| Parameter | Specification |
|---|---|
| COGENG Part Number | 332/J3293 |
| OEM Equivalent | JCB 332/J3293 |
| Product Type | Engine Wiring Harness Assembly |
| Application | Engine electrical system |
| Harness Type | Complete engine bay harness |
| Compatible Models | JCB 3CX, 4CX Backhoe Loaders |
| Brand | Part Number |
|---|---|
| COGENG | JCB332/J3293 |
| JCB | 332/J3293 |
| Interchange | 332/J3294, 332/J3295, 320/08988, 320/08989, 332/K4730 (similar but different) |
| Parameter | Specification |
|---|---|
| System Voltage | 24V DC (JCB standard for 3CX/4CX) |
| Current Capacity | Up to 50A (main power circuits) |
| Wire Gauge Range | 14AWG - 20AWG (signal) / 8AWG - 12AWG (starter/alternator) |
| Insulation Resistance | ≥100MΩ @ 500V DC |
| Dielectric Strength | 1500V AC/60s No Breakdown |
| Voltage Drop | <0.5V @ rated load |
| Temperature Rating | -40°C to +125°C (engine bay rated) |
| Component | Material Specification |
|---|---|
| Conductor | High-purity tinned copper (99.9%) |
| Wire Insulation | Heat-resistant XLPE / PVC (125°C rated) |
| Outer Wrapping | Automotive-grade cloth tape / Corrugated conduit |
| Connector Housings | OEM-grade Nylon 66 / PBT (UL94 V-0) |
| Terminals | Tin-plated / Gold-plated brass |
| Grommets/Bushings | EPDM Rubber (UV resistant) |
| Shielding | Aluminum foil + copper braid (sensor circuits) |
| Identification | Heat-shrink printed circuit labels |
| Diesel-resistant jacketing | Special compound for engine bay |
| Parameter | Rating |
|---|---|
| Temperature Range | -40°C to +125°C |
| Ingress Protection | IP67 (engine connectors) |
| Vibration Resistance | 15G @ 50-1000Hz |
| UV Resistance | 500+ hours weatherometer |
| Chemical Resistance | Resists diesel, oil, hydraulic fluid, coolant |
| Abrasion Resistance | Corrugated conduit in high-wear areas |
| Model | Series | Engine | Typical Application |
|---|---|---|---|
| 3CX | Standard | JCB Dieselmax / Perkins | Engine harness |
| 3CX Super | Super | JCB Dieselmax | Engine harness |
| 3CX Plus | Plus | JCB Dieselmax | Engine harness |
| 3CX Xtra | Xtra | JCB Dieselmax | Engine harness |
| 3CX Eco | Eco | JCB Dieselmax | Engine harness |
| Model | Series | Engine | Typical Application |
|---|---|---|---|
| 4CX | Standard | JCB Dieselmax | Engine harness |
| 4CX Super | Super | JCB Dieselmax | Engine harness |
| 4CX Plus | Plus | JCB Dieselmax | Engine harness |
| 4CX Xtra | Xtra | JCB Dieselmax | Engine harness |
| Engine Model | Displacement | Cylinders | Fuel System | Found In |
|---|---|---|---|---|
| JCB Dieselmax 444 | 4.4L | 4-cylinder | Common Rail | 3CX, 4CX (most) |
| JCB Dieselmax 448 | 4.8L | 4-cylinder | Common Rail | 3CX, 4CX (larger) |
| Perkins 1104D-44 | 4.4L | 4-cylinder | Common Rail | 3CX (early models) |
| Perkins 1104C-44 | 4.4L | 4-cylinder | Mechanical/Common Rail | 3CX (older) |
Note: Verify engine model with your equipment manual before ordering. Contact COGENG with your machine serial number for exact compatibility confirmation.
