| Parameter | Details |
|---|---|
| Product Name | Chassis Wire Harness (As-Frame / Underhood Harness) |
| Part Numbers | 267-7969, 283-2932 (Also 2677969, 2832932) |
| Compatible Brands | Caterpillar (CAT) |
| Compatible Excavator Models | E324D, E325D (Also fits 324D, 325D variants) |
| Compatible Engine | CAT C7 / C6.6 |
| Harness Type | Chassis / Frame Harness (Undercarriage & Front Structure) |
| Material | Copper wire + PVC/TPE insulation + Rubber seals |
| Packing | PP bag inside, carton box outside |
| Payment Terms | Western Union, L/C, T/T, MoneyGram, D/A, D/P |
| MOQ | Acceptable trial order (1 piece accepted) |
| Shipping Mode | Air/Sea/Express (FedEx, UPS, DHL, TNT, etc.) |
| Place of Origin | Guangdong, China |
| Brand Name | COGENG |
| Certification | ISO9001 |
| Stock Status | ✅ In Stock |
| Supply Capacity | 500 PCS |
The COGENG 267-7969 / 283-2932 Chassis Wire Harness is a direct OEM replacement designed for Caterpillar E324D and E325D hydraulic excavators.
In the D-Series excavators, the electrical system is divided into three main parts:
Engine Harness (On the engine block)
Cab Harness (Inside the cab)
Chassis Harness (Below the cab, along the frame, and to the front attachment)
This product is the Chassis Harness. It acts as the central "backbone" connecting the cab to the engine bay and the hydraulic systems. It is critical for:
Power Distribution: Distributing 24V power from the batteries to the starter, alternator, and fuse panel.
Sensor Network: Relaying signals from the fuel tank, hydraulic tank, and swing system to the monitor.
Attachment Control: Wiring for the boom, stick, and bucket (excluding the extreme boom tip).
Given its location running along the swing frame and under the hydraulic tank, this harness is highly susceptible to chafing, corrosion from hydraulic fluid, and moisture ingress.
Manufactured under ISO9001 standards, the COGENG chassis harness uses 100% copper conductors (resists corrosion better than copper-clad aluminum), thick PVC insulation, and Deutsch-style IP67 connectors.
Why Choose COGENG?
267-7969 vs 283-2932: We supply the correct variant based on your machine serial number (S/N). *283-2932 is typically for 325D; 267-7969 typically for 324D.*
Plug-and-Play: Pre-terminated with OEM-matched connectors.
Durable: Resists oil, weather, and physical abrasion.
| Component | Quantity | Description |
|---|---|---|
| Main Chassis Trunk | 1 | Runs from cab bulkhead to front frame. |
| Battery Cables | 2 | Heavy gauge positive/negative leads. |
| Starter Trigger Wire | 1 | Signal wire to starter solenoid. |
| Alternator Harness | 1 | Connects alternator to battery and ECM. |
| Fuel Sender Extension | 1 | Connects to fuel tank top plate. |
| Hydraulic Temp Sender | 1 | For hydraulic oil temperature sensor. |
| Swing Brake Harness | 1 | For swing parking brake solenoid. |
| Chassis Ground Strap | 2 | Braided ground wires. |
| Mounting Clips | As needed | Factory-style push mounts. |
The layout of the Chassis Harness follows the "Swing Frame" from the rear battery box to the front turret.
Rear Battery Box Section (Bulkhead Connector):
Features: Heavy gauge lugs for battery disconnect switch.
Routing: Enters the rear frame from the battery box.
Hydraulic Tank & Swing Motor Section (Center Frame):
Connections: Swing brake solenoid, hydraulic oil level/temp sensors, main fuse block.
Risk Area: Commonly chafes against the hydraulic tank mounts.
Engine Flywheel Housing Section:
Connections: Starter motor (cranking circuit), alternator, engine ground.
Front Turret / Cab Floor Section:
Connections: Cab bulkhead connector (where it meets the Cab Harness), main control valve solenoids.
Boom Foot Section (The "Joint"):
Connections: Boom lighting, boom angle sensor, auxiliary piping harness.
Note: This section usually has a protective rubber bellows to allow boom movement.
Identifying the correct part number is critical.
*CAT Part Number 283-2932* is generally suited for E325D (Larger frame, longer routing).
