JCBconstructionmilitary machines
Jcb 3CXT-4 A.D.M.
Maintenance schedule, common problems & OEM parts breakdown
The JCB 3CXT-4 A.D.M. is a military-specification backhoe loader derived from the 3CX/4CX family, designed for construction, utility, and municipal applications. It features a JCB DieselMax or EcoMAX 4-cylinder turbocharged diesel engine, gross power ranging from 55 kW (74 hp) to 81 kW (109 hp) depending on the specific series configuration, and an operating weight between 7,887 kg and 9,500 kg. Production years for the 3CX/4CX lineage span from 2009 to 2017, with the 3CXT-4 A.D.M. representing a specialized variant for defense or government contracts. The machine combines a front loader bucket with a rear excavator arm, offering configurations with 6-speed autoshift transmissions, all-wheel steer, and integrated quick hitches. It succeeds earlier 3-series models and serves as a precursor to the modern 3CX PRO and 4CX PRO lines.
Across the 3CX/4CX generations, JCB introduced upgrades including a new gearbox, an outerbox extending dipper stick, increased automation, and the Command-Plus cab. These changes improved roading performance, reduced travel times by 25%, and lowered fuel consumption by 10%. The 3CXT-4 A.D.M. matters in the used and parts market because its military designation often implies higher build quality and durability, while its shared platform with the commercial 3CX/4CX ensures widespread parts availability. The extended 500-hour engine oil interval and lack of DEF/DPF systems make it attractive for operators seeking lower maintenance frequency and simpler emissions compliance compared to Tier 4/Stage V competitors.
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 3CXT-4 A.D.M. specifications
Engine
| Model | JCB DieselMax |
| Type | 4-cylinder turbocharged diesel |
| Displacement | 4.4 L (268.6 cu in) |
| Gross Power | 85 hp (63.4 kW) |
| Net Power | 82.6 hp (61.6 kW) @ 2200 rpm |
| Max Torque | 315.6 lb ft (428 Nm) @ 1200 rpm |
| Aspiration | Natural Aspirated |
Weights
| Operating Weight (2WD) | 14278 lb (6476 kg) |
| Operating Weight (4WD) | 14586 lb (6616 kg) |
| Max Weight | 16302 lb (7394 kg) |
Dimensions
| Transport Length | 18.12 ft (5.52 m) |
| Transport Width | 13.92 ft (4.24 m) |
| Transport Height | 11.16 ft (3.40 m) |
| Wheelbase | 6.93 ft (2.11 m) |
| Ground Clearance | 1.15 ft (0.35 m) |
| Height to Top of Suspended Cab | 9.26 ft (2.82 m) |
Performance
| Max Speed Forward | 20.6 mph (33.1 km/h) |
| Max Speed Reverse | 20.6 mph (33.1 km/h) |
| Turning Radius | 13.3 ft (4.05 m) |
| Bucket Breakout Force | 12127 lbf (53.9 kN) |
| Lift Capacity at Full Height | 6211 lb (2817 kg) |
| Max Dig Depth (Standard) | 14.34 ft (4.37 m) |
| Max Dig Depth (Extended) | 18.02 ft (5.49 m) |
| Max Reach at Load Height (Standard) | 5.68 ft (1.73 m) |
| Max Reach at Load Height (Extended) | 9.09 ft (2.77 m) |
| Clearance at Max Dump Height | 8.83 ft (2.69 m) |
| Reach at Max Dump Height | 2.66 ft (0.81 m) |
Service capacities (summary)
| Fuel Tank | 34.4 gal (130 L) |
| Hydraulic System Fluid | 30.4 gal (115 L) |
| Engine Oil | 4 gal (15 L) |
| Cooling System | 4.9 gal (18.5 L) |
| Transmission Fluid | 4.3 gal (16 L) |
| Rear Axle Fluid | 4.3 gal (16 L) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Jcb 3CXT-4 A.D.M. maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the 3CXT-4 A.D.M. beyond the schedule
Predictive Maintenance & Fluid Analysis
Baseline fluid analysis at the 500-hour interval is critical for the 3CXT-4 A.D.M. Take samples from the engine, hydraulic system, front and rear axles, and final drives. Compare future results against this baseline to detect developing bearing wear, seal failure, or contamination 500 to 800 hours before catastrophic failure. The DieselMax and EcoMAX engines do not use DEF or DPF regen, simplifying fluid management but requiring strict adherence to the 500-hour oil change interval to prevent sludge formation. Monitor hydraulic oil temperature and pressure trends to identify pump wear early.
Corrective & Common Repairs
Common repairs on the 3CXT-4 A.D.M. include replacing primary and secondary fuel filters to protect common-rail injectors, which are sensitive to dirty fuel. Inspect the turbocharger shaft play, boot condition, and wastegate function on DieselMax units regularly. Check the alternator and starter load capacity to prevent electrical strandings. Address hydraulic hose chafing and pinhole seepage at the kingpost and boom promptly. Replace worn GET components like teeth and cutting edges to maintain digging efficiency and reduce stress on the loader arm and backhoe dipper.
Overhaul & Rebuild Points
The 2,000-hour interval marks a major overhaul point for the 3CXT-4 A.D.M. Perform a full hydraulic oil change, cleaning the tank thoroughly. Inspect the swing ring play using radial and axial dial indicators on applicable configurations. Check the structural integrity of the boom, arm/dipper, loader arm, chassis, and side frames for cracking or unauthorized welding. Service the brakes, inspecting disc wear and immersed brake condition. Check injector spray patterns via diagnostic tool and replace as required. These tasks determine whether the machine can sustain long-term service life or requires major component replacement.
Seasonal & Environment Servicing
In cold climates, verify the grid heater operation and use JCB-spec long-life coolant to prevent silicate separation and corrosion. Check the cab HVAC system, including A/C pressure and evaporator condition, to ensure operator comfort and defrosting capability. In dusty environments, monitor the primary air filter restriction indicator closely and replace or clean as needed to protect the DieselMax or EcoMAX engine. Inspect the undercarriage and tires/tracks for damage from debris or extreme temperatures. Ensure the battery electrolyte levels are correct on non-sealed units to prevent starting failures in cold weather.
