BELT-DRIVE WALK BEHIND MOWER
27
Understanding the Safety Interlock System
The safety interlock system is designed to prevent
the mower blades from rotating unless:
• Operator presence is detected when either
OPC lever is in the operating position.
• The blade control switch (PTO) is pulled on.
The safety interlock system is designed to stop the
mower blades if you release both OPC levers while
the PTO switch is in the engage position.
Checking the Safety Interlock System
1. With the park brakes "ON" (locked), the
transmission in position "N" (neutral), and the
blade switch "OFF" (down), start the engine and
set the throttle to an idle.
2. While standing in the operator zone with the
OPC levers "UP" (released), pull the blade
switch up to the "ON" position, the engine
should begin to die.
3. Before the engine stops, push one of the OPC
levers to the "DOWN" (engaged) position, the
engine should continue to run.
4. Release the OPC lever, the engine should
begin to die.
5. Before the engine stops, move the other OPC
lever to the "DOWN" (engaged) position, the
engine should continue to run.
6. Release the OPC lever, the engine should
begin to die.
7. Before the engine stops, push the blade switch
down to the "OFF" position, the engine should
continue to run.
8. Ensuring that the park brakes are still "ON"
(locked), move the transmission lever to
position "1" (slow), the engine should begin to
die.
9. Before the engine stops, push one of the OPC
levers to the "DOWN" (engaged) position, the
engine should continue to run.
10. Release the OPC lever, the engine should
begin to die.
11. Before the engine stops, move the other OPC
lever to the "DOWN" (engaged) position, the
engine should continue to run.
12. Move the transmission lever to position "N"
(neutral) and release the OPC lever, the engine
should continue to run. Shut the engine off by
turning the ignition key to "STOP".
If the Safety Interlock System does not appear to
be working correctly it must be repaired before
allowing anyone to operate the machine.
CHECK FOR LOOSE HARDWARE
Service Interval: Before each use or daily
1. Stop engine, wait for all moving parts to stop
and remove key. Lock both parking brakes.
2. Visually inspect machine for any loose
hardware or any other possible problem.
Tighten hardware or correct problem before
operating.
SERVICE AIR CLEANER
Service Interval: 250 Hours
1. Stop engine, wait for all moving parts to stop
and remove key. Engage parking brakes.
2. See the Engine Owner’s Manual for
maintenance instructions.
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