Auxiliary Neutral Switch; Purpose; Location; How It Works - Toro 22317 Service Manual

Auxiliary Neutral Switch

Purpose

The normally closed ball type switch is used on the
hydraulic auxiliary valve. This is a safety switch to make
sure the hydraulic auxiliary valve is in the neutral detent
(Fig. 1216).

Location

The neutral switch is threaded into the lower portion of
the hydraulic auxiliary valve. This valve is located on the
right side of the upper frame assembly (Fig. 1217).
Toro Wheeled CUL Service Manual
Fig. 1216 IMG-0547a
Fig. 1217 DSC-1379a
4-PAW GAS/ELECTRICAL

How It Works

The switch has a spring loaded ball. When the hydraulic
auxiliary valve is in 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 auxiliary lever is 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 auxiliary valve.
2. Set the VOM multimeter to the ohms setting. Con-
nect the leads to the two wire terminals. Move the
hydraulic auxiliary valve handle to either the reverse
flow or forward flow position. There should be NO
continuity.
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