3CXT-4 A.D.M. common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 32/400701 | Kit, Fuel Element | Fuel system service | Check fitment → |
| 02/200165 | Pipe, Assembly, Fuel, L/Pump To F/Filter | Fuel system service | Check fitment → |
| 02/200176 | Pipe, Assembly, Fuel, Filter To Inj/Pump | Fuel system service | Check fitment → |
| 02/200177 | Pipe, Assembly, Fuel, Inj/Pump To F/Filter | Fuel system service | Check fitment → |
| 02/200178 | Pipe, Assembly, Fuel, Filter To Heater | Fuel system service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
3CXT-4 A.D.M. fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| P0087 | Fuel Rail Pressure Too Low | Fuel supply restriction, failing lift pump, or leaking injector | Check fuel filters and line integrity; verify lift pump operation |
| P0117 | Engine Coolant Temperature Sensor Circuit Low Voltage | Faulty coolant sensor, shorted wiring harness, or poor ground | Inspect sensor connector for corrosion; test sensor resistance |
| P0521 | Engine Oil Pressure Sensor Range/Performance Issue | Failing oil pressure sensor or low oil level | Check oil level; test sensor signal with multimeter |
| P2047 | Reductant Injector Circuit Open (SCR System) | DEF injector wiring fault or clogged injector nozzle | Inspect DEF injector harness and connectors for damage |
| U0100 | Lost Communication with Engine Control Module | CAN bus network fault, blown fuse, or loose connector | Check diagnostic port connections and main fuses; inspect CAN wiring |
| P0335 | Crankshaft Position Sensor 'A' Circuit No Signal | Failed crank sensor or damaged signal ring | Inspect sensor gap and wiring; verify signal ring integrity |
| P0101 | Mass Air Flow (MAF) Sensor Circuit Range/Performance | Dirty or failing MAF sensor | Clean MAF sensor element; check air intake for leaks |
| P0200 | Injector Circuit Malfunction (General) | Open circuit in injector wiring or faulty injector solenoid | Check injector harness continuity and connector pins |
| P0112 | Intake Air Temperature Sensor Circuit Low Voltage | Shorted IAT sensor or wiring | Inspect IAT sensor and wiring for shorts to ground |
| P0113 | Intake Air Temperature Sensor Circuit High Voltage | Open circuit in IAT sensor wiring | Check IAT sensor connector for loose pins or broken wires |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
3CXT-4 A.D.M. attachments & work tools
Loader Buckets
Standard shovel capacity ranges from 1.0 to 1.3 m³ (1.3 to 1.7 yd³) for the 3CX and 4CX class. The machine supports multiple shovels and attachment options to maximize loader end versatility.
Backhoe Buckets
Backhoe bucket capacity is typically 0.2 to 0.3 m³ (0.26 to 0.39 yd³). The machine features an outerbox extending dipper stick on center mount variants or an innerbox excavating dipper stick on sideshift variants.
Quick Couplers
The Q-Fit quick coupler is standard for the loader end, allowing for quick-swap of attachments. The machine also features an integrated quick hitch with forks for rear tool carrier compatibility.
Specialized Attachments
Available tools include scrap grapples for recycling, brush grapples for land clearing, and ditch maintenance buckets for utility installation. The tool carrier is set up as standard to accept these variations.
Hydraulic Configurations
Hydraulic system flow is rated at 160 L/min (42.2 gpm). The machine includes an optional handheld tool auxiliary circuit for specialized attachments.
Steering & Cab Options
Configurations include all-wheel steer, crab steer, and two-wheel steer modes. The Command-Plus cab features a 7-inch color display and forward-facing wide-angle camera for visibility.
All 3CXT-4 A.D.M. assemblies by section
Every catalogued assembly group for the Jcb 3CXT-4 A.D.M.. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
A Attachments
A1-2-1 Tooth & Toeplate, Options, For 6 In 1 Clam Shovel
| 12***45 | Tooth | 9 |
| 13***01 | Nut | 27 |
| 14***11 | Washer | 9 |
A1-1-1 Shovel, Clam, 6 In 1, 2438mm (8'0") Wide
| 10***04 | Pin, Pivot | 2 |
| 10***18 | Pin, Pivot | 2 |
| 10***28 | Pin, Pivot 44.4mm Dia, 213mm Long | 2 |
A2-1-1 Bucket
| 10***04 | Boss, Pivot | 4 |
| 12***43 | Sidecutter, Double Flange, Right Hand | 1 |
| 12***44 | Sidecutter, Double Flange, Left Hand | 1 |
A2-2-1 Tooth, Ripper
| 14***01 | Nipple, Grease, Straight, 1/8 Bsp | 1 |
| 52***00 | Tooth, Ripper Fabrication | 1 |
| 52***01 | Tooth, Tip | 1 |
A3-2-1 Carriage, Fork
| 12***30 | Carrier, Fork | 1 |
| 12***31 | Carrier, Rail | 1 |
| 12***60 | Strap, Lashing Assembly | 2 |
A3-4-1 Winch
| 12***00 | Wire, Rope | 1 |
| 12***00 | Attachment, Winch | 1 |
