How do I confirm pilotpart290289 fits my machine?

Compare the OEM or reference part number, machine model, engine model, and serial number. You can also submit a fitment inquiry before ordering.

In Stock

For Komatsu Water Pump

Water Pump Y123900-42101 for Komatsu

Q: What part numbers are associated with this Water Pump?

Y123900-42101, 123900-42101, PW95R-2, WA90-3, WA95-3, WB140-2, WB140-2N, WB140PS-2, WB140PS-2N, WB150-2, WB150-2N, WB150AWS-2

OEM / REF: Y123900-42101SKU: pilotpart290289

Engine Water Pump Y123900-42101 for Komatsu PC95R-2 PW95R-2 WA115-3 WA90-3 WA95-3 WB140-2 WB150-2 WB91R-2 is a Water Pump replacement part indexed for Part Number and Komatsu Exacavator:PC95R-2, PW95R-2 Loader:WA115-3, WA90-3, WA95-3 Backhoe: WB140-2, WB140-2N, WB140PS-2, WB140PS-2N, WB150-2, WB150-2N, WB150AWS-2, W...

Stock: In stock
Condition: New
Fitment: Komatsu Engine Spare Parts
Category: Water Pump

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$243.53USD/EA

~~$38,199.00~~Save 99%

Estimated delivery by quantity

Estimated delivery windows
Qty	Estimated delivery
1	Oct 21 – Oct 28
10	Oct 19 – Oct 26
50	Oct 17 – Oct 24

Estimates from today; confirm exact lead time before payment.

Quantity

Buy online now or add to your quote list for bulk pricing and fitment confirmation.

Confirm fitment before ordering →

Lead times can vary by freight route and customs. Contact support for expedited shipping.

Water Pump Description

This Water Pump is indexed for Part Number; Komatsu Exacavator:PC95R-2, PW95R-2 Loader:WA115-3, WA90-3, WA95-3 Backhoe: WB140-2, WB140-2N, WB140PS-2, WB140PS-2N, WB150-2, WB150-2N, WB150AWS-2, WB150AWS-2N, WB150PS-2, WB150PS-2N, WB91R-2 Specification: 55mm. Compare reference number Y123900-42101 against the label on your existing Komatsu component before ordering.

Additional cross references on file: 123900-42101, PW95R-2, WA90-3. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

Y123900-42101 123900-42101 PW95R-2 WA90-3 WA95-3 WB140-2 WB140-2N WB140PS-2 WB140PS-2N WB150-2 WB150-2N WB150AWS-2

Applications

Part Number
Komatsu Exacavator:PC95R-2, PW95R-2 Loader:WA115-3, WA90-3, WA95-3 Backhoe: WB140-2, WB140-2N, WB140PS-2, WB140PS-2N, WB150-2, WB150-2N, WB150AWS-2, WB150AWS-2N, WB150PS-2, WB150PS-2N, WB91R-2 Specification: 55mm

Specifications

Part Number	Y123900-42101, Y12390042101, 123900-42101, 12390042101

Fitment Notes

Brand or application signal: Komatsu Engine Spare Parts
Product family: Water Pump
System category: Engine Spare Parts > Lubrication & Cooling Systems > Water Pump
Recommended verification: OEM number, engine model, serial number, old part photos, and dimensions.

Shipping & Returns

Availability: InStock
Shipping: Shipping quotes can be confirmed before payment for heavy or urgent orders.
Returns: Returns are easier when fitment is confirmed before ordering.
B2B support: Bulk, fleet, and repair-shop requests can be handled through the inquiry form.

Frequently Asked Questions

How do I confirm this part fits my machine?

Match the OEM or reference number first, then verify machine model, engine model, serial number, connector layout, mounting points, and old part photos.

Can I order if my part number is not listed?

Yes. Send the old part number, machine plate, and photos through the fitment inquiry form. Support can review possible replacements or alternatives.

Is this an OEM part?

Products are indexed as replacement parts unless explicitly marked otherwise. Always compare reference numbers and confirm fitment before purchase.