JCBgenjcb dressed dieselmax engines
Jcb 320/50100(IPU ASSEMBLEY)
Maintenance schedule, common problems & OEM parts breakdown
The JCB 320/50100 (IPU ASSEMBLEY) is a powertrain component designation for the JCB Dieselmax Turbo Engine, specifically the 97kW 12V variant. This engine is integrated into JCB compact track loaders, notably the 320T series, which was manufactured from 2011 to 2017. The 320T is a mid-size compact track loader with an operating weight ranging from 4,960 kg to 5,248 kg depending on the model year and configuration. The 320T succeeded earlier skid steer and compact track loader models in JCB's lineup and was later replaced by the 325T. Configurations offered included vertical lift and medium reach designs, with the 320T featuring a unique single boom and side-entry cab design.
Across the 320T's production life, the machine evolved from the 2011-2012 models with a 4.96-ton weight to the 2013-2017 models with a 5.25-ton weight and increased lift capacity. The 320/50100 IPU assembly represents the electronic control and integration unit for the Dieselmax engine, which lacks DEF or DPF systems, allowing for extended 500-hour oil intervals. This machine matters in the used and parts market because its Dieselmax engine and IPU assembly are critical, high-value components. The 320T's popularity stems from its durability and efficiency, making the 320/50100 IPU assembly a sought-after replacement part for fleet maintenance and repair.
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 320/50100(IPU ASSEMBLEY) specifications
Engine
| Model | EcoMAX TCAE-55 |
| Gross Power | 55.18 kW (74 hp) |
| Net Power | 68.6 kW (92 hp) |
| Displacement | 4,399.94 cm³ |
| Cylinders | Not documented for this exact serial range — verify with your dealer |
| Emissions Tier | EPA-Tier 4 Final / EU Stage IIIA |
Weights
| Operating Weight | 5,248 kg (11,570 lb) |
| Shipping Weight | Not documented for this exact serial range — verify with your dealer |
| Ground Pressure | 0.34 bar (4.9 psi) |
Dimensions
| Transport Length | 3.81 m (12 ft 6 in) |
| Transport Width | 1.92 m (6 ft 4 in) |
| Transport Height | 2.1 m (6 ft 11 in) |
| Track Gauge | Not documented for this exact serial range — verify with your dealer |
| Ground Clearance | 0.23 m (9 in) |
Performance
| Travel Speed | 9.17 km/h (5.7 mph) |
| Lifting Capacity | 5,248 kg (11,570 lb) |
| Breakout Force | 2,968 kg (6,543 lbf) |
| Gradeability | Not documented for this exact serial range — verify with your dealer |
Service capacities (summary)
| Fuel Tank | 103.33 L (27.3 gal) |
| Hydraulic System | 55.26 L (14.6 gal) |
| Engine Oil | 15.14 L (4.0 gal) |
| Cooling System | 22.33 L (5.9 gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Jcb 320/50100(IPU ASSEMBLEY) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 100 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the 320/50100(IPU ASSEMBLEY) beyond the schedule
Predictive Maintenance & Fluid Analysis
Baseline fluid analysis at the 500-hour interval is critical for the JCB 320/50100 (IPU ASSEMBLEY) equipped Dieselmax engine. Sample engine oil, hydraulic fluid, axle oil, and final drive oil to establish wear patterns. The IPU assembly monitors rail pressure and injector status; compare lab results against this baseline to detect developing bearing or seal issues 500 to 800 hours before failure. Regular oil sampling prevents catastrophic engine damage and optimizes the extended 500-hour oil change interval, ensuring the 97kW engine operates within spec.
Corrective & Common Repairs
Common repairs for the 320/50100 IPU assembly involve addressing fuel system contamination and electrical faults. Replace primary and secondary fuel filters at 500 hours to protect common-rail injectors from dirt, a primary cause of failure. Diagnose EMS electrical fault messages via JCB ServiceMaster for open circuits, short circuits, or CAN communication errors. Inspect the turbocharger boot and wastegate function on the Dieselmax engine to correct overboost or underboost conditions. Addressing these issues promptly prevents engine derating and ensures reliable power delivery.
Overhaul & Rebuild Points
The 2000-hour deep service marks the primary overhaul point for the JCB 320/50100 (IPU ASSEMBLEY) platform. Drain and clean the hydraulic tank, then refill with JCB-spec hydraulic oil to prevent component wear. Inspect structural components like the boom, arm, and chassis for cracking or unauthorized welding. Measure swing ring play on JS-series excavators equipped with this engine. Check injector spray patterns and replace worn injectors. This interval reveals if neglected earlier services have caused cumulative damage, determining if the machine requires major powertrain or structural rebuild.
