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ELECTRICAL SYSTEMS
Reverse Switch
Purpose
This switch works in the KeyChoice™ Reverse
Operating System circuit when the mower (PTO) is
engaged.
Location
The switch is located under the tractor frame, next to
the hydro pivot shaft and the hydro linkage (Figure
245).
Figure 245
How It Works
This single pole plunger type switch has two terminals.
When the unit is shifted in reverse while the mower
(PTO) electric clutch is engaged, the reverse switch
opens and will stop the electric (PTO) clutch, unless
the KeyChoice™ switch has been operated.
Testing
1.
Disconnect the switch from the wiring circuit.
2.
With a multimeter, check the continuity across the
terminals. There should be continuity.
4 - 14
3.
Depress the plunger on the switch and check the
continuity across the terminals, there should be
NO continuity (Figure 246).
Module Low Voltage/KeyChoice™
Reverse Operating System
Purpose
This module performs two functions. The functions are
low voltage detection and KeyChoice™ Reverse
Operating System control.
MVC-841F
Low Voltage - The illumination of the battery light on
the dash indicates the battery voltage is too low. This
is controlled by the low voltage module.
KeyChoice ™ Reverse Operating System - The
KeyChoice™ Reverse Operating System Module
works with the KeyChoice™ switch, PTO switch, and
the reverse switch. If the override switch (KeyChoice™
switch) is not activated and the PTO is engaged, it will
stop the electric PTO clutch.
Figure 246
400XT Series Tractor Service Manual
MVC-859F
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