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Figure 19
1. Handle
2. Operator Presence
Control levers (OPC)
Disengaging the Mower Blades (PTO)
1. Release Operator Presence Control (OPC) levers to
disengage blades (Fig. 19).
The Safety Interlock System
Caution
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 switch (PTO) is off.
The speed control lever is in neutral.
The safety interlock system is designed to kill the engine
when:
The Operator Presence Control (OPC) levers are
released while the speed control is out of neutral
position and/or the mower is engaged.
The speed control lever is shifted out of neutral
without holding OPC levers.
3
2
1
4
m–6638
3. Blade control switch
(PTO)
4. Drive Lever
22
The speed control lever is shifted out of neutral with
the parking brake set.
The blade control switch (PTO) is pulled on 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.
1. Set the neutral locks and place speed control lever in
neutral. Start the engine; refer to Starting and Stopping
the Engine, page 20.
2. Without holding the Operator Presence Control (OPC)
levers, pull the blade control switch (PTO) up. The
engine should kill.
3. With the engine running, hold down the OPC levers.
Pull the blade control switch (PTO) up. The clutch
should engage and the mower blades begin rotating.
4. Release the OPC levers. The engine should kill.
5. With the engine running, move the speed control lever
forward. Release the OPC levers. The engine should
kill.
6. With the engine running, set the parking brake and
hold down the OPC levers. Move the speed control
lever forward. The engine should kill.
7. If all the above conditions are not met have an
Authorized Service Dealer repair the safety system
immediately.
Driving Forward or Backward
The throttle control regulates the engine speed as
measured in rpm (revolutions per minute). Place the
throttle control in the Fast position for best performance.
The forward speed of the machine can be increased or
decreased by moving the speed control lever while the
machine is in motion.
Forward
1. Release the parking brake; refer to Releasing the
Parking Brake, page 21.
2. To go forward, move the speed control lever to desired
speed.
3. Release the neutral lock. Refer to Releasing the
Neutral Lock on page 21.
4. Slowly release the drive levers to move forward
(Fig. 20).
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