Seasonal & Environment Servicing
The 320/50100 IPU assembly and Dieselmax engine require specific attention for tropical and cold environments. The IPU engines feature full tropical-rated aluminum cooling packages; inspect the charge air cooler and radiator for debris in dusty conditions. In cold weather, verify coolant mixture freeze protection and check battery electrolyte levels. Ensure the heavy-duty air cleaner with integrated pre-cleaner is clean to prevent intake restriction. Proper seasonal servicing maintains the 97kW engine's peak torque and prevents overheating or starting failures in extreme temperatures.
320/50100(IPU ASSEMBLEY) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 320/20407 | Filter, Fuel System | Fuel system service | Check fitment → |
| 332/D6723 | Filter, & Fuel Lift Pump, Assembly | Fuel system service | Check fitment → |
| 320/04114 | Retainer, Fuel Filter | Fuel system service | Check fitment → |
| 320/07138 | Filter, Fuel Cartridge | Fuel system service | Check fitment → |
| 320/20209 | Filter, Fuel | Fuel system service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
320/50100(IPU ASSEMBLEY) attachments & work tools
Compact Track Loaders
The JCB 320T is a mid-size compact track loader with a 5,248 kg operating weight and a 1,451 kg rated operating capacity. It is powered by a 68.6 kW JCB Dieselmax engine and features a vertical lift arm design with a 1,900 mm bucket width and 0.43 m³ bucket capacity.
Skid Steer Loaders
The JCB 320T skid steer variant (2011–2017) has a transport length of 3.78–3.80 m and a maximum discharge height of 2.28–2.39 m. Bucket widths range from 1,900 mm to 2,130 mm depending on the specific model year and configuration.
IPU Engine Powertrain
The 320/50100 (IPU ASSEMBLEY) is a 97 kW, 12V Turbocharged Aftercooled Engine unit. IPU engines feature full tropical rated aluminium cooling packages, heavy duty mounting feet, and high-quality electrical engine harnesses with peak torque up to 690 Nm.
Hydraulic System Capacities
Total hydraulic system capacity varies by equipment configuration and must be filled with all rams closed while monitoring the level sight glass. Coolant mixture requirements specify 55% antifreeze for freeze protection down to -36° C (-33 °F).
Fluid Specifications
Recommended engine oil is JCB 15W/40 Multigrade suitable for temperatures from -10° C to 50° C (14° F to 122° F). Transmission fluid specifications include JCB Synchoro Shuttle3DX or 3D Super for specific model variants.
All 320/50100(IPU ASSEMBLEY) assemblies by section
Every catalogued assembly group for the Jcb 320/50100(IPU ASSEMBLEY). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
V Jcb Dieselmax Engine, Tier 3
V1-4-1 Engine, Complete, 320/40118
| 32***18 | Engine, Assembly 108kw - 12v, Tca Hdpto 11.5" F/W | 1 |
V1-1-3 Engine, Assembly, Tca Cr Tier3 97kw 130bhp 12v
| 32***98 | Engine, Assermbly Tca Cr Tier3 97kw 130bhp 12v | 1 |
V1-1-4 Engine, Assembly, Tca Cr Tier3 108kw 145bhp 12v
| 32***04 | Engine, Assembly Tca Cr Tier3 108kw 145bhp 12v | 1 |
