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Farmall & IHC Tractors Discussion Board |
Re: fan belts M and 450
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Posted by john d on July 10, 2004 at 11:14:44 from (64.12.116.14):
In Reply to: fan belts M and 450 posted by Hank on July 10, 2004 at 10:00:33:
The "trick" is to not get in a hurry and break something. The belt you're replacing may have been on there for 20+ years, and the threads on the split-sheave pulley on the fan hub have not been budged in that long. Look carefully, and you'll find a setscrew with a locknut on the front of the fan pulley hub. Loosen the locknut, remove the screw and locknut assembly totally (don't lose it!) and spray penetrating oil in the hole. Let it set while you get a hammer and long punch.
If the old belt is still on there, cut it off to get it out of the way. With that belt out of the way, TAP the square boss on the fan pulley hub (where the setscrew came out) with the hammer and punch. DO NOT HIT IT HARD, OR YOU WILL BREAK IT!
If you can make it turn a little, then tap it the other way for a while. It will help if you first brush the dirt off the threads in front of the pulley sheave. Oiling these threads is also a good idea.
Once you get it to move, then turn it back and forth until it is completely loose. The new belt can be looped over the fan, into the fan pulley, and then onto the crank pulley. Tighten the fan pulley sheaves to tighten the belt. Replace the setscrew and lock nut when finished.
Just take your time and don't get frustrated enough to clobber it with the hammer. It's really a pretty good setup, but when they haven't been moved in a long time, they can be trouble.
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