Opc System - Jacobsen Standing Zero Turn Rotary Mower ZT90023 Safety, Operation & Maintenance Manual

7.2

OPC SYSTEM _____________________________________________________________

The OPC System prevents the engine to start unless the steering control levers are in the Neutral position, the parking
brake is engaged and the PTO switch is in the OFF (Down) position. The system prevents cutting unit operation with
the PTO switch in the ON position and the steering control levers in the NEUTRAL position.
Do not operate the equipment with the OPC System disconnected or the system does not operate correctly. Do not
disconnect or prevent the operation of any switch.
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 operates during tests 5
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 on the platform, parking brake is engaged,
the steering control levers are in the NEUTRAL position and the PTO switch is in the OFF (down) position. The engine
will start.
TEST 2: The engine must not start if the PTO switch is in the ON position.
TEST 3: The engine must not start if the parking brake is disengaged.
TEST 4: The engine must not start if the steering control lever(s) is out of the NEUTRAL position.
TEST 5: Start the engine with the normal procedure. Make sure the steering control levers are in the Neutral position.
Turn on the PTO switch. The cutting unit blades must not rotate.
Test
1
2
3
4
5
PTO Switch OFF Parking Brake
Yes No Yes




 
!
WARNING
Steering Control
Engaged Levers in Neutral
No Yes
 
 
 

 
OPERATION 7
Engine Starts
No Yes No



 

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