V1-1-1 Engine, Complete, 320/40107
| 32***07 | Engine, Assembly 97kw 12v, Tca, Hdpto W300 T/C | 1 |
V1-82-1 Engine, Assembly
| 13***7Z | Bolt | 4 |
| 13***1Z | Nut | 4 |
| 14***9Z | Washer | 8 |
V1-81-1 Ipu Assembly
| 13***7Z | Bolt | 4 |
| 13***1Z | Nut | 4 |
| 14***9Z | Washer | 8 |
V1-51-1 Engine, Assembly, 320/50110 Tca 97kw-12v
| 32***36 | Gasket, Turbo Outlet | 1 |
| 32***60 | G.A, Power Take-Off Blanking Plate, Sae | 1 |
| 32***61 | Plate, Blanking | 1 |
V1-52-1 Engine, Assembly, 320/50111 Tca 108kw-12v
| 32***36 | Gasket, Turbo Outlet | 1 |
| 32***60 | G.A, Power Take-Off Blanking Plate, Sae | 1 |
| 32***61 | Plate, Blanking | 1 |
V1-1-5 Engine, Assembly, Tca Cr Tier3 108kw 145bhp 12v
| 32***05 | Engine, Assembly Tca Cr Tier3 108kw 145bhp 12v | 1 |
V1-53-1 Engine, Assembly, 320/50112 Tca 120kw-12v
| 32***36 | Gasket, Turbo Outlet | 1 |
| 32***60 | G.A, Power Take-Off Blanking Plate, Sae | 1 |
| 32***61 | Plate, Blanking | 1 |
V1-1-6 Engine, Assembly, Tca Cr Tier 3 120kw 160 Bhp 12v
| 32***06 | Engine, Assembly Tca Cr Tier 3 120kw 160bhp 12v | 1 |
V1-3-1 Engine, Complete, 320/40117
| 32***17 | Engine, Assembly 108kw - 12v, Tca Hdpto W300 T/C | 1 |
V1-2-1 Engine, Complete, 320/40110
| 32***10 | Engine, Assembly 97kw 12v, Tca,Hdpto,11.5" F/W | 1 |
V1-5-1 Engine, Complete, 320/40119
| 32***19 | Engine, Assembly 120kw - 12v, Tca Hdpto 11.5" F/W | 1 |
V1-50-1 Engine, Complete, 320/50028 Tca 97kw-12v
| 32***36 | Gasket, Turbo Outlet | 1 |
| 32***60 | G.A, Power Take-Off Blanking Plate, Sae | 1 |
| 32***61 | Plate, Blanking | 1 |
V1-1-2 Engine, Assembly, Tca Cr Tier3 97kw 130bhp 12v
| 32***97 | Engine, Assembly Tca Cr Tier3 97kw 130bhp 12v | 1 |
V1-83-1 Ipu Assembly
| 13***7Z | Bolt | 4 |
| 13***1Z | Nut | 4 |
| 14***9Z | Washer | 8 |
V2-3-1 Sealing Caps & Plugs
| 83***21 | Plug, Blanking | 5 |
| 83***22 | Cap, Protective | 15 |
| 83***42 | Plug, Square | 12 |
V2-1-2 Usb Data Link, Adaptor Kit
| 71***65 | Case, Dla | 1 |
| 71***35 | Pc Usb Cable | 1 |
| 71***36 | Lead, Pc Serial 9 Pin | 1 |
V2-1-1 Service Tools
| 32***20 | Bracket, Engine Lifting | 1 |
| 32***21 | Bracket, Engine Lifting | 1 |
| 89***46 | Tool, Fitting, Core Plug | 1 |
V2-2-1 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 |
V3-1-1 Lubricants Primers, & Sealants
| 32***28 | Sealant, 620 | 0 |
| 32***29 | Lubricant, O Ring, P80 | 0 |
| 32***30 | Sealant, 5900 | 0 |
V4-4-1 Seal Kit, Oil Pan
| 32***50 | O Ring | 1 |
| 32***19 | Kit-Oil Pan | 1 |
V4-3-1 Gasket Set, Bottom Overhaul
| 32***30 | Sealant, 5900 | 1 |
| 32***31 | Sealant, 518 | 0 |
| 32***72 | O Ring | 1 |
V4-1-1 Seal Kit, Rocker Cover
| 32***92 | O Ring, Oil Filler Cap | 1 |
| 32***87 | Cap, Fuel Injector | 4 |
| 32***88 | Cap, Fuel Pipe | 8 |
V4-2-1 Gasket Set, Top Overhaul
| 32***51 | O Ring | 1 |
| 32***52 | Gasket, Drain Pipe To Turbo | 1 |
| 32***08 | Gasket, Cylinder Head | 1 |
V5-5-1 Kit-Engine Overhaul, Standard, Tc
| 32***40 | Bolt, Con-Rod, M8 X 57 | 8 |
| 32***97 | Kit-Top Gasket, Turbo Engine Cr | 1 |
| 32***98 | Kit-Bottom Gasket, Turbo Engine Cr | 1 |
V6-2-1 Oil Filter
