B7800 Pedal Problems?

DiezNutz · Jul 27, 2010

Classic seat bottom safety switch.

Pull the two wires off of the switch terminals, jumper them together - *but wrap them (e.g., with electrical tape) so they don't short to any other part of the tractor and blow a fuse* - and see if that doesn't solve your problem.

If it does, you need a new switch. Or, you can jumper the wires together permanently if you don't care for this "feature".

Temp97 · Jul 28, 2010

Dieznutz, Didn't get a chance to look at it last night but I will run that test tonight, thanks. Also Jonsstihl, it does run with the seat up and I was wondering why there were 2 switches.

DiezNutz · Jul 28, 2010

In case I wasn't clear enough, it's the seat bottom switch wires you want to jumper/test. Not the seat tilt switch (the one at the front edge of the seat) - it isn't your problem, you can leave it be.

The sole purpose of the tilt switch is to allow you to run the (rear only) PTO stationary while not sitting on the tractor. Normally if you had the PTO on and got up, the tractor would quit. Tilting the seat is an "override" that tells the tractor "I'm definitely not sitting on the tractor but I definitely want to run the PTO."

Everything you described is what happens when the tractor thinks you're not sitting on the seat *and* the seat isn't tilted - i.e., bad seat switch isn't closing the circuit.

orezok · Jul 28, 2010

Here's the Operator Presence Control manual pages for the 7800

Temp97 · Jul 29, 2010

DiezNutz said:
In case I wasn't clear enough, it's the seat bottom switch wires you want to jumper/test. Not the seat tilt switch (the one at the front edge of the seat) - it isn't your problem, you can leave it be.

The sole purpose of the tilt switch is to allow you to run the (rear only) PTO stationary while not sitting on the tractor. Normally if you had the PTO on and got up, the tractor would quit. Tilting the seat is an "override" that tells the tractor "I'm definitely not sitting on the tractor but I definitely want to run the PTO."

Everything you described is what happens when the tractor thinks you're not sitting on the seat *and* the seat isn't tilted - i.e., bad seat switch isn't closing the circuit.

Ooops, to late. I ran the test last night and read your new message this morning. I did what you said and taped the 2 wires together for the seat tilt switch (left one in pic) and it worked,, seat up, seat down w/PTO on... Now that I'm thinking of it I didn't actually sit on the seat to make sure there was pressure on the seat switch (round one),,,,