| Parameter | Specification |
|---|---|
| Product Name | Caterpillar Excavator Chassis Wiring Harness / Main Frame Harness |
| Primary Part Number | 275-6846 (2756846) 267-7964 |
| Brand | COGENG (Premium Aftermarket Replacement) |
| Condition | Brand New, 100% Continuity & Dielectric Withstand Tested |
| Compatible Equipment | Caterpillar 324D, 325D Hydraulic Excavators |
| Harness Type | Chassis Wiring Harness — Main Frame, Engine-to-Cab 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/Controller Connectors 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 / IP69K 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 | 4.0 kg (Gross, approximate) |
| 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 (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 Chassis Wiring Harness, part number 275-6846 (2756846), is a precision-manufactured, comprehensive electrical distribution harness engineered as a direct, form-fit-function replacement for the Caterpillar 324D and 325D hydraulic excavator platforms. These 24- to 25-ton class excavators belong to Caterpillar's D-Series generation, machines widely deployed in construction, quarry, demolition, utility, and heavy infrastructure applications worldwide.
This harness is the main chassis wiring harness, providing the complete electrical pathways that route along the machine's main frame between the engine compartment, the hydraulic system, the swing frame, and the operator cab. It carries power distribution, sensor signals, actuator control commands, and communication data between the machine's Electronic Control Modules (ECMs) and the various subsystems. A damaged or degraded chassis harness can cause a wide range of symptoms, from intermittent fault codes and sensor errors to loss of hydraulic control, engine derate, or complete electrical failure.
The Caterpillar 324D and 325D utilize a sophisticated electronic control architecture that coordinates engine power output, hydraulic pump displacement, and valve spool positioning for optimal productivity and fuel economy. The 275-6846 harness is the physical infrastructure that makes this intelligent control possible. It carries precision analog signals from pressure sensors on the main hydraulic pumps, temperature sensors in the engine and hydraulic oil circuits, and position sensors throughout the machine. It transmits digital data between the engine ECM, the pump controller, and the operator's monitor panel via the CAN bus data link. It delivers the precisely modulated drive signals to the electro-proportional solenoid valves that control pump displacement, swing priority, travel straight-line compensation, and auxiliary hydraulic flow.
The operating environment for a chassis harness in a 324D or 325D excavator is exceptionally severe. The harness must route along the main frame, where it endures constant flexing and vibration as the machine articulates and the upper structure rotates. It must pass through the engine bay, where radiant heat from the exhaust manifold and turbocharger bakes the wire insulation. It must survive exposure to high-pressure water jetting, diesel fuel and hydraulic oil mist, and the chemical assault of degreasing solvents. It is subjected to continuous, high-amplitude vibration and the shock loads transmitted through the machine frame during digging, lifting, and hammer operation.
COGENG's 275-6846 aftermarket harness is manufactured using premium XLPE-insulated wire with a high temperature rating, providing superior resistance to thermal aging, cut-through, and chemical degradation. At every branch junction, we implement a three-stage environmental sealing protocol: PTFE tape underlayer, self-fusing silicone tape that cures into a solid waterproof barrier, and adhesive-lined dual-wall heat shrink for structural strain relief. Every connector terminal is solid-barrel and crimped using computer-calibrated presses. The harness is built on a precision jig that duplicates the exact OEM routing, branch lengths, and connector positions. Installation is a true drop-in replacement: no cutting, splicing, or adapting is necessary.
The 275-6846 harness is specifically designed for the Caterpillar 324D and 325D excavator platforms. Always provide your complete machine PIN and serial number for final compatibility verification.
| Brand | Model | Machine Class |
|---|---|---|
| Caterpillar | 324D | 24-Ton Hydraulic Excavator |
| Caterpillar | 324D L | 24-Ton Hydraulic Excavator (Long Undercarriage) |
| Caterpillar | 325D | 25-Ton Hydraulic Excavator |
| Caterpillar | 325D L | 25-Ton Hydraulic Excavator (Long Undercarriage) |
Note: These models share a common D-Series generation electrical architecture. Verification with your machine's complete PIN is mandatory.
Complete Chassis Wiring Harness Assembly (1 unit): Fully assembled, jig-built harness with all connectors, solid-barrel terminals, protective conduit sheathing, factory-positioned P-clips, and identification labels pre-installed.
Integrated ECM/Controller Connector Assembly: The primary connector body with all gold-plated terminals, silicone interfacial seal, and adhesive-lined heat shrink strain relief boot pre-installed.
