Wright Serial 54956 and higher - Manual (Page 20)

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5.8 How to Test/Use the Blade Clutch/Brake Switch
Before testing the blade clutch/brake operation, make sure the area is clear and there is nothing
vulnerable to thrown objects from under the mower. No one should be near the mower deck or in its
line of discharge. The discharge chute deflector should be in the down position. Move the engine
throttle to the highest RPM speed setting. (When mowing, the engine speed should always be at its
highest setting. The engine governor will regulate the engine according to the different mowing
conditions at that setting.) Engage the OPC switch and turn on the blade clutch switch. Run blades
for a minute or so. Try engaging and disengaging the blades a few times about 10 seconds apart. If
the blades do not start and stop in a few seconds each time, service the blade brake system or
contact your local Wright dealer. Under mowing load, the clutch’s longevity will be the greatest at the
highest RPM setting.
5.9 How to Test the Operator Presence Control (OPC) Switch
Before beginning this test, secure a large open area that is free of obstacles or hazards.
To test the OPC switch start the engine using the normal starting procedures. While engaging the
OPC lever(s) engage the blades by pulling up on the PTO blade clutch switch. Allow the mower to
start moving forward and then release the mower handles. If the engine doesn’t stop, then service
the OPC system.