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Ford lgt18h hydro problem

470 Views 2 Replies 2 Participants Last post by  pmm289
Hello all,

I'm trying to troubleshoot an issue with a 1989 lgt-18h with an Eaton 1100 and can't help but think I'm missing something so figured I'd see what advice you can give me.

While mowing, I all of a sudden lost pressure in the forward/reverse hydro pedals. Normally there is some resistance when pushing on the pedals but now there is none.

I figured it was a linkage issue, but can't seem to find anything broken externally. When putting the mower in neutral, I can push it around, and when putting it in low or high range, I can push it slightly but can feel the hydro give some resistance once it starts to move. The hydraulic lift for the deck still works as well. I checked the fluid level and it was a little low, so I topped it off. Was about a 1/4" shy of the full mark on the dipstick which didnt seem that low.

Part of me still thinks it's a linkage issue given the change in feel of the pedals and the fact that the hydraulic lift still works, but unless there is an internal linkage for the pedals I can't find anything out of place externally. Anybody have any advice or thoughts on what could cause this and what else I can check?
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I know there could be a release lever, but not that I am aware of. My assumption is that since it has a hi/low/neutral range, that neutral is used as a release lever. The thought that this could be broken crossed my mind, but externally the gear selector is working fine and I can tell the difference between neutral and putting it in gear.

There is a relief valve it seems. Looking at the manual it is internal in the Hydro, so not easily accessible. It consists of a ball and a spring, held in place by a screw in plug or set screw. Seems hard to imagine that coming out but anything is possible.
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