How do I confirm pilotpart323581 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

Main Valve Assy 723-18-18504 for Komatsu PC56-7 PC57-7 Excavator

For Komatsu Main & Relief Valve

Main & Relief Valve 723-18-18504 for Komatsu

OEM / REF: 723-18-18504SKU: pilotpart323581

Main Valve Assy 723-18-18504 for Komatsu PC56-7 PC57-7 Excavator is a Main & Relief Valve replacement part indexed for Part Number and Komatsu Komatsu PC56-7 PC57-7 Excavator. Match OEM part number 723-18-18504 and confirm fitment for Komatsu Hydraulic & Pneumatic Parts before ordering.

Stock: In stock
Condition: New
Fitment: Komatsu Hydraulic & Pneumatic Parts
Category: Main & Relief Valve

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$5,245.81USD/EA

~~$29,899.00~~Save 82%

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.

Main & Relief Valve Description

This Main & Relief Valve is indexed for Part Number; Komatsu Komatsu PC56-7 PC57-7 Excavator. Compare reference number 723-18-18504 against the label on your existing Komatsu component before ordering.

Additional cross references on file: PC56-7, PC57-7. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

723-18-18504 PC56-7 PC57-7

Applications

Part Number
Komatsu Komatsu PC56-7 PC57-7 Excavator

Specifications

Part Number	723-18-18504,7231818504

Fitment Notes

Brand or application signal: Komatsu Hydraulic & Pneumatic Parts
Product family: Main & Relief Valve
System category: Hydraulic & Pneumatic Parts > Hydraulic & Pneumatic Valves > Main & Relief Valve
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.