Motor Grader Shaft Pin – Diameter, Length and Retention Guide
A shaft pin supports a specific grader pivot or linkage. Correct fit depends on working diameter, supported length, end retention and lubrication details. Selecting a pin only because it passes through the bore can leave unsafe clearance or incorrect retention.
Pin identification table
| Feature | Check |
|---|
| Body | Working diameter, total length, supported length and steps |
| Retention | Bolt hole, thread, circlip groove, plate or keeper design |
| Lubrication | Grease drilling, cross-hole, groove and fitting position |
| Mating parts | Bushing ID, bracket width and bore alignment |
How to inspect the used pin
Clean the pin and measure it in several directions at loaded and unloaded zones. A polished flat, ridge or oval reading indicates directional wear. Inspect the retaining end for elongation or cracking, then measure the bushings and housing rather than assuming all play comes from the pin.
Installation focus
Align grease passages, use the specified retention parts and confirm free movement without side loading. Lubricate according to the service instruction. Recheck the retainer after initial controlled movement.
Related linkage references
See the supporting sleeve 85763201 guide and the grader link inspection page.
FAQ
Is pin diameter the only critical measurement?
No. Working length, shoulders, retention and lubrication features also control fit.
Why measure the bore?
An oval or oversized bore can remain loose with a new pin.
Can grease-hole position differ?
Yes, and misalignment may block lubrication.
Compatibility note: Confirm the pin position and all mating dimensions before purchase.
