| Parameter | Specification |
|---|---|
| Product Name | Komatsu Excavator Engine Wiring Harness / Engine-to-ECU Interconnect Harness |
| Primary Part Numbers | 208-06-76831 (2080676831), 208-06-76830 |
| Brand | COGENG (Premium Aftermarket Replacement) |
| Condition | Brand New, 100% Continuity & Dielectric Withstand Tested |
| Compatible Equipment | Komatsu PC450-8, PC460-8, PC450LC-8, PC460LC-8 Hydraulic Excavators |
| Engine Compatibility | Komatsu SAA6D125E-5 (6-Cylinder, Common Rail, Tier 3) |
| Harness Type | Engine Wiring Harness — ECU, Injectors, Sensors, and Actuators Interconnect |
| Wire Insulation | Heat-Resistant Material Rated to 125°C (Engine Zone); Resistant to Oils and Fuels |
| Connector Systems | Sealed IP67 Connectors with Electromagnetic Shielding |
| Voltage Rating | 24V DC System |
| Environmental Sealing | IP67 Rated Connectors Against Dust and Moisture |
| Chemical & Abrasion Resistance | Resistant to Intense Vibration, High Temperatures, and Exposure to Oils and Fuels |
| Quality Assurance | 100% Automated Pin-to-Pin Continuity Mapping; Dielectric Withstand Test; Visual Inspection |
| Certification | ISO 9001 Certified Manufacturing Facility |
| Place of Origin | Guangdong, China |
| Supply Capacity | 500 Pieces per Month |
| Shipping Weight | Approx. 4.0 – 6.0 kg (Configuration Dependent) |
| Package Dimensions | 60 x 48 x 18 cm (Coiled and Flat-Packed in Protective Carton) |
| 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 (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 Engine Wiring Harness, identified by primary part numbers 208-06-76831 and 208-06-76830, is a precision-manufactured electrical distribution harness engineered as a direct, form-fit-function replacement for the Komatsu PC450-8 and PC460-8 hydraulic excavator platforms. These 45- to 46-ton class excavators belong to Komatsu's Dash-8 generation, machines deployed in large-scale construction, quarry, mining, and heavy infrastructure applications worldwide. This harness serves as the critical electrical link between the engine's Electronic Control Unit (ECU) and the engine-mounted components, including the common rail fuel injectors, temperature and pressure sensors, and various actuators .
The Komatsu SAA6D125E-5 engine, a 6-cylinder, 11.04L common rail diesel producing approximately 257 kW (345 HP), relies on this harness to transmit bidirectional electrical signals with millisecond precision . In modern common rail systems, each injector receives opening commands with exacting timing, while rail pressure sensors (operating at 1800-2000 bar) provide constant feedback to the ECU. The harness integrates separate circuits for high-current injector power supply (24V), sensor signals (coolant temperature, oil pressure, crankshaft speed, camshaft position), CAN bus communication with the ECU, solenoid valve power (EGR, variable geometry turbocharger), and safety circuits . Without a fully functional engine harness, the ECU cannot deliver precise control signals, resulting in engine derate, hard starting, poor performance, or complete shutdown.
The operating environment for an engine harness on a PC450-8 or PC460-8 is exceptionally severe. The harness is routed directly on the engine, exposed to intense vibration, high temperatures up to 125°C in the engine zone, and potential contact with engine oil and diesel fuel . The COGENG replacement harness is constructed with heat-resistant insulation, sealed IP67 connectors for dust and moisture protection, and electromagnetic shielding to eliminate interference . The harness is built to match OEM routing and connector positions for a drop-in installation.
The 208-06-76831 / 208-06-76830 harness is specifically designed for the Komatsu PC450-8 and PC460-8 excavator platforms. Always provide your complete machine serial number for final compatibility verification.
| Brand | Model | Machine Class | Engine |
|---|---|---|---|
| Komatsu | PC450-8 | 45-Ton Hydraulic Excavator | SAA6D125E-5 |
| Komatsu | PC460-8 | 46-Ton Hydraulic Excavator | SAA6D125E-5 |
| Komatsu | PC450LC-8 | 45-Ton Hydraulic Excavator (Long Crawler) | SAA6D125E-5 |
| Komatsu | PC460LC-8 | 46-Ton Hydraulic Excavator (Long Crawler) | SAA6D125E-5 |
Note: These models share a common Dash-8 generation electrical architecture with the SAA6D125E-5 engine . Verification with your machine's complete serial number (PIN), engine serial number, and old part number is mandatory.