| Circuit Type | Components Connected | Wire Specification | Shielding |
|---|---|---|---|
| Engine Control (ECU) | Main ECU, crank sensor, cam sensor | Shielded 18-20 AWG | Yes |
| Fuel System | Injectors (4), fuel pump, pressure sensors | 14-16 AWG + shield | On sensors |
| Air Intake | Turbo actuator, MAF sensor, boost sensor | 18-20 AWG shielded | Yes |
| Exhaust / Aftertreatment | EGR valve, DPF sensors (if equipped), temp sensors | 18-20 AWG shielded | Yes |
| Cooling System | Fan motor, coolant temp sensor, fan clutch | 14-16 AWG (fan) + 20 AWG (sensor) | No |
| Charging System | Alternator, starter motor, battery connections | 8-10 AWG (alternator) / 4-6 AWG (starter) | No |
| Engine Sensors | Oil pressure, fuel temp, coolant temp, water in fuel | 18-20 AWG shielded | Yes |
| Connector Type | Location | Pins | Sealing |
|---|---|---|---|
| JCB OEM | Engine control unit (ECU) | 48-60 pin | IP67 |
| Injector Harness | Valve cover | 2-pin per injector | IP67 |
| Deutsch DT | Sensors, actuators | 2-4 pins | IP67 |
| AMP/Tyco | Alternator, starter | 2-pin + ring terminal | IP65 |
| Crank/Cam Sensor | Engine block | 3-pin | IP67 |
| Coolant Temp | Thermostat housing | 2-pin | IP67 |
| Oil Pressure | Engine block | 2-pin | IP67 |
| Water in Fuel Sensor | Fuel filter housing | 2-pin | IP67 |
| Feature | Benefit |
|---|---|
| OEM-Grade Materials | JCB-spec wire, terminals, connectors |
| Exact Routing | Pre-formed to match factory engine routing |
| Color-Coded Wires | JCB-standard wire colors |
| Labeled Connectors | Circuit identification at every connector |
| 100% Tested | Every harness individually tested |
| Shielded Circuits | Critical sensor circuits fully shielded |
| Diesel-Resistant Jacketing | Withstands diesel, oil, coolant |
| High-Temp Wire | 125°C rated for engine bay (3CX/4CX) |
| Test | Standard | Acceptance Criteria |
|---|---|---|
| Continuity Test | 100% | Zero opens |
| Insulation Resistance | 500V DC | ≥100MΩ |
| Dielectric Withstand | 1500V AC/60s | No breakdown |
| Voltage Drop | At rated load | <0.5V per circuit |
| Connector Insertion | OEM standard | Within spec |
| Terminal Retention | OEM standard | ≥50N |
| Shield Continuity | 100% | <1Ω |
| High-Temp Exposure | 125°C / 1000 hrs | No degradation |
✅ ISO 9001:2015 – Quality Management System
✅ IATF 16949 – Automotive-grade quality (wire harness standard)
✅ RoHS Compliant
✅ REACH Compliant
| NO | Number | Name | Qty |
| 1 | 332/J3293 | Harness Main | 1 |
| 2 | 721/ 10453 | Harness Boom Working Lights | 1 |
| 3 | 332/J0670 | Switch Upper Servo Pressure 12bar | 1 |
| 4 | 1316/0507D | Setscrew M12 x 25 grade 10.9 | 1 |
| 5 | 1411/0005D | Washer | 1 |
| 8 | JHR0128 | Bolt | 3 |
| 9 | 701/80328 | Switch Overheat Warning | 1 |
| 10 | 716/30129 | Sensor Temperature | 1 |
| 11 | KAR0016 | Tie Cable | 8 |
| 13 | 826/01347 | Tie Cable 160mm | 41 |
| 15 | KHR1451 | Cable Earth | 1 |
| 17 | KHR1716 | Cap Terminal | 3 |
| 18 | KHR1407 | Clamp 25mm | 2 |
| 22 | 715/04300 | Socket Beacon | 2 |
| 23 | KHR1444 | Clamp 12mm dia. | 2 |
| 25 | 270/00106 | Tie Cable 385mm | 28 |
| 26 | 826/ 11447 | Tie Cable Locking | 14 |
| 28 | KHR0737 | Screw Pan Head | 17 |
| 30 | KHR1588 | Clip | 2 |
| 31 | JHR0174 | Relay 24 volt | 1 |
| 32 | JHR0162 | Cable battery lead clamp and cover | 1 |
| 33 | JNR0055 | Cable battery relay to starter motor | 1 |
| 34 | 332/J0669 | Switch Low Pressure 5bar 1/4" BSP | 1 |
| 35 | 332/J0671 | Switch Travel Pressure 20 bar | 2 |
| 36 | 332/J2971 | Switch high pressure 298 bar 1/4" BSP | 1 |
| 37 | 718/20026 | Cable battery positive to battery relay | 1 |
| 38 | 718/56074 | Cable battery negative | 1 |
| 39 | 721/ 11004 | Harness link | 1 |
| 40 | 332/K8180 | Boot Rubber | 2 |
Pre-Installation Protocol:
Park backhoe loader on level ground, lower boom and stabilizers completely
Engage parking brake and implement all safety locks
Turn ignition key to OFF position and remove
Disconnect negative (-) battery terminal first, then positive (+)
Wait 10 minutes for ECU capacitors to discharge
Identify and tag all existing engine harness connections
Installation Steps:
Photograph entire existing engine harness routing and connections
Label each connector with corresponding component identification
Use appropriate terminal release tools - never pull on wires
Carefully release all engine harness clamps and mounting points
Compare new COGENG harness with original for exact match
Route harness following exact original path documentation
Secure all mounting clamps and retention points properly
Connect all engine sensors and components first
Engage ECU and main power connections last
Verify all connector locks engage with positive click
Ensure adequate slack at engine movement points
Post-Installation Testing:
Reconnect battery terminals (positive first, then negative)
Turn key to ON position (do not start) for system initialization
Check for diagnostic trouble codes
Start engine and monitor for proper operation
Verify all sensor readings and system communications
Test under actual operating conditions
Contact COGENG
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