Re: Simplicity hydro trans locked up

Posted by Geo-TH,In on June 04, 2017 at 04:37:56 from (172.78.57.242):

In Reply to: Simplicity hydro trans locked up posted by Greg north on June 03, 2017 at 17:26:53:

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.

Check to make sure brake isn't froze up.

geo.

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