oil samples against the 500-hour baseline to decide whether to extend or compress the next service interval.
Corrective & Common Repairs
The G400RS uses a Volvo Penta TAD1375VE engine. Check turbocharger shaft play, boot condition, and wastegate function on Dieselmax units if applicable to the specific engine variant. Check injector spray pattern via diagnostic tool and replace as required. Service brakes including disc wear and immersed brake condition. Verify SCR exhaust system operation for Tier 4 FINAL compliance.
Overhaul & Rebuild Points
The 2000-hour deep service is the primary overhaul point. Change hydraulic oil with a full drain and tank clean, refilling with JCB-spec oil. Inspect structural components (boom, arm/dipper, loader arm, chassis, side frames) for cracking or unauthorized welding. Measure swing ring play on JS-series excavators if the G400 is mounted on a tracked carrier.
Seasonal & Environment Servicing
Check coolant levels and replace with JCB-spec long-life coolant at the 1000-hour interval. Drain, flush, and refill the cooling system. Inspect hoses and connections for leaks. Check the 423-gallon onboard fuel tank for water or debris. Verify the sound-attenuated enclosure integrity for noise and weather protection. Ensure the SCR exhaust system is clear of debris. Check the battery terminals and electrolyte levels in non-sealed batteries. Test all warning lights, gauges, and safety systems.
G400 common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| SC1471259 | Filter, Fuel | Fuel system service | Check fitment → |
| SC1393641 | Head, Fuel Filter | Fuel system service | Check fitment → |
| SC1393640 | Element, Filter, Fuel Feed | Fuel system service | Check fitment → |
| SC1393639 | Filter, Fuel Feed | Fuel system service | Check fitment → |
| SC1763776 | Element, 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.
G400 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| P0087 | Fuel rail pressure too low | Clogged primary fuel filter, lift pump failure, or air leaks on the suction side. | Replace primary fuel filter; verify lift pump primes at key-on; inspect for air leaks. |
| P0191 | Fuel rail pressure sensor performance | Erratic rail pressure readings due to sensor fault or wiring issues. | Check filter age; test sensor 5V/ground; wiggle-test connector. |
| P0335 | Crankshaft Position Sensor "A" Circuit (No Signal) | Faulty crank sensor or signal circuit interruption. | Inspect crank sensor connector and wiring; verify signal presence. |
| P0697 | Torque Reduction / Limp Home (ECU Internal 5V Supply) | ECU internal 5V supply fault or auxiliary fault triggering protection mode. | Check ECU power/ground; inspect auxiliary circuits; verify with diagnostic tool. |
| P1093 | Common Rail Pressure Fault (Lack of Feed) | Fuel supply restriction or pump feed issue. | Check fuel filter and lift pump prime; inspect for blockages. |
| P1101 | Rail Pressure Control Error (Positive fault) | Fuel pressure control system malfunction. | Inspect inlet metering valve (IMV) and fuel rail components. |
| U0073 | CAN bus off | Module network drop, often due to battery/ground issues before ECU failure. | Load-test battery; clean grounds; inspect harness at pivots. |
| E485 | AdBlue / DEF quality out of range | Contaminated or incorrect concentration DEF fluid. | Confirm 32.5% urea concentration; replace contaminated DEF; check quality sensor. |
| T135 | Transmission oil temperature high | Transmission overheating due to low oil level or cooler blockage. | Check oil level; clean cooler fins; allow cool down before heavy work. |
| ENG OIL | Engine oil pressure low | Low oil level, leak, or sensor failure. | Check oil level immediately; inspect for leaks; test sensor before condemning pump. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
G400 attachments & work tools
Power Generation Modules
The JCB G400RS is a 350kW Tier 4 Final diesel power module powered by a Volvo Penta TAD1375VE engine, rated at 320kW Prime and 400kVA at 60Hz. It includes a touchscreen digital control panel, SCR exhaust system, and a 423-gallon onboard fuel tank in a sound-attenuated trailer-mounted enclosure.
Compact Track Loader Attachments
The JCB 400T Compact Track Loader utilizes a 4.4L EcoMAX engine delivering 109hp and features an industry-standard quick hitch for coupling to JCB and competitor attachments. The standard hydraulic circuit provides 24 GPM, supporting a wide range of buckets, forks, and breakers.
Excavator and Backhoe Attachments
JCB offers an OEM hydraulic breaker range designed for excavators and backhoe loaders, alongside a wide range of specialist shovels and buckets. These tools are engineered for efficient digging, material retention, and clean release, compatible with the machine's hydraulic system.
