| Specification Category | Details |
|---|---|
| Compatible Equipment | Doosan Heavy Equipment (Compatible with OEM 4004501 applications) |
| COGENG Part Number | CG-DOOSAN-MWH05 |
| Replaces OEM Part Number | 4004501 |
| Product Name | Main Wiring Harness Assembly |
| Application | Central harness for engine control, sensors, solenoids, and monitoring systems |
| Wire Specifications | High-temperature XLPO insulation, oil/fuel/abrasion resistant |
| Connector Type | OEM-specified sealed connectors (IP67 equivalent) |
| Quality Assurance | 100% continuity, insulation resistance, and dielectric strength tested |
| Warranty | 2,000-hour limited warranty |
| NO | Number | Name | Qty |
| 1 | S-631 | WASHER;PLAIN | 3 |
| 2 | 3098706 | BRACE;WIRING | 1 |
| 3 | 3251659 | NUT | 3 |
| 4 | 3335571 | BRACE;WIRING | 1 |
| 5 | 3617958 | NUT | 1 |
| 6 | 3818060 | SCREW M10X1.5X25 | 3 |
| 7 | 3821783 | SCREW M8X1.25X20 | 5 |
| 8 | 3900627 | SCREW M6X1.0X14 | 3 |
| 9 | 4004501 | HARNESS | 1 |
| 10 | 4022870 | HARNESS | 1 |
Power Disconnection: Turn off the machine and disconnect the negative terminals of all batteries. Activate the main power disconnect switch if available, and allow at least 10 minutes for capacitors to discharge.
Documentation: Take clear photos or videos of the original harness routing, connector positions, and clamp locations to ensure accurate reinstallation.
Connector Handling: Release locking mechanisms carefully and pull connectors by their housings. Avoid tugging on wires to prevent terminal damage.
Inspection: Before installing the new harness, inspect all sensors, controllers, and mating connectors for corrosion, bent pins, or worn seals.
Routing: Follow the original harness path precisely, securing it in all clamps and guides. Ensure clearance from hot surfaces (e.g., exhaust components) and moving parts.
Verification: Confirm all connectors are fully seated and locked, with audible clicks. Double-check ground connections for tightness.
Testing: Reconnect batteries and power up the system. Check for diagnostic trouble codes and test all electrical functions before operational use.
Q: What are the symptoms of a failing wiring harness on a Cummins ISM, QSM, or M11 engine?
A: Common symptoms include intermittent engine performance issues, engine stalling or failure to start, multiple diagnostic trouble codes, erratic sensor readings, unresponsive throttle control, CAN bus communication errors between the engine ECU and machine controller, or specific engine functions not responding. Engine harness degradation is often accelerated by high heat exposure, vibration, and oil or fuel contamination at connector joints in the demanding engine compartment environment.
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