| 32***33 | Filter, Engine Oil | 1 |
| 32***03 | Filter, Cooler, Oil | 1 |
V6-3-1 Ccv Filter
| 32***62 | Bracket, Air Filter Mounting | 1 |
| 32***66 | Clip | 1 |
| 32***67 | Adapter | 1 |
V6-1-3 Fuel Filter, Bracket Assembly
| 13***3Z | Screw, M8 X 16 | 1 |
| 13***7Z | Bolt, M8 X 25, Flange Reduced Hex | 3 |
| 21***17 | Pin, Tension | 1 |
V6-1-1 Fuel Filter, Secondary, And Bracket Assembly
| 13***3Z | Screw, M8 X 16 | 3 |
| 32***38 | Filter, Fuel Cartridge | 1 |
| 32***00 | Bracket, Fuel Filter | 1 |
V6-1-2 Fuel Filter, Bracket Assembly
| 13***3Z | Screw, M8 X 16 | 1 |
| 13***7Z | Bolt, M8 X 25, Flange Reduced Hex | 2 |
| 13***9Z | Bolt, M8 X 35, Flange Reduced Hex | 1 |
V8-2-1 Auto-Tensioner, Drive Belt
| 13***8Z | Screw, Star Drive, M8 X 30 | 3 |
| 32***84 | Adjuster, Auto-Tension | 1 |
| 32***46 | Adjuster, Autotensioner | 1 |
V8-8-2 Front End Drive, Accessory, With Cooling Fan
| 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 |
V8-1-1 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 |
V8-3-1 Lower Idler Pulley
| 13***9Z | Screw, Star Drive, M8 X 35 | 2 |
| 13***1Z | Screw, Star Drive, M8 X 45 | 1 |
| 32***86 | Pulley, Lower Idler, Assembly | 1 |
V8-10-4 Front End Drive, Accessory, With Cooling Fan
| 32***00 | Hub, Fan Drive, Assembly | 1 |
| 32***30 | Pulley, Idler, Long | 1 |
| 32***41 | Screw, Pan Head, M8 X 20 | 4 |
V8-12-4 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 |
V8-3-2 Lower Idler Pulley
| 13***5Z | Bolt, Flange Head, M8 X 65 | 3 |
| 22***62 | Circlip, Internal | 1 |
| 32***22 | Pulley, Idler, D=124mm | 1 |
V9-3-1 Starter Motor
| 13***8Z | Screw, Star Drive, M10 X 30 | 3 |
| 32***44 | Motor, Starter 12v 4. | 1 |
| 32***52 | Motor, Starter | 1 |
V9-1-1 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 |
V10-3-1 Alternator, 14volt - 95amp
| 13***8Z | Screw, Star Drive, M10 X 30 | 1 |
| 13***2Z | Bolt, Star Drive, M10 X 120 | 1 |
| 32***10 | Alternator, 14v-95amp | 1 |
V11-21-1 Engine Harness
| 32***13 | Main Harness, Tier 3 | 1 |
| 32***18 | Harness, Engine | 1 |
V11-2-1 Unit, Electronic Control, 108kw 12volt
| 13***1Z | Bolt, M8 X 45, Flange Reduced Hex | 4 |
| 32***0R | Unit, Engine Control Unit - 108kw | 1 |
| 32***43 | Unit, Engine Control Unit - 108kw - Cr | 1 |
V11-3-1 Unit, Electronic Control, 120kw 12volt
| 13***1Z | Bolt, M8 X 45, Flange Reduced Hex | 4 |
| 32***1R | Unit, Engine Control Unit - 120kw | 1 |
| 32***44 | Unit, Engine Control Unit - 120kw - Cr | 1 |
V11-1-1 Unit, Electronic Control, 97kw 12volt
| 13***1Z | Bolt, M8 X 45, Flange Reduced Hex | 4 |
| 32***9R | Unit, Engine Control Unit - 97kw | 1 |
| 32***17 | Unit, Engine Control Unit - 97kw - Cr | 1 |
V11-11-1 Switches & Sensors, 12volt
| 13***8Z | Bolt, M8 X 30, Flange Reduced Hex | 2 |
| 32***46 | Switch, Oil Pressure | 1 |
| 32***55 | Sensor, Temperature | 1 |
V12-11-1 Fuel Pipework, Low Pressure
| 13***3Z | Screw, M8 X 16 | 1 |
| 32***33 | Ring, Snap | 4 |
| 32***34 | O Ring | 4 |
V12-1-1 Fuel Pipework, High Pressure, Tc
| 13***3Z | Screw, M8 X 16 | 1 |
| 32***32 | Grommet, Split | 1 |
