Cat Excavator Pins, Bushings, & Links

Pins, bushings, and links for Caterpillar excavators, covering boom, arm, and bucket connection points across a wide range of Cat excavator series from compact to large-class machines. These undercarriage and attachment components are critical to maintaining accurate joint alignment, reducing slop, and extending the working life of your excavator's front linkage.

Fits Models At A Glance

• 300 Series (Mini/Compact): 301.5, 302.5, 303, 303.5, 304, 305, 306, 307, 308
• 312–315 Series: 312, 312B, 312C, 312D, 313, 314, 315, 315B, 315C, 315D
• 316–325 Series: 316, 317, 318, 319, 320, 320B, 320C, 320D, 321, 322, 323, 324, 325
• 326–340 Series: 326, 328, 329, 330, 330B, 330C, 330D, 336, 336D, 340
• 349–395 Series: 349, 352, 365, 374, 390, 395

Key Notes

• Application: Boom-to-frame, boom-to-arm, arm-to-bucket, and bucket link pivot points
• Material: Hardened steel pins and bronze or steel bushings for wear resistance
• Fitment: Verify pin diameter, length, and bore size against your machine's serial number
• Condition: New and used pins, bushings, and link assemblies available
• Compatibility: Suitable for OEM-spec and aftermarket bucket and thumb attachments

Why Choose Broken Tractor

• ✅ Covers Cat excavators from compact to large class
• ✅ New and used linkage components available nationwide
• ✅ Fast shipping from Baton Rouge, LA and Kimbolton, OH

Frequently Asked Questions

What Cat excavator models do Broken Tractor pins and bushings fit?

Broken Tractor carries pins, bushings, and links for Cat excavators from compact to large class. That includes 300 series mini excavators like the 301.5, 303.5, 305 and 308, mid-size models like the 312, 315, 320, 325 and 330, and larger machines like the 336, 349, 374, 390 and 395. Exact fitment can vary within a model, so confirm the part against your serial number before ordering.

How do I find the right pin or bushing for my Cat excavator?

Measure the pin diameter, pin length, and bore size, then check those numbers against your machine's serial number. Pins and bushings can differ between versions of the same model, such as a 320B, 320C and 320D. If you are not sure which part matches your machine, call the parts team at (800) 909-7060 with your model and serial number.

What are the signs of worn pins and bushings on a Cat excavator?

The most common sign is slop or play at the boom, arm, or bucket joints. Worn pins and bushings also throw off joint alignment, which makes the front linkage less precise. Replacing them restores a tighter fit at the boom-to-frame, boom-to-arm, arm-to-bucket, and bucket link pivot points.

Does Broken Tractor sell new or used Cat excavator pins and bushings?

Broken Tractor offers both new and used pins, bushings, and link assemblies for Cat excavators. Pins are made of hardened steel, and bushings come in bronze or steel for wear resistance. Fast shipping is available from Baton Rouge, LA and Kimbolton, OH.

Will Cat excavator bucket pins work with an aftermarket bucket or thumb?

Yes, the pins and bushings Broken Tractor carries are suitable for both OEM-spec and aftermarket bucket and thumb attachments. Before ordering, make sure the pin diameter and length match the bores on both your excavator and the attachment. Fitment can change by serial number, so match the part to your machine first.