How do I confirm pilotpart421203-9010758058232 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 Caterpillar Excavator CAT 312 Secondary Hydraulic Relief Valve

For Caterpillar Main & Relief Valve

Main & Relief Valve pilotpart421203 for Caterpillar

OEM / REF: pilotpart421203SKU: pilotpart421203-9010758058232

For Caterpillar Excavator CAT 312 Secondary Hydraulic Relief Valve is a Main & Relief Valve replacement part for Caterpillar Hydraulic & Pneumatic Parts, categorized under Hydraulic & Pneumatic Parts > Main & Relief Valve. Use OEM part number pilotpart421203 and confirm machine model, engine model, and serial detail...

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

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$81.00USD/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.

Main & Relief Valve Description

This Main & Relief Valve is indexed for Caterpillar s: Fit For Caterpillar Excavator CAT 312 Secondary Hydraulic Relief Valve. Compare reference number pilotpart421203 against the label on your existing Caterpillar component before ordering.

Before checkout, compare OEM part number pilotpart421203, 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

pilotpart421203

Applications

Caterpillar s: Fit For Caterpillar Excavator CAT 312 Secondary Hydraulic Relief Valve

Fitment Notes

Brand or application signal: Caterpillar 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.