The Safety Interlock System - Toro 38988 Operator's Manual

Figure 11
1. Throttle lever
2. Operator Presence
Control levers (OPC)
3. Handle
Disengaging the Mower Blades (PTO)
The mower blades can be disengaged by one of the
following steps.
1. Push the blade control knob (PTO) down to off
(Figure 11).
2. Releasing the Operator Presence Control (OPC)
levers will kill the engine and stop the blades
(Figure 11) with the blade control lever engaged.

The Safety Interlock System

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.
Understanding the Safety Interlock
System
The safety interlock system is designed to prevent the
mower from starting unless:
• The blade control knob (PTO) is pushed off.
• The speed control lever is in neutral.
4. Drive Lever
5. Blade control knob (PTO)
The safety interlock system is designed to kill the
engine when:
• The Operator Presence Control (OPC) levers are
released with the mower engaged and/or the speed
control is out of neutral.
• The speed control lever is shifted out of neutral
without holding OPC levers or with the brake
engaged.
• The blade control knob (PTO) is pulled up without
holding the OPC levers.
Testing the Safety Interlock System
Test the safety interlock system before you use the
machine each time. If the safety system does not
operate as described, have an Authorized Service
Dealer repair the safety system immediately.
While testing the safety interlock system, the
machine may move forward and cause personal
injury or property damage.
• Perform the safety interlock test in an open
area.
• Ensure no one is standing in front of
the machine while performing the safety
interlock test.
1. Set the neutral locks and place speed control lever
in neutral.
2. Start the engine; refer to Starting and Stopping the
Engine.
3. Without holding the Operator Presence Control
(OPC) levers, pull the blade control knob (PTO) up.
The engine should kill.
4. Push the blade control knob down to off.
5. With engine running, hold down the OPC levers.
Pull the blade control knob (PTO) up. The drive
belt should engage and the mower blades begin
rotating.
6. With engine running, release the OPC levers. The
engine should kill.
7. With the engine running, move the speed control
lever forward slightly. Release the OPC levers. The
engine should kill.
8. If all the above conditions are not met have an
Authorized Service Dealer repair the safety system
immediately.
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