How do I confirm pilotpart109864 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

Oil Cooler 1878391 for Caterpillar CAT 933C 939C Loader D3C D4C D5C Tractor 3046 Engine

For Caterpillar Hydraulic Oil Cooler

Hydraulic Oil Cooler CA1878391 for Caterpillar

Q: What part numbers are associated with this Hydraulic Oil Cooler?

CA1878391, 187-8391, 933C, 4MS00001-UP, 3046, 939C, 6DS00001-UP, 4KS00001-UP, 4LS00001-UP, 5HS00001-UP, CSCODE0007

OEM / REF: CA1878391SKU: pilotpart109864

Oil Cooler 1878391 for Caterpillar CAT 933C 939C Loader D3C D4C D5C Tractor 3046 Engine is a Hydraulic Oil Cooler replacement part indexed for Part Number and Caterpillar s: 933C & 933C LGP Hystat Track Loader 4MS00001-UP (MACHINE) POWERED BY 3046 Engine 939C Track Loader Hydrostatic Drive 6DS00001-UP (MACHINE) POWE...

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

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$1,736.74USD/EA

~~$191,757.00~~Save 99%

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.

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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 Part Number; Caterpillar s: 933C & 933C LGP Hystat Track Loader 4MS00001-UP (MACHINE) POWERED BY 3046 Engine 939C Track Loader Hydrostatic Drive 6DS00001-UP (MACHINE) POWERED BY 3046 Engine D3C & D3C LGP, XL Series III Hystat Tractors 4KS00001-UP (MACHINE) POWERED BY 3046 Engine D4C & D4C LGP, XL Series III Hystat Tractors 4LS00001-UP (MACHINE) POWERED BY 3046 Engine D5C & D5C LGP, XL Series III Hystat Tractors 5HS00001-UP (MACHINE) POWERED BY 3046 Engine. Compare reference number CA1878391 against the label on your existing Caterpillar component before ordering.

Additional cross references on file: 187-8391, 933C, 4MS00001-UP. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

CA1878391 187-8391933C4MS00001-UP3046939C6DS00001-UP 4KS00001-UP 4LS00001-UP 5HS00001-UP CSCODE0007

Applications

Part Number
Caterpillar s: 933C & 933C LGP Hystat Track Loader 4MS00001-UP (MACHINE) POWERED BY 3046 Engine 939C Track Loader Hydrostatic Drive 6DS00001-UP (MACHINE) POWERED BY 3046 Engine D3C & D3C LGP, XL Series III Hystat Tractors 4KS00001-UP (MACHINE) POWERED BY 3046 Engine D4C & D4C LGP, XL Series III Hystat Tractors 4LS00001-UP (MACHINE) POWERED BY 3046 Engine D5C & D5C LGP, XL Series III Hystat Tractors 5HS00001-UP (MACHINE) POWERED BY 3046 Engine

Specifications

Part Number	CA1878391, 187-8391, 1878391

Fitment Notes

Brand or application signal: Caterpillar 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.