Complete Engine Wiring Harness Assembly (1 unit): Fully assembled harness with all connectors, terminals, protective conduit sheathing, and identification labels pre-installed.
All Sensor, Injector, and Actuator Connectors: Every branch is pre-terminated with the correct sealed contacts and silicone wire seals.
High-Current Power and Ground Terminals: Heavy-gauge power cables terminated with appropriate ring terminals, sealed with heat shrink.
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 custom-cut protective foam and "Do Not Cut — Electrical Harness Inside" labels.
PC450-8 and PC460-8 Specificity: The 208-06-76831 / 208-06-76830 harness is designed for the Komatsu PC450-8 and PC460-8 excavator platforms with the SAA6D125E-5 engine. It is not compatible with the earlier PC450-7 or the later PC450-10 models, which utilize different electrical architectures and connector generations.
Part Number Relationship: The 208-06-76831 is the primary OEM part number, and 208-06-76830 is an alternative/superseding reference for the same engine harness family . Both are provided for cross-reference identification. Our technical team will verify the correct configuration for your specific machine serial number.
Serial Number Verification is Mandatory: Komatsu implemented running production changes within the Dash-8 series production run (2010-2015 for these models). Providing your complete machine serial number (PIN), engine serial number, and the old part number (if legible) allows our technical team to verify the exact harness variant your machine requires .
Engine Configuration: This harness is designed for the SAA6D125E-5 common rail engine. Verify your engine model before ordering.
Professional Installation Required: Installing an engine wiring harness requires routing through tight engine bay clearances, 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 Komatsu service manual and diagnostic software.
Note: This is a summarized procedural guide. Always follow the Komatsu 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 around the engine, and all connector orientations.
Step 2: Old Harness Systematic Removal
Label every connector with numbered wire tags as it is disconnected. Disconnect the ECU connector(s), all engine sensor connectors, injector pass-through, and actuator connectors. Cut zip ties, release P-clips, and carefully extract the old harness.
Step 3: New Harness Visual Comparison
Uncoil the new COGENG 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 following the photographic reference. Secure at all P-clip locations. Connect the ECU connector first. Systematically reconnect all sensor, injector, and actuator branches. Verify clearance from exhaust, turbo, and all moving components.
Step 5: Power-Up and Full Functional Test
Reconnect batteries. Connect Komatsu diagnostic software. Verify no active diagnostic trouble codes. Start the engine and verify immediate oil pressure. Monitor all parameters. Warm to operating temperature. Cycle all functions. Confirm zero fault codes after complete test.
| 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 for machine-down emergencies. |
| 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: What are the symptoms of a failing 208-06-76831 engine harness?
A: Common symptoms include multiple unrelated fault codes appearing simultaneously, intermittent engine derate or shutdown, erratic sensor readings, hard starting or no-start condition, visible chafing or melted insulation, green corrosion at connector backshells, and a successful "wiggle test" where manipulating the harness causes sensor values to drop out.
Q2: What is the relationship between 208-06-76831 and 208-06-76830?
A: These two part numbers are associated references for the same engine harness family on the PC450-8 / PC460-8 platform. The 208-06-76831 is the primary OEM number, and 208-06-76830 is an alternative/superseding reference . Our technical team will verify the correct configuration for your machine serial number.
Q3: Is this the complete machine harness or just the engine harness?
A: The 208-06-76831 / 208-06-76830 is an engine wiring harness. It connects the engine ECU to the engine-mounted sensors, injectors, and actuators. It is not the complete machine harness (cab harness and chassis harness are separate).
Q4: Do you accept trial orders for a single unit?
A: Yes, absolutely. We welcome trial orders for single units from first-time customers. Contact our sales team to arrange your trial order.
Q5: What certifications does COGENG hold?
A: COGENG is an ISO 9001 certified manufacturer, ensuring consistent manufacturing processes, rigorous inspection protocols, and full batch traceability.
*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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