Tl-70 Hydraulic Leak

[Fred185]

The disc is probably just a protective shield. Should it be replaced? I wouldn't unless it's damaged, and my guess is that it probably isn't. I think if you remove the drive shaft, and the first snap ring the disc should be removable without disturbing anything else or draining the fluid yet.

Harry,
Today was the big day I started the repair. After the PTO cover was removed everything changed. I could see the oil leak and it was not the rear PTO seal. It was where the rear hydraulics Body and transmission Body bolt together. Oil was leaking out of this seam at the bottom, directly into PTO shield about 6-inches from rear end of PTO shaft. I would say the 18-mm bolts were loose, could turn several by hand. I went thru shop manual looking for proper torque of bolts. As best as I could locate 72-FP. Torqued all I could reach the same. Looks good so far, but did not use the tractor yet. I had similar problem with several riding law mowers. Always had to replace the oil pan gaskets. I hope that's not the case with this leak. That would be a very major job, involving lifting cab off body. I don't think I would attempt to tackle that.

 

[Fred185]

Harry,
Today was the big day I started the repair. After the PTO cover was removed everything changed. I could see the oil leak and it was not the rear PTO seal. It was where the rear hydraulics Body and transmission Body bolt together. Oil was leaking out of this seam at the bottom, directly into PTO shield about 6-inches from rear end of PTO shaft. I would say the 18-mm bolts were loose, could turn several by hand. I went thru shop manual looking for proper torque of bolts. As best as I could locate 72-FP. Torqued all I could reach the same. Looks good so far, but did not use the tractor yet. I had similar problem with several riding law mowers. Always had to replace the oil pan gaskets. I hope that's not the case with this leak. That would be a very major job, involving lifting cab off body. I don't think I would attempt to tackle that.

The picture was taken before I started the job.

 

[Harry in Ky]

I don't think there is a gasket there. Just a sealant. Tightening the bolts back up will of course greatly reduce the leak, but a certain amount of seepage may still be present. hopefully not enough to be a problem. I don't exactly "torque" those bolts, I just get them as tight as I can then give them a little bit more. That's always worked for me.

 

[Fred185]

I don't think there is a gasket there. Just a sealant. Tightening the bolts back up will of course greatly reduce the leak, but a certain amount of seepage may still be present. hopefully not enough to be a problem. I don't exactly "torque" those bolts, I just get them as tight as I can then give them a little bit more. That's always worked for me.

Sorry it took so long to reply. Tightening the bolts seem to of ended the leak completely. The floor is so dry I thought I had no hydraulic fluid to loose. But it looks good. I now have another problem a air conditioning leak I can't find. I am a retired HVAC mechanic, but this leak can't be found after a week and changing the compressor. It was the only part of the system impossible to check with engine running. I lose the entire 3.5 lbs in less than a day. I have dye in the system and all but put the tractor under soapy water to find the leak. Can't afford to keep dumping 134a into a system. I am leak checking with compressed air.