It appears spring has finally arrived in Southwestern Ontario so I decided I had better start working on the lawn mower deck for my 1050. Last year we had a wetter than normal summer which resulted in the deck getting a good work out and last fall the drive pulley on the lower shaft of the gearbox came loose and damaged the keyway in the pulley and the key seat in the shaft. I had noticed when I overhauled in about 2005 that there was a bit of wear in the keyway but it had worked until last year although every few years the roll pin for the gear on the vertical shaft would break and I would have to take the gear box apart and replace it. Last fall I did a quick fix by drilling another hole in the side of the pulley and adding a third set screw with the intentions of repairing it over the winter but that didn't quite happen. About a month ago I checked with Rick Show and he had a new pulley and vertical shaft at a reasonable price so I purchased them from him along with a new key, roll pin and a new spring for the belt. I compared the shaft and pulley today with mine and I think I can repair mine but I have the new pulley and shaft as a back up plan. The one thing I did notice is the hole for the roll pin in the vertical shaft is worn compared with the new one (you can just put a 1/4" drill bit through the new one by hand - whereas the hole in my shaft is 1/64" larger) which is probably why the roll pin in mine has been breaking every few years. The gears and the bearing in my gear box look to be in good shape so I will probably just leave them and replace the seals with new ones. The case has a piece broken out of it where the input shaft seal goes so I think I will try and repair that with JB weld. I had to use a puller to remove the PTO yoke on the horizontal shaft but the yoke came off fairly easy once the roll pin was removed - here are some pictures. I think I will try and sleeve my old pulley and try to build up the shaft where the key seat is and recut a new key seat.
Edited by 29 Chev, April 17, 2016 - 10:59 AM.