| 32***76 | Pipe, Fuel Injector No.1 | 1 |
V13-1-1 Fuel Injector, Tc
| 32***93 | Bolt, Injector Clamp | 4 |
| 32***39 | Clamp, Fuel Injector | 4 |
| 32***24 | Seal, Injector | 1 |
V14-1-1 Fuel Rail
| 32***24 | Rail, Fuel | 1 |
| 32***25 | Setscrew, M7x25, 6 Lobed | 2 |
| 32***88 | Washer, Copper | 1 |
V15-1-1 Fuel Pump
| 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 |
V16-1-1 Water Pump
| 32***10 | Gasket, Water Pump | 1 |
| 32***14 | Screw, Pan Head, M8 X 25 | 4 |
| 32***42 | Pump, Water, Assembly | 1 |
V17-2-1 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 |
V17-1-1 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 |
V18-1-1 Thermostat & Housing
| 13***5Z | Screw, Star Drive, M8 X 20 | 3 |
| 32***40 | Housing, Thermostat | 1 |
| 32***43 | Seal, C | 1 |
V19-1-1 Rocker Cover
| 32***40 | O Ring | 1 |
| 32***90 | Cap, Oil Filler, Assembly | 1 |
| 32***92 | O Ring, Oil Filler Cap | 1 |
V19-11-1 Cover, Injector Seal
| 32***28 | Cover, Injector Seal Cr | 1 |
| 32***29 | Insert, Injector Seal Cover, Cr | 4 |
| 32***16 | G.A, Cover-Inj Seal Cr | 1 |
V19-2-1 Rocker Cover
| 32***68 | Plug, Parallel Core | 1 |
| 32***40 | O Ring | 1 |
| 32***90 | Cap, Oil Filler, Assembly | 1 |
V19-21-1 Ccv Filter, Installation
| 13***3Z | Screw, M8 X 16 | 1 |
| 32***21 | Seal, Bonded | 1 |
| 32***77 | Filter, Ccv, Assembly | 1 |
V20-1-1 Rocker Shaft, Assembly
| 13***2Z | Bolt, M8 X 50 | 7 |
| 13***5Z | Bolt, Flange Head, M8 X 65 | 1 |
| 32***11 | Adjuster, Valve Lash | 8 |
V21-1-1 Pushrods & Tappets
| 32***24 | Tappet, Valve | 8 |
| 32***77 | Rod, Push | 8 |
| 32***92 | Camshaft, Pushrods And Tappets | 1 |
V22-2-1 Turbocharger, Tc, Horizontally Swept
| 32***07 | Stud, M8 X 75 | 4 |
| 32***08 | Nut, Lock, M8 Special | 4 |
| 32***53 | Gasket, Single, Tc To Manifold | 1 |
V22-1-1 Turbocharger, Tc, Down Swept
| 32***07 | Stud, M8 X 75 | 4 |
| 32***08 | Nut, Lock, M8 Special | 4 |
| 32***53 | Gasket, Single, Tc To Manifold | 1 |
V23-2-1 Turbo Pipework
| 13***3Z | Bolt, M6 X 16, Flange Reduced Hex | 2 |
| 13***5Z | Bolt, Flange Head, M8 X 20 Lg | 2 |
| 32***51 | O Ring | 2 |
V23-1-1 Turbo Pipework
| 13***3Z | Bolt, M6 X 16, Flange Reduced Hex | 2 |
| 13***5Z | Bolt, Flange Head, M8 X 20 Lg | 2 |
| 32***49 | Clip, Pipe | 1 |
V25-1-1 Induction Manifold
| 13***7Z | Bolt, M8 X 25, Flange Reduced Hex | 10 |
| 32***11 | Plate, Blanking, Intake Heater | 1 |
| 32***50 | Gasket, Inlet Manifold | 1 |
V26-1-1 Exhaust Manifold
| 32***00 | Manifold, Exhaust | 1 |
| 32***35 | Gasket, Heatshield | 1 |
| 32***45 | Bolt, M10 X 57 | 8 |
V27-1-1 Cylinder Head, Assembly, Tc
| 14***15 | Washer, Seal; Replaces Khj0891 | 2 |
| 32***03 | Plug, Core, D=40mm | 2 |
| 32***12 | Sealant, Omnifit 100m; Health & Safety Warning. Refer To The Service Workshop Manual, Sealant, Omnifit 100m; Health & Safety Warning. Refer To The Service Workshop Manual., Sealant, Omnifit 100m, Sealant, Omnifit 100m; Health And Safety Warning. Refer To The Service Workshop Manual For Details | 0 |
V28-2-1 Bracket, Engine Lifting
| 13***8Z | Bolt, M10 X 30, Flange Reduced Hex | 1 |
