Cat Dozer Track Adjuster & Recoil Spring

Track adjusters, recoil springs, yokes, tubes, seal kits, and complete adjuster assemblies for Caterpillar crawler dozers. Coverage spans compact and mid-size Cat dozers from the D3 through D6K series, including standard and LGP undercarriage configurations across multiple serial number ranges.

Fits Models At A Glance

• D3 Series: D3 (78U, 79U)
• D3B Series: D3B (27Y, 24Y LGP)
• D3C Series: D3C (1PJ, 6PF, 7JF, 8BF, 4HJ, 5CJ, 5ZG, 8DG, 7XL, 4KS, 6SL)
• D3G Series: D3G Standard Undercarriage
• D4 Series: D4
• D4C Series: D4C, D4C LGP (1RJ, 2CJ, 7KG, 9BG, 1FW, 8CS, 4LS, 6YL)
• D4G Series: D4G (FDC, CFN)
• D5C / D5G Series: D5C, D5G
• D6K Series: D6K (DHA, NCF, FBH, HMG), D6K-2 (RST, MXK, RPR, WMR)

Key Notes

• Undercarriage Type: Listings specify standard or LGP undercarriage and 5-roller vs. 6-roller configurations — confirm before ordering
• Serial Number Sensitivity: Many adjuster components changed at specific serial number breaks; serial prefix and range are listed on each product
• Component Coverage: Includes complete adjuster and spring kits, individual tubes, yokes, recoil springs, spring pilots, seal kits, and grease fittings
• Assembly Options: Individual components and complete adjuster-plus-spring assemblies available for most covered models

Why Choose Broken Tractor

• ✅ Broad serial number coverage across Cat D3–D6K dozers
• ✅ Individual parts and complete kits available side by side
• ✅ Fast shipping from Baton Rouge, LA and Kimbolton, OH

Frequently Asked Questions

What recoil spring fits a Cat D3C dozer?

It depends on your D3C serial number. Early D3C machines (serial 1PJ1-137, 6PF1-144, 7JF1-179 and 8BF1-148) use the 5K2754 track tension spring, which is 24-5/8 inches long. Later ranges, such as after 1PJ138, after 6PF145 and after 8BF149, use the 8Y2735 6-roller style recoil spring. Check your serial prefix and range against the fitment listed on each product before ordering.

How do I tell if I need 5-roller or 6-roller track adjuster parts for a Cat D3 or D3B?

Broken Tractor lists the roller configuration on each product, so match it to your undercarriage before ordering. The 6S3275 yoke and the PV322 track adjuster assembly are 5-roller parts for the D3 (78U, 79U) and D3B (27Y). Several D3C and D4C tubes and springs, such as 112-4297 and 8Y2735, are 6-roller parts. Choosing the wrong configuration can lead to a part that does not fit.

Should I buy a complete track adjuster and recoil spring kit or individual parts for a Cat D4C?

Both options are available, so the choice depends on how much of your adjuster needs replacing. Complete adjuster and recoil spring kits such as PV335, PV338, PV339 and PV340 fit D4C dozers, and each covers specific serial ranges. If only one component is worn, Broken Tractor also carries individual D4C tubes, yokes, recoil springs, the 2V9025 recoil spring pilot and the 904405 track adjuster seal kit.

What track adjuster parts fit a Cat D5C or D5G dozer?

Broken Tractor carries the PV342 track adjuster and recoil spring assembly, the PV343 spring assembly and the 8Y6659 recoil spring for the D5C and D5G. Individual parts include the 122-2455 right-hand and 122-2456 left-hand adjuster tubes with nut, and the 174-7004 idler yoke. The 8Y6652 yoke fits D5C series 9DL, 5HS, 6CS, 6ZL, 3MK and 6PJ, and the 176-1281 idler guard fits D5G serial WGB, RKG, FDH and FDW. If you are unsure which part matches your serial number, call (800) 909-7060.

Is there a track adjuster for a Cat D6K or D6K-2 dozer?

Yes, the 239-8247 track adjuster and spring fits the D6K (serial numbers beginning with DHA, NCF, FBH, HMG) and the D6K-2 (RST, MXK, RPR, WMR). The 382-6529 track adjuster yoke fits the D6K (DHA, FBH) and D6K2 (RST, WMR, MXK, RPR). The two parts list different serial prefixes, so confirm your prefix against each listing or match the part number before ordering.