Cat E110B, E120B, 311, 311B, 311C, 312, 312B Pins

Pins, bushings, links, seals, and shim kits for Caterpillar 311 and 312 series excavators, covering the full range of bucket-to-dipper, link-to-dipper, and H-link components across legacy E-series through late-model C and D generations.

Fits Models At A Glance

• Legacy E-Series: E110B, E120B
• 311 Series: 311, 311B, 311C
• 312 Series: 312, 312B, 312C, 312CL, 312D, 312DL, 312E, 312EL
• 314 Series: 314C CR, 314C LCR, 314D CR, 314D LCR

Key Notes

• Pin Types: Bucket-to-dipper and link-to-dipper pins available for E110B through 312B fitment
• Link Assemblies: H-links with bushings, left-hand and right-hand link-to-dipper options with varying bolt hole configurations
• Bushings & Seals: Open-end, closed-end, and standard bushings plus seals and shim kits spanning E-series through 312E/314D generations
• Tooling: Steel bushing driver removal and installation tool available for service work
• Fitment Span: Many components overlap across multiple series — verify model and generation before ordering

Why Choose Broken Tractor

• ✅ Deep Cat excavator pin inventory across generations
• ✅ Fast shipping from Baton Rouge, LA and Kimbolton, OH
• ✅ Knowledgeable team ready to confirm fitment details

Frequently Asked Questions

What bucket pins fit a Cat 312B excavator?

Broken Tractor carries the bucket-to-dipper arm pin, SKU 144-1013, and the link-to-dipper pin, SKU 144-1012, for the Cat 312B. Both pins also fit the E110B, E120B, 311, 311B, 311C and 312. Many of these components overlap across series, so match the part number on your old pin before ordering.

Does the Cat 312 H-link come with bushings?

Yes, the H-link SKU 168-0015 is sold with bushings installed. It fits the Cat E110B, E120B, 311, 311B, 311C, 312, 312B, 312C, 312CL, 314C CR and 314C LCR excavators. If you only need replacement bushings, we also carry open-end and closed-end H-link bushings sold separately.

Which H-link bushing fits a Cat 311B, open-end or closed-end?

Broken Tractor offers both styles for the Cat 311B. The closed-end H-link bushing, SKU 189-3869, fits the E110B through 312B, and the open-end H-link bushing, SKU 143-3835, fits the E110B through 312C. Because the right bushing depends on its position on your machine, match the part number on the old bushing or call our parts team at (800) 909-7060 to confirm.

What is the difference between the left hand and right hand link to dipper on a Cat 311?

The left hand link to dipper, SKU 198-5736, has a bolt hole and fits the Cat E110B, E120B, 311, 311B, 311C, 312 and 312B. The right hand link to dipper, SKU 198-5737, fits the same models plus the 312C. Bolt hole configurations vary between the two sides, so compare your existing link and its part number before ordering.

What do I need to replace pins and bushings on a Cat 312 excavator?

Along with pins and bushings, Broken Tractor offers a shim and seal kit, SKU PV7013, that fits the Cat E110B, E120B, 311, 311B, 311C, 312, 312B, 312C and 312CL. We also carry individual seals and O-rings, plus a steel bushing driver tool for removing and installing bushings. Seal fitment varies by generation, so match each part number to your machine.