| 12***01 | Drum, Rope | 1 |
A3-3-1 Tow Hitch, Rear
| 12***1P | Block | 2 |
| 12***21 | Plate, Mounting | 1 |
| 12***23 | Bolt, Clamp | 2 |
A3-1-1 Quickhitch, Carriage
| 10***53 | Pin, Pivot; See Note 1. Fit/Funct M/C M585376, Pin, Pivot | 2 |
| 10***32 | Pin, Pivot | 2 |
| 12***24 | Pin, Locking | 2 |
B Body & Framework
B1-2-1 Tank, Hydraulic, Fittings
| 12***00 | Tap, Drain | 1 |
| 12***94 | Cap, Hydraulic Tank | 1 |
| 12***95 | Breather | 1 |
B1-3-1 Tank, Diesel Fuel, Fittings
| 10***06 | Lock; Supply 12***71 | 1 |
| 12***01 | Cover | 1 |
| 12***00 | Cap, Filler,Diesel Fuel | 1 |
B1-1-1 Mainframe
| 11***00 | Frame, Rear | 1 |
| 12***00 | Leg, Outer, Right Hand | 2 |
| 12***06 | Mounting, Axle | 2 |
B1-5-1 Bonnet
| 10***06 | Lock; Supply 12***71 | 1 |
| 12***00 | Latch, Claw | 1 |
| 12***00 | Bracket | 1 |
B1-4-1 Stabiliser, Sideshift
| 10***10 | Pin, Pivot | 2 |
| 10***37 | Pin, Pivot | 2 |
| 12***01 | Spacer | 4 |
B1-7-3 Step With Toolbox
| 10***06 | Lock; Supply 12***71 | 2 |
| 12***01 | Spacer | 2 |
| 12***07 | Bracket, Jerry Can Support, Left Hand | 1 |
B1-6-1 Grille, Front
| 12***48 | Mounting, Engine | 4 |
| 12***35 | Grille, Front | 1 |
| 13***9Z | Bolt, M10 X 35 | 4 |
B2-1-1 Cab Base
| 10***06 | Lock; Supply 12***71 | 1 |
| 12***02 | Plate, Compression | 8 |
| 12***03 | Mounting, Cab, Rubber; Use 26***05, San 04452 | 4 |
B2-3-1 Cab Assembly, Rear Section
| 12***77 | Glass, Rear Frame | 1 |
| 12***80 | Stud, Swing | 6 |
| 12***81 | Spacer | 2 |
B2-5-3 Seat, Suspension
| 12***47 | Spacer | 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***7Z | Bolt, M10x25 | 4 |
B2-2-1 Cab Assembly, Front Section
| 12***05 | Bolt, Closing | 2 |
| 12***02 | Stay, Door | 2 |
| 12***00 | Mirror, With Bracket | 2 |
B2-7-1 Door, Clear Glass, Right Hand
| 12***07 | Knob, Interior | 1 |
| 12***00 | Lock, Door, Right Hand | 1 |
| 12***01 | Key, No. 1001 | 1 |
B2-6-1 Soundproofing, Engine
| 12***22 | Panel, Engine, Right Hand | 1 |
| 12***23 | Panel, Engine, Left Hand | 1 |
| 81***96 | Label, Warning | 2 |
B2-4-1 Wash/Wipe, Windscreen
| 12***00 | Pump, And Reservoir; Replaced By 25***00, See San07699, Single Pump Type. Refer To Page C3-3-1 For Machines Not Fitted With Non Return Valve At Base Of Bottle., Pump, And Reservoir; Replaced By 25***00, See San07699 | 1 |
| 25***03 | Jet, Screen Washer | 1 |
| 53***03 | Valve, Non-Return | 1 |
B2-7-2 Door, Clear Glass, Left Hand
| 12***07 | Knob, Interior | 1 |
| 12***00 | Lock, Door, Left Hand | 1 |
| 12***00 | Latch, Claw | 1 |
B3-3-1 Safety Strut, Loader Arms
| 12***00 | Strap | 1 |
| 12***02 | Stop | 2 |
| 12***44 | Wire, Retaining, Safety Strut | 1 |
B3-2-1 Arms, Loader, Parallel Lift
| 10***15 | Pin, Pivot, 165mm Long | 2 |
| 10***26 | Pin, Pivot | 6 |
| 12***23 | Bush | 10 |
B4-3-1 Kingpost, Sideshift
| 10***16 | Pin, Pivot | 1 |
| 12***00 | Kingpost | 1 |
| 12***00 | Pipe, Assembly, Left Hand | 1 |
B4-1-1 Kingpost Carriage
| 12***1P | Bracket; Replaced By 12***01, See San07588 | 2 |
| 12***00 | Carriage, Sideshift; Replaced By 12***26, See San05016 | 1 |
| 12***28 | Pin, Clampimg | 4 |
B4-2-1 Slew/Swing, Components, Sideshift
| 12***00 | Plate | 1 |
| 12***04 | Spacer | 2 |
| 12***06 | Damper | 2 |
B4-5-1 Dipper, Standard
| 10***47 | Pin, Pivot | 1 |
| 10***59 | Pin, Pivot | 1 |
| 10***33 | Pin, Pivot | 1 |
B4-4-1 Boom
| 10***23 | Pin, Pivot | 1 |
| 10***40 | Pin, Pivot | 1 |
| 12***00 | Boom, 2200mm Long | 1 |
B5-5-1 Paint
| 42***02 | Paint, Eau-De-Nil, Undercoat | 1 |
| 42***02 | Paint, Green, Nato | 1 |
B5-4-1 Fire Extinguisher
| 25***00 | Bracket, Fire, Extinguisher | 1 |
| 25***00 | Extinguisher, Fire | 1 |
B5-2-1 Decals
| 81***50 | Label, Transmission Filler | 1 |
| 81***55 | Label, Diesel | 1 |
| 81***56 | Label, Hydraulic Fluid | 1 |
B5-3-1 Tool Kit, Standard
| 27***00 | Bag, Tool | 1 |
| 70***00 | Lead, Jump | 1 |
| 82***02 | Spanner, 7/16" X 1/2" A/F | 1 |
B5-1-1 Decals, Loader & Excavator, Controls
| 81***81 | Decal, Hydraclamp | 1 |
| 81***82 | Decal, Stabiliser | 1 |
| 81***40 | Decal, Jcb, Cross Pattern Lh | 1 |
C Electrics
C1-2-1 Motor, Wiper
| 71***00 | Blade, Wiper | 1 |
| 71***00 | Arm | 1 |
| 71***00 | Motor, Wiper | 1 |
C1-1-1 Harness, Machine Electrics
| 12***90 | Tie, Cable 175mm Long, L=180mm X W=9.0mm | 24 |
| 12***95 | Clip, Harness Support | 1 |
| 12***55 | Tie, Cable | 1 |
C1-3-6 Light, Working
| 12***39 | Guard | 4 |
| 13***4Z | Bolt, 3/8" | 16 |
| 14***6Z | Washer, Spring | 16 |
C1-7-2 Light, Rear Fog
| 12***00 | Guard, Fog Light | 1 |
| 13***6Z | Bolt | 4 |
| 14***3Z | Washer | 4 |
C1-6-1 Light, Beacon, Hazard Warning
| 70***01 | Bulb, 12v 55w, Halogen | 1 |
| 70***00 | Beacon, Magnetic, (Amber) | 1 |