*CAT Part Number 267-7969* is generally suited for E324D (Compact frame, shorter routing).
| Machine Model | Engine | Compatible COGENG Part | S/N Prefix (Examples) |
|---|---|---|---|
| E324D | C6.6 / C7 | 267-7969 | WFE, KXG |
| 324D | C6.6 / C7 | 267-7969 | EKD, FDH |
| E325D | C7 | 283-2932 | GLD, RDC |
| 325D | C7 | 283-2932 | GLE, RDD |
| 325D L | C7 | 283-2932 | DWF, RDE |
⚠️ Important: Please check your old harness part number before ordering. If the tag is missing, measure your machine's track frame length or provide your Serial Number to us for verification.
✅ Direct Fit For:
CAT 324D (Standard and L variants)
CAT E324D
CAT 325D (Standard, L, and LN variants)
CAT E325D
⚠️ Critical Installation Notes:
Battery Routing: Ensure the positive cable is routed away from the swing gear teeth. COGENG includes extra-heavy protective loom for this section.
Engine Ground: The chassis harness must have a clean, paint-free connection at the engine block ground (usually near the starter). A bad ground here will cause slow cranking or electrical feedback.
Hydraulic Tank: Before disconnecting the old harness, note where the harness clips are welded to the hydraulic tank. New routing must match exactly to avoid pinching.
❌ Not Compatible With:
CAT 330D / 336D (Completely different rear frame structure).
E320D (Smaller frame, uses 273-2841 or similar).
C-Series models (324C, 325C) – Electrical architecture is different (no Canbus for attachments).
Step 1: Preparation
Swing the upper structure 90 degrees to access the swivel joint area.
Disconnect batteries. Remove the rear battery box cover and floor plates.
Step 2: Removing the Old Harness
Label everything before cutting any zip ties.
Disconnect the bulkhead connector (large round connector behind the cab seat).
Disconnect the starter and alternator.
Follow the harness down to the swing motor. Remove the swing brake solenoid connector.
Trace the harness to the hydraulic tank (level and temp sensors).
Finally, trace to the boom foot. This usually involves opening a cover plate to access the junction block.
Step 3: Installing the New Harness
Routing: Start from the battery box and work towards the boom foot.
Grounds: Install the braided ground straps from the engine block to the frame, and from the frame to the cab. Clean the paint off these mounting points!
Securing: Use OEM-style plastic push mounts or heavy zip ties. Keep the harness away from the swing gear and rotating joint.
Step 4: Final Checks
Do not fully tighten the battery cables until the harness is fully seated.
Before starting the engine, turn the key to "ON" and check the monitor for:
Fuel level reading.
Hydraulic oil temperature reading (should be ambient).
Q1: What is the difference between the Chassis Harness and the Engine Harness?
A: The Engine Harness is bolted directly to the C7 engine (injectors, crank sensor). The Chassis Harness (this product) is bolted to the machine frame. They connect via a large 70-pin connector near the starter motor.
Q2: My 325D has a C9 engine. Will this fit?
A: No. This specific harness (267-7969/283-2932) is calibrated for the CAT C7 engine pinout (fuel delivery, cooling fan control). The C9 uses a different chassis harness layout.
Q3: Why does my warning light say "Hydraulic Oil Temp" after installing?
A: Usually a grounding issue. Ensure the sensor on the hydraulic tank is properly connected and that the chassis ground strap near the tank is tight and free of rust.
Q4: Do I need special software to install this?
A: No. This harness does not require ECU flashing. It is purely a power and signal distribution loom.
Q5: Is this a genuine CAT part?
A: No. COGENG is an aftermarket manufacturer (ISO9001). Our parts are built to OEM fit, form, and function.
Ordering Information
✅ In Stock – Ready to Ship.
✅ MOQ 1 piece accepted for trial orders.
📞 Contact COGENG supplier today to place your order!
*Shipping Details Delivery Return*
Sales Price:
The displayed price is for reference only. Please contact COGENG sales support for the exact price.
Shipping Method:
Sea, land, or air transport; the specific method is determined based on the nature of the shipment.
Estimated Delivery Time:
Based on the dispatch time from the logistics carrier; the displayed arrival time serves as the reference.
Contact information is provided at the bottom of the page.
Merchant Return Policy:
Products shipped are not eligible for return or exchange.
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