| Parameter | Specification |
|---|---|
| Product Name | Hitachi External Wiring Harness / Engine-to-Chassis Interconnect Harness |
| Primary Part Number | 0001859 |
| Brand | COGENG (Premium Aftermarket Replacement) |
| Condition | Brand New, 100% Continuity & Dielectric Withstand Tested |
| Compatible Equipment | Hitachi EX200-3, EX220-3 Hydraulic Excavators |
| Engine Compatibility | Isuzu 6BD1 (Natural Aspirated), Isuzu 6BD1T (Turbocharged) |
| Harness Type | External Wiring Harness — Engine Compartment to Chassis/Cab Interconnect |
| Function | Transmits Control Signals and Power Between Engine ECU, Alternator, Starter Motor, and Operator Dashboard |
| Voltage Rating | 24V DC System |
| Wire Construction | Multi-Strand Copper Conductors; Cross-section Sized for Circuit Loads (Up to 150A for Starter Circuit) |
| Insulation | Heat-Resistant Material Rated -40°C to +125°C (Engine Zone); Resistant to Mineral Oils and Fuels |
| Connector Type | Industrial Waterproof Connectors, IP67 Rated |
| Protective Sheathing | Corrugated Tubing and/or Metal Channels for Mechanical Protection Along Routing Path |
| Routing | ECU (Engine) → Chassis Frame → Operator Cab Dashboard → 24V Batteries |
| Quality Assurance | 100% Continuity Test; Visual Inspection; Pre-Wired and Tested for Reduced Installation Time |
| Certification | ISO 9001 Certified Manufacturing Facility |
| Place of Origin | Guangdong, China |
| Supply Capacity | 500 Pieces per Month |
| Shipping Weight | Approx. 4.0 – 5.0 kg (Gross, Configuration Dependent) |
| Package Dimensions | Approx. 55 x 40 x 20 cm |
| Packing | Inner: PP Bag with Anti-Static Protection; Outer: Heavy-Duty Export-Grade Corrugated 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) |
| Shipping Mode | By Air, By Sea, By Express (FedEx, UPS, DHL, TNT, etc.) |
| Minimum Order Quantity | Acceptable Trial Order — Single Unit Orders Welcome |
| Return Policy | Non-Returnable / Non-Exchangeable (Comprehensive DOA Guarantee Included) |
The COGENG External Wiring Harness, part number 0001859, is a precision-manufactured electrical distribution harness engineered as a direct replacement for the Hitachi EX200-3 and EX220-3 hydraulic excavator platform. This harness serves as the primary electrical link between the engine compartment and the operator cab/chassis on Hitachi's EX-3 generation excavators.
The 0001859 harness is a critical component that integrates the electrical circuits required for engine operation and machine control. It provides the pathways for alternator charging (24V), starter motor command and direct power feed (up to 150A), engine sensor signals (temperature, oil pressure, coolant level), and control circuits for solenoid valves. It connects the Engine Control Unit (ECU) mounted on the engine to the operator's dashboard and the 24V battery system mounted on the chassis .
The construction of the COGENG 0001859 harness reflects the demanding requirements of heavy equipment operation. The conductors are multi-strand copper, sized appropriately for the specific current loads of each circuit. The insulation is selected for resistance to temperatures from -40°C to +125°C in the engine zone, and resistance to mineral oils and fuels. All connectors are industrial waterproof types rated IP67, providing protection against dust and moisture in the construction environment. The harness is routed with mechanical protection—corrugated tubing or metal channels—and includes branches for the alternator (B+, D+, W terminals), starter motor (relay command and direct feed), engine sensors (multiplexed circuits), indicator lamps, and multiple ground points .
Critical Compatibility Warning: This harness is specific to the Hitachi EX-3 series (EX200-3, EX220-3) with Isuzu 6BD1/6BD1T engines. It is not compatible with the later EX-5 or EX-6 series, which use different connectors and electrical architecture . It is also not a ZX-series harness.
The 0001859 harness is validated for the following Hitachi EX-3 series excavator models. Always provide your complete machine serial number and engine configuration for final compatibility verification.
| Brand | Model | Machine Class | Engine |
|---|---|---|---|
| Hitachi | EX200-3 | 20-Ton Hydraulic Excavator | Isuzu 6BD1 |
| Hitachi | EX220-3 | 22-Ton Hydraulic Excavator | Isuzu 6BD1T |
| Hitachi | EX210-3 | 21-Ton Hydraulic Excavator (Engine Variant Verification Required) | Isuzu 6BD1/6BD1T |
Note: Hitachi produced the EX-3 series in multiple electrical configurations. This harness is specific to models with Isuzu 6BD1/6BD1T engines. Verification with your chassis serial number and original part number is mandatory.
Complete External Wiring Harness Assembly (1 unit): The fully assembled, tested harness with all OEM-style waterproof connectors, terminals, protective conduit, and mounting clips pre-installed.
Sealed Connectors: Every branch is pre-terminated with the correct IP67-rated waterproof connectors for ECU, alternator, starter, sensors, and dashboard.
Protective Sheathing: Corrugated tubing and/or metal channel sections pre-applied for mechanical protection.
Mounting Clips and Retainers: OEM-style clips for routing along the chassis and engine compartment.
PP Bag Inner Packing and Export Carton: The harness is sealed in a PP bag with anti-static protection and flat-packed in a rigid, double-wall corrugated carton with protective foam.
