How It Works; Testing; Neutral Safety Switch; Purpose - Toro 22317 Service Manual

4-PAW GAS/ELECTRICAL

How It Works

The fuse block is where the wires that carry 12 volts
meet the wires that need 12 volts to operate a compon-
ent or function. The fuse makes the connection between
the 12 volt wire that needs the current.

Testing

A failed fuse will often be discolored or melted. Please
note that not all fuse failures are easy to see. A fuse
can be checked with a continuity tester if there is doubt.
If there is no continuity between the fuse terminals,
replace the fuse, even if it appears good.

Neutral Safety Switch

Purpose

The normally closed ball type switch is used on the
4-spool hydraulic valve. This is a safety switch to make
sure the control levers are in the neutral detent (Fig.
1214).
5/5-4
Fig. 1214 IMG-0547a

Location

There are 2 neutral safety switches. They are threaded
into the lower portion of the 4-spool hydraulic valve,
located under the upper frame assembly (Fig. 1215).
How It Works
The switch has a spring loaded ball. When the hydraulic
4-spool valve forward and reverse control handles are
in the neutral position, the ball moves into a machined
notch located in the spool. The normally closed switch
then provides a ground to the start circuit. When the
4-spool valve forward and reverse control handles are
moved out of neutral, the spool pushes against the ball
end of the switch and opens the ground circuit which
prevents the engine from starting.
Testing
1. Disconnect the switch from the wire harness. The
ball end of the switch should remain installed in the
hydraulic 4-spool valve.
2. Set the VOM multimeter to the ohms setting.
Connect the leads to the two wire terminals. Move
the hydraulic 4-spool valve lever to either the
forward or reverse position. There should be NO
continuity.
Toro Wheeled CUL Service Manual
Fig. 1215 DSC-3362a