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500Z 26HP - 48" Mower Deck
Perform the
Safety Checks
WARNING
Disengage the PTO, stop the engine, set the parking
brake, and wait for moving parts to stop before
leaving operator's position for any reason.
If the tractor does not pass the test, do not
operate tractor. Under no circumstance should
you attempt to defeat the purpose of the safety
system.
Functional Tests
1. Check the tractor for loose bolts, screws, nuts, etc.
2. Start the engine and check all the controls for proper
operation: ground speed control levers, parking
brake, throttle cable, electric PTO clutch, etc.
3. Stop the engine and check for fluid leaks: oil, fuel
and hydraulic oil.
4. If any control fails to operate properly during testing
or seems to be out of adjustment, check and readjust
it according to the following Adjustments section.
TP 300-7368-IR-ZT-N
SAFETY INTERLOCK
SYSTEM
This unit is equipped with safety interlock switches.
These safety systems are present for your safety, do
not attempt to bypass the safety switches, and never
tamper with the safety devices. Check their operation
regularly.
Operational SAFETY Checks
Test 1 — Engine should NOT crank if:
• PTO switch is engaged, OR
• Parking brake is not engaged, OR
• Ground speed control levers are not in the
NEUTRAL position.
Test 2 — Engine SHOULD crank if:
• PTO switch is NOT engaged, AND
• Parking brake is engaged, AND
• Ground speed control levers are locked in the
NEUTRAL position.
Test 3 — Engine should SHUT OFF if:
• Operator rises off seat with PTO engaged, OR
• Operator rises off seat with parking brake
disengaged.
• Operator moves ground speed control levers out of
their neutral positions before disengaging parking
brake.
Test 4 — Blade Brake Check
Mower blades and the mower drive belt should come to
a complete stop within seven (7) seconds after the
electric PTO switch is turned off (or the operator rises
off seat). If the mower drive belt does not stop within
seven (7) seconds, see your dealer.
NOTE: Once the engine has stopped, PTO switch must
be turned off, parking brake must be engaged, and the
ground speed control levers must be locked in the
NEUTRAL position after the operator returns to the seat
in order to start the engine.
WARNING
If the unit does not pass a safety test, do not
operate it. See your authorized dealer. Under no
circumstance should you attempt to defeat the
purpose of the safety interlock system.
12
1/2008
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