Operator Presence And Safety Interlock System - Ransomes Commander 3520 Safety, Operation & Maintenance Manual

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 engaged, the mowing device is off and the operator is in the seat. The system also stops the
engine if the operator leaves the seat with the mowing device engaged or the parking brake disengaged.
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 2,3 or 4;
• The engine continues to run during test 5.
3. Refer to the chart below for each test and follow the check (ü) marks across the chart. Shut engine off
between each test.
Test 1: Represents normal starting procedure. The operator is seated, parking brake is engaged, 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 operator is not seated.
Test 4: The engine must not start if the parking brake is not applied.
Test 5: Start the engine in the normal manner, then turn mower engage device on and lift your weight off

the seat.
Test
1
2
3
4
5

Never operate the equipment with the
operator presence & safety interlock
system disengaged or malfunctioning.
Do not disconnect or bypass any switch.
Operator Seated Parking Brake ON
Yes No Yes
 
 
 


 
Lift your weight off the seat. The machine must stop
WARNING
Mower Switch
No On Off



 

7 OPERATION
Engine Starts
Yes No





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