Actonhorse 26 #1 Posted August 10, 2014 I did a complete rebuild on the transaxle on this unit over the winter and it is working really well for mowing except for a couple of things. As I mow with it the transaxle heats up like normal and it has lots of power in forward and reverse but when I park it there seems to be excessive pressure build up in the transaxle. When I am done mowing I pull the dipstick and hear a good "pop" of pressure release. Is this normal? Is there supposed to be a breather in this system? If I don't pull the dipstick the right side axle seal always leaks. I put new axle seals in this unit when I rebuilt it and have already tried changing the right side one but it still leaks. I did read in another thread that some of the hydrostatic models have a breather built into the dipstick. Is this the same on the sundstrand 90? I am thinking about trying a double seal on this axle but it feels like the pressure will just blow that one out as well. I have looked through the manual and don't see anything that indicates a breather in this system. Any help would be appreciated. Share this post Link to post Share on other sites
608KEB 795 #2 Posted August 10, 2014 If you have a manual. Go to page 17.Read through that it may help. Share this post Link to post Share on other sites
Molon_Labe 731 #3 Posted August 10, 2014 Cut the crimped end off the dipstick handle and you'll have a vent, did it to mine and it works like a charm. Share this post Link to post Share on other sites
Actonhorse 26 #4 Posted August 10, 2014 I do have the manual and page 17 doesn't really say much except to give me an index for differrent parts.... I don't see a crimped end... Share this post Link to post Share on other sites
Molon_Labe 731 #5 Posted August 10, 2014 Here's what mine looks like now Share this post Link to post Share on other sites
SpillerMiller 10 #6 Posted August 10, 2014 Glad I read through this. You may have just given me the solution for the same problem 1 Share this post Link to post Share on other sites
