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post #1 of 6 Old 11-18-2015, 07:10 AM Thread Starter
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disaster avoided

whew...just wanted to mention this, as I have not had this happen in over 40 years of fixing stuff, and is something I will now check, and feel others should check, as part of maintenance, repair. I am starting to put the re-build back together. on the gearbox ,I replaced the bushings and seals where the auger shaft runs through . everything seemed smooth and snug, no leaks. great right? wrong !!... as I was waxing ( yes I wax also ) the impeller before putting the auger on the shaft, I noticed the slightest bit of movement, so small I did not notice when I put the seals in. (see waxing helps in more ways than one..lol ) that movement just should not be there so I disassembled it again. it turns out that the "movement" was from a very brittle pin that holds the auger shaft to the 3" gear inside. I took it out easy enough and in one piece ,and figure because of the age the roll pin had become brittle. I removed it and reinstalled it and did not notice how weak the metal had become .I could break it with very little effort. that could have ruined the gearbox. I will never reuse a roll pin again. lesson learned
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post #2 of 6 Old 11-18-2015, 07:20 AM
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Thanks for the heads up on that. You're experience just might save somebody else along the way.

I'm pretty much retired from the forum thing, but I check in every now and then.
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post #3 of 6 Old 11-18-2015, 11:22 AM
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I've never had that happen with a role pin before but thanks for the heads up. Something to watch for.
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post #4 of 6 Old 11-19-2015, 05:14 AM
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Very interesting. What type of gear box are we talking about? I have only had one type apart and it was all key-driven. If you're talking about the old, Helicon cast iron boxes, you're scarin' me, man, because I have three of them.....
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post #5 of 6 Old 11-21-2015, 09:12 AM Thread Starter
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Quote:
Originally Posted by bwright1818 View Post
Very interesting. What type of gear box are we talking about? I have only had one type apart and it was all key-driven. If you're talking about the old, Helicon cast iron boxes, you're scarin' me, man, because I have three of them.....
yes, the cast iron box. its the 910954 tractor. it was the roll pin that holds the small gear to the auger shaft. it came out ok ,went back in ok, and came out again ok. but it was the slightest bit of movement that I knew some thing was wrong. it had to be the age and it just became weak and brittle. I have no doubt it would have given out during operation. I could snap it with my hand. but going straight in and out with a roll pin punch it was not noticeable. I thought it was important, as I have never seen this before with a roll pin. (age) I will not reuse them any more. it could have destroyed the gears and or the cast iron box. for a couple of dollars I will not take that chance anymore
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post #6 of 6 Old 11-21-2015, 09:36 AM
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I had a roll pin fail on my Sears/Murray in one of the drive chain axels about 800' from my garage. I cannot fault it because it was 40 yrs old at the time. There is a bolt in there now. It should outlast me.
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