Cat 304 Rubber Tracks & Parts

The CAT 304 is cataloged in more than one track width — 350 / 400 mm. Pick the width your undercarriage is actually set up for, then choose tread for the ground you work. Free freight to the lower 48 on every track, 24-month warranty.

Which width fits your CAT 304

• 400x72.5Wx72 — 400 mm (16") wide, 72.5 mm pitch, 72 links, wide guide lugs
• 350x52.5x90 — 350 mm (14") wide, 52.5 mm pitch, 90 links

These are not interchangeable by preference — the width your machine takes is set by the roller frame and sprocket it left the factory with. Wider tread floats better on soft ground and spreads ground pressure; narrower runs cheaper, turns easier and clears tight spots. Measure the existing track across the tread face before you order.

Tread choice for the CAT 304

Size gets the track on the machine; tread decides how it works and how long it lasts. What we stock for this one:

• Staggered Block — mixed dirt and gravel. Block stability with better cleanout than a straight block
• Directional — digging, trenching and slope work. The standard excavator tread

If the machine splits its time between surfaces, buy for the ground you are on most — a hard-surface tread on constant mud will spin, and a bar tread on concrete will wear out in half the hours.

CAT 304 at a glance

• Operating weight — 9,867 lb
• Engine — 45 hp

Undercarriage parts for the CAT 304

Rollers, idlers and sprockets wear on the same clock as the track. Fitting new rubber over a hooked sprocket or a seized roller is the fastest way to lose the new track — check these while the tracks are off:

• Drive sprocket — 158-4795
• Front idler — 241-5973
• Bottom roller — 340-8957
• Carrier roller — 277-8576

How these wear

Excavator undercarriages load one side hard on slew and travel, so link cracking usually shows up before the tread wears out. Replace in pairs where you can: a new track running against a stretched one loads the drive unevenly and you will feel it in the steering.

Same track, other machines

Track size follows undercarriage geometry, not brand, so one of these sizes shows up on machines from several makers. If you run any of these alongside the CAT 304, it is the same belt:

• CAT 304C
• CAT 304CR
• CAT 304E2
• CAT 304E2CR
• CAT 305
• CAT 305.5
• CAT 305CR
• CAT 306E2FB
• Case CK50
• Case CK52

Not sure which you are running? Read the size off the inside of the old track, or call (850) 816-7898 and we will pull it off the machine record. The Track Finder works by make and model too.

More CAT undercarriage

• CAT 301.5
• CAT 301.5CR
• CAT 301.6
• CAT 301.6C
• CAT 301.7
• CAT 301.7D
• All CAT tracks & parts