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Komatsu 20Y-54-39402 is the wiper motor with its linkage (motor, mounting bracket, drive links and wiper shaft pivot) and a flying lead with connector. It is used on Komatsu -6 series excavators (PC100-6 to PC300-6, 6D102 engine). This aftermarket version has the same mounting and electrical connector as the original, so it plugs in and bolts on where the old one came off.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Wiper Motor |
| Replaces | Komatsu 20Y-54-39402 |
| Type | Wiper motor with linkage, bracket and shaft pivot |
| Voltage | 24 V |
| Fits | Komatsu PC100-6; Komatsu PC120-6; Komatsu PC130-6; Komatsu PC150-6K; Komatsu PC160-6K; Komatsu PC180LC-6K; Komatsu PC200-6; Komatsu PC220-6; Komatsu PC300-6 |
| Condition | New, aftermarket |
| Stat. HS-Code | 851240 |
Komatsu machines
Check the part number on your old unit before ordering.
| Komatsu Part No.(SPM Part No.) | Fits |
|---|---|
| 20Y-54-39402(SPM-HEP-3061) | Komatsu PC100-6, Komatsu PC120-6, Komatsu PC130-6, Komatsu PC150-6K, Komatsu PC160-6K, Komatsu PC180LC-6K, Komatsu PC200-6, Komatsu PC220-6, Komatsu PC300-6 |
Wipers stop or run slowly
When the wipers stop, run slowly or only work on one speed, check the fuse, the wiper switch and the relay first. If power reaches the motor plug and the wipers still do not move, the motor has failed.
Wipers will not park
The park switch inside the motor stops the blades at the edge of the glass. A worn park switch leaves the wipers stopping mid screen or running on after the switch is turned off.
Noisy or stalling motor
Worn gears and brushes make the motor grind, stall on a dry screen or blow fuses. A new motor brings back full speed and a clean sweep.
Fitting tips
Disconnect the battery, mark the position of the wiper arm on its shaft, unplug the motor and remove its mounting bolts. Fit the new motor in the same position, run it once to the park position and then refit the arm so the blade parks where it did before.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (12 aftermarket sellers) | USD 99.00 to 174.39 | 7 Oct 2026 |
| MyMROmarts | USD 151.99 | 7 Oct 2026 |
| Fab Heavy Parts | USD 170.52 | 7 Oct 2026 |
| YEM Parts | USD 192.38 | 7 Oct 2026 |
| Spare Part Mart | USD 79.20 | Today |
Our price of USD 79.20 is 20% to 59% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
No. It is an aftermarket part made to fit in place of Komatsu 20Y-54-39402. It is not made by or affiliated with Komatsu; the Komatsu part number is used only to show what it replaces.
It fits Komatsu PC100-6; Komatsu PC120-6; Komatsu PC130-6; Komatsu PC150-6K; Komatsu PC160-6K; Komatsu PC180LC-6K; Komatsu PC200-6; Komatsu PC220-6; Komatsu PC300-6. Machines change parts between serial number ranges, so check the number on your old part or in your parts manual.
It has the same mounting and electrical connector as the original. Check the plug and terminals match your old part, and test it before putting the machine back to work.
Yes, we ship worldwide. Shipping is calculated at checkout, and every order is covered by our 30 day money back guarantee and price beat guarantee.
Prices depend on your ZIP or postcode.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
