CAT 320 1st Gen Early Undercarriage Parts

CAT 320 Undercarriage Parts

For 1st Gen — early serial range: 2DL1–1709, 3RK, 3XM, 4ZJ1–575, 7GJ, 7WK, 8LK

Shop premium 320 undercarriage parts for Caterpillar excavators equipped with a 1st Gen Early undercarriage. This guide helps you identify the correct 320 track chains, 320 track rollers, and 320 idlers for the serial number ranges listed below. When calculating your 320 undercarriage rebuild costs, choosing the right components is essential for maximizing the service life of your machine.

Order normally. After ordering, provide your machine serial number through our Exact Fit Guarantee process and our team will verify compatibility before shipment.

➜ Ready to shop? Review the guide below, then browse the product listings for available 320 excavator undercarriage parts, pricing, and current availability.

CAT 320 Serial Prefix Guide

This guide covers the following Caterpillar 320 serial prefixes:

2DL 3RK 3XM 4ZJ 7GJ 7WK 8LK

Common CAT 320 Undercarriage Components

The components below represent the most commonly replaced 320 undercarriage parts for machines with a 1st Gen Early setup. Click any linked component to view pricing and availability.

Component	CAT OEM #	Typical Qty
Track Chain (45L)	N/A	2
Track Shoe — 600mm ›	1265062	90
Top Carrier Roller	N/A	2 per side
Lower Roller — Single Flange ›	1634143	14
Lower Roller — Double Flange	N/A	14
Front Idler ›	2487143	2
Sprocket Segment ›	8E9805	2
Recoil Spring ›	7Y1606	2

Available CAT 320 Parts & Hardware

In addition to the major undercarriage components shown above, we may also offer mounting hardware, track hardware, idler hardware, track tensioning components, track guiding guards, seals, and related undercarriage parts.

Track Shoe Options: 320 track shoes are available in Triple Grouser (600mm, 700mm, 800mm) options depending on application.

➜ Ready to order? Browse the product listings below to view available Caterpillar 320 track chains, track shoes, rollers, idlers, sprockets, track tensioning components, hardware, pricing, and current availability.

What To Inspect During an Undercarriage Rebuild

Replacing Track Chain (45L)s?
Inspect track shoes, sprockets, rollers, and idlers.

Replacing Bottom Rollers?
Inspect carrier rollers, idlers, and chain wear.

Replacing Idlers?
Inspect recoil spring and track tensioning components.

Commonly Purchased Together

Replacing Track Chain (45L)s?

Customers commonly inspect or replace:

Track shoes
Sprockets
Track hardware

Replacing Bottom Rollers?

Customers commonly inspect or replace:

Top carrier rollers
Front idlers
Track chain wear

Planning a Complete Undercarriage Rebuild?

A typical rebuild may include:

• Track chains

• Track shoes

• Bottom rollers

• Front idlers

• Carrier rollers

• Sprockets

Exact Fit Guarantee

Order with confidence. After placing your order, provide your machine serial number through our Exact Fit Guarantee process and our team will verify fitment before shipment. If a fitment issue is identified before shipment, we will work with you to ensure the correct parts are supplied.