How do I confirm pilotpart311184 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

Hose 178-6557 For Caterpillar Excavator E320C Engine 3066

For Caterpillar Connections

Connections 178-6557 for Caterpillar

Q: What part numbers are associated with this Connections?

178-6557, MACHINE3066EXCAVATOR320CFORESTRY, EXCAVATORS320CFMHW, 320CFMSTTRACK, EXCAVATORS320C, 320CU, 320CS, 320CL, 320CLU, 6557

OEM / REF: 178-6557SKU: pilotpart311184

Hose 178-6557 For Caterpillar Excavator E320C Engine 3066 is a Connections replacement part indexed for Part Number · 178-6557 and Caterpillar Excavator E320C Engine 3066 Hose 178-6557, with 3 application records on file. Match OEM part number 178-6557 and confirm fitment for Caterpillar Hydraulic & Pneumatic Parts...

Stock: In stock
Condition: New
Fitment: Caterpillar Hydraulic & Pneumatic Parts
Category: Connections

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$86.18USD/EA

~~$29,899.00~~Save 100%

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.

Connections Description

This Connections is indexed for Part Number · 178-6557; Caterpillar Excavator E320C Engine 3066 Hose 178-6557; ENGINE - MACHINE3066EXCAVATOR320CFORESTRY EXCAVATORS320CFMHW,320CFMSTTRACK EXCAVATORS320C,320CU,320CS,320CL,320CLU Specification: Size:50*60*45; Caterpillar CAT Excavator E320C Engine 3066. Compare reference number 178-6557 against the label on your existing Caterpillar component before ordering.

Additional cross references on file: MACHINE3066EXCAVATOR320CFORESTRY, EXCAVATORS320CFMHW, 320CFMSTTRACK. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

178-6557 MACHINE3066EXCAVATOR320CFORESTRY EXCAVATORS320CFMHW 320CFMSTTRACK EXCAVATORS320C 320CU 320CS 320CL 320CLU6557

Applications

Part Number · 178-6557
Caterpillar Excavator E320C Engine 3066 Hose 178-6557
ENGINE - MACHINE3066EXCAVATOR320CFORESTRY EXCAVATORS320CFMHW,320CFMSTTRACK EXCAVATORS320C,320CU,320CS,320CL,320CLU Specification: Size:50*60*45
Caterpillar CAT Excavator E320C Engine 3066

Specifications

Part Number	178-6557

Fitment Notes

Brand or application signal: Caterpillar Hydraulic & Pneumatic Parts
Product family: Connections
System category: Hydraulic & Pneumatic Parts > Connections > Connections
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.