I've been tearing down my Speedex last couple days. Most of tin is off now, cept the rear pan, as it has all the hoses running up thru a big hole in it. Will be coming off, just didn't wanna mess with the oil today. I want to get it down to power-wash it This thing has a short driveshaft between engine and hydro motor. Two rag joints. I was looking at it to turn and see if trans would move and found it to be real sloppy on the hydro shaft, yet it didn't just pull off. Plastic fan on that end with big spring. SO, pulled back on fan which was hard to do and keep back, found a snap ring way out on edge. Hmmm! Thinking might have to remove that to let fan move and see a set screw or pin??? So got that ring off and also found cut-out in fan hub or it was broken out maybe. Anyway, with that slid ahead was able to see what looked like set-screw hole. NO allan would fit it seemed, metric included. Finally got light and found the screw WAS moving, but not coming out. Ended up drilling it out and still had to drive it off the shaft after it pulled half way easy. After off, found a sheared key in the shaft and a BIG hole and was made bigger by flopping for long time in the set-screw hole. The pulley keyway was worn one way, say 3/8" slop! Key hole was also way big right up by shaft area, about same distance and found some set screw end there. SO, has been wobbling awhile and messed up both peices. Think the hydro shaft will be OK, with good key. It came out easy and no damage to the slot in shaft. Set-screw hole is kinda big and deeper than stock. Hoping maybe a bigger screw would be used there and be good. But now when I found that keyway damage in pulley, think it can't be used. I have no way of fixing in mind. I have the Other tractor to check on for that part next.
I was also turning the input shaft on hydro by hand and there is no movement of anything at wheels. Is it just because I can't spin fast enough or a problem? I would like to use my drill to turn, but would have to make up a coupling to get from 3/4" down to 1/2 to fit the drill, then even that is a slow drill. Should that work? Or will I need a faster drill and make it down to 3/8" to do that?
Can a hub center be bought that fits the 3/4" shaft on hydro that you need to weld on the pulleys or spockets and maybe mount my coupler blades for joint on it? Would think the keyway's would be same sizes for the shaft? Maybe Would need to drill and tap to move set-screw to the side and on good metal of shaft? OR, does that screw need to pull directly accross from the keyway?