| 70***01 | Lens, Amber, 146mm Dia | 1 |
C1-3-2 Light, Head & Side
| 12***00 | Guard, Head Light | 2 |
| 13***6Z | Bolt, Bolt; See Index B3 For Sideshift Arrangement. Refer To Index B3 For Sideshift Arrangement. | 2 |
| 13***1Z | Nut | 2 |
C1-8-1 Light, Convoy
| 12***66 | Plate, Convoy Light | 1 |
| 70***00 | Light, Convoy | 1 |
C1-3-1 Light, Rear, Sideshift
| 12***45 | Plate | 2 |
| 12***49 | Clip | 2 |
| 12***00 | Guard, Rear Light | 2 |
C1-7-1 Light, Number Plate
| 12***01 | Bracket | 2 |
| 14***07 | Washer | 2 |
| 70***06 | Nut; Nla | 2 |
C2-1-1 Electrics, Engine
| 02***23 | Switch, Oil Pressure | 1 |
| 10***01 | Gasket | 1 |
| 12***01 | Bracket | 1 |
C2-3-1 Alternator, A127-65amp 12.Volt
| 02***12 | Pulley, Alternator, D=86mm Single Groove | 1 |
| 71***00 | Alternator; Lucas Ref.24158. Type Of Alternator Best Identified By Lucas Ref Stamped On Body., Alternator; Lucas Ref.24158. Type Of Alternator Best Identified By Lucas Ref,Stamped On Body., Alternator, Alternator; Lucas Ref. 24158. Type Of Alternator Best Identified By Lucas Ref, Stamped On Body. | 1 |
| 71***01 | Capacitor, Suppression | 1 |
C2-5-1 Motor, Starter, M127 12.Volt
| 02***02 | Stud | 3 |
| 02***59 | Nut | 3 |
| 12***06 | Cover, Solenoid | 1 |
C2-6-2 Heater, Installation
| 12***02 | Plug | 1 |
| 12***01 | Handle | 1 |
| 12***02 | Tap | 1 |
C2-4-1 Alternator Mountings, Ab Build
| 02***92 | Washer | 1 |
| 02***11 | Bracket, Alternator Mounting | 1 |
| 02***22 | Bracket, Support | 1 |
C2-6-1 Heater, Installation
| 12***01 | Tap | 1 |
| 12***13 | Pipe, Outlet, Flanged | 1 |
| 12***17 | Duct | 1 |
C2-2-1 Battery, Carrier
| 10***00 | Clamp | 1 |
| 12***03 | Cover, Protection | 1 |
| 12***15 | Bolt | 2 |
C2-8-1 Alarm, Reverse
| 70***00 | Switch | 1 |
| 70***00 | Alarm | 1 |
| 70***00 | Harness, Reverse Alarm | 1 |
C3-4-1 Switch, Column
| 12***00 | Lock, Lever | 1 |
| 13***3Z | Capscrew | 2 |
| 14***1Z | Washer, Plain | 2 |
C3-1-2 Instrument Cluster, 38 Kph
| 70***02 | Bezel | 1 |
| 70***03 | Glass | 1 |
| 70***04 | Seal | 1 |
C3-2-1 Instrument Panel
| 12***52 | Cover, Brake Reservior | 1 |
| 12***64 | Spacer | 2 |
| 12***65 | Bracket, Relay | 1 |
C3-1-3 Instrument Cluster, 38 Kph
| 12***68 | Bracket | 2 |
| 26***01 | Clip, Connector | 2 |
| 70***00 | Cluster, Instrument Panel, 38kph | 1 |
C3-5-1 Gauges, Ammeter, Engine Oil Pressure
| 12***03 | Tie, Cable, L=300mm X W=7.6mm | 5 |
| 12***17 | Cover, Plate | 1 |
| 12***19 | Panel | 1 |
D Controls
D1-9-1 Control Knob, Loader Valve
| 12***59 | Ring, Tolerance | 1 |
| 12***16 | Base, Control Knob | 1 |
| 12***17 | Top, Control Knob | 1 |
D1-3-1 Control, Auxiliary Valve
| 12***01 | Knob | 1 |
| 12***49 | Spool, Lever Release | 1 |
| 12***75 | Cover | 1 |
D1-2-1 Control, Excavator, X Pattern
| 11***16 | Joint, Universal | 2 |
| 12***01 | Knob | 2 |
| 12***02 | Knob, Controls, Yellow | 2 |
D1-1-1 Control, Loader Valve, 1,2,3 Spool
| 11***16 | Joint, Universal | 1 |
| 12***00 | Bracket | 1 |
| 12***11 | Gaiter | 1 |
D1-1-2 Control, Loader Valve, 4 Spool
| 10***01 | Knob, Large Dia. | 1 |
| 12***11 | Gaiter | 1 |
| 12***75 | Rod, Control | 1 |
D1-8-1 Control Lever, In Cab Slew Lock
| 12***00 | Reservoir | 1 |
| 12***30 | Rod, Push | 1 |
| 12***69 | Bracket | 1 |
D2-1-1 Control Pedal, Brake
| 12***01 | Plate, Lock | 1 |
| 12***01 | Pin, Pivot | 1 |
| 12***02 | Clip | 1 |
D2-2-1 Control, Parking Brake
| 12***66 | Bracket | 1 |
| 12***04 | Gaiter, Brake Lever | 1 |
| 13***06 | Bolt | 2 |
D3-1-1 Control, Throttle, Ab Build
| 02***83 | Bracket, Control | 1 |
| 02***88 | Spring | 1 |
| 12***00 | Pedal, Throttle | 1 |
D3-3-1 Control, Transmission Dump
| 12***01 | Plate, Keep | 1 |
| 12***00 | Bracket, 4wd Controls | 1 |
| 12***00 | Bracket, 2wd Controls | 1 |
E Hydraulics
E1-3-1 Circuit, Loader, Auxiliary 4 Spool
| 13***8Z | Bolt | 2 |
| 13***2Z | Bolt | 2 |
| 14***15 | Washer, Seal; Replaces Khj0891 | 4 |
E1-12-1 Circuit, Hydraulic Clamping
| 11***44 | Lever, Hydraclamp | 1 |
| 12***02 | Knob, Controls, Yellow | 1 |
| 12***38 | Bracket, Hydraclamp Control | 1 |
E1-1-1 Circuit, Neutral
| 12***00 | Pipe | 1 |
| 14***26 | Washer, Seal | 3 |
| 16***08 | Adapter | 3 |
E1-14-1 Clamps, Hose, Neutral Circuit
| 12***62 | Bracket | 1 |
| 13***8Z | Bolt | 8 |
| 13***3Z | Nut | 7 |
E1-2-1 Circuit, Loader
| 12***00 | Pipe, Assembly | 1 |
| 13***8Z | Bolt | 2 |
| 13***03 | Nut | 2 |
E1-15-1 Circuit, Rear Power Take Off
| 13***8Z | Bolt | 1 |
| 13***3Z | Nut | 1 |
| 14***15 | Washer, Seal; Replaces Khj0891 | 4 |
E1-4-1 Circuit, Transmission
| 12***03 | Tie, Cable, L=300mm X W=7.6mm | 2 |
| 13***4Z | Bolt, Bolt; To Secure The Diagonal Edge. Used To M602765 (926) And M608319 (930) | 1 |
