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AC HD-5 Track master pin

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Andy H.

07-04-2004 10:32:28




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I hope that someone who has removed this pin could really help this novice. The service manual instruction is to "Drive the track pin out with a sledge hammer and a driving bar". Using a bucking bar on the "inside". I have rounded both ends of my brass driving pin and broke one hammer and can't get even the slightest indication of movement. I have used a can of penetrating oil too. heat? Please comment!

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Rock Picker

07-05-2004 21:23:10




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 Re: AC HD-5 Track master pin in reply to Andy H., 07-04-2004 10:32:28  
The only way I know is to heat the inner and outer rails (links). Heat the area near the pin (on both rails) until it is red hot. They will stay hot & expanded long enough for you to drive the pin out. You do need to put some sort of block between the inner rail and the machine to provide some support while pounding on the pin. There is always the argument about whether the heat weakens the rails, but I know know no other way to get them out. I used an Oxygen/Acetylene torch on mine. Been running the machine for about ten years since doing it, and no failures yet..... ..... ..FWIW..... RP

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KC in Ia

07-04-2004 12:42:31




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 Re: AC HD-5 Track master pin in reply to Andy H., 07-04-2004 10:32:28  
Put the brass drift back in the toolbox, you'll need to get a drift made of steel. Get it cut from stock next size smaller than pin. I'd weld a handle 2'long minimum about 2" from an end. Rebar works good for this.
Make sure you've located the master pin, ussually they have a dimple in center of end that the other pins don't.
Next get at least an 8lb. sledge and find a friend or maybe the better half that'll trust you enough to hold the drift pin. NOW commence to slugging it. You may need to heat the links with a torch. Have fun, used to turn track pins n bushings at work when first out of school.. have fun, KC.

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