Excavator Engine Parts

347-7963 Alternator Belt Tensioner for Cat C13 C15 C18 Engines

Q: What numbers are documented for 347-7963?

Primary Equipment Part Number: 347-7963. Formatted Alias: 3477963. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 347-7963 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.

347-7963 Alternator Belt Tensioner for Cat C13 C15 C18 Engines, OEM/reference 347-7963, Spring Belt Tensioner with Single-Bolt Mount, product view 1

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OEM / reference347-7963

SpecificationSpring Belt Tensioner with Single-Bolt Mount

Catalog ID78851918

347-7963 is a Cat spring belt tensioner for alternator and compressor drive systems. Cat lists C13, C15, C18 and C9.3 engine applications across 336/340 excavators, D6/D8/D9 tractors, 966/972 loaders and other equipment. Confirm engine arrangement and serial.

Product Type: Engine alternator/compressor belt tensioner
Tensioner Type: Spring tensioner
Mounting: Single-bolt mount
Envelope Dimensions: Approximately 7.3 x 3.7 x 3.0 in

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Part-number relationships

Relationship	Reference family	Number
Primary Equipment Part Number	Cat reference	347-7963
Formatted Alias	Same number without separator	3477963

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

347-7963

Formatting alias

3477963

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

Product summary

Spring Belt Tensioner with Single-Bolt Mount

Category: Excavator Engine Parts
Catalog ID: 78851918
Photo views: 4

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

3 model references

Engines: Cat C13 / C15 / C18 / C9.3 family
Representative machines: Cat 336 / 340 excavators; D6 / D8 / D9 tractors; 966 / 972 loaders
Fitment limitation: Confirm arrangement and serial

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 347-7963

Which machines use 347-7963?

Recorded compatible model references include Engines: Cat C13 / C15 / C18 / C9.3 family, Representative machines: Cat 336 / 340 excavators; D6 / D8 / D9 tractors; 966 / 972 loaders, Fitment limitation: Confirm arrangement and serial. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 347-7963?

Formatting aliases for the same number: 3477963.

How do I confirm 347-7963 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.

Continue comparing verified references from the same system.

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