| 14***4Z | Washer, Spring | 1 |
E1-16-1 Circuit, Winch
| 14***08 | Seal, Washer | 1 |
| 14***11 | Seal, Bonded | 5 |
| 14***21 | Seal, Bonded 3/4" Bsp | 5 |
E1-5-4 Circuit, Steering
| 12***56 | Plate | 1 |
| 14***18 | Seal, Bonded, 1/2" Bsp | 1 |
| 16***04 | Adapter, Male/Female | 1 |
E1-8-1 Circuit, Backhoe
| 12***00 | Pipe | 1 |
| 13***4Z | Bolt, 3/8" | 2 |
| 61***00 | Hose | 2 |
E1-7-1 Circuit, Stabiliser, Sideshift
| 61***00 | Hose, 1/4"Bsp 1370mm | 4 |
E1-10-1 Circuit, Backhoe, Valve To Kingpost
| 12***58 | Clamp | 2 |
| 12***64 | Pipe, Slew | 1 |
| 12***65 | Pipe, Slew | 1 |
E2-4-1 Pump, Steering
| 02***42 | Bolt | 2 |
| 11***70 | Gasket | 1 |
| 12***75 | Gear, Helical 16 Teeth | 1 |
E2-3-1 Shaft, Pump Drive
| 13***8Z | Bolt | 4 |
| 13***04 | Screw, Grub | 1 |
| 14***03 | Nipple, Grease | 2 |
E2-2-1 Pump, Main Hydraulic
| 13***8Z | Bolt | 4 |
| 13***3Z | Nut | 2 |
| 14***18 | Seal, Bonded, 1/2" Bsp | 1 |
E3-10-1 Valve, Steering
| 14***18 | Seal, Bonded, 1/2" Bsp | 4 |
| 16***07 | Adapter | 2 |
| 16***10 | Adapter | 2 |
E3-1-1 Valve, Loader
| 12***26 | Mounting, Rubber | 3 |
| 13***03 | Nut | 6 |
| 14***11 | Seal, Bonded | 1 |
E3-1-3 Valve, Spool, Loader
| 24***07 | O Ring | 2 |
| 25***18 | Spacer | 2 |
| 25***20 | Retainer | 2 |
E3-4-2 Valve, Section, Backhoe Auxiliary
| 25***27 | Plate, Seal Retainer | 2 |
| 25***28 | Seal, Wiper | 2 |
| 25***29 | O Ring | 2 |
E3-7-1 Filter, Hydraulic
| 13***2Z | Bolt | 2 |
| 13***4Z | Nut, Philidas Thin | 2 |
| 14***2Z | Washer | 2 |
E3-6-1 Valve, Components, Backhoe
| 12***00 | Valve, Excavator, Side Shift | 1 |
| 25***01 | Screw | 12 |
| 25***02 | Retainer, Wiper | 12 |
E3-4-1 Valve, Auxiliary, Power Take Off
| 25***03 | Kit, Seal, Intersections; Superseded By 25/40***08 Same Seals + 2 Small, Pilot Seals. See San 10911. | 2 |
| 25***05 | Washer | 6 |
| 25***06 | Nut | 6 |
E3-6-3 Valve, Rotary Clamp, Backhoe
| 25***03 | Seal, Wiper; Replaced By 25/97***48, See San04109 | 1 |
| 25***19 | Valve, Hydraclamp; Replaced By 25/61***01 See San04850., Existing Valve Will Not Replace New Valve. | 1 |
| 25***33 | O Ring | 1 |
E3-9-1 Valve, Unloader
| 13***0Z | Bolt | 2 |
| 13***3Z | Nut | 2 |
| 14***11 | Seal, Bonded | 3 |
E3-1-7 Valve, Spool, Mechanical Detent, Loader
| 24***05 | O Ring | 1 |
| 24***20 | O Ring | 1 |
| 24***07 | O Ring | 2 |
E3-11-1 Valve, Shock, Steering
| 13***10 | Screw, Cap | 2 |
| 35***00 | Valve, Complete | 1 |
| 35***02 | Valve, Assembly, Shock | 1 |
E3-1-4 Valve, Spool, Electric Detent, Loader
| 24***07 | O Ring | 2 |
| 25***18 | Spacer | 2 |
| 25***20 | Retainer | 2 |
E3-1-5 Valve, Relief, Loader Hydraulic
| 13***02 | Nut | 1 |
| 25***03 | Nut, Acorn | 1 |
| 25***06 | Seal | 2 |
E3-1-6 Valve, Main Relief, Loader Valve
| 24***06 | O Ring | 2 |
| 25***21 | Valve, Poppet | 1 |
| 25***22 | Spring | 1 |
E3-8-1 Lubricants & Filters
| 02***73 | Element, Oil Filter, Canister Type - Long | 1 |
| 02***84 | Element, Oil Filter, Canister Type-Short | 1 |
| 32***01 | Element, Air-Safety | 1 |
E3-5-1 Valve, Backhoe, Adaptors & Mountings
| 12***00 | Bracket, Ex. Valve Mounting | 1 |
| 12***00 | Valve, Excavator, Side Shift | 1 |
| 13***0Z | Bolt, 1/2" X 1.1/2" Long | 4 |
E3-1-2 Valve, Relief, Check & Overload, Loader
| 13***02 | Nut | 1 |
| 24***07 | O Ring | 1 |
| 24***11 | O Ring | 2 |
E3-6-2 Valve, Relief, Backhoe
| 25***12 | O Ring | 1 |
| 25***26 | Shim | 1 |
| 25***39 | Valve, Relief, 4500 Psi | 1 |
E4-13-2 Seal Kit, Shovel Ram
| 24***15 | O Ring | 1 |
| 24***27 | O Ring | 1 |
| 24***6A | Seal, Gland, 50mm Piston Rod | 1 |
E4-13-1 Seal Kit, Clam Shove, L Ram
| 24***10 | O Ring | 1 |
| 24***25 | O Ring | 1 |
| 24***4A | Seal, Gland, 40mm Piston Rod | 1 |
E4-13-2 Seal Kit, Lift Ram
| 24***15 | O Ring | 1 |
| 24***27 | O Ring | 1 |
| 24***6A | Seal, Gland, 50mm Piston Rod | 1 |
E4-13-4 Seal Kit, Dipper Ram
| 24***18 | O Ring | 1 |
| 24***21 | O Ring | 1 |
| 24***8A | Seal, Gland, 60mm Piston Rod | 1 |
E4-1-1 Ram, Lift
| 12***15 | Bush | 1 |
| 12***18 | Bush | 1 |
| 12***00 | Ram, Loader Arm, 50mm Rod X 80mm Cyl | 2 |
E4-9-1 Ram, Stabiliser
| 12***00 | Ram, Stabiliser, Side Shift | 2 |
| 55***04 | Circlip, 40mm Piston Rod | 1 |
| 55***01 | Gland, Bearing | 1 |
E4-4-1 Ram, Clamshovel, 6 In 1
| 12***11 | Bush | 1 |
| 12***19 | Bush | 1 |
| 14***01 | Nipple, Grease, Straight, 1/8 Bsp | 2 |
E4-13-3 Seal Kit, Bucket Ram
| 24***15 | O Ring | 1 |
| 24***18 | O Ring | 1 |
| 24***6A | Seal, Gland, 50mm Piston Rod | 1 |
E4-8-1 Ram, Carriage
| 24***06 | O Ring | 1 |
| 55***01 | Head, Piston | 1 |
| 55***03 | Wire, Retaining | 1 |
E4-3-1 Ram, Steering, 4wd, Front
| 14***01 | Nipple, Grease, 90deg. Angle | 1 |
