MF FE 35 Key Switch

The key has four positions - HS - is about 12 oclock
H - is around 1:30
O - is about three oclock
S is at 4 oclock

The key rests at H and starts the tractor at HS.
Are the other positions for preheating or ???

Thanks for any help.

I expect I'll have a load of new questions once I get some time to play on this new old machine.

Douro Bob

Now, while I am waiting for my service manual to arrive (ordered it last week), does anyone have a copy of the wiring diagram from the key to the preheater that they could e-mail me or provide a link to - I thought Big Dean had one on his photo site but I've lost the link.

Thanks
Bob

O=off
H=preheat
HS=preheat and start
S=start without heat

The "O" position should line up with the key at rest.

In the H and HS positions, current should be directed from one key switch terminal to the thermostart (mini blowtorch) on the intake manifold, or through a resistor to the glow plugs on the Standard 4 cyl.

In the S and HS positions, current flows through another terminal through the neutral safety switch to the starter solenoid.

The third terminal is for input power, usually wired to the ammeter. That's helpful to see if the preheater is working or not. It was sometimes wired direct to the hot terminal on the ammeter (bypassing it) to keep the ammeter from pinning (full deflection) with the heavy current draw.

Provided..... the key switch is the original 3 terminal configuration, and wired correctly!

And thanks for the roses!

Jack