EX-3 Series Specificity (Not EX-5/EX-6): The 0001859 harness is for the Hitachi EX-3 series (EX200-3, EX220-3). It is not compatible with the later EX-5 or EX-6 series, which use different connectors and electrical architecture . It is also not a ZX-series harness. If your machine is a ZX model, please provide the serial number for correct part identification.
Engine Configuration Verification: This harness is specific to machines equipped with the Isuzu 6BD1 (natural aspirated) or 6BD1T (turbocharged) engine. Hitachi produced the EX-3 series in multiple configurations; verification with your engine model and chassis serial number is essential .
Serial Number Verification is Mandatory: Hitachi implemented running production changes across the EX-3 series. Providing your complete machine serial number (chassis number) and the original part number from the existing harness (if legible) allows our technical team to verify the exact variant your machine requires.
Harness Section: The 0001859 is an external wiring harness (engine-to-chassis interconnect). It is not the internal cab harness or the complete machine harness. Please verify the specific section you are replacing.
Professional Installation Required: Installing an external wiring harness requires routing through the engine compartment and chassis, proper securing at all mounting points, and verification of all connections. Installation should be performed by a qualified heavy equipment technician with access to the Hitachi service manual.
Note: This is a summarized procedural guide. Always follow the Hitachi service manual for your specific model.
Step 1: Safety Lockout and Documentation
Disconnect negative (-) and positive (+) battery cables. Photograph every aspect of the existing harness routing, documenting all P-clip locations, routing through the engine compartment and chassis, and all connector orientations. Label every connector with numbered wire tags as it is disconnected.
Step 2: Old Harness Systematic Removal
Disconnect the ECU, alternator (B+, D+, W), starter motor (relay command and direct feed), engine sensors, and dashboard connectors. Remove the ring terminals from the battery and ground points. Cut zip ties, release P-clips, and carefully extract the old harness.
Step 3: New Harness Visual Comparison
Uncoil the new COGENG 0001859 harness beside the old harness. Compare connector types, branch lengths, and mounting clip positions. Verify every match before proceeding.
Step 4: New Harness Routing and Connection
Route the harness along the original path, securing at all P-clip locations. Connect the ECU, alternator, starter, sensors, and dashboard. Install and torque all power and ground terminals to OEM specifications. Verify adequate clearance from exhaust and moving components.
Step 5: Power-Up and Functional Test
Reconnect batteries. Start the engine and verify alternator charging (24V), starter operation, and sensor readings. Check all dashboard indicators. Confirm no active diagnostic trouble codes before releasing the machine to service.
| Detail | Description |
|---|---|
| Shipping Methods | By Air: Cost-effective for medium-weight orders. By Sea: Most economical for bulk orders. By Express (FedEx, UPS, DHL, TNT): Fastest door-to-door service. Method optimized based on cargo situation and destination. |
| Estimated Delivery Time | Express: 3-5 business days. Air Freight: 8-15 days. Sea Freight: 30-45 days. Transit times are carrier-dependent. Tracking provided within one business day of dispatch. |
| Packing | Inner: PP bag with anti-static protection. Outer: Heavy-duty export-grade corrugated carton box with custom-cut protective foam. |
| Payment Terms | Western Union, L/C, T/T, MoneyGram, D/A, D/P. Standard terms: 30% T/T deposit, 70% balance before shipment. |
| Minimum Order Quantity | Acceptable Trial Order — Single unit orders welcomed. |
| Policy Point | Terms |
|---|---|
| Merchant Return Policy | All sales are final. No returns or exchanges. A wiring harness cannot be restocked once departed from our controlled environment. |
| DOA Quality Guarantee | Full replacement for manufacturing defects reported within 7 days of delivery. Harness must be in original, uninstalled condition. |
| Pre-Shipment Confirmation | We send high-resolution photos of your exact harness for written approval before dispatch. |
Q1: Will this harness fit my Hitachi ZX200?
A: No. Part number 0001859 is for the EX200-3 and EX220-3 (EX-3 series) excavators. It is not compatible with the ZX series. Please provide your ZX model and serial number for correct part identification.
Q2: What models is this harness actually for?
A: This harness is for Hitachi EX200-3 and EX220-3 excavators equipped with Isuzu 6BD1 or 6BD1T engines .
Q3: What are the symptoms of a failing 0001859 harness?
A: Symptoms include charging system faults (alternator not charging), starter motor failure to engage, erratic sensor readings, dashboard warning lights, and visible damage such as broken wires, corroded connectors, or melted insulation.
Q4: Do you accept trial orders for a single unit?
A: Yes. We welcome trial orders for single units from first-time customers.
Q5: What certifications does COGENG hold?
A: COGENG is an ISO 9001 certified manufacturer.
For pricing, machine-down emergency support, trial orders, bulk quantity discounts, or pre-purchase compatibility verification, contact your COGENG supplier today.
Sales Price: Contact COGENG sales customer service for current competitive pricing.
Shipping Method & Cost: We will quote the optimal shipping solution based on your location and urgency.
Estimated Delivery Time: Based on the selected carrier. Tracking provided within one business day of dispatch.
✅ Verified Fitment — Hitachi EX200-3, EX220-3 (Isuzu 6BD1/6BD1T).
✅ External Wiring Harness — Engine-to-Chassis Interconnect.
✅ ISO 9001 Certified — 100% Continuity Tested, 500 Pieces Monthly Supply.
✅ Trial Orders Welcome — Single Unit Orders Accepted.
*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.
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