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207-06-68131 207-06-61150 External Harness for Komatsu Excavator PC300-6 PC350-6
Keep your Komatsu PC300-6 PC350-6 working with the TOPARTS 207-06-68131 207-06-61150 External Harness. It replaces the original harness one-for-one and is built for the vibration, heat and dirt that come with daily work on site.
Specs at a Glance
- Part Name: External Harness
- Part Number: 207-06-68131, 207-06-61150, 2070668131, 2070661150
- Condition: Aftermarket new
- Product Weight: 15 kg / 33.07 lbs
- Brand: TOPARTS
- Feature: Quality checked before shipping; built for heavy-duty use
Compatible Models
Komatsu PC300-6 PC350-6
What This Harness Does
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.
Where the engine harness serves the engine, the external or main harness serves the whole machine. It connects the major systems of the excavator, so when it is damaged the symptoms can appear in places that seem unrelated: lights, gauges, solenoids, starting and more.
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.
How to Tell It Is Time for a New One
Typical signs include:
- Several unrelated circuits failing at once
- Monitor warnings that disappear when the machine is stopped
- Blown fuses that keep recurring with no obvious cause
- Work lights, horn or wipers working only some of the time
- Hydraulic functions slowing down or stopping because solenoids lose signal
When diagnostics point to a circuit fault rather than a failed component, replacing the wiring is often the most cost-effective repair.
Fitting Advice
- 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.
- Add protective sleeving wherever the old harness showed signs of rubbing.
Confirming Fitment
Model names are not always enough to confirm fitment, because manufacturers sometimes change harness designs within a model's production run. Check the part number on your existing harness, or send us your machine model and serial number, and we will check it for you.
Common Questions
Is this harness plug-and-play?
Yes. It is built to the original layout with matching connectors, so it installs in place of the original without cutting or splicing.
How do I know it will fit my machine?
Match the part number on your old harness, or send us your machine model and serial number and we will confirm before you order.
How long does shipping take?
Orders are shipped by express courier such as DHL, FedEx, UPS or TNT, and you will receive a tracking number by email as soon as your parcel leaves our warehouse.
Why a New Harness Beats Patching
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.
Order & Delivery
- 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.
