Greg, I recently helped two neighbors getting their craftsman riding mowers running. One had a locked up HST. The brake was rusted because owner left it out in the rain.
The other the HST stopped working after owner pulled it out of the shed. I got engine running and HST wouldn't work. After researching I discovered many have Issues with craftsman HST. The only way to service tranny is to remove transaxle, open vent cover, drain out fluid, refill, then purge air out of tranny by turning the input shaft. I just jacked one side of mower while owner sat on seat, started engine and put it in gear. I rotated the wheel in the air. Slowly it started turning on it own. We went from forward to reverse many time. It's now working. Thinking when he pulled it out of shed, he didn't have control rod pulled out and somehow he got air in tranny.
I used to be a big fan of HST's on mowers, but rethinking that they may be very easy to damage. However my 20 year old JD275 has a place to drain tranny, replace filter and add oil without pulling tranny out and turning it over. It a garden tractor, not a cheaper lawn mower.
I worked on husky with only 350 hrs. The HST sounded like it was full of broken glass. Owner abused mower by pulling heavy loads with it.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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