Skid Steer and Loader Attachments
Compatible work tools include pallet forks, deep profile buckets, ditch maintenance buckets, grading buckets, and heavy-duty jaw buckets. The machine supports quick changeover via a hydraulic or manual quick hitch system to maximize productivity.
Specialist and Lifting Attachments
The range includes lifting equipment with a Q-Fit pick-up for safe suspended load handling, sweepers for cleaning, and tilt rotators enabling 45-degree tilt and 360-degree rotation. These attachments integrate with the machine's hydraulic system to provide multi-directional control.
All G400 assemblies by section
Every catalogued assembly group for the Jcb G400. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Z Jcb Generator Set
Z0-10-1 Generator Set, G440q 400kva, 50hz 400v Prime
Z0-9-1 Generator Set, G440 400kva, 50hz 400v Prime
| 32***47 | Jcb, Generator G440, 400kva | 1 |
Z0-6-1 Generator Set, G380q 350kva, 50hz 400v Prime
| 32***44 | Jcb, Generator G380q, 350kvaq | 1 |
Z0-12-1 Generator Set, G550q 500kva, 50hz 400v Prime
| 32***50 | Jcb, Generator G550q, 500kva | 1 |
Z0-8-1 Generator Set, G400q 360kva, 50hz 400v Prime
| 32***46 | Jcb, Generator G400q, 360kva | 1 |
Z0-5-1 Generator Set, G380 350kva, 50hz 400v Prime
| 32***43 | Jcb, Generator G380, 350kva | 1 |
Z0-2-1 Generator Set, G330q 300kva, 50hz 400v Prime
| 32***40 | Jcb, Generator G330q, 300kva | 1 |
Z0-7-1 Generator Set, G400 360kva, 50hz 400v Prime
| 32***45 | Jcb, Generator G400, 360kva | 1 |
Z0-4-1 Generator Set, G350q 310kva, 50hz 400v Prime
| 32***42 | Jcb, Generator G350q, 310kva | 1 |
Z0-3-1 Generator Set, G350 310kva, 50hz 400v Prime
| 32***41 | Jcb, Generator G350, 310kva | 1 |
Z0-1-1 Generator Set, G330 300kva, 50hz 400v Prime
| 32***39 | Jcb, Generator G330, 300kva | 1 |
Z0-11-1 Generator Set, G550 500kva, 50hz 400v Prime
| 32***49 | Jcb, Generator G550, 500kva | 1 |
Z1-11-1 Engine, Complete, Dc16 Ems
| 32***97 | Engine, Assembly, Dc16 Ems | 1 |
Z1-2-1 Engine, Complete, Dc12 Ems
| 32***95 | Engine, Assembly, Dc12 Ems | 1 |
Z1-3-1 Engine, Complete, Dc12 Ems
| 32***96 | Engine, Assembly, Dc12 Ems | 1 |
Z1-1-1 Engine, Complete, Dc12 Ems
| 32***94 | Engine, Assembly, Dc12 Ems | 1 |
| SC***10 | Tool, Rear Crank Seal | 1 |
Z4-1-1 Gasket Set, Cylinder Head, Dc12
| SC***51 | Gasket, Rocker Cover, Upper | 1 |
| SC***42 | Seal, Fuel Feed | 4 |
| SC***61 | Gasket, Fuel Feed | 1 |
Z4-11-1 Gasket Set, Cylinder Head, Dc16
| SC***83 | Gasket, Manifold, Fuel | 1 |
| SC***61 | Gasket, Fuel Feed | 1 |
| SC***66 | Gasket, Rocker Cover, Upper | 1 |
Z4-2-1 Gasket Set, General Overhaul
| SC***83 | O Ring | 1 |
| SC***11 | O Ring | 2 |
| SC***85 | O Ring | 1 |
Z4-12-1 Gasket Set, General Overhaul, Dc16
| SC***13 | Gasket | 2 |
| SC***83 | O Ring | 1 |
| SC***90 | Seal | 2 |
Z5-11-1 Kit,Piston & Liner
| SC***29 | Pin, Gudgeon | 1 |
| SC***87 | Shim, =0.2mm, Liner | 0 |
| SC***43 | Ring, Retaining | 2 |
Z5-5-1 Kit, Piston, & Liner Dc12
| 33***21 | Liner, Cylinder | 1 |
| 33***22 | O Ring | 1 |
| 33***23 | O Ring | 1 |
Z5-1-1 Service Kit, Outer, Turbocharger
