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Read articles →This is a hands-on repeat repair: the owner replaces a front axle bearing and seal on the M4900's other side, having done this same job a couple years earlier. It shows disassembly, spotting metal debris and worn bearings, pulling the ring gear, fitting new bearings with shims and an O-ring, and refilling the axle housing with grease. Useful for owners troubleshooting a leaking axle seal or planning this specific repair themselves.
Posted by the Mill Gap Farms channel, an owner doing their own repairs and sharing the process, including brand-specific parts-sourcing tips.
You see metal debris and grease residue around the rim, which means the bearing grease is gone and the bearing is worn.
The axle takes two shims along with the bearing, which the owner found using the parts diagram from Messick's website.
Yes, an O-ring is used in the assembly. It is cheap, so it is worth replacing since you already have the axle apart.
Leave the vent plug off and add grease until it starts coming out of the vent plug, which means there is enough grease in the system.
