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207-06-76511 Main Wiring Harness for Komatsu PC350LC-8 PC300-8 PC350-8 Excavator
Restore reliable electrical performance to your Komatsu PC300 PC300-8 with the 207-06-76511 Main Wiring Harness. Built as a direct replacement for the original part, it matches the factory routing, connector layout and length, so it goes in where the old one came out.
Why This Harness Matters
Because it runs through the most exposed areas of the machine, the main harness takes more abuse than almost any other electrical part. Swinging, vibration, dust, washdowns and rodents all take their toll, which is why it is one of the most commonly replaced harnesses on older machines.
Laid out around the frame and through the house of the excavator, this harness is the long-distance carrier of the electrical system. It ties together the cab controls, controllers, pump and valve solenoids, sensors and lighting into one connected network.
Komatsu machines use monitor-based diagnostics, and a harness fault frequently appears as an error code that clears and returns. Replacing worn wiring is a common fix for these recurring codes.
Reducing Downtime
Electrical problems tend to get worse rather than better. Replacing a deteriorating harness at a planned service interval is far cheaper than dealing with a breakdown in the middle of a job, especially on remote sites.
Tips for a Smooth Installation
- Disconnect the battery isolator before starting.
- Work section by section, transferring clips and ties as you go, rather than removing the whole harness at once.
- Check every ground strap and clean its contact surface to bare metal.
- Test lights, horn, solenoids and the monitor before refitting covers.
Construction and Quality
TOPARTS harnesses are made to the original layout so that every connector reaches its component without strain. Protective conduit and tape guard the wires against abrasion, heat and oil in the engine bay and around the frame.
Replace or Repair?
A single visible fault is often a sign of wider ageing. Heat cycling and vibration affect every wire in the bundle, not just the one that failed. Fitting a new harness means you are not chasing the next fault next month.
Warning Signs to Watch For
Watch for these symptoms:
- Starting problems traced to wiring rather than the battery or starter
- Work lights, horn or wipers working only some of the time
- Rodent damage, crushed sections or wires worn through where the harness rubs the frame
- Monitor warnings that disappear when the machine is stopped
If these symptoms persist after checking fuses, batteries and grounds, the wiring itself is the next thing to suspect.
Part Information
- Part Name: Main Wiring Harness
- Part Number: 207-06-76511, 2070676511
- Condition: Aftermarket new
- Product Weight: 16 kg / 35.27 lbs
- Brand: TOPARTS
- Warranty: 3 months
- Feature: Original connector layout; plug-and-play installation
Application
Komatsu PC300, PC300-8, PC350-8, PC350LC-8, etc
Shipping and Payment
- Payment Method: PayPal, Stripe, Credit card, Visa, etc.
- Shipping Method: DHL, FedEx, UPS, TNT, USPS EMS, etc.
- Track Your Order: An email containing the tracking number with a link will be sent to you as soon as it ships.
Note: Please verify your part number and match our product pictures to your original item before ordering. If you have any questions, please feel free to contact us. Thanks.
