OPERATION 5
en-54
5.2 INTERLOCK SYSTEM ______________________________________________________
The Interlock System prevents the engine to start unless the operator is in the seat, the parking brake is engaged and
the mow switch is in the OFF position. The system stops the engine if the operator leaves the seat with the mow switch
in the ON position or the parking brake disengaged.
Do each of these tests to make sure the Interlock System operates correctly. If any of the tests fail, stop the test and
have the system inspected and repaired as shown below:
• The engine does not start during test 1
• The engine does start during tests 2, 3 and 4
• The engine continues to run during tests 5 or 6
Refer to the chart below for each test and follow the check () marks across the chart. Turn off the engine between
each test.
TEST 1: The test shows the normal engine start procedure. The operator is in the seat, parking brake is engaged and
the mow switch is in the OFF position. The engine will start.
TEST 2: The engine must not start if the mow switch is in the ON position.
TEST 3: The engine must not start if the parking brake switch is in the OFF position.
TEST 4: The engine must not start if the operator is not in the seat.
TEST 5: Start the engine with the normal procedure. Turn on the mow switch and lift your weight off the seat. The
engine must stop. The cutting unit blades must not rotate after seven (7) seconds.
TEST 6: Start the engine with the normal procedure. Disengage the parking brake and lift your weight off the seat. The
engine must stop. The cutting unit blades must not rotate after seven (7) seconds.
WARNING
Do not operate the equipment with the Interlock System disconnected or the system does not operate correctly. Do
not disconnect or prevent the operation of any switch.
Test Operator Seated Mow Switch OFF Parking Brake Switch
ON
Engine Starts
Yes No Yes No Yes No Yes No
1
2
3
4
5
6
Start the engine with the normal procedure, move position of the switch and lift your weight off the seat.
The engine must stop immediately and the cutting unit blades must not rotate after seven (7) seconds.
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