Are these aftermarket undercarriage parts compatible with my Caterpillar 320 (1st Gen Early) excavator?
Yes. The aftermarket CAT Caterpillar 320 undercarriage parts offered by Propel Parts are engineered as direct replacement components for 320 excavators and are designed to meet or exceed OEM specifications for fit, function, and performance. Compatibility depends on your machine serial number prefix. This guide covers the 1st Gen Early configuration with serial prefixes 2DL, 3RK, 3XM, 4ZJ, 7GJ, 7WK, 8LK. If you are unsure, provide your serial number and our team will verify fitment before shipment.
Do I need to provide my serial number before ordering CAT 320 undercarriage parts?
No, you can place your order normally. After ordering, simply provide your machine serial number through our Exact Fit Guarantee process. Our team will verify compatibility before shipment to ensure the correct parts are supplied. This guide covers Caterpillar 320 1st Gen Early undercarriage machines with serial prefixes 2DL, 3RK, 3XM, 4ZJ, 7GJ, 7WK, 8LK.
What undercarriage parts are commonly replaced on a CAT 320 (1st Gen Early) excavator?
Common replacement components for the Caterpillar CAT 320 include Sealed and Greased Track Chains, Track Shoes, Lower Rollers (Bottom Rollers), Top Carrier Rollers, Front Idlers, Sprocket Segments, and Track Tensioning Components. These are commonly replaced during routine maintenance and complete undercarriage rebuilds.
What is included in a complete Caterpillar 320 (1st Gen Early) undercarriage rebuild?
A complete CAT 320 undercarriage rebuild typically requires 2 track chains, 90 track shoes (varies by side), 14 lower rollers, 4 top carrier rollers, 2 front idlers, 2 sprockets, and recoil springs. Additional hardware such as track bolts, nuts, and track guiding guards may also be required depending on wear.
What track shoe options are available for the CAT 320 excavator?
CAT 320 track shoes are available in several configurations: Triple Grouser (600mm, 700mm, 800mm) and heavy-duty options. The right choice depends on your machine's operating environment and flotation requirements.
What should be inspected when replacing Caterpillar 320 track chains?
When replacing your CAT 320 track chains, inspect the track shoes, sprockets, lower rollers, carrier rollers, and idlers. Replacing worn mating components at the same time helps maximize the lifespan of your new track chains and prevents premature wear.
What are the track specifications for the Caterpillar 320 excavator?
The standard track specifications for the CAT 320 (45L) undercarriage are: Pitch 7.50", Bolt Diameter 3/4" (20mm), Link Height 105mm, and Bushing Outside Diameter (O.D.) 58.7mm.
Are track bolts and nuts included with CAT 320 track shoes?
Track hardware is typically sold separately. When replacing Caterpillar 320 track shoes, you will need 3/4" (20mm) track bolts and nuts. It is highly recommended to use new hardware when installing new track shoes to ensure proper torque and prevent loosening.
What parts do I need to replace the full undercarriage on a CAT 320?
If you're doing a complete undercarriage replacement on a Caterpillar 320, here's a full parts and hardware reference based on standard machine configuration:
Main Undercarriage Components
| Component |
Qty per Machine |
| Track Chain — Sealed & Greased | 2 (1 per side) |
| Track Shoes (600mm, 700mm, or 800mm) | 90 (45 per side) |
| Lower Rollers (Bottom Rollers) | 14 (7 per side) |
| Top Carrier Rollers | 4 (2 per side) |
| Front Idlers | 2 (1 per side) |
| Sprocket Segments | 2 |
What happens if I order the wrong Caterpillar 320 undercarriage part?
Our Exact Fit Guarantee is designed to prevent ordering errors. After placing your order, provide your machine serial number and our team will verify compatibility before shipping. If a fitment issue is identified, we will work with you to ensure the correct replacement parts are supplied for your CAT 320 excavator.
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