Case 850, 855 Dozer Track Parts

Replacement track parts for Case 850 and 855 crawler dozers, covering track chains, rollers, idlers, sprockets, track shoes, and related undercarriage hardware for new and used applications.

Fits Models At A Glance

• 850 Series: 850, 850B, 850C, 850D, 850E, 850G
• 855 Series: 855D, 855E, 855G

Key Notes

• Application: Track chains, link assemblies, and pin and bushing sets for crawler undercarriage rebuilds
• Components: Track rollers, carrier rollers, front idlers, and drive sprockets
• Track Shoes: Grouser and bolt-on pad options across multiple widths
• Condition: New aftermarket and used OEM parts available

Why Choose Broken Tractor

• ✅ Fast shipping from two US locations
• ✅ Experienced staff verifies undercarriage fitment
• ✅ New and used options for every budget

Frequently Asked Questions

What track parts fit a Case 850 dozer?

Broken Tractor carries track chains, link assemblies, pin and bushing sets, track rollers, carrier rollers, front idlers, drive sprockets, and track shoes for the Case 850 and 855 crawler dozers. Coverage spans the 850, 850B, 850C, 850D, 850E, and 850G, along with the 855D, 855E, and 855G. Because undercarriage parts can vary by model and serial number, match the part number or confirm fitment with our parts team before ordering.

Do you carry both new and used undercarriage parts for the Case 855?

Yes, Broken Tractor offers new aftermarket and used OEM track and undercarriage parts for the Case 850 and 855 dozers. This gives you options across multiple budgets for rollers, idlers, sprockets, chains, and shoes. Availability of used OEM parts can vary, so confirm the specific component you need with our staff.

What track shoe widths are available for the Case 850 and 855 dozer?

We carry grouser and bolt-on pad track shoes in multiple widths for the Case 850 and 855 dozers. The correct width depends on your machine's original undercarriage setup, so match the part number or check with our parts team to make sure you get the right shoe.

When should I rebuild the undercarriage on a Case 850 dozer?

An undercarriage rebuild is typically needed when track chains, pins, bushings, rollers, or sprockets are worn past service limits, which shows up as excessive track slack, sagging, or noise. Broken Tractor carries track chains, link assemblies, and pin and bushing sets for crawler undercarriage rebuilds on the Case 850 and 855. Our experienced staff can help verify which components you need.

How do I know which sprocket or idler fits my Case 855 dozer?

Drive sprocket and front idler fitment on the Case 855 depends on the specific model and serial number, since the 855D, 855E, and 855G can use different undercarriage components. The most reliable way to confirm is to match the part number on your existing part. You can also call our parts team at (800) 909-7060 to verify fitment.