| Parameter | Specification |
|---|---|
| Product Name | Caterpillar Engine Wiring Harness / Engine-to-ECM Interconnect Harness |
| Primary Part Numbers | 259-5068 (2595068), 275-6732 (2756732) |
| Brand | COGENG (Premium Aftermarket Replacement) |
| Condition | Brand New, 100% Continuity & Dielectric Withstand Tested |
| Compatible Equipment | Caterpillar 345C, 345C L, 345C MH Hydraulic Excavators |
| Engine Compatibility | Caterpillar C13 ACERT Diesel Engine |
| Harness Type | Engine Wiring Harness — ECM, Injectors, Sensors, and Actuators Interconnect |
| Wire Insulation | Cross-Linked Polyethylene (XLPE) with PTFE Overwrap in High-Temperature Zones; SAE J1128 Type SXL/GXL; Rated -40°C to +125°C |
| Connector Systems | Deutsch DT, Deutsch DTM, Deutsch HD30, Ampseal 16, Integrated ECM Connector with Gold-Plated Terminals |
| Protective Sheathing | High-Temperature Corrugated Nylon Split-Loom Conduit; Self-Fusing Silicone Tape at All Branch Junctions; Adhesive-Lined Dual-Wall Heat Shrink Boots at All Connector Backshells; Reflective Aluminized Fiberglass Sleeving in Exhaust Proximate Zones |
| Voltage Rating | 24V DC System |
| Environmental Sealing | IP67 Rated Mated Connectors with Silicone Interfacial Seals, Peripheral Gaskets, and Cavity Plugs in All Unused Positions |
| Chemical & Abrasion Resistance | Resistant to Diesel Fuel, Engine Oil, Hydraulic Fluid, Engine Coolant, and Commercial Degreasing Solvents; Exceeds SAE J1128 Abrasion Standards |
| Quality Assurance | 100% Automated Pin-to-Pin Continuity Mapping Against OEM Schematic; Dielectric Withstand Test; Computer-Monitored Crimp Force Recording; 10x Magnification Visual Inspection |
| Certification | ISO 9001 Certified Manufacturing Facility |
| Place of Origin | Guangdong, China |
| Supply Capacity | 300 Pieces per Month |
| Shipping Weight | Approx. 4.0 – 6.0 kg (Configuration Dependent) |
| Package Dimensions | 62 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, T/T, MoneyGram, D/A, D/P |
| Shipping Mode | By Air, By Sea, By Express (FedEx, UPS, DHL, TNT) |
| 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 259-5068 (2595068) and 275-6732 (2756732), is a precision-manufactured electrical distribution harness engineered as a direct, form-fit-function replacement for the Caterpillar 345C hydraulic excavator equipped with the C13 ACERT diesel engine. The 345C is a 45-ton class excavator from Caterpillar's C-Series generation, a machine widely deployed in large-scale construction, quarry, mining, and heavy infrastructure applications worldwide.
The Caterpillar C13 ACERT engine is a 12.5-liter, inline six-cylinder, electronically controlled diesel powerplant that relies on precise electronic management of fuel injection, turbocharging, and emissions systems. The 259-5068 / 275-6732 harness is the physical electrical infrastructure that connects the Engine Control Module (ECM) to the full suite of engine-mounted components. It carries precision analog signals from oil pressure, coolant temperature, intake manifold pressure and temperature, fuel pressure and temperature, and atmospheric pressure sensors. It transmits high-frequency digital pulse trains from the camshaft and crankshaft position sensors. It delivers the precisely timed, high-current drive signals to the fuel injectors and various actuator solenoids. And it maintains the bidirectional CAN bus data link between the engine ECM and the machine's other control modules.
The operating environment for an engine harness on a 345C excavator is exceptionally severe. The harness is routed directly on the engine, exposed to continuous high-amplitude vibration, extreme thermal cycling from cold starts to sustained operating temperatures exceeding 100°C, and potential contact with hot engine oil, diesel fuel, coolant, and exhaust gases. It must survive exposure to high-pressure water jetting during cleaning and the constant assault of abrasive dust, mud, and moisture.