| SC***37 | Gasket | 1 |
| SC***71 | Gasket | 1 |
| SC***85 | Element, Oil Filter | 1 |
Z6-11-1 Fuel Filter, Dc16
| SC***57 | Cover, Fuel Feed | 1 |
| SC***59 | Filter, Fuel | 1 |
| SC***58 | Pipe, Fuel Feed | 1 |
Z6-12-1 Filter, Water Seperator, Dc16
| SC***02 | Bowl, Fuel Feed | 1 |
| SC***41 | Head, Fuel Filter | 1 |
| SC***40 | Element, Filter, Fuel Feed | 1 |
Z6-1-1 Fuel Filter, Dc12
| SC***89 | Head, Filter | 1 |
| SC***04 | Plug | 1 |
| SC***76 | Element, Fuel Filter | 1 |
Z6-14-1 Filter, Oil, Centrifugal, Dc16
| SC***83 | O Ring | 1 |
| SC***35 | Nozzle | 1 |
| SC***85 | O Ring | 1 |
Z6-13-1 Filter, Oil, Dc16
| SC***08 | Filter, Oil, Assembly | 1 |
| SC***54 | O Ring | 1 |
| SC***28 | Tube | 1 |
Z6-3-1 Filter, Oil, Centrifugal, Dc12
| SC***32 | Cover | 2 |
| SC***83 | O Ring | 1 |
| SC***85 | O Ring | 1 |
Z6-2-1 Filter, Oil, Dc12
| 33***08 | Element, Oil Filter | 1 |
| SC***98 | Adapter | 1 |
| SC***58 | Adapter | 1 |
Z6-1-2 Filter, Water Seperator, Dc12
| SC***02 | Bowl, Fuel Feed | 1 |
| SC***41 | Head, Fuel Filter | 1 |
| SC***40 | Element, Filter, Fuel Feed | 1 |
Z8-11-1 Front End Drive, Cooling Fan
| SC***77 | Bearing, Ball | 1 |
| SC***09 | Screw | 1 |
| SC***88 | Fan | 1 |
Z8-13-1 Front End Drive, Accessories, Water Pump/Alternator
| SC***87 | Roller, Fan Belt | 1 |
| SC***65 | Belt, Poly-V | 1 |
| SC***52 | Screw, M12 X 50 | 6 |
Z8-1-1 Front End Drive, Accessories, With Cooling Fan
| SC***88 | Screw, M12 X 35 | 6 |
| SC***95 | Bearing, Ball | 1 |
| SC***12 | Bolt, M14 X 74, Journal C/Shaft | 6 |
Z8-12-1 Front End Drive, Accessories, Cooling Fan, Dc16
| SC***88 | Screw, M12 X 35 | 6 |
| SC***11 | Screw | 6 |
| SC***71 | Hub, Fan Pulley, Driver | 1 |
Z9-2-1 Starter Motor, Dc16
| 33***01 | Motor, Starter | 1 |
| SC***23 | Stud | 3 |
| SC***26 | Plate, Starter Motor | 1 |
Z9-1-1 Starter Motor, Dc12
| SC***26 | Plate, Starter Motor | 1 |
| SC***48 | Relay | 1 |
| SC***11 | Motor, Starter | 1 |
Z10-1-1 Alternator, Dc12
| SC***95 | Bolt, M16 X 90 | 1 |
| SC***66 | Capacitor | 1 |
| SC***53 | Regulator | 1 |
Z10-11-2 Alternator, 100amp, Dc16
| 33***00 | Alternator | 1 |
| SC***92 | Sleeve, Guide | 2 |
| SC***64 | Alternator | 1 |
Z10-11-1 Alternator, Dc16
| SC***92 | Sleeve, Guide | 2 |
| SC***19 | Bracket, Alternator Mounting | 1 |
| SC***16 | Alternator | 1 |
Z11-1-1 Unit, Electronic Control, Dc12
| SC***91 | Cover, Engine Control Unit | 2 |
| SC***22 | Bolt | 8 |
| SC***99 | Housing, Contact 2, Engine Control Unit | 0 |
Z11-2-1 Harnesses & Sensors, Dc12
| SC***21 | Sensor, Pressure, Oil | 1 |
| SC***72 | Cable, Harness | 1 |
| SC***20 | Sensor, Pressure, Charge | 1 |
Z11-13-1 Cable Retainer, Cylinder Head
| 33***02 | Holder, Cable Clamp | 2 |
| 33***03 | Holder, Cable Bushing | 2 |
| SC***91 | Holder, Cable, Clamp | 8 |
Z11-4-1 Protection Plates, & Mounting Bracket, Dc12
| SC***74 | Plate, Protective | 1 |
| SC***63 | Bracket | 1 |
| SC***94 | Plate, Protective | 1 |
Z11-12-1 Harnesses & Sensors, Dc16
| SC***21 | Sensor, Pressure, Oil | 1 |
| SC***20 | Sensor, Pressure, Charge | 1 |
