| Feature / Attribute | Detail |
| Brand | COGENG |
| Part Number | 0001302 |
| Product Name | Wiring Harness / Electrical Wire Assembly |
| Application Model | Hitachi EX400-3 Excavator |
| Condition | Brand New / Direct OEM Replacement |
| Material Quality | High-temperature resistant copper wiring, flame-retardant outer sleeve, waterproof OEM-spec connectors |
| Function | Transmits electrical signals and power between the engine, hydraulic control valves, cabin monitor, and sensors |
| Availability | In Stock (Fast Worldwide Shipping Available) |
| Warranty / Testing | Function-tested and quality-inspected prior to shipment |
The COGENG 0001302 Wiring Harness is engineered specifically as a premium direct replacement electrical wire assembly for the Hitachi EX400-3 excavator. In heavy machinery operating under rigorous construction and mining conditions, the electrical system serves as the central nervous system. Over time, exposure to high engine temperatures, continuous vibration, moisture, and chemical agents (such as hydraulic oil and diesel) can cause standard wiring harnesses to become brittle, crack, or suffer from internal wire breaks.
COGENG’s replacement wiring harness is manufactured to strict OEM specifications to ensure seamless integration with your machine's existing electrical architecture. Utilizing high-conductivity copper strands, robust insulation sleeves, and factory-matched terminal connectors, this harness effectively prevents common electrical faults such as voltage drops, intermittent sensor signals, communication errors, and unexpected system shutdowns. Whether you are performing a full machine overhaul or repairing localized electrical damage, the COGENG 0001302 delivers the reliability, durability, and safety required to keep your Hitachi EX400-3 operating at peak productivity.
Main Engine Harness Section: Connects primary engine sensors (oil pressure, water temperature, fuel injection system components, and alternator).
Cab Interface Sub-Harness: Integrates the monitor panel, throttle control motor, key switch, and operator station controls.
Main Pump & Control Valve Harness: Manages solenoid valves, pressure sensors, and proportional control valves for smooth hydraulic operation.
Junction Connectors & Terminals: OEM-style multi-pin waterproof plugs (Deutsch/Sumitomo equivalent) designed to lock securely and block out moisture and dust.
Protective Sleeving: Corrugated split-tubing and braided high-temperature heat-resistant loom to protect internal wires from abrasion against the machine frame.
Mounting Brackets & Grommets: Factory-positioned rubber grommets and clips to secure the harness safely away from moving parts and sharp metal edges.
Due to text-based formatting, please refer to the structural schematic below for wiring layout orientation:
[ Operator Cab Controls ] <--- (Cab Sub-Harness) ---> [ Central Fuse & Relay Box ]
|
(Main Trunk Harness)
|
+-------------------------------------------------------+-------------------------------------------------------+
| | |
[ Engine Compartment ] [ Hydraulic Pump Area ] [ Chassis / Power Supply ]
- Oil Pressure Sensor - Solenoid Valves - Battery & Main Switch
- Water Temp Sensor - Proportional Valves - Alternator & Starter
- Throttle Motor - Pressure Transducers - Grounding Points
Hitachi EX400-3
Note on Compatibility: This harness is specifically tailored for the Hitachi EX400-3 series. Please verify your exact machine serial number and current part number with our customer service team prior to purchase to ensure a flawless fit.
Model Year Variations: Heavy equipment manufacturers occasionally make mid-production running changes to electrical pinouts or connector types based on serial number breaks. Always cross-reference your original equipment's part number or provide your machine serial plate details to our support team.
Controller Version: Ensure that your machine's ECU/controller matches the standard configuration for the Hitachi EX400-3 series to avoid communication mismatch issues.
Professional Installation: Due to the complex routing of heavy machinery wiring through tight chassis compartments, professional installation by a certified heavy equipment technician is strongly recommended.
Step 1: Power Disconnection: Disconnect the main battery switch and negative battery terminals to prevent short circuits during removal.
Step 2: Documentation & Labeling: Take clear photos and label each connector as you unplug it from sensors, switches, and controllers.
Step 3: Harness Extraction: Carefully release all mounting clips, zip ties, and rubber grommets securing the old harness to the frame. Pull the old harness out gently, avoiding sharp metal edges.
Step 4: New Harness Routing: Lay out the new COGENG 0001302 harness alongside the old one to verify branch lengths and connector types. Route the new harness along the exact factory pathway.
Step 5: Secure & Connect: Fasten all securing clips, grommets, and protective sleeves firmly. Plug in each connector until you hear a positive click, ensuring waterproof seals are properly seated.
Step 6: Testing: Reconnect the battery power, turn the key switch to the ON position (without cranking engine immediately) to check monitor functionality, sensor readings, and warning lights.
| Detail | Description |
| Shipping Methods | By Air, By Sea, By Express (FedEx, UPS, DHL, TNT, etc.). The specific arrangement will be based on the cargo situation and destination. |
| Estimated Delivery Time | Based on the shipping time of the logistics company. The arrival time shown by the carrier's tracking system shall prevail. |
| Packing | Inner: PP bag. Outer: Export-grade carton box with protective foam. |
| Payment Terms | Western Union, L/C (Letter of Credit), T/T (Telegraphic Transfer), MoneyGram, D/A (Documents against Acceptance), D/P (Documents against Payment) |
| Policy Point | Terms |
| Merchant Return Policy | Products shipped are not returnable or exchangeable. |
| Quality Guarantee | Every wiring harness and electrical component is inspected and continuity-tested before shipment to ensure it is fully functional and free of defects upon arrival. |
| Pre-Shipment Confirmation | Photos and testing videos can be provided upon request before shipment to confirm correct part numbers and physical condition. |
Q1: Is this an original OEM part or an aftermarket replacement?
A: The COGENG 0001302 is a direct OEM-spec replacement part built to match or exceed original equipment standards in durability, wire gauge, and connector quality.
Q2: How do I confirm compatibility with my excavator?
A: Please provide your specific machine model (Hitachi EX400-3) along with your machine serial number or old harness part number to our sales team for verification.
Q3: Can I request pictures before my order ships?
A: Yes! We can provide detailed photos and verification videos upon request prior to dispatch to ensure complete peace of mind.
Sales Price: Please contact COGENG sales customer service for specific pricing and bulk order discounts.
Shipping Method: The specific arrangement will be based on the cargo size, weight, and destination.
Estimated Delivery Time: Based on the shipping time of the logistics company; the arrival time shown by the carrier tracking system shall prevail.
Merchant Return Policy: The products shipped are not returnable or exchangeable. Please verify your part numbers carefully before ordering.
For pricing, bulk orders, or technical support, contact your COGENG supplier today.
Please provide your machine model and serial number for compatibility verification.
✅ Direct OEM Replacement.
✅ Durable — Built for Job Site Conditions.
✅ In Stock — Fast Shipping Worldwide.
*shipping Details Return Sales*
Sales price:
Please contact COGENG sales customer service for specific prices.
Shipping method:
The specific arrangement will be based on the cargo situation.
Estimated delivery time:
It is based on the shipping time of the logistics company, and the arrival time shown shall prevail.
Contact details are at the bottom.
MerchantReturnPolicy:
The products shipped are not returnable or exchangeable.
Contact COGENG
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