SAFETY
Safety - 17
Operator Interlock Systems
The operator interlock systems:
• prevent the engine from starting unless the selector lever is in the park position.
• prevent the PTO clutch from engaging unless the operator is present on the seat and activates the PTO.
• Deactivates the PTO if the operator leaves the seat.
• prevents the power unit from moving unless the parking brake is released and the operator is pres-
ent on the seat.
Park the power unit on a level surface. Lower attachment to the ground and turn off power unit engine.
Chock tires to prevent rolling. Ensure the operating area is free of obstacles and bystanders.
Perform the following tests:
• The Ignition Circuit
• Sit on the seat.
• Place the power unit’s selector lever in the park position. Turn key to ‘start’. Starter should engage.
• Place the power unit’s selector lever in the neutral assist position. Turn key to ‘start’. Starter should
NOT engage.
• The PTO Circuit - Operator Presence
• Sit on the seat.
• Turn the ignition key to the ‘run’ position. (Do not start the engine for this test.)
• Press top portion of the PTO switch to activate the PTO. The PTO clutch should audibly engage.
• Rise off the seat. The PTO clutch should audibly disengage.
• Return to the seat with the PTO switch still activated. The PTO clutch should NOT engage.
• Turn the key to the ‘off’ position.
• Press the bottom portion of the PTO switch to turn the switch off.
• The PTO Circuit - Operator Interlock
• Sit on the seat.
• With the key in the off position, press the top portion of the PTO switch to activate the PTO. The PTO
clutch should NOT engage.
• With the PTO switch still in the on position, turn the key switch to the on position. The PTO clutch
should NOT engage.
• Press the bottom portion of the PTO switch to turn the switch off.
• Press top portion of the PTO switch to activate the PTO. The PTO clutch should audibly engage.
• S.D.L.A. Control Lever - Operator Presence
• Sit on the seat.
• Place the power unit’s selector lever in the easy shift position.
• Rise off the seat and simulate forward/reverse motion by attempting to move the S.D.L.A. control
lever forward and rearward. S.D.L.A. control lever should NOT move forward and rearward.
Place the power unit’s selector lever in the park position and remove the wheel chocks.
• S.D.L.A. Control Lever - Parking Brake
• Sit on the seat.
• Start the power unit engine.
• With the selector lever still in the park position, move the S.D.L.A. control lever forward and rearward.
The S.D.L.A. control lever should move forward and rearward, but the power unit should NOT move.
• Place the power unit’s selector lever in the neu-
tral assist position.
• Slowly move the S.D.L.A. control lever forward
and rearward. The power unit should drive accord-
ing to the input of the S.D.L.A. control lever.
If any test fails, do not operate. Repair before operating.
Alterations or modi
fi
cations to this machine can
reduce safety and could cause damage to the
machine. Do not alter safety devices or operate
with shields or covers removed.
KT4100 Safety Procedures
