Home Forums Tech Talk Rear axle bearings/? Axle binding

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    • #46244
      Sarah Herrick
      Participant

      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!

       

    • #46246
      Ric mcDade
      Participant

      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

       

    • #46247
      Matt Dixon
      Participant

      Think of it like you torquing the head of a car. Start from the inside work out, starting with just tighten the down, spinning the axle between each cassette. Just like Ric is saying…

      94y

    • #46301
      Walt Gifford
      Participant

      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?

      Gif

      FAA certified jet engine and aircraft technician,
      Nicholson Speedway class champion 2001,
      Yamaha KT100 Service Center,
      41 years karting experience

    • #46795
      Gary Lawson
      Participant

      Odds are you don’t have the bearing centered well in the cassette. If they’re tight you need to align them before you tighten the axle down.

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