| 24***03 | O Ring | 1 |
| 55***01 | Head, Piston | 1 |
E4-2-1 Ram, Shovel
| 12***15 | Bush | 1 |
| 12***18 | Bush | 1 |
| 12***00 | Ram, Shovel, 40mm Rod X 70mm Cyl | 2 |
E4-3-2 Ram, Steering, 4wd, Rear
| 14***01 | Nipple, Grease, 90deg. Angle | 1 |
| 24***03 | O Ring | 1 |
| 55***01 | Head, Piston | 1 |
E4-6-1 Ram, Dipper
| 12***15 | Bush | 1 |
| 12***20 | Bush | 1 |
| 12***00 | Ram, Dipper, 60mm Rod X 100mm Cyl | 1 |
E4-13-1 Seal Kit, Stabiliser, Ram, Sideshift
| 24***10 | O Ring | 1 |
| 24***25 | O Ring | 1 |
| 24***4A | Seal, Gland, 40mm Piston Rod | 1 |
E4-13-7 Seal Kit, Boom Ram
| 24***18 | O Ring | 1 |
| 24***24 | O Ring | 1 |
| 24***8A | Seal, Gland, 60mm Piston Rod | 1 |
E4-7-1 Ram, Bucket
| 12***15 | Bush | 1 |
| 12***20 | Bush | 1 |
| 12***00 | Ram, Bucket, 50mm Rod X 90mm Cyl | 1 |
E4-5-1 Ram, Boom
| 12***17 | Bush | 1 |
| 12***21 | Bush | 1 |
| 12***00 | Ram, Boom, 60mm Rod X 110mm Cyl | 1 |
F Axles, Wheels & Transmission
F1-9-1 Propshaft, Transmission
| 13***12 | Bolt | 16 |
| 13***03 | Nut | 16 |
| 91***00 | Propshaft | 1 |
F1-3-1 Transmission, Jcb Syncro Shuttle, Internal Components
| 13***05 | Bolt | 5 |
| 44***03 | Sleeve | 1 |
| 44***04 | Gear, 36t; Non-Turbo'S Plus All French & German Machines. See T.I. 023, Gear, 36t | 1 |
F1-2-1 Transmission, Jcb Syncro Shuttle, Drop Box
| 13***08 | Bolt | 10 |
| 14***14 | Washer | 1 |
| 22***71 | Circlip | 1 |
F1-5-1 Transmission, Clutch Unit, Drop Box
| 22***04 | Circlip | 1 |
| 24***21 | O Ring | 1 |
| 24***44 | O Ring | 1 |
F1-6-1 Torque Converter, Drive Plate, & Transmission Dipstick
| 02***70 | Dowel | 2 |
| 04***00 | Converter, 2 Purple & 1 White, Spot. 2.2:1 Ratio | 1 |
| 04***00 | Kit-Drive Plate | 1 |
F1-4-1 Transmission, Jcb Syncro Shuttle, Reverser Unit
| 13***02 | Plug, Blanking | 2 |
| 22***57 | Circlip, External | 4 |
| 22***94 | Circlip | 2 |
F1-1-1 Transmission, Jcb Syncro Shuttle, External Components
| 02***84 | Element, Oil Filter, Canister Type-Short | 1 |
| 04***19 | Seal, Oil; Replaced By 20/91***01, See San 10374 | 1 |
| 13***07 | Bolt | 4 |
F1-5-2 Transmission, Jcb Syncro Shuttle, Gear Change
| 12***01 | Gaiter | 1 |
| 12***03 | Plate | 1 |
| 12***04 | Knob | 1 |
F2-3-1 Knuckle, Steering, 4wd Axle
| 13***05 | Bolt | 4 |
| 13***08 | Bolt | 16 |
| 41***02 | Sealant, Locking | 1 |
F2-7-1 Transmission, Mounting
| 11***09 | Washer | 4 |
| 11***01 | Mounting, Metalastik | 2 |
| 12***00 | Mounting | 1 |
F2-4-1 Hub & Components, 4wd Steer Axle
| 10***01 | Nut | 10 |
| 13***07 | Bolt | 32 |
| 13***08 | Bolt | 12 |
F2-2-1 Axle Assembly, 4wd, Steering
| 13***8Z | Bolt, 1/2" X 3.3/4" Long | 1 |
| 13***05 | Bolt | 4 |
| 13***08 | Bolt | 12 |
F2-5-1 Differential, 4wd Steer Axle
| 14***09 | Washer | 1 |
| 44***02 | Spacer, Collapsible | 1 |
| 44***05 | Nut, Adjusting | 2 |
F3-3-2 Crown Wheel & Pinion, 15.587 : 1
| 45***00 | Gear, Crownwheel/Pinion, 41t/11 | 1 |
| 45***03 | Pin | 1 |
| 45***05 | Pin, Lock | 1 |
F3-2-2 Differential, Housing Assembly, 15.587 : 1
| 13***05 | Bolt | 14 |
| 13***09 | Bolt | 16 |
| 14***15 | Washer | 1 |
F3-1-2 Axle Assembly, Drive, Rear, 15.587 : 1 Ratio
| 10***01 | Nut | 16 |
| 12***01 | Spacer | 2 |
| 13***2Z | Bolt | 4 |
F3-4-4 Wheels & Tyres, 4wd
| 10***01 | Nut | 26 |
| 12***26 | Stop, 14mm | 2 |
| 41***00 | Wheel, Dw16l X 24 | 2 |
G Brakes
G1-2-1 Brake Assembly
| 13***09 | Bolt | 16 |
| 13***07 | Capscrew | 12 |
| 45***01 | Plate, Back | 2 |
G1-1-10 Brake System, Servo
| 12***00 | Pipe, Rh | 1 |
| 12***00 | Pipe, Lh | 1 |
| 12***00 | Reservoir | 2 |
G1-3-2 Brake, Parking
| 13***0Z | Bolt, 1/2" X 1.1/2" Long | 2 |
| 13***07 | Bolt | 3 |
| 13***04 | Nut | 2 |
G1-4-1 Brake, Servo
| 12***57 | Bracket, Servo | 1 |
| 13***7Z | Bolt | 2 |
| 13***6Z | Bolt | 1 |
H Steering
H1-1-1 Steering Column
| 11***08 | Cover | 1 |
| 11***22 | Wheel, Steering; Part Is Mss Use The Following 12***00, 123/, 03842, 12***45. See San03769 | 1 |
| 12***01 | Shaft, Steering Column | 1 |
N Engine, 4.40 & T4.40
N1-1-2 Engine, Complete, Ab Build
| 01***00 | Engine, Complete, 4.40t - Turbocharged | 1 |
N1-6-1 Timing Case, Camshaft & Gears, Ab Build
| 02***38 | Key | 1 |
| 02***41 | Hub | 1 |
| 02***42 | Plate | 1 |
N1-7-1 Flywheel, Ab Build
| 02***78 | Gear, Starter Ring | 1 |
| 02***70 | Bolt | 6 |
| 02***14 | Washer | 6 |
N1-5-1 Fans, Pulleys, & Fan Belt, Ab Build
| 02***79 | Screw | 3 |
| 02***57 | Spacer, Fan, 25.4mm | 1 |
| 02***14 | Pulley, Fan Drive | 1 |
N1-8-1 Engine Mountings, Ab Build
| 11***09 | Washer | 4 |
| 11***01 | Mounting, Metalastik | 2 |
| 12***01 | Bracket, Engine Mounting, Front, Left Hand | 1 |
N1-3-1 Block Assembly, Ab Build
| 02***01 | Thimble | 10 |
