I have an '89 1810 with a hydro issue. I'm pretting sure it's a Sundstrand 782. It wouldn't go forward or reverse on Saturday. I drained the trans fluid and it was not low. I pulled the check valves and cleaned them and reinstalled. When I went to replace the filter, I noticed that the rubber bushings on the drive shaft had worn a hole in the filter or something did. Would that hole have cause the issue with the tractor not moving? It was not spraying trans fluid out the hole so I don't know if there is pressure on the filter side or not. I have had problems with wobble in the drive shaft ever since I put in a new block 4-5 years ago. I have gone through two of the coupling arms on the hydro shaft and now the hole in the hydro shaft is getting ovalled out. WHen I replace the couple arm with the bearing the hole in the hydro shaft is bigger than the rolled pin that fits in the hole in the coupling arm so I get play in the drive shaft and the pins shear off. I am tempted to try to drill out the hole in the coupling arm in order to use a bigger pin but it's forged and that might not be an option. It's either that or get a rebuild hydro unit with a shaft that isn't worn. I do not want to tangle with trying to rebuild the pump myself plus we have been getting a lot of rain and the grass is growing like crazy. I'm almost tempted to throw in the towel and get a new tractor but I highly doubt the new ones are built as well as this.
Has anyone else had problems with drive shaft wobble and the hydro shaft holes getting rounded out? I'm getting real timed of fixing this thing. Thanks for any help you can provide.