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Gear lash tool?

Discussion in 'XJ DIY How-To Instructions' started by xjyamaha, Mar 16, 2015.

  1. xjyamaha

    xjyamaha Member

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    Anyone have a makeshift gear lash holder tool for the final drive they've fabricated themselves? The clamp that bolts down and holds the "spindle" where the rear wheel slides on seems a bit hard to find, and expensive when you can find it.
     
  2. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    I was just thinking about this last night, but forgot to post in your other thread. For the gear lash holder tool you can just set the wheel on the ground and mount the final drive to the wheel; that should provide plenty of mass to keep the output spindle from turning while measuring lash at the input shaft. you may have to use sandbags on either side of the final drive housing to keep it from turning, or arrange some woodworking clamps to serve as stops. The tool itself is just a bent peice of flat bar. One end is cut to fit the spline grooves of the spindle, and the other has a hole in it so it can be bolted to the housing. If you don't have the tools to make one then a amchine shop could make one for you (this is the busy season, so there might be a wait).

    The gear holding tool (for the input shaft) looks like it can be fabricated from a spare driveshaft, a short length of tubing, and a short lenght of the remainder of the dives haft for tha handle. If you look at the picture of it in the FSM you will probably see what I'm thinking of.
     
  3. xjyamaha

    xjyamaha Member

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    Excellent. Thank you!
     
  4. xjyamaha

    xjyamaha Member

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    My ingenuity shows itself at times. Used a drill and dremel on an old hinge, placed the wheel flange placed into the final drive output, then used a three bolts to secure it all, with a 50mm bolt and a spacer at the end to ensure the bolt torqued down.

    I measured the lash and get nothing. Should there be the slightest amount? My service manual has a range ( .1-.2mm) so I'm wondering if I need to adjust the shims. I guess it's good there isn't an excessive amount...
     

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  5. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    You want some lash or ther will be no oil film between the gear faces. You will need to use the information in the service manual to figure what shims you need.

    Out of curiosity, what does your dial indicator and fixture look like?
     
  6. xjyamaha

    xjyamaha Member

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    Got a gauge and holder from the Chinese Cheesecake Factory ( Harbor Freight).
     

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  7. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Did you check the indicator before using it to measure the gear lash? A dime measures ~1.35mm at the edge thickness. Set the indicator up so the bench top is 0, then lift the base of the indicator enough so you can slide the dime under the tip of the indicator. See what it measures.
     
  8. schmuckaholic

    schmuckaholic Well-Known Member

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    I am SO stealing that phrase.
     
    Franz, jmilliken and xjyamaha like this.
  9. xjyamaha

    xjyamaha Member

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    Haha. I can't claim ownership, but I can agree.
     

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