| SC***03 | Sensor, Speed 1 | 1 |
Z11-11-1 Unit, Electronic Control, Dc16
| 33***43 | Housing, Contact Engine Control Unit, 10-Pol | 0 |
| SC***91 | Cover, Engine Control Unit | 2 |
| SC***22 | Bolt | 8 |
Z11-14-1 Protection Plate, & Mounting Bracket, Dc16
| SC***89 | Shield, Heat, Cable Routeing | 1 |
| SC***56 | Holder, Cable, Bushing | 4 |
| SC***30 | Shield, Heat, Rear Of Engine | 1 |
Z11-3-1 Cable Retainers, Cylinder Head, Dc12
| SC***30 | Duct | 1 |
| SC***02 | Screw | 6 |
| SC***69 | Attaching Plate | 1 |
Z12-11-1 Fuel Pipework, High Pressure, Dc16
| SC***90 | Seal | 2 |
| SC***41 | Screw, Banjo | 2 |
| SC***77 | Nut | 1 |
Z12-12-1 Fuel Return Pipes, Dc16
| 33***17 | Valve, Overflow | 1 |
| SC***77 | Nut | 1 |
| SC***65 | Bolt | 1 |
Z12-1-1 Fuel Pipework, High Pressure, Dc12
| SC***90 | Seal | 1 |
| SC***77 | Nut | 1 |
| SC***67 | Banjo | 1 |
Z13-1-1 Fuel Injector, Dc12
| SC***41 | Clamp, Injector | 6 |
| SC***88 | Nozzle, Fuel Injector | 1 |
| SC***64 | O Ring, Injector | 6 |
Z13-11-1 Fuel Injector, Dc16
| SC***64 | O Ring, Injector | 8 |
| SC***73 | Nozzle, Injector, Fuel | 1 |
| SC***39 | Washer, Injector | 8 |
Z15-11-1 Fuel Feed Pump, Dc16
| SC***19 | Screw, M8 X 30 | 2 |
| SC***70 | Pump, Hand, Fuel | 1 |
| SC***55 | Pump, Fuel Lift | 1 |
Z15-1-1 Fuel Feed Pump, Dc12
| SC***11 | O Ring | 1 |
| SC***19 | Screw, M8 X 30 | 2 |
| SC***09 | Screw | 2 |
Z16-11-1 Water Pump, Dc16
| SC***64 | Gasket, Water Pump | 1 |
| SC***21 | Screw, M8 X 40 | 4 |
| SC***25 | Screw, M8 X 60 | 8 |
Z16-1-1 Water Pump, Dc12
| SC***33 | Pump | 1 |
| SC***21 | Screw, M8 X 40 | 2 |
| SC***19 | Screw, M8 X 30 | 7 |
Z17-1-1 Water Inlet, Connector
| SC***18 | Screw | 3 |
| SC***86 | Connector, Water Inlet | 1 |
| SC***16 | Gasket | 1 |
Z17-12-1 Water Bleed Pipe, Dc16
| SC***89 | Pipe, Bleed Assembly. | 1 |
| SC***15 | Hose, Bleed Assembly. | 1 |
| SC***86 | Connector, Bleed Pipe | 8 |
Z17-2-1 Water Bleed Pipe, Dc12
| SC***84 | Bolt | 1 |
| SC***46 | Bolt | 5 |
| SC***52 | Pipe | 1 |
Z18-11-1 Thermostat & Housing, Dc16
| SC***25 | Screw, M8 X 60 | 4 |
| SC***24 | Thermostat, 83 Degrees | 1 |
| SC***25 | Gasket, Thermostat | 1 |
Z18-1-1 Thermostat & Housing, Dc12
| SC***85 | Housing, Thermostat | 1 |
| SC***19 | Screw, M8 X 30 | 10 |
| SC***87 | O Ring | 1 |
Z19-12-1 Breather Tube, Crankcase, Dc12
| SC***92 | Pipe, Crankcase, Ventilation | 1 |
| SC***89 | Screw, M6 X 16 | 3 |
| SC***21 | Screw, M8 X 40 | 4 |
Z19-2-1 Breather Tube, Crankcase, Dc12
| SC***20 | Screw | 1 |
| SC***82 | Pipe, Crankcase Breather | 1 |
| SC***32 | Nut, Flange M8 | 2 |
Z19-11-1 Rocker Cover, Dc16
| SC***90 | Cover | 8 |
| SC***06 | Cap, Oil Filler | 1 |
| SC***66 | Gasket, Rocker Cover, Upper | 8 |
Z19-1-1 Rocker Cover, Dc12
| SC***51 | Gasket, Rocker Cover, Upper | 6 |
| SC***06 | Cap, Oil Filler | 1 |
| SC***19 | Screw, M8 X 30 | 24 |
Z20-11-1 Rocker Shaft, Assembly
| SC***10 | Screw, Adjusting | 1 |
| SC***89 | Arm, Rocker, Injector | 8 |
| SC***92 | Plug, Rivet | 8 |
Z20-1-1 Rocker Shaft, Assembly
| SC***10 | Screw, Adjusting | 1 |
