Komatsu PC100 & PC120 Pins, Links & Bushings

Pins, links, bushings, and seals for Komatsu PC100 and PC120-6 excavators, covering dipper arm linkage components, bucket pins, H-links, and hydraulic seals for maintaining full boom and bucket function.

Fits Models At A Glance

• PC100 Series: PC100
• PC120 Series: PC120, PC120-6

Key Notes

• Dipper Linkage: LH and RH dipper-to-cylinder links available with and without bolt holes
• Pins: Includes link-to-dipper, link-to-cylinder, and bucket-to-dipper arm pins (60mm x 430mm)
• Bushings: Multiple bushing part numbers covering dipper arm and linkage pivot points
• Seals: Hydraulic seals and shim & seal kits available for PC100 and PC120-6 systems
• Installation: Universal bushing driver tool available for removal and installation service work

Why Choose Broken Tractor

• ✅ Direct OEM reference cross for Komatsu part numbers
• ✅ Ships from Baton Rouge, LA and Kimbolton, OH
• ✅ Knowledgeable staff ready to confirm correct fitment

Frequently Asked Questions

What pins fit the dipper linkage on a Komatsu PC120-6 excavator?

Broken Tractor carries three main linkage pins for the Komatsu PC100 and PC120-6: the link to dipper pin (202-70-64151), the link to cylinder pin (202-70-64161), and the bucket to dipper arm pin (203-70-44380). The bucket to dipper arm pin measures 60 millimeter by 430 millimeter. Match the part number on your old pin to make sure you order the correct one for each pivot point.

What is the difference between the LH and RH dipper to cylinder links on a Komatsu PC100?

The left hand link (202-70-64121) is made without bolt holes, and the right hand link (202-70-64131) is made with bolt holes. Both fit the Komatsu PC100 and PC120-6 excavators. Check which side you are replacing and whether your original link has bolt holes before ordering.

Does the Komatsu PC100 and PC120-6 H-link come with bushings?

Yes, the Komatsu H-link we carry (203-70-00870) comes with bushings for the PC100 and PC120-6 excavators. If you only need to replace worn bushings at other dipper arm and linkage pivot points, we also offer separate bushings.

Which bushing fits a Komatsu PC120 versus a PC120-6 excavator?

Bushing 203-70-56150 is listed for the Komatsu PC100 and PC120, while bushings 203-70-56160 and 203-70-56140 are listed for the PC100 and PC120-6. Because fitment can vary by model and serial number, the safest approach is to match the part number from your old bushing. If you are unsure, call (800) 909-7060 and our parts team can help confirm the right bushing.

What seals and tools do I need when replacing pins and bushings on a Komatsu PC100 or PC120-6?

Broken Tractor offers hydraulic seals (07145-00065 and 07145-00060-A) and a shim and seal kit (PV7008) for the Komatsu PC100 and PC120-6. We also carry a steel bushing driver tool for removing and installing bushings on excavators. Replacing seals and shims while the linkage is apart helps you finish the job in one service.