How do I confirm pilotpart509275 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

Hydraulic Oil Cooler ASSY 21W-03-31122 21W-03-31121 for Komatsu Excavator PC78UU-5 PC75UU-3

For Komatsu Hydraulic Oil Cooler

Hydraulic Oil Cooler 31121 for Komatsu

OEM / REF: 31121SKU: pilotpart509275

Hydraulic Oil Cooler ASSY 21W-03-31122 21W-03-31121 for Komatsu Excavator PC78UU-5 PC75UU-3 is a Hydraulic Oil Cooler replacement part for Komatsu HVAC Parts, categorized under HVAC Parts > Hydraulic Oil Cooler. Use OEM part number 31121 and confirm machine model, engine model, and serial details before checkout.

Stock: In stock
Condition: New
Fitment: Komatsu HVAC Parts
Category: Hydraulic Oil Cooler

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$1,418.00USD/EA

Estimated delivery by quantity

Estimated delivery windows
Qty	Estimated delivery
1	Oct 22 – Oct 29
10	Oct 20 – Oct 27
50	Oct 18 – Oct 25

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.

Hydraulic Oil Cooler Description

This Hydraulic Oil Cooler is indexed for Komatsu Komatsu Excavator PC78UU-5 PC75UU-3. Compare reference number 31121 against the label on your existing Komatsu component before ordering.

Before checkout, compare OEM part number 31121, connector layout, mounting position, and machine serial number. For high-value or fitment-sensitive parts, submit the fitment form below so support can verify the match.

Part Numbers and Cross References

31121

Applications

Komatsu Komatsu Excavator PC78UU-5 PC75UU-3

Fitment Notes

Brand or application signal: Komatsu HVAC Parts
Product family: Hydraulic Oil Cooler
System category: HVAC Parts > Cooling System Components > Hydraulic Oil Cooler
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.