| SC***89 | Arm, Rocker, Injector | 6 |
| SC***92 | Plug, Rivet | 6 |
Z21-11-1 Pushrods & Tappets, Dc16
| SC***79 | Pushrod | 8 |
| SC***07 | Tappet, Roller | 2 |
| SC***46 | Bolt, Screw M10 X 60 | 16 |
Z21-1-1 Pushrods & Tappets, Dc12
| SC***02 | Circlip | 2 |
| SC***51 | Rod, Push | 4 |
| SC***45 | Rod, Push | 2 |
Z22-1-1 Turbocharger, Dc12
| SC***17 | Turbocharger | 1 |
| SC***39 | Turbocharger, Service Exchange | 1 |
Z22-11-1 Turbocharger, Dc16
| SC***94 | Turbocharger | 1 |
Z23-2-1 Turbo Exhaust, Pipework, Dc12
| SC***33 | Pipe, Exhaust Elbow | 1 |
| SC***32 | Nut | 1 |
| SC***37 | Clamp, "V" | 1 |
Z23-12-1 Turbo Exhaust, Pipework
| SC***32 | Nut | 1 |
| SC***74 | Clamp, "V" | 1 |
| SC***01 | Pipe | 1 |
Z23-11-1 Turbo Pipework
| SC***44 | Adapter | 1 |
| SC***71 | Gasket | 1 |
| SC***98 | Adapter | 1 |
Z23-1-1 Turbo Pipework
| SC***71 | Gasket | 1 |
| SC***73 | Clamp | 2 |
| SC***98 | Adapter | 1 |
Z25-1-1 Induction Manifold, Dc12
| SC***18 | Screw | 4 |
| SC***82 | Plug | 1 |
| SC***67 | Banjo | 1 |
Z25-11-1 Induction Manifold
| SC***58 | Pipe, Flange | 2 |
| SC***33 | O Ring, Inlet Manifold | 2 |
| SC***19 | Screw, M8 X 30 | 8 |
Z26-11-1 Exhaust Manifold
| SC***02 | Pipe, Expansion | 1 |
| SC***65 | Spacer | 8 |
| SC***67 | Manifold, Exhaust | 1 |
Z26-1-1 Exhaust Manifold
| SC***40 | Gasket | 1 |
| SC***64 | Spacer | 2 |
| SC***99 | Manifold, Exhaust | 2 |
Z27-1-1 Cylinder Head, Assembly
| SC***02 | Spring, Exhaust Valve, Outer | 12 |
| SC***30 | Valve, Exhaust | 12 |
| SC***22 | Valve, Intake | 12 |
Z27-11-1 Cylinder Head, Assembly
| SC***02 | Spring, Exhaust Valve, Outer | 16 |
| SC***22 | Head | 8 |
| SC***30 | Valve, Exhaust | 16 |
Z29-11-1 Oil Cooler, Dc16
| SC***33 | Cooler, Oil | 1 |
| SC***77 | Cover | 1 |
| SC***13 | Gasket, Cooling System | 1 |
Z29-1-1 Oil Cooler, Dc12
| SC***98 | Gasket | 1 |
| SC***18 | Gasket | 1 |
| SC***54 | Adapter | 1 |
Z30-1-1 Oil Level Dipstick, & Tube, Dc12
| SC***24 | Ferrule | 1 |
| SC***48 | Dipstick | 1 |
| SC***37 | Clip | 1 |
Z30-11-1 Oil Level Dipstick, & Tube, Dc16
| SC***91 | Pipe | 1 |
| SC***47 | Adapter, Union, Straight | 1 |
| SC***26 | Flange Pipe | 1 |
Z31-11-1 Oil Sump, Dc16
| SC***14 | Washer, Sealing | 1 |
| SC***22 | Screw, M8 X 60 | 26 |
| SC***35 | Insert | 1 |
Z31-1-1 Oil Sump, Dc12
| 33***93 | Plate, Cover | 1 |
| SC***14 | Washer, Sealing | 1 |
| SC***22 | Screw, M8 X 60 | 27 |
Z32-11-1 Oil Pump, Dc16
| SC***25 | Screw, M8 X 60 | 4 |
| SC***19 | Screw, M8 X 30 | 19 |
| SC***19 | O Ring | 2 |
Z32-2-1 Oil Pressure Sensor, Dc12
| SC***89 | Adapter | 1 |
| SC***45 | Pipe, Oil Pressure Sensor | 1 |
| SC***89 | Screw, M6 X 16 | 2 |
Z32-1-1 Oil Pump, Dc12
| SC***43 | Pipe | 1 |
| SC***22 | Screw, M8 X 60 | 4 |
| SC***46 | Pipe | 1 |
Z33-11-1 Flywheel Assembly, Dc16
| SC***95 | Bolt, M16 X 90 | 10 |
| SC***13 | Gear, Flywheel Ring | 1 |
Z33-1-1 Flywheel Assembly, Dc12
| SC***95 | Bolt, M16 X 90 | 10 |
| SC***88 | Flywheel, Assembly | 1 |
| SC***13 | Gear, Flywheel Ring | 1 |
Z34-11-1 Flywheel Housing, Dc16
| SC***80 | O Ring | 1 |
| SC***07 | Gasket, Flywheel Housing | 1 |
