Komatsu Boom Pins & Bushings
Komatsu boom pins and bushings support one of the highest-load pivot areas on excavators, loaders, and other heavy equipment. Use this page to research aftermarket boom pivot parts, understand what must be confirmed before ordering, and move toward the correct WQC Parts quote path.
Why Boom Pivot Fitment Matters
Boom pins and bushings work under constant load transfer between the upper frame, boom structure, cylinders, and attachment. If the pin is too soft, undersized, mismatched, or installed into a worn bore, the pivot can loosen quickly and create expensive structural repair work.
- Boom foot pins and bushings can differ from boom cylinder pivots.
- Excavator, loader, and specialty boom arrangements may use different pins even when descriptions look similar.
- Grease passage alignment, pin length, diameter, retaining hardware, and bushing dimensions should be verified before installation.
Best Information to Send WQC Parts
Part Number
The fastest path is the Komatsu part number, alternate dashless number, or a clear photo of the old part marking.
Machine Details
Include model, serial number, family, and whether the machine has a standard or special arrangement.
Pivot Location
Confirm whether the part is boom foot, boom cylinder, arm-to-boom, loader boom, or another boom-related pivot.
Related Komatsu Pivot Pages
For complete workgroup repairs, compare the boom pivot with related arm, bucket link, and excavator or loader pivot pages before ordering.
- Komatsu arm pins and bushings
- Komatsu bucket link pins and bushings
- Komatsu pins and bushings technical guide
Common Questions
Are boom pins interchangeable across similar Komatsu models?
Do not assume interchange by model name alone. Confirm the part number, serial range, and pivot location before ordering.
What causes new boom pins to fail early?
Common causes include a worn bore, incorrect bushing, poor lubrication, wrong part number, or heavy attachment loads.
Need help confirming fitment? Send WQC Parts the Komatsu part number, machine model, serial number, and pivot location. We can help narrow the correct aftermarket replacement path before you order.