| 02***02 | Bolt | 10 |
| 02***07 | Plug, Core, D=50mm | 1 |
N1-4-2 Crankshaft, Bearings, Pistons & Con-Rods, Ab Build
| 02***38 | Key | 1 |
| 02***27 | Bolt | 2 |
| 02***28 | Nut | 2 |
N2-2-2 Rocker Assembly, Push Rods & Tappets, Ab Build
| 02***28 | Spring, Long | 2 |
| 02***29 | Spring, Short | 2 |
| 02***32 | Screw | 8 |
N2-4-1 Lifting Plates, Engine, Ab Build
| 02***16 | Plate, Lifting | 1 |
| 02***17 | Plate, Lifting | 1 |
| 02***37 | Bolt | 2 |
N2-3-1 Rocker Cover, Ab Build
| 02***90 | Spring | 1 |
| 02***69 | Bush | 3 |
| 02***39 | Cap, Oil Filler | 1 |
N2-1-2 Cylinder Head, Ab Build
| 02***24 | Collet | 8 |
| 02***95 | Plug, Taper | 2 |
| 02***20 | Bolt, Cylinder Head | 8 |
N3-2-2 Manifold, Exhaust, Ab Build
| 02***50 | Gasket | 2 |
| 02***22 | Gasket | 1 |
| 02***76 | Manifold, Exhaust | 1 |
N3-3-2 Filter, Air, Ab Build
| 12***00 | Hose, Induction Assembly | 1 |
| 12***00 | Filter, Assembly, Air | 1 |
| 13***4Z | Bolt, Bolt; To Secure The Diagonal Edge. Used To M602765 (926) And M608319 (930) | 4 |
N3-1-2 Manifold, Induction, Ab Build
| 02***07 | Gasket | 1 |
| 02***08 | Gasket | 1 |
| 02***09 | Gasket | 1 |
N3-4-2 Silencer, Ab Build
| 12***80 | Silencer | 1 |
| 13***8Z | Bolt, M10 X 30 | 3 |
| 14***8Z | Washer, Spring M10; Replaces 60***8r & 60***08, Replaces Luu0105-San 12222, Washer, Spring M10; Replaces 60***8r & 60***08, Replaces Luu0105-San 12222, Used On Outlet Adapter, Item 5. Also N524275 & 52***55, Washer, Spring M10; Replaces 60***8r & 60***08, Replaces Luu0105-San 12222, Used On Outlet Adapter, Item 5. Also M524275 & 52***55 | 3 |
N3-5-2 Silencer Extension, Ab Build
| 12***79 | Cap, Rain | 1 |
| 12***70 | Strut, Exhaust Support | 1 |
| 12***71 | Strut | 1 |
N4-4-1 Radiator & Hoses, Ab Build
| 12***01 | Cap, Coolant Filler, Double Seal, 7psi | 1 |
| 12***57 | Plug, & Overflow Tube | 1 |
| 12***74 | Plug | 1 |
N4-1-1 Pump, Water, Ab Build
| 02***80 | Pump, Water | 1 |
| 02***82 | O Ring | 1 |
| 02***83 | Seal | 1 |
N4-2-1 Thermostat, Housing, Inlet & Outlet, Ab Build
| 02***95 | Plug, Taper | 2 |
| 02***92 | Thermostat | 1 |
| 02***44 | Housing, Thermostat | 1 |
N4-3-1 Radiator, Fittings & Mountings, Ab Build
| 12***25 | Guard, Fan, Left Hand | 1 |
| 12***98 | Guard, Fan - Right Hand | 1 |
| 12***63 | Cowling, Fan | 1 |
N5-4-2 Filter, Oil, & Oil Feed Adaptor, Ab Build
| 02***73 | Element, Oil Filter, Canister Type - Long | 1 |
| 02***23 | Switch, Oil Pressure | 1 |
| 02***94 | Connector | 1 |
N5-1-1 Sump, Oil, Ab Build
| 02***60 | Gasket, Oil Sump | 1 |
| 02***66 | Bracket | 1 |
| 02***26 | Spacer | 1 |
N5-3-1 Piston Cooling Jets, Ab Build
| 02***15 | Jet, Piston Cooling | 4 |
| 02***98 | Valve | 4 |
| 02***97 | Retainer | 1 |
N5-2-2 Pump, Oil, & Relief Valve, Ab Build
| 02***61 | Shaft, Idler, Oil Pump | 1 |
| 02***28 | Circlip | 1 |
| 02***99 | Plunger | 1 |
N5-5-2 Cooler, Oil, Hose & Pipework, Ab Build
| 02***08 | Spring | 1 |
| 02***14 | Element, Cooling | 1 |
| 02***16 | O Ring | 2 |
N6-7-1 Start Pilot, Ab Build
| 02***76 | Adapter | 1 |
| 13***4Z | Bolt, Bolt; To Secure The Diagonal Edge. Used To M602765 (926) And M608319 (930) | 4 |
| 13***6Z | Bolt | 4 |
N6-3-2 Fuel System, Ab Build
| 02***87 | Damper, Vibration | 4 |
| 02***88 | Plate | 4 |
| 02***17 | Nut | 6 |
N6-1-2 Pump, Fuel Injection, Ab Build
| 02***00 | Seal | 1 |
| 02***01 | Wire | 1 |
| 02***02 | Sleeve | 1 |
N6-2-2 Injectors, Fuel, & Injection Pipes, Ab Build
| 02***53 | Washer | 4 |
| 02***81 | Washer | 8 |
| 02***90 | Bolt | 2 |
N6-4-1 Filter, Fuel, Ab Build
| 02***52 | Bracket, Mounting | 1 |
| 02***37 | Bolt | 2 |
| 02***59 | Nut | 2 |
N6-6-1 Filter, Fuel Sediment, Ab Build
| 20***00 | Filter, Assembly, Fuel Sediment | 1 |
| 20***01 | Head, Sediment Filter | 1 |
| 20***03 | Element, Assembly | 1 |
N6-5-1 Pump, Fuel Lift, Ab Build
| 02***80 | Gasket | 1 |
| 02***72 | Plate, Keep | 2 |
| 02***32 | Bolt, M8 X 20mm | 4 |
N7-1-1 Turbocharger, Ab Build
| 02***58 | Nut, Lock | 1 |
| 02***60 | Ring, Piston | 1 |
| 02***61 | Shaft, & Wheel Assembly | 1 |
N7-1-2 Turbocharger, Ab Build
| 02***22 | Gasket | 1 |
| 02***05 | Kit-Repair, Turbo | 1 |
| 02***08 | Housing, Centre Assembly | 1 |
N7-2-1 Turbo, Pipework, Ab Build
| 02***26 | Spacer | 1 |
| 02***75 | Gasket | 1 |
| 02***53 | Gasket | 1 |
N7-3-1 Pump, Vacuum, & Installation, Ab Build
| 02***35 | Gasket | 1 |
| 02***99 | Adapter | 1 |
| 02***00 | Pump, Vacuum | 1 |
N8-1-2 Gasket Sets, Ab Build
| 02***84 | Kit-Gasket, Top | 1 |
| 02***85 | Kit-Gasket, Bottom | 1 |
3CXT-4 A.D.M. serial number reference
Check the machine identification plate for the serial number and confirm applicability with a JCB dealer.