| SC***83 | Seal, Rear Oil | 1 |
Z34-1-1 Flywheel Housing
| SC***80 | O Ring | 1 |
| SC***51 | Housing, Flywheel | 1 |
| SC***18 | Terminal, Cable, Flat Socket | 2 |
Z35-1-1 Camshaft, & Timing Gears, Dc12
| SC***77 | Bearing, Ball | 2 |
| SC***94 | Gear | 1 |
| SC***21 | Shaft | 2 |
Z35-11-1 Camshaft, & Timing Gears, Dc16
| SC***66 | Gear | 1 |
| SC***77 | Bearing, Ball | 1 |
| SC***94 | Gear | 1 |
Z36-11-1 Timing Case & Covers, Dc16
| SC***64 | Spring | 1 |
| SC***18 | Gasket | 2 |
| SC***10 | Stud, M10 X 50 | 2 |
Z36-12-1 Casing, Vibration Insulator, Dc16
| SC***60 | Gasket | 1 |
| SC***40 | Cover | 1 |
| SC***87 | O Ring | 1 |
Z36-1-1 Timing Case & Covers, Dc12
| SC***67 | Plug | 1 |
| SC***37 | Cover | 1 |
| SC***25 | Screw, M8 X 60 | 2 |
Z37-11-1 Piston & Con-Rod, Assemblies, Dc16
| SC***29 | Pin, Gudgeon | 1 |
| SC***59 | Bush, Small End | 1 |
| SC***53 | Rod, Connecting | 8 |
Z37-1-1 Piston & Con-Rod, Assemblies, Dc12
| SC***29 | Pin, Gudgeon | 1 |
| SC***59 | Bush, Small End | 1 |
| SC***67 | Bolt, Con-Rod, M12 X 72 | 2 |
Z38-1-1 Crankshaft Assembly, Dc12
| SC***84 | Ring, Sealing | 1 |
| SC***84 | Crankshaft, Assembly | 1 |
| SC***04 | Gear, Crankshaft | 1 |
Z38-11-1 Crankshaft Assembly, Dc16
| SC***16 | Crankshaft | 1 |
| SC***89 | Screw | 12 |
| SC***04 | Gear, Crankshaft | 1 |
Z39-11-1 Cylinder Block, Assembly, Dc16
| SC***93 | O Ring | 1 |
| SC***18 | Cover | 1 |
| SC***17 | Plate | 1 |
Z39-1-1 Cylinder Block, Assembly, Dc12
| SC***08 | Tap, Drain | 1 |
| SC***18 | Terminal, Cable, Flat Socket | 2 |
| SC***89 | Screw, M6 X 16 | 1 |
Z43-11-1 Air Filter, Installation, Dc16
| 32***64 | Clip, Overcentre | 5 |
| 32***98 | Cover, Filter End | 1 |
| 32***99 | O Ring | 1 |
Z43-1-1 Air Filter, Installation, Dc12
| 32***05 | Valve, Dump | 1 |
| 32***00 | Indicator, Restriction | 1 |
| 32***64 | Clip, Overcentre | 2 |
Z44-11-1 Air Induction Hoses
| SC***32 | Sensor | 1 |
| SC***69 | Hose | 1 |
| SC***86 | Clamp, Hose | 2 |
Z45-12-1 Exhaust System, Canopy Build
| 32***23 | Cap, Rain | 1 |
| 32***66 | Clamp _u_ | 3 |
| 32***99 | Silencer, Exhaust Reactive | 1 |
Z45-1-1 Exhaust Silencer, Open Build
| 32***00 | Silencer, Exhaust | 1 |
| 32***23 | Cap, Rain | 1 |
| 32***96 | Pipe, Exhaust Stub | 1 |
Z45-11-1 Exhaust System, Canopy Build
| 32***23 | Cap, Rain | 1 |
| 32***25 | Silencer | 1 |
| 32***66 | Clamp _u_ | 3 |
Z46-11-1 Fan Guards, Dc16
| 33***08 | Bracket | 1 |
| 33***09 | Washer | 19 |
| SC***63 | Washer | 2 |
Z46-1-1 Drive Belt Guard, Dc12
| 33***06 | Guard, Drive Belt, Upper | 1 |
| 33***07 | Washer | 2 |
| SC***05 | Bracket | 3 |
Z47-1-1 Cooler Assembly, Dc12
| 13***3D | Setscrew | 0 |
| 13***3D | Nut, M6 Lock | 0 |
| 30***68 | Radiator, Assembly | 1 |
Z47-11-1 Cooler Assembly, Dc16
| SC***45 | Tank, Expansion | 1 |
| SC***68 | Cap, Coolant Pressure | 1 |
| SC***67 | Sensor | 1 |
Z48-11-1 Radiator, Hose & Pipework, Dc16
| SC***65 | Gasket | 1 |
| SC***82 | Pipe | 1 |
| SC***92 | Gasket | 1 |
Z48-1-1 Radiator/Cooler, Hose & Pipework, Dc12
| 30***79 | Clip | 10 |
| 30***80 | Gasket, Flange | 1 |
