SAFETY, OPERATORS & MAINTENANCE MANUAL
en-35
7OPERATION
7.2 OPERATOR PRESENCE AND SAFETY INTERLOCK SYSTEM
1. The operator presence & safety interlock system prevents the engine from starting unless the parking
brake is on, and the mowing device is switched off. The system stops the engine if the operator leaves the
seat with the parking brake disengaged. If the operator leaves the seat with the mowing device engaged
and the parking brake on the mowing device will stop.
2. Perform each of the following tests to ensure the operator presence & safety interlock system is
functioning properly. Stop the test and have the system inspected and repaired if any of the tests fail as
listed below:
• The engine does not start in test 1;
• The engine does start during tests 2 or 3.
• The engine continues to run during test 4.
3. Refer to the chart below for each test and follow the check (9 ) marks across the chart. Shut engine off
between each test.
Test 1: Represents normal starting procedure. The operator is seated, parking brake is on, the operators
feet are off the pedals and the mower engagement device is off. The engine should start.
Test 2: The engine must not start if the mower engage device is on.
Test 3: The engine must not start if the parking brake is off.
Test 4: Start the engine in the normal manner, then turn mower engage device on and lift your weight off
the seat. -
Never operate the equipment with the
operator presence & safety interlock
system disengaged or malfunctioning.
Do not disconnect or bypass any switch.
Test Operator Seated Parking Brake
Switch
Mower Switch Engine Starts
Yes No On Off On Off Yes No
1
99 99
2
999 9
3
9 999
4
9
z
99
z
z
Lift your weight off the seat. The cutting units must stop rotating within seven (7) seconds
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