| Prefix | Identifies | Notes |
|---|---|---|
| 00337000-00399999 | JCB 3CXT-4 A.D.M. Backhoe Loader (MILITARY) |
Frequently asked questions
What engine does the JCB 3CXT-4 A.D.M. use?
The JCB 3CXT-4 A.D.M. uses a JCB DieselMax or EcoMAX 4-cylinder turbocharged diesel engine, with gross power ranging from 55 kW (74 hp) to 81 kW (109 hp) depending on the specific configuration.
What is the operating weight of the JCB 3CXT-4 A.D.M.?
The operating weight varies by configuration and series, ranging from 7,887 kg to 9,500 kg.
What model replaced the JCB 3CXT-4 A.D.M.?
The 3CXT-4 A.D.M. is part of the 3CX/4CX lineage, which has been succeeded by the modern 3CX PRO and 4CX PRO backhoe loaders featuring upgraded gearboxes, extended dipper sticks, and Command-Plus cabs.
What 3CXT-4 A.D.M. owners discuss
What are the known powertrain and hydraulic behaviors for the JCB 3CXT-4 A.D.M. regarding transmission shifting and shuttle valve operation?
The machine utilizes a powershift transmission with a hydraulic shuttle valve assembly actuated by two solenoids. Common operational issues include hesitation or jerking during take-up, failure to engage forward motion while reverse functions correctly, and inability to shift into 5th or 6th gears. Symptoms often involve the transmission overheating and the low-pressure warning light illuminating if the operator repeatedly attempts to move the machine while stuck. The shuttle valve may stick in the last engaged gear, preventing the gearshift stick from being pulled out of gear. Verification of solenoid operation involves checking for magnetic attraction on the solenoid body when the direction lever is engaged; lack of attraction indicates an electrical fault in the forward/reverse switch, relay, or wiring rather than a mechanical transmission failure.
What undercarriage and wear patterns are typical for this machine type?
The machine is equipped with Sitemaster brand tires in 12-ply construction, with front tire specifications of 11L-16 or 12-ply 14-17.5, and rear tires of 15.9-24 or 18.4x26 in 12-ply traction or industrial tread. Wear patterns include rapid tire degradation due to heavy-duty industrial applications. The drive system chain case requires periodic attention; pins and controls on attached implements (such as quick hitches) tend to loosen over time, requiring regular tightening to maintain operational integrity.
What engine quirks are associated with the JCB 3CXT-4 A.D.M. series?
The machine is powered by a JCB DieselMax 4-cylinder turbocharged diesel engine. Common issues include rough running, white smoke, and poor starting, which are often linked to injector faults and general wear in later engines. The common rail fuel systems are sensitive to fuel quality. Starting problems are frequent, particularly in cold weather, due to the high compression ratio requiring strong crank speed. Owners should verify battery voltage (at least 12.4V for 12V systems) to ensure reliable cranking. Unusual noises, such as deep rhythmic knocking that increases under load, indicate serious internal engine damage requiring immediate attention.
What are the common electrical and sensor issues reported by operators?
Electrical faults frequently mimic mechanical transmission failures. The forward/reverse lever operates microswitches that activate hydraulic solenoids; a faulty forward microswitch or inhibitor switch can prevent forward engagement or starting. Wiring issues include bridged wires on switches and white wiring harnesses that may degrade or short circuit. The master warning lamp may illuminate due to simple electrical faults or sensor readings, such as coolant sensor discrepancies. Operators should trace power flow through the fuse block (typically 5-amp fuses) and dump relay to isolate faults in the forward relay or solenoid connections.
What should be checked when buying a used 3CXT-4 A.D.M.?
Inspect the turbo exhaust housing for cracks, which is a known failure point. Check for hydraulic leaks, particularly from the extendahoe cylinder inside the boom and the valve block where swing does not hold position. Verify the brake master cylinder fluid level and type (ISO VG15). Test the forward and reverse solenoids for proper magnetic engagement. Check the torque converter filter for metal filings indicating internal wear. Ensure the gearshift stick moves freely and does not stick in gear. Verify the condition of the Sitemaster tires and check for play in the boom swing valve. Confirm the serial number matches the service manual range to ensure correct diagnostic procedures.
What fluid specifications and capacities are recommended for routine maintenance?
New machines are filled at the factory with JCB 10W/30 Multigrade engine oil. Recommended fluids include JCB branded oils verified for component protection, with equivalent alternatives allowed. The transmission requires JCB 10W special trans oil. Hydraulic system and axle housings require specific JCB-verified hydraulic fluids and lubricants. Grease points must be serviced according to the machine's lubrication chart. Coolant specifications must be verified against the factory data sheet for the specific serial range.
What safety-critical fixes require dealer verification?
Repairing cracked turbo exhaust housings, replacing faulty injector assemblies on the common rail system, and addressing deep rhythmic knocking indicative of internal engine damage require professional diagnosis and OEM parts. Verification of brake system integrity, including master cylinder fluid type and level, is critical for safe operation. Have your dealer verify the exact serial range applicability for service manuals and fluid specifications to ensure compliance with factory safety protocols.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific 3CXT-4 A.D.M. part?
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