Tilt seat -- theory of operation

[MikeOConnor]

Got past 10 hours without breakin' nothin' on the 1850 -- busted a stem off a tire at 12 hours. 'Sure is nice to have duallies to get me home to the air wrench. <grin>

Here's my newbie question of the week. Every once in a while the tilt seat "loses it's mind." It's almost as though it's getting it's tilt-sensing reversed and goes the opposite direction than it should. It just about dumped me off the PT before I realized what was going on.

It's an intermittent problem (aren't all the interesting ones?) but in the two times it's happened it didn't happen at the beginning of the tractor session. And both times, it's started after I stopped and restarted the tractor on a slope.

I've now met the owners manual -- and have to say it's ranking right up there as one of the worst I've ever seen. So I turn to you all. Has anybody torn into the seat circuits, sensors and hydraulics enough to describe how it's deciding what to do? Has anybody run into this problem and come up with a fix?

One thing I noticed was that I could "convince" it to swing the seat back where it was supposed to be, by leaning really hard on the seat. But when it decides to zig when it should zag it does it with a vengance and it takes a while to "force" it back to the right position.

thanks!

m

 

[Charlie_Iliff]

On my 1845, there was intermittent interference between the throttle cable and one of the wires to the tilt seat solenoid.
Assuming that isn't the problem, the mercury switches in the box on the back of the seat are adjustable, but there isn't anything in the book to tell you what angle to set them at, and they have to be held tightly while tightening the mount screws after adjustment. I fiddled with them for a couple of weeks before I got them where I liked them, at a little steeper angle and thus less sensitive than the way they were when it came.
Good luck.

 

[blackwell]

Adjust the mercury switches on the back of the seat. Tilt down to get less bounce, up for more. As you hit rough spots the mercury bounces and causes the seat to hunt for the correct position. Do not rotate the switch in the clip, the dampening fingers must remain vertical.
EB