Tire Maintenance and Pressure

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 life will be the greatest at the highest RPM setting.

How to Test the Operator Presence Control

(OPC) Switch

With the parking brakes applied and the blades ON, 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 a few seconds. If not, service the OPC system or contact your local Wright dealer.

WARNING

Service and Adjustments

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 24 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. Keep the tire pressure in the front caster tires between 30 and 40 psi. Higher pressures will help keep the caster tires on their rims when impacted from the side but give a harder ride. Some 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.

Height-of-Cut

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

•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 on the left hand side of the mower. Once the proper height setting is set on the left, pull back on the deck lift lever on the right hand 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 lever. 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 lower than the rear of the deck) of ¼” is the optimum setting. These two adjustments can easily be made by using the threaded deck hangers

located at each corner of the deck. These hangers are connected to the chains that hold the deck. Simply rotate the hanger at the corner of the deck that needs adjustment. These hangers are right- handed threads. If you raise the rear hangers above the factory setting, the deck may not raise all the way up into 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 by only using these hangers, contact your dealer for assistance.

Belt Tension Adjustment

The pump drive belt is self-adjusting, and requires no adjustment, just replacement. The blade drive belts are self-adjusting also and require no adjustment, just replacement.

How to Move the Mower if the Engine

Won’t Start

Rotate both of the manual “release” valve levers on the rear of each hydraulic pump about ½ turn counterclockwise. It is important not to over tighten these levers. Damage may occur to the pump if this valve is over tightened.

Bleeding Air from the Hydraulic

System

Whenever servicing the hydraulic system, it is of the utmost importance to keep any dirt or debris from getting into the system. Clean off all parts before disassembly and assembly. When any of the hydraulic parts are disconnected or removed or when the oil is changed, air must be bled from the system. If air is entrained in the system, loss of power, excessive heat, and damage to the hydraulic pumps may occur. First, make sure the oil level in the reservoir is correct. The level should be between 3”

–4” below the top of the oil fill tube. Use fully synthetic oil: Mobil 1 15W-