All Sensor, Actuator, and System Connectors: Every branch is pre-terminated with solid-barrel contacts, silicone wire seals, and plastic cavity plugs in unused positions. Connector types include Deutsch DT, DTM, HD30, and Ampseal 16.
High-Current Power and Ground Terminals: Heavy-gauge alternator, starter motor, and battery 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.
324D and 325D Specificity: The 275-6846 harness is designed for the Caterpillar 324D and 325D excavator platforms (D-Series generation). It is not compatible with the earlier C-Series (324C, 325C) or the later E-Series (324E, 325E) models, which utilize different electrical architectures and connector generations.
Chassis Harness Section: The 275-6846 is a main chassis harness. It is not the engine harness, the cab harness, or the complete machine harness. Please verify the specific harness section you are replacing before ordering.
Serial Number Verification is Mandatory: Caterpillar implemented running production changes within the D-Series production run. Providing your complete machine PIN allows our technical team to verify the exact harness variant your machine requires.
L Variant Compatibility: This harness is typically compatible with the 324D L and 325D L long undercarriage variants. These machines share the same D-Series electrical architecture as the standard models. However, verification with your machine's PIN is recommended.
Professional Installation Required: Installing a chassis wiring harness on an excavator is a labor-intensive procedure requiring methodical routing along the main frame, through the swing frame, and into the engine bay and cab. 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 along the main frame, through the swing frame, and all connector orientations.
Step 2: Old Harness Systematic Removal
Label every connector with numbered wire tags as it is disconnected. Disconnect the controller connector(s), all sensor connectors, hydraulic solenoid connectors, and chassis interface 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 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 and standoff locations. Connect the controller connector first. Systematically reconnect all sensor, actuator, and hydraulic system connectors. Install and torque all power and ground ring terminals to OEM specifications. Verify clearance from exhaust, turbo, and all moving parts.
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 hydraulic functions, swing, and travel. 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 275-6846 chassis harness?
A: Common symptoms include multiple unrelated fault codes appearing simultaneously, intermittent controller communication loss, specific hydraulic functions becoming slow or inoperative, the monitor display flickering or losing data, random engine derate or shutdown, 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: Will this harness fit both my 324D and 325D?
A: Yes. The 275-6846 harness is validated for the 324D and 325D excavator platforms. These machines share a common D-Series generation electrical architecture. However, we always verify your specific machine PIN during pre-shipment confirmation.
Q3: Is this the complete machine harness or just the chassis harness?
A: The 275-6846 is a main chassis harness. It connects the controllers to the engine and hydraulic system sensors and actuators along the main frame. It is not the complete machine harness (cab harness and engine 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.
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 directly for the most current competitive pricing. Trial orders welcome.
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.
✅ Direct OEM Replacement — Jig-Built for Guaranteed Fit, No Cutting or Splicing Required.
✅ Caterpillar 324D & 325D Compatible — Chassis Harness, 275-6846.
✅ ISO 9001 Certified — 100% Continuity Tested, 300 Pieces Monthly Supply.
✅ Trial Orders Welcome — Single Unit Orders Accepted.
✅ In Stock & Ready to Ship — Minimize Excavator Downtime with Immediate Worldwide Dispatch.
Critical Action: To ensure 100% compatibility, please provide your Caterpillar excavator's complete model and PIN. A photo of your existing harness label and connector face is recommended. Our technical team will cross-reference your machine's exact configuration and provide written confirmation before you order.
Merchant Return Policy: All products shipped are not returnable or exchangeable. Please complete all compatibility checks before purchase.
*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
📞 Phone: +86-185-2913-1515 🌐 Instagram
📧 Email: hugo@cogeng.net 🌐 Facebook：Excavator Parts Selection and Replacement Community
💬 WhatsApp +86-185-2913-1515 Facebook: Excavator Wiring Harness
💬 WeChat: +86-185-7865-1106 Facebook: Excavator Wire Harness
🌐 Website: cogeng.net Facebook: Excavator SolenoidValve
Excavator Solenoid Valve Excavator Wiring Harness Excavator Seal Kit
Excavator Pressure Sensor Excavator Revolution Sensor Excavator Water Temp Sensor
Excavator Control Panel Excavator Switch Parts Excavator Motors
Excavator Hydraulic Pump Excavator Other parts Excavator Engine Oil