| 30***81 | Plate, Clamping | 1 |
Z48-12-1 Charge Air Cooler, Hose & Pipework, Dc12
| SC***91 | Hose | 3 |
| SC***18 | Screw | 2 |
| SC***24 | Clamp, 'V' | 1 |
Z49-1-1 Cooling Fan & Spacer
Z50-1-1 Fuel Pipes, Fuel Tank To Filter
| 13***0D | Setscrew, M10 X 40mm | 4 |
| 13***3D | Nut, Self Lock M10 | 4 |
| 14***8D | Washer, M10 | 4 |
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***21 | Seal, Bonded 3/4" Bsp | 1 |
| 22***03 | Clip, Jubilee | 2 |
| 32***71 | Adapter, 1/2"Bsp M 1/2"Tail | 2 |
Z60-5-1 Lifting Bracket, (Optional)
| 13***6D | Bolt, M20 X 70mm | 8 |
| 13***3D | Nut, M20, 2.5 Pitch; San 10***25 | 8 |
| 14***2D | Washer, Plain | 16 |
Z60-11-1 Fuel Tank
| 32***18 | Cap, Fuel Tank | 1 |
| 32***65 | Gauge Fuel | 1 |
| 32***77 | Plug, 1.5"Bsp | 2 |
Z60-2-1 Base & Fittings
| 13***8D | Setscrew, M10 X 30 | 0 |
| 13***8D | Setscrew, M16 X 30mm | 8 |
| 13***3D | Nut, Self Lock M10 | 0 |
Z60-1-1 Base & Fittings
| 13***8D | Setscrew, M10 X 30 | 0 |
| 13***8D | Setscrew, M16 X 30mm | 8 |
| 13***3D | Nut, Self Lock M10 | 0 |
Z61-2-1 Canopy, Middle Section
| 13***5D | Setscrew, M8x20 | 78 |
| 14***7D | Washer, M8 Plain | 78 |
| 14***7D | Washer, M8 Spring | 78 |
Z61-4-1 Canopy, Rear Section
| 13***5D | Setscrew, M8x20 | 20 |
| 14***7D | Washer, M8 Plain | 20 |
| 14***7D | Washer, M8 Spring | 20 |
Z61-21-1 Canopy Soundproofing
| 32***16 | Kit-Panel, Foam Backed, Centre Section | 1 |
| 32***17 | Kit-Panel, Sound Proofing, Centre Section | 1 |
| 32***18 | Kit-Panel, Foam Backed, Front Section | 1 |
Z61-1-1 Canopy Assembly
| 32***84 | Canopy, Assembly | 1 |
| 32***85 | Canopy, Middle Section | 1 |
| 32***86 | Canopy, Front Section | 1 |
Z61-3-1 Canopy, Front Section
| 13***5D | Setscrew, M8x20 | 28 |
| 13***7D | Setscrew, M10 X 25mm Long | 2 |
| 13***3D | Nut, Self Lock M10 | 2 |
Z62-4-1 Alternator, Hci544d
| 32***22 | Kit-Rectifier | 1 |
| 32***23 | Regulator, As440; Sa465 See Bulletin | 1 |
| 32***24 | Bearing | 1 |
Z62-11-1 Alternator, Accessories
| 13***8D | Bolt, M6 X 30 | 6 |
| 13***5D | Bolt, M10x35 | 8 |
| 13***3D | Nut, Self Lock M10 | 8 |
Z62-2-1 Alternator, Hci444e
| 32***19 | Alternator | 1 |
| 32***22 | Kit-Rectifier | 1 |
| 32***23 | Regulator, As440; Sa465 See Bulletin | 1 |
Z62-1-1 Alternator, Hci444d
| 32***02 | Alternator | 1 |
| 32***22 | Kit-Rectifier | 1 |
| 32***23 | Regulator, As440; Sa465 See Bulletin | 1 |
Z62-3-1 Alternator, Hci444f
| 32***21 | Alternator, Assembly | 1 |
| 32***22 | Kit-Rectifier | 1 |
| 32***23 | Regulator, As440; Sa465 See Bulletin | 1 |
Z63-1-1 Control Box & Panel, Assemblies
| 13***1D | Screw, Set M6x12 | 2 |
| 13***5D | Setscrew, M8x20 | 8 |
| 14***6D | Washer, M6 Plain | 2 |
Z64-11-1 Circuit Breaker Box, Assembly
| 32***22 | Harness, Power | 1 |
| 32***70 | Harness, Power | 1 |
Z64-1-1 Circuit Breaker Box, Assembly
| 13***8D | Bolt, M6 X 30 | 12 |
| 13***5D | Setscrew, M8x20 | 10 |
| 13***7D | Setscrew, M8x25 | 2 |
Z65-1-1 Engine Electrics
| 13***8D | Bolt, M10 X 30mm Lg | 2 |
| 14***8D | Washer, M10 | 2 |
| 14***8D | Washer, Spring, M10 | 2 |
Z65-11-1 Battery Installation
