Wright Velke HYDRO PISTOL GRIP, Instruction Manual

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WARNING
WARNING
5.7 How to Perform the Neutral and Tracking Adjustment
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Find a secure location away from bystanders to perform the drive adjustments (preferably face the
mower towards a wall).
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Raise the drive wheels off the ground and stabilize the mower.
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Start the engine as described in the “Mower Operation” section and let it warm up for a few minutes.
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Have a helper hold the OPC down so that both your hands are free to make the adjustments.
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Release the parking brake and set the speed control lever to a forward speed greater than 2. This
ensures that the pump control bearing is not contacting the speed adjustment cam.
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The control levers should remain locked in the neutral position via the thumb locks.
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Observe the drive wheels.
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If either wheel rotates, loosen the upper and lower steering control rod jam nuts for that side and adjust
the rod longer or shorter until the wheel stops. Find the midpoint adjustment in the range that the wheel
remains stopped. Retighten the rod jam nuts.
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Now set the speed control lever to neutral (first pulled back position).
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Release the control levers via the thumb locks.
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If the right wheel rotates, loosen the upper and lower speed control rod jam nuts and adjust the rod in
or out until the right wheel stops. Find the midpoint of the range that the speed control rod can be
adjusted as the right wheel remains stopped. Tighten the jam nuts.
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Now if the left wheel rotates, adjust the tracking control knob in or out until the left wheel stops. The
tracking control knob is located on the left pump control plate.
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The wheels should now go to a neutral position if the steering control levers are locked using the thumb
locks and/or the speed control lever is in neutral.
5.8 Straight Line Tracking Adjustments
Verify that both rear tires are inflated to the proper PSI.
Find a wide open flat area away from bystanders and objects.
Drive the mower with the speed control set to the most used position.
If the mower pulls to one side, return the speed control lever to neutral and shut off the engine.
If the mower pulled to the left, turn the tracking adjustment knob counterclockwise (left) ½ turn.
Repeat driving the mower and making incremental adjustments after shutting the engine off until the
mower tracks straight.
Conversely, if the mower pulls right, turn the tracking adjustment knob clockwise (right).
5.9 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.
5.10 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, release the parking brake
and place the speed control in the slowest speed setting. 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.