Checking The Interlock Switches - Toro 03806 Operator's Manual

Figure 39
1. Bypass valve
2. Close the bypass valve before starting the engine.
However, do not exceed 5-8 ft.-lb. (7-11 N·m)
torque to close the valve.
Important: Running the engine with the
bypass valve open will cause the transmission
to overheat.
Checking the Interlock
Switches
If safety interlock switches are disconnected
or damaged the machine could operate
unexpectedly causing personal injury.
• Do not tamper with the interlock switches.
• Check the operation of the interlock
switches daily and replace any damaged
switches before operating the machine.
• Replace switches every two years regardless
of whether they are operating properly or
not.
The purpose of the interlock switches are to prevent
the engine from cranking or starting unless the traction
pedal is in Neutral, the Enable/Disable switch is in
Disable and the Lower Mow/Raise control is in the
neutral position. In addition, the engine will stop when
the traction pedal is depressed with either the operator
off the seat or the parking brake engaged.
To verify interlock switch function:
Service Interval: Before each use or daily
1. Park machine on a level surface, lower the cutting
units, stop the engine and engage the parking brake.
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2. Open control panel cover. Locate wire harness and
loopback connector. Carefully unplug loopback
connector from harness connector (Figure 40).
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1. Loop-back connector
3. Connect the Diagnostic ACE display connector
to the harness connector (Figure 41). Make sure
correct overlay decal is positioned on Diagnostic
ACE display.
1. Diagnostic ACE
4. Turn the key switch to the On position, but do not
start machine.
Note: The red text on the overlay decal refers to
input switches and the green text refers to outputs.
5. The "inputs displayed" LED, on lower right column
of the Diagnostic ACE, should be illuminated. If
"outputs displayed" LED is illuminated, press and
release the toggle button, on Diagnostic ACE, to
change LED to "inputs displayed". Do not hold
button down.
6. The Diagnostic ACE will illuminate the LED
associated with each of the inputs when that input
switch is closed.
Individually, change each of the switches from
open to closed (i.e., sit on seat, engage traction
29
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Figure 40
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Figure 41