How do I confirm pilotpart013139-8591124857080 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 Swing Gearbox

Swing Gearbox 21W-26-00052 for Komatsu

Q: What part numbers are associated with this Swing Gearbox?

21W-26-00052, PC78US-5, WY21W-26-00052

OEM / REF: 21W-26-00052SKU: pilotpart013139-8591124857080

Swing Gearbox 21W-26-00052 for Komatsu Excavator PC75UU-3 PC78US-5 is a Swing Gearbox replacement part for Komatsu Hydraulic & Pneumatic Parts, categorized under Hydraulic & Pneumatic Parts > Swing Gearbox. Use OEM part number 21W-26-00052 and confirm machine model, engine model, and serial details before checkout.

Stock: In stock
Condition: New
Fitment: Komatsu Hydraulic & Pneumatic Parts
Category: Swing Gearbox

Fitment support before you order
Worldwide delivery options

Quote required

Price on requestRFQ

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

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This part requires a quote. Add it to your quote list or send machine details for pricing and lead time.

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

Swing Gearbox Description

The product belongs to Hydraulic & Pneumatic Parts > Other Hydraulic & Pneumatic Parts > Swing Gearbox, making it useful when comparing related hydraulic & pneumatic parts Swing Gearbox options for Komatsu Hydraulic & Pneumatic Parts.

Additional cross references on file: PC78US-5, WY21W-26-00052. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

21W-26-00052 PC78US-5 WY21W-26-00052

Fitment Notes

Brand or application signal: Komatsu Hydraulic & Pneumatic Parts
Product family: Swing Gearbox
System category: Hydraulic & Pneumatic Parts > Other Hydraulic & Pneumatic Parts > Swing Gearbox
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.