Excavator Hydraulic Spare Parts

337-8766 52.7mm Straight Adapter with 238-5079 O-Ring for CAT 324E 336E 349E

Q: What numbers are documented for 337-8766?

Primary Equipment Part Number: 337-8766. Formatted Alias: 3378766. Included Seal - Not Interchange: 238-5079. Formatted Alias: 2385079. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 337-8766 before ordering?

Match the complete part number, compare the connector or mounting arrangement with the product photos, and confirm the machine or engine model and serial range. Send clear photos of the original unit when requesting a quote.

337-8766 52.7mm Straight Adapter with 238-5079 O-Ring for CAT 324E 336E 349E, OEM/reference 337-8766, 52.70mm Straight Fluid Adapter with O-Ring, product view 1

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OEM / reference337-8766

Specification52.70mm Straight Fluid Adapter with O-Ring

Catalog ID83976699

Straight fluid adapter identified by 337-8766, supplied with the separately identified 238-5079 FKM O-ring. Manufacturer records specify a 52.70 mm adapter length and a 90A seal for a 3/8-24 STOR connector end. Confirm the thread, port, connector and machine serial range.

Product Type: Straight Fluid Adapter with O-Ring
Product Brand: EexcavaStart
Adapter Length: 52.70 mm
Seal Cross Section: 1.63 mm
Seal Inside Diameter: 7.65 mm
Seal Material: FKM
Seal Hardness: 90A
Connector End: 3/8-24 STOR
Condition: New replacement part

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Part-number relationships

Relationship	Reference family	Number
Primary Equipment Part Number	Straight fluid adapter	337-8766
Formatted Alias	Unhyphenated adapter search format	3378766
Included Seal - Not Interchange	Compatible O-ring supplied with adapter	238-5079
Formatted Alias	Unhyphenated seal search format	2385079

Product fitment guide

Part numbers and compatible models

Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.

Part identification

Reference numbers

Primary number

337-8766

Formatting alias

3378766
2385079

Direct interchange

238-5079

Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.

Product summary

52.70mm Straight Fluid Adapter with O-Ring

Category: Excavator Hydraulic Spare Parts
Catalog ID: 83976699
Photo views: 5

Before ordering

Confirm these details

Match the complete part number on the original component.
Compare connectors, mounting points and visible dimensions with the product photos.
Confirm the exact machine or engine model and serial range before ordering.

Machine fitment

Compatible model references

4 model references

Excavator examples: CAT 324E / 329E / 336E / 349E
Engine examples: CAT C7.1 / C9.3 / C13 / C15 / C18
Additional equipment: Selected D6/D7/D8 tractors and 740B articulated trucks
Fitment limitation: Confirm 337-8766, thread, port, connector and serial range

Compatibility lists identify searchable model families, not every production serial range. Confirm the original part number and machine serial number before purchase.

Quick fitment answers

Common questions about 337-8766

Which machines use 337-8766?

Recorded compatible model references include Excavator examples: CAT 324E / 329E / 336E / 349E, Engine examples: CAT C7.1 / C9.3 / C13 / C15 / C18, Additional equipment: Selected D6/D7/D8 tractors and 740B articulated trucks, Fitment limitation: Confirm 337-8766, thread, port, connector and serial range. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 337-8766?

Documented direct interchanges: 238-5079. Formatting aliases for the same number: 3378766, 2385079.

How do I confirm 337-8766 before ordering?

Match the complete part number on the original component. Compare connectors, mounting points and visible dimensions with the product photos. Confirm the exact machine or engine model and serial range before ordering. Send clear photos of the original unit and connector layout when requesting a quote.

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