| 32***19 | Bracket, Engine Lifting | 1 |
| 32***20 | Bracket, Engine Lifting | 1 |
V28-1-1 Brackets, Engine Lifting
| 13***8Z | Screw, Star Drive, M10 X 30 | 4 |
| 32***20 | Bracket, Engine Lifting | 1 |
| 32***21 | Bracket, Engine Lifting | 1 |
V29-1-1 Oil Cooler
| 13***5Z | Bolt, Flange Head, M8 X 20 Lg | 4 |
| 13***7Z | Bolt, M8 X 25, Flange Reduced Hex | 10 |
| 32***05 | Plug, Core, D=16mm | 2 |
V30-1-1 Oil Level Dipstick, & Tube, Short
| 13***3Z | Screw, M8 X 16 | 1 |
| 32***27 | O Ring | 2 |
| 32***29 | O Ring | 2 |
V30-2-1 Oil Level Dipstick, & Tube, Long
| 13***3Z | Screw, M8 X 16 | 1 |
| 32***27 | O Ring | 2 |
| 32***29 | O Ring | 2 |
V31-2-1 Sump, Oil, Drain
| 14***19 | Seal, Dowty | 1 |
| 25***62 | Plug, Oil Drain | 1 |
| 32***49 | Clip, Pipe | 1 |
V31-1-1 Oil Sump
| 13***3Z | Screw, Star Drive, M8 X 16 | 2 |
| 32***13 | Plug, Oil Drain | 2 |
| 32***50 | O Ring | 2 |
V32-1-1 Oil Pump
| 13***2Z | Bolt, M8 X 50 | 4 |
| 32***86 | Pump, Oil Hcr | 1 |
| 32***02 | Pump, Oil | 1 |
V33-1-1 Flywheel Assembly, W300 T/C
| 32***42 | Bolt, M14 X 108mm | 8 |
| 32***02 | Gear, Flywheel Ring, T=122 | 1 |
| 32***17 | Flywheel, Assembly, W300 T/C | 1 |
V33-6-1 Flywheel Assembly, 11.5"Sae
| 32***42 | Bolt, M14 X 108mm | 8 |
| 32***02 | Gear, Flywheel Ring, T=122 | 1 |
| 32***19 | Flywheel, Assembly, Cr 11.5" | 1 |
V34-1-1 Flywheel Housing, Fh4
| 13***7Z | Bolt, M8 X 25, Flange Reduced Hex | 4 |
| 13***2Z | Bolt, M8 X 50 | 8 |
| 13***6Z | Bolt, M8 X 70, Flange Reduced Hex | 1 |
V35-2-1 Camshaft, & Timing Gears, Heavy Duty Pto
| 32***76 | Camshaft, Assembly | 1 |
| 32***15 | Hub, Idler Gear | 1 |
| 32***17 | Bolt, Pan Head, M10 X 60mm | 3 |
V36-1-1 Timing Case & Covers
| 13***7Z | Screw, Star Drive, M10 X 25 | 2 |
| 13***9Z | Screw, Star Drive, M12 X 35 | 2 |
| 32***31 | Sealant, 518 | 0 |
V37-1-1 Piston & Con-Rod, Assemblies, Tc
| 32***17 | Bush, Small End | 1 |
| 32***40 | Bolt, Con-Rod, M8 X 57 | 2 |
| 32***50 | Circlip | 2 |
V38-1-1 Crankshaft Assembly
| 13***1Z | Screw, Star Drive, M10 X 45 | 1 |
| 21***05 | Dowel, Pin | 2 |
| 32***19 | Seal, Front Oil | 1 |
V38-2-1 Crankshaft Assembly, 11.5" Flywheel
| 13***1Z | Screw, Star Drive, M10 X 45 | 1 |
| 21***05 | Dowel, Pin | 2 |
| 32***75 | Hub, Flywheel | 1 |
V39-1-1 Cylinder Block, Assembly
| 13***5Z | Bolt, Flange Head, M8 X 20 Lg | 4 |
| 13***8Z | Bolt, Star Drive, M8 X 80 | 16 |
| 32***01 | Plug, Core, D=25mm | 1 |
V39-3-1 Cylinder Block, Assembly
| 13***5Z | Bolt, Flange Head, M8 X 20 Lg | 4 |
| 13***8Z | Bolt, M8 X 80, Flange Reduced Hex | 16 |
| 13***7Z | Bolt, M12 X 25mm, Reduce Flange Hex | 1 |
V39-2-1 Cylinder Block, Assembly
| 13***5Z | Bolt, Flange Head, M8 X 20 Lg | 4 |
| 13***8Z | Bolt, Star Drive, M8 X 80 | 16 |
| 32***01 | Plug, Core, D=25mm | 1 |
V42-1-1 Engine Mounting
| 13***7Z | Bolt, M12 X 25mm, Reduce Flange Hex | 12 |
| 13***9Z | Bolt, M10 X 35, Flange Reduced Hex | 4 |
| 32***46 | Bracket, Engine Mounting Right Hand Rear | 1 |
V43-1-1 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 |
V44-1-1 Air Induction Hoses, Installation
