We thought we had a rear axle bearing that needed to be replaced, so we took the axle out to inspect the bearings. Come to find out they just needed a good cleaning/re-lubed.
The problem we have encountered now is getting the axle to spin freely once all the bolts on the cassettes are tightened down. Axle spins freely when not tightened down. What are we doing wrong? Any advice/tips would be helpful. Thanks in advance!
It happens, best way I’ve found is to put the axle in, and lightly tighten all bolts, tap the axle in several different places side to side with a rubber mallet, lightly tap the axle again from one side to the other, and repeat till bolts are tight. Alternate with the bolts also. When I say lightly, enough so it knows it’s being hit. That gets everything lined up. Also tap the bearing cassettes
Tighten the outer bearings first with the axle in place. Use a yard stick across the bottom of the frame and measure from the bottom of the axle to the top of the yard stick (bottom of the frame) to get axle straight with the frame. Then tighten the third middle bearing. If it tightens up after tightening the third bearing drill the mounting holes in the bearing hanger bigger and try again. Are you sure the axle is not bent?
FAA certified jet engine and aircraft technician,
Nicholson Speedway class champion 2001,
Yamaha KT100 Service Center,
41 years karting experience