Reconditioning Dimensions for Track Links, Idlers, Rollers and Scraper Elevator Rollers{4154, 4159, 4171, 4180, 6248, 6260} Caterpillar

Introduction

This Special Instruction contains charts which list the part numbers, reconditioning dimensions and their applicable models for the following items:

* Track Links

* Front Idlers

* Track Rollers

* Track Carrier Rollers

* Elevator Chain Carrier Rollers

Also included is a chart listing the clearance dimensions between various track links and rollers; and charts listing the bearing bore diameters for idlers and track rollers.

NOTE: Dimension (J) in the following charts is a wear dimension where the component is worn to the service limit (100% worn). Beyond this point a rebuild cannot normally be successfull.

Reference: SEHS8707 Installation of Replacement Track Roller/Idler Bearings; PEKP9400 Custom Track Service Handbook

Track Links

Front Idlers

Track Rollers (Lifetime Lubricated)

Track Carrier Rollers

Elevator Chain Carrier Rollers

Track Link and Roller Clearance

The following chart shows clearance dimension (X) when track links and rollers are new. A combination of roller and link wear can cause interference between link boss (1) and roller flange (2). See PEKP9400 Custom Track Service Handbook for the correct method to measure this dimension.