| 13***5D | Setscrew, M8x20 | 2 |
| 13***5D | Setscrew, M10 X 20 | 4 |
| 13***3D | Nut, Self Lock M8 | 1 |
Frequently asked questions
What engine does the JCB G400RS use?
The JCB G400RS is powered by a Volvo Penta TAD1375VE diesel engine.
What is the operating weight of the JCB G400RS?
The operating weight is not specified in the provided sources.
What model replaced the JCB G400?
The provided sources do not specify a successor model to the JCB G400.
What G400 owners discuss
What powertrain and hydraulic behaviors are typical for the JCB G400 power module?
The JCB G400RS power module is powered by a Volvo Penta TAD1375VE diesel engine, delivering 320 kW prime power and 400 kVA at 60 Hz and 1800 RPM. The system includes an SCR exhaust system and a 423-gallon onboard fuel tank. The unit is trailer-mounted in a sound-attenuated enclosure and is EPA Tier 4 Final compliant.
What are the known engine quirks for the JCB G400 power module?
The G400RS power module utilizes a Volvo Penta TAD1375VE engine. No specific engine quirks, failure modes, or maintenance intervals are documented for this exact serial range in the available sources.
What undercarriage or wear patterns are typical for the JCB G400 machine?
The JCB G400RS is a trailer-mounted power module. The sources do not document undercarriage wear patterns for this specific configuration. The JCB 400T compact track loader, a different machine type, uses a closed-cab undercarriage with 12,544 lb operating weight. Verify undercarriage specifics with your dealer.
What are the common electrical or sensor issues for the JCB G400 power module?
The JCB G400RS power module includes a touchscreen digital control panel. No specific electrical or sensor failure modes are documented for this exact serial range in the available sources.
What should be checked when buying a used JCB G400RS power module?
Check meter hours (e.g., approximately 5051 hours on one pre-owned unit). Verify the condition of the SCR exhaust system and the 423-gallon fuel tank. Inspect the sound-attenuated enclosure for integrity. Confirm touchscreen digital control panel functionality.
What are the known powertrain behaviors for the JCB 400T compact track loader?
The JCB 400T compact track loader is powered by a 4.4L JCB EcoMAX TCAE-81 engine delivering 109 hp. It has a standard hydraulic circuit of 24 GPM (with 42.3 GPM high-flow option). The machine has an operating weight of 12,544 lb and an operating capacity of 3,994 lbs at 35% tipping load. The engine requires no DEF or DPF.
What are the common electrical or sensor issues for the JCB 400T compact track loader?
The JCB 400T compact track loader features a new touch screen display mounted in the top right-hand side of the cab for changing settings. No specific electrical or sensor failure modes are documented for this exact serial range in the available sources.
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 G400. Related factory variants of the same model family:
G400G400
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