I have a Troy Bilt horse that has 2 belts, one for the 2 blades on the deck and a drive belt that runs the hydrostatic transmission.
The transmission belt broke, and I can't figure out how to get to the rear portion of it that changes. I have linked to 2 pictures:
The one with the fain in it is an overhead view below the battery and on top of the transmission on the back of the mower.
The second is the breakout of this section of the parts list.
I need to take the nut on top of the fan off to get the belt around the pully (you can see the bracket that the pully sits "in" in the breakout. I have 2 problems:
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How do I get a wrench around the nut above the fan? There's no room.
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How do I keep that from turning? I can turn the fan by hand if the brake is on or not, and if the transmission is engaged or not. There is a pull-out lever that disengages the transmission, but that pully always freely turns so when I get a wrench around it I cannot stop the shaft and everything from turning.
How do I do this? Pictures are here:
http://imgur.com/a/N2zA7 and inline
Best Answer
It's fairly typical for lawnmowers to have guards like part #57 which make it difficult but not impossible to get the belt on. They're more concerned with making it difficult for the belt to come off. Though, this also helps keep it in place while you fiddle with the other end. You may need to strongarm it a bit, but try to bend them back to the original positions.
If you really want to get the fan off, you need a crow-foot wrench and will probably need to hold the pulley with a strap wrench and work against that. Don't be surprised if it's a reverse thread. The pulley will be splined to the shaft.
I've recently seen a suggestion to hold the pulley by twisting the belt with a flat nail bar. Then put a short 2x4 between the nail bar and frame.