The failure modes of the OEM harness are well-documented: heat-induced insulation embrittlement and cracking, moisture ingress causing copper corrosion and increased circuit resistance, fretting corrosion at connector pins causing intermittent signal loss, and chafing damage at engine contact points causing short circuits. COGENG's 259-5068 / 275-6732 aftermarket harness is engineered to overcome these failures using premium XLPE-insulated wire rated for 125°C continuous operation, multi-layer thermal shielding in exhaust-proximate zones, self-fusing silicone tape at every branch junction for permanent waterproof sealing, and precision-machined gold-plated connector contacts to prevent fretting corrosion. Every terminal is solid-barrel and crimped using computer-monitored presses. The harness is built on a precision OEM jig for guaranteed drop-in fit.
The 259-5068 / 275-6732 harness is designed for the Caterpillar 345C excavator platform with the C13 engine. Always provide your complete machine PIN and engine serial number for final compatibility verification.
| Brand | Model | Machine Class | Engine |
|---|---|---|---|
| Caterpillar | 345C | 45-Ton Hydraulic Excavator | C13 ACERT |
| Caterpillar | 345C L | 45-Ton Hydraulic Excavator (Long Undercarriage) | C13 ACERT |
| Caterpillar | 345C MH | 45-Ton Material Handler | C13 ACERT |
Note: These models share a common C-Series generation electrical architecture with the C13 engine. Verification with your machine's complete PIN and engine serial number is mandatory.
Complete Engine Wiring Harness Assembly (1 unit): Fully assembled, jig-built harness with all connectors, solid-barrel terminals, protective conduit sheathing, thermal shielding layers, factory-positioned P-clips, and identification labels pre-installed.
Integrated ECM Connector Assembly: The primary ECM connector body with all gold-plated terminals, silicone interfacial seal, and adhesive-lined heat shrink strain relief boot pre-installed.
All Sensor, Injector, and Actuator Connectors: Every branch is pre-terminated with the correct solid-barrel contacts, silicone wire seals, and plastic cavity plugs in unused positions.
High-Current Power and Ground Terminals: Heavy-gauge power cables terminated with tin-plated, closed-barrel copper ring terminals, each sealed with dual-wall adhesive-lined 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.
345C and C13 Engine Specificity: The 259-5068 / 275-6732 harness is designed for the Caterpillar 345C excavator platform with the C13 ACERT engine. It is not compatible with the earlier 345B or the later 345D, 345D2 models, which utilize different engine platforms and electrical architectures.
Part Number Relationship: The 259-5068 and 275-6732 are associated references for this engine harness application. They may represent production revisions, a supersession, or specific machine configuration variants. Our technical team will verify the correct configuration for your machine serial number.
Serial Number Verification is Mandatory: Caterpillar implemented running production changes within the C-Series production run. Providing your complete machine PIN and engine serial number (ESN) allows our technical team to verify the exact harness variant your machine requires.
Engine Harness Section: The 259-5068 / 275-6732 is an engine wiring harness. It connects the engine ECM to the engine-mounted sensors, injectors, and actuators. It is not the chassis harness or the complete machine harness. Please verify the specific section you are replacing 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 Caterpillar Electronic Technician (ET) diagnostic software.
Note: This is a summarized procedural guide. Always follow the Caterpillar 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 ECM 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 ECM connector, branch lengths, connector types, 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 ECM 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 Caterpillar Electronic Technician (ET). 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 259-5068 / 275-6732 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 259-5068 and 275-6732?
A: These two part numbers are associated references for this engine harness application on the 345C with C13 engine. They may represent production revisions or configuration variants. 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 259-5068 / 275-6732 is an engine wiring harness. It connects the engine ECM to the engine-mounted sensors, injectors, and actuators. It is not the complete machine harness (chassis harness and cab 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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