Pilot Bearing

Discussion in '1947-1954' started by Volker, Sep 23, 2008.

  1. Volker

    Volker Member

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    Germany, nearby Leipzig
    I found my tranny noise today. :) and thought i bought a new pilot bushing and all is OK. Nothing! The pilot bushing is a brass bushing but the diameter is too small. ( I have a roller bearing inside) After removing my tranny and clutch i take a pic. Could you help me which part i need?. I'm looking at the catalog from Jim Carter and Chev's but not to find. Could i use Nates "grease" method to replace?.

    Volker
     

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  2. vwnate1

    vwnate1 Member

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    Clutch Pilot Bearing

    Yes , Vokler , you can , dismount the clutch first .

    If you can find a MACHINE SHOP WITH SOME SINTERED BRASS , THEY CAN EASILY MAKE YOU A NEW ONE , BE SURE TO SOAK IT IN SOME 10w OIL FOR A FEW DAYS BEFORE INSTALLING .

    I am sure that Chevs Of The 40s in Washington State will have a brandy new one for you in stock .
     
  3. Volker

    Volker Member

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    Germany, nearby Leipzig
    Pilot

    Thanks Nate. It seem that the bearing is pressed into the flywheel. Is it correct?. If yes i can take out the flywheel and go to the machine shop.
    Please let me know if i have a wrong idea.
    ...and is it simple if i take out the flywheel??

    Chev's don't have this bearing. i talked yesterday with Chev's. Only small bushing and roller bearing for 31 till 39
     
    Last edited: Sep 24, 2008
  4. shankamoto

    shankamoto Member

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    Nov 21, 2007
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    Location:
    Missouri
    pilot brg

    The 31 to 39 chev used a brg pressed into the crankshaft :
    the org # 907109 changed to # 907321.
    the dimensions are : 19/32 I.D. x 1 13/32 O.D. x 11/32.

    www.obschevy.com
    has 907321

    hope this helps:)
     
  5. vwnate1

    vwnate1 Member

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    They're all pressed into the crankshaft , not the flywheel .

    The grease and dowel trick should pop it right out , remember sometimes the grease splatters so wear safety glasses .

    Your picture is very low resolution , it looks like a bushing to me .

    Either a bushing or roller bearing willwork , it's not a snug fit to the tranny shaft.
     
  6. Volker

    Volker Member

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    Thanks Nate

    if i check the bearing with my finger i feel the rollers therefore it must be a roller bearing. Because the weather in Germany is very good i build all parts together and drove today. It's a little bit loud but i know what's wrong and that's good. I will change the bearing later. I will go to the machine shop with the old bearing and let it produce.
    Thanks for your tip with the splashing grease. I think my face looks not so good with grease on it. Volker the grease monster :eek:

    shankamoto: obschevy don't have the roller bearing. They said it's hard to find.
     
    Last edited: Sep 25, 2008
  7. vwnate1

    vwnate1 Member

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    If the roller bearing has decent rollers in it (no bent ones) , I'd retain it as the roller bearing is the heavy duty part ~ can you shift into first or reverse without clashing the gears ? if so , the bearing is O.K. , wipe some of the Grease Monster grease off your face and onto your little finger , work it into the rollers and it should be good to go .

    Look closely at the tranny input shaft , if any ridges or roughness , wrap a strip of 1,000 grit or finer wet/dry emory paper / Crocus Cloth 'round it and work it until smooth , be 1000 % sure to get al the SWARF and abrasive etc. off before smearing the thinnest coat of grease on it .

    Now that you have the throw out bearing in your hands , press lightly on it with your fingertips and rotate it ~ ANY roughness or feeling of bearings moving , no matter how slight , means this bearing is junk .

    usually , if the ring on the clutch plate is flat , you want a round surface on the T.O. bearing and vice - versa , this allows the geometry to work out smoothly as the bearing moves in and out depressing the clutches operating ring .
     

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