Wright Manufacturing 14SH654 How to Test the Operator Presence Control OPC Switch, Height-of-Cut

• Pull the deck lift lever on the right hand side of the mower towards the rear of the mower until it clicks once into the locked transport position. Then set the mower blade height with the selector pin on the left hand side of the mower. Once the proper height setting

of discharge. The discharge chute deflector should be in the down position. The parking brake should now be applied. Move the engine throttle to ¾ 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. Place both feet firmly on the foot platform 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 6-9 seconds each time, service the blade brake system or contact your local Wright dealer. Under mowing load, the clutch’s life will be the greatest if engaged and disengaged at the ¾ throttle level.

How to Test the Operator Presence Control (OPC) Switch

A three second time delay was added to eliminate clutch cycling on bumpy terrain. To test, apply the parking brake and turn ON the blades, try lifting your feet off the foot platform to test the Operator Presence Control switch (OPC). The engine should kill and the blades should stop within 6-9 seconds. If not, service the OPC system or contact your local Wright dealer.

Service and Adjustments

Tire Maintenance and Pressure

Excessively worn tire tread is dangerous on all hills. Replace drive tires with less than 3/32” of any tread groove left. Use tires with the tread pattern recommended by Wright Mfg., Inc. only. Keep the tire pressure in the drive tires between 18 and 22 psi. Higher pressures will cause the tires to have less traction, which will force you to go slower and with less safety and give you a harder ride. Front Casters are equipped with non-pneumatic tires and do not required any air. They do not have any tread but should be replaced when excessively worn. Lowering the tire pressure below the recommended pressure will change the pitch of the deck which may require further deck pitch adjustment.

Height-of-Cut

Before Adjusting the Height-of-Cut be sure the mower blades are not spinning, and both rear tires have proper air pressure. Check for even tire wear. The height-of-cut can be adjusted the following ways:

is set on the left, pull back on the deck lift lever on the right side and then lower the lever towards the front of the machine until it stops at the set height-of-cut.

Deck Adjustments

The mower deck can be adjusted for pitch and side-to- side levels. Pitch is the relationship between the front of the deck and the rear of the deck in regards to height of cut. In most cases, a positive pitch (front of the deck is lower than the rear of the deck) of ¼” is the op timum setting. The adjustments can easily be made by using the deck lift rod assemblies attached to the front and rear deck lift arms and the threaded deck hangers (deck pitch and side-to-side adjustments) located at the front of the deck and at the rear of the deck frame. These hangers are connected to the chains that hold the deck.

First ensure Deck Lift Rod is 29” from center to center of

the ball ends

RearFront

Pitch and side-to-side

If you raise any of these settings above the factory setting, the deck may not raise all the way up into the transport position. Be sure and check the deck height of cut range after any adjustments are made to these hangers to ensure that the height of cut adjustments work properly. If unable to make the adjustments needed to align deck properly, contact your dealer for assistance.

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