Komatsu 600-8 Excavator Wiring Harness — All 3 Sections
The Komatsu 600-8 uses 3 separate harness sections that ECS builds. They are not interchangeable: the part number on your old loom decides which one you need. Below they are grouped by where each section sits on the machine, with the part numbers and the symptoms that point to each group.
Which section do I actually need?
Start from the fault, not from the part name. Find the symptom the operator reports, then open that group.
| Section | First symptom to look for | Group |
|---|---|---|
| Alternator Harness | Battery not charging, warning on | Alternator Harness group |
| Instrument & Interior Harness | One instrument or accessory dead | Instrument & Interior Harness group |
Alternator Harness 1 part
It is the short charging-circuit harness between the alternator, the battery and the machine harness.
| Part # | Description | Price | Stock |
|---|---|---|---|
| 6261-81-9310 | Alternator Wiring Harness | $110.00 | In stock |
Instrument & Interior Harness 2 parts
It sits inside the cab, behind the trim, feeding the instruments and controls the operator sees and touches.
| Part # | Description | Price | Stock |
|---|---|---|---|
| 21M-06-21121 | Interior Wiring Harness | $517.00 | In stock |
| 21M-06-21822 | Interior Wiring Harness | $1000.00 | In stock |
Not sure which of the 3 sections is yours?
Send a photo of the tag on your old harness to WhatsApp +86-13714733803 and we will confirm the part number against this list before you order. Getting the section wrong is the most common reason a replacement does not fit.