How do I confirm pilotpart442595 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

Fan-Suction 178-6578 for Caterpillar CAT 320C 319C 318C Excavator 3066 Engine

For Caterpillar Wire Harness

Wire Harness 178-6578 for Caterpillar

OEM / REF: 178-6578SKU: pilotpart442595

Fan-Suction 178-6578 for Caterpillar CAT 320C 319C 318C Excavator 3066 Engine is a Wire Harness replacement part indexed for Part Number and Caterpillar CAT Excavator 320C 319C 318C 3066 Engine. Match OEM part number 178-6578 and confirm fitment for Caterpillar Electrical Parts before ordering.

Stock: In stock
Condition: New
Fitment: Caterpillar Electrical Parts
Category: Wire Harness

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$237.99USD/EA

~~$29,899.00~~Save 99%

Estimated delivery by quantity

Estimated delivery windows
Qty	Estimated delivery
1	Aug 18 – Aug 25
10	Aug 16 – Aug 23
50	Aug 14 – Aug 21

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.

Wire Harness Description

This Wire Harness is indexed for Part Number; Caterpillar CAT Excavator 320C 319C 318C 3066 Engine. Compare reference number 178-6578 against the label on your existing Caterpillar component before ordering.

Additional cross references on file: CA1786578. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

178-6578 CA1786578

Applications

Part Number
Caterpillar CAT Excavator 320C 319C 318C 3066 Engine

Specifications

Part Number	178-6578, 1786578, CA1786578

Fitment Notes

Brand or application signal: Caterpillar Electrical Parts
Product family: Wire Harness
System category: Electrical Parts > Wiring & Connections > Wire Harness
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.