| 16***74 | Adapter, Vacuum Sensor | 1 |
| 22***13 | Clip, Jubilee; Replaces Khj0336 | 1 |
| 22***16 | Clip, Jubilee | 1 |
V45-1-1 Exhaust System
| 02***35 | Nut, Anti-Seize | 3 |
| 32***36 | Gasket, Turbo Outlet | 1 |
| 32***76 | Pipe, Exhaust Stub | 1 |
V46-1-1 Radiator & Fittings, Mountings
| 13***3Z | Bolt, M8 X 16, Flange Reduced Hex | 13 |
| 13***2Z | Bolt, M8 X 50 | 1 |
| 13***7Z | Bolt, M10 X 25, Flange Reduced Hex | 4 |
V47-1-1 Cooler, Combination
| 30***48 | Hose, Overspill | 1 |
| 30***49 | Clip | 2 |
| 30***57 | Bracket, Bottom Mounting | 1 |
V48-1-1 Radiator & Hoses
| 13***5Z | Bolt, M6 X 20, Reduced Flange Hex | 1 |
| 13***3Z | Bolt, M8 X 16, Flange Reduced Hex | 2 |
| 13***7Z | Bolt, M10 X 25, Flange Reduced Hex | 2 |
V49-1-1 Cooling Fan
| 13***8Z | Bolt, M8 X 80, Flange Reduced Hex | 4 |
| 32***23 | Spacer, Fan | 1 |
| 32***94 | Fan, 22" Pusher | 1 |
V50-2-1 Fuel System
| 32***07 | Filter, Fuel System | 0 |
| 33***23 | Filter, & Fuel Lift Pump, Assembly | 1 |
| 64***47 | Hose, Diesel Fuel | 1 |
V51-2-1 Fuel Filter
| 32***02 | Ring, Retaining | 1 |
| 32***03 | Seal, Dust | 1 |
| 32***08 | Bowl, Assembly | 1 |
V58-1-1 Crankcase, Breather
| 13***5Z | Bolt, M6 X 20, Reduced Flange Hex | 1 |
| 13***8Z | Bolt, M8 X 30, Flange Reduced Hex | 2 |
| 32***67 | Clip, 'P' (18 Dia) | 1 |
Frequently asked questions
What engine does the JCB 320/50100 (IPU ASSEMBLEY) use?
The JCB 320/50100 (IPU ASSEMBLEY) is the IPU assembly for the JCB Dieselmax Turbo Engine, specifically the 97kW 12V variant.
What is the operating weight of the JCB 320T?
The operating weight of the JCB 320T varies by configuration and model year, ranging from 4,960 kg to 5,248 kg.
What model replaced the JCB 320T?
The JCB 325T succeeded the 320T in JCB's compact track loader lineup.
What 320/50100(IPU ASSEMBLEY) owners discuss
What engine powers the JCB 320/50100 (IPU ASSEMBLEY) and what are its key specifications?
The JCB 320/50100 (IPU ASSEMBLEY) is powered by a JCB Dieselmax Turbo Engine. The IPU (Integrated Powertrain Unit) assembly for this configuration is rated at 97 kW (12v). The IPU engine family provides ratings up to 129 kW, with peak torque up to 690 Nm and a 4.8 L displacement. These engines feature full tropical-rated aluminium cooling packages, heavy-duty mounting feet, and heavy-duty air cleaners with integrated pre-cleaner systems. The specific part number for the 320/50100 IPU assembly is the OEM part reference. Other related IPU assemblies include the OEM part reference (the OEM part reference), the OEM part reference (the OEM part reference), the OEM part reference (the OEM part reference), and the OEM part reference (the OEM part reference). The the OEM part reference is listed as a JCB Dieselmax Turbo Engine (the OEM part reference) and the the OEM part reference as a Dieselmax Engine (the OEM part reference). Note that the JCB 320T compact track loader uses a different EcoMAX turbo diesel engine producing 55.18 kW and has an operating weight of 5,248 kg; it is not the same machine as the 320/50100 IPU assembly.
