ih 544 hydro non-diesel how to disengage hydro to tow

Looking to find how to disengage hydro transmission to be able to pull onto trailer without having the rear wheels locked up. This has the two hand levers, one to the left and one to the right of the steering wheel. Right seems to have three positions (guessing forward, neutral, and backwards). Left lever has two positions ( engaged, not engaged (?) ). Left pedal linkage connected to left lever (clutch of some kind ?). Right two pedals are brakes. Is there a disengage lever or similiar somewhere so it can role freely or is there no options like this posible on this model ?

Thanks in advance for your wisdom on this !
Dave

Allan

Yank the cushion valve and check the keeper/snap ring. Usual cause of that “jump” business.

Allan

Meant to say "shuttle" valve.

Anyway, the valve is accessed in behind this plug. There is a snap ring on the far end of the valve that has a nasty habit of breaking. When it does, the valve can't find "home/center" and this makes the tractor do that "jump" thing when the left lever is moved away from neutral.

Probably the easiest repair on this Hydro other than adjusting the dump valve.

Allan

So, the next time the controls are used (pedal/lever), the tractor wants to go right back to the same operating mode it was in the last time it was engaged.

Kinda like when the carb linkage falls off a carb. There is no "return" and ya get what ya had. :>)

Hope that makes sense. :>(

Allan