Posted by NCWayne on March 27, 2016 at 21:49:02 from (173.188.169.54):
In Reply to: master pin hardness posted by Mr. T. Minnesota on March 27, 2016 at 08:01:45:
I've removed more than my share of master pins. You can not drill it out. The best way is to use a grinding wheel and grind down until you can see a crack around the edges of the pin. Once there, simply drive it out. If it was welded in, it's probably not that tight.
If you've got a small spike hammer, they work good as a punch because they have a handle for the other guy to hold. I know some will say don't hit one hammer with another, but between myself and my Dad, we've been doing it for at least 50 years, combined, and it's never been an issue. Another thing you can do us make a punch handle/holder from a piece of pipe, and just use an appropriately sized piece of round stock as a punch.
If your planning to put it back together you'll also need a few blocks as well as a pin a bit smaller than the master pin.
When your ready to wrap, put a block under the very end of the track and run the machine back to it. Let the sprocket pick up a link, and then walk the machine forward using a big bar to hold the end of the track up, and guide it up and over the top roller. If your alone, take a come-a-long and use it to keep tension on the track as you pull forward. Once at the front, and over the idler, put another block under the front end of the track and run the machine on forward until the holes line up. Put the small pin, or a bar, in the hole and back the machine up until the joint is back on the sprocket. With the block under the lower part of the track, the sprocket teeth will hold the top part in place and allow you to line up the pin holes and install the master pin without too much effort.
Good luck. On a machine that size it's not usually too bad, even for one man. When you get done you can come help me rewrap the tracks on a 963 CAT Tuesday...LOL
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