What are common hydraulic system behaviors and troubleshooting steps for JCB excavators?
For JCB excavators, load sense pressure should be verified by stalling out the bucket service and recording the pressure. Expected pressures are 290 bar and 320 bar. To generate maximum standard load sense pressure, stall out the bucket service and record the pressure. Select power boost and again stall out the bucket service, recording the pressure reading. If pressures are incorrect, adjust as required. For the dipper, operate and stall at max RPM and adjust screw C to set the LS pressure gauge to 320 bar. Lock nut D, hold C, and slacken lock nut B. Stall the dipper service again and set the pressure to 290 bar by screwing out A. Re-tighten lock nut B. Common issues include boom not lifting consistently when pulling back on the joystick, which may indicate hydraulic problems.
What are typical undercarriage or wear patterns for this machine type?
The provided source text does not contain specific information regarding undercarriage wear patterns, track shoe specifications, or typical wear rates for the JCB 320/50100 (IPU ASSEMBLEY) or related JCB excavator models. The JCB 320T compact track loader is noted for being built for tougher ground conditions, but no specific wear data is provided for the 320/50100 configuration.
What are known engine quirks or maintenance points for the JCB Dieselmax/IPU series?
The JCB IPU engines feature high-quality electrical engine harnesses. The Dieselmax Turbo Engine is associated with the 320/50100 configuration. Specific engine quirks, common failures, or maintenance intervals for the Dieselmax or IPU engines are not detailed in the provided source text. The sources list part numbers and general engine family specifications (displacement, torque, power rating) but do not provide operational quirks or service intervals for these specific engine models.
What are common electrical or sensor issues reported for JCB machines?
Common electrical issues in JCB backhoe loaders (such as the 3CX and 520 4) involve the forward/reverse shuttle system. Problems can include the machine revving up but not moving forward while reverse works. This is often caused by electrical faults rather than hydraulic ones. Specific issues include faulty forward microswitches or inhibitor switches that activate hydraulic solenoids on the transmission body. The forward/reverse lever operates microswitches that can fail or have bridged wires. Verification involves checking if the reverse solenoid is energized (screwdriver blade attracted to it) and ensuring the forward solenoid is not energized when in neutral. Power flow for the forward solenoid goes from the starter switch through a white wire to the fuse block (5 amp), then through the dump relay, forward/reverse switch, forward relay, to the forward solenoid. Faulty solenoids, loose connections, or short circuits in the wiring can cause failure to engage forward. Reading files off DCM 3.3+ with SH72546 on IPU engines is mentioned in the context of diagnostic tech work.
What should be checked when buying a used JCB 320/50100 (IPU ASSEMBLEY)?
When evaluating a JCB 320/50100 (IPU ASSEMBLEY), verify the specific engine configuration, as the 320/50100 IPU assembly (the OEM part reference) is distinct from the the OEM part reference (JCB Dieselmax Turbo Engine the OEM part reference) and the OEM part reference (Dieselmax Engine the OEM part reference). Check the condition of the high-quality electrical engine harnesses and the tropical-rated aluminium cooling package. Inspect the heavy-duty air cleaner with its integrated pre-cleaner system. Verify the hydraulic load sense pressures (290 bar and 320 bar) by stalling out the bucket and dipper services as per the troubleshooting guide. Ensure the forward/reverse shuttle solenoids and associated microswitches are functioning correctly, as electrical failures in these components are common in JCB machines. Note that the JCB 320T is a different machine (compact track loader with EcoMAX engine) and should not be confused with the 320/50100 IPU assembly.
What safety-critical fixes require dealer verification?
Adjusting the load sense pressure for the bucket and dipper services involves stalling the machine to record and set pressures (290 bar and 320 bar). This procedure requires precise adjustment of screws A, B, C and lock nuts B, D. Have your dealer verify these hydraulic pressure settings to ensure correct operation and safety. Additionally, any repairs to the high-voltage or high-current electrical systems, such as the engine harnesses or DCM 3.3+ diagnostics, should be verified by a dealer.
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 320/50100(IPU ASSEMBLEY). Related factory variants of the same model family:
320/50100(IPU ASSEMBLEY)320/50100(IPU ASSEMBLEY)320/50100(IPU ASSEMBLEY)
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