Subject: Six pinion question
From: ACRE
Date: 11/29/2003, 11:06 PM


 > Hey guys instead of ripping out those roll pins try coating a steel wire
 > with a diameter a little smaller than the inside diameter of the roll pin
 > with epoxy. Stick it in the roll pin and let it set up. Then pull it and
 > the roll pin out. If the roll pin is one inch long and the inner diameter
 > of the roll pin is .050 the force generated by a 3000 psi epoxy bond will
 be 480
 > pounds roughly. Bond area is .050 times 3.1416 times one inch long or .16
 > square inches... times the 3000 psi  shear strength of epoxy or 480
 pounds.
 >
 > Clean the roll pin out with acetone before you try to bond to it.
 >
 > Not my idea. I forgot who came up with it but it is a good one.

 I tried a few things

 > Paul Lamar

 Ken
 See comments above as well!!

 I agree with Paul that it won't take much to pull the little suckers out
 once you can get hold of them.

 A neat little tool would do the job so much better than epoxy,  which is a
 little fiddly but could possibly work.

 What would work is a bit of carbon wire, bent over at the end and hardened.
 I tried this but I didn't have another piece to prevent it from pulling out.
 Your damaged housing is an indicator of the pin removal problems - I don't
 like damaging things if it's unavoidable.

 There must be a tool available -what do the Ford Transmission guys use !!?

 BTW Ken the shaft on the 2.85 is 3/8", which would bring the bolt diameter
 to about 1/4"
  The shaft on the 6 planet 2.17 steel housing is 1/2" because the planets
 are a lot bigger!!

 Paul, If you like I could do-up a short paper on Ratios, if you like - might
 save a lot of explaining to any new chaps who might ask.

 George (down under)


Sure. That would be great.

Paul Lamar


    The transmission guys just replace the whole planet.
    Definitely going to have to go to hardened bolts with those numbers,
    the 2.17 - 3.17 three pinion has a 15mm - .590 shaft which would have left
   enough room for bushing but not so on the later ones.

   Ken

 
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