Wright Serial 54956 and higher - Manual (Page 22)

22
WARNING
5.10 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. 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 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 if
engaged and disengaged at the ¾ throttle level.
5.11 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.
6 Service and Adjustments
6.1 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. 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. They do not have any tread but should
be replaced when excessively worn.
6.2 Height-of-Cut
Before Adjusting the Height-of-Cut be sure of proper air pressure in all four tires and check for even tire
wear. The height-of-cut can be adjusted the following ways:
Coarse Adjustment: For the coarse adjustment the rear wheels, and the front casters should be adjusted
at the same time. Adjust the rear wheel motor supports equally in one of the settings up or down 0.75"
each in a 1.5" total range.
a. Use the highest holes in tractor frame for cutting heights of 1.75" - 3.0".
b. Use the middle holes in tractor frame for cutting heights of 2.5" - 3.75", factory setting.
c. Use the lowest holes in tractor frame for cutting heights of 3.25" - 4.5".
Adjust the front caster arms at their respective support brackets equally in one of the seven settings up or
down 0.25" each through a 1.5" total range.
a. This should be done with two shims (or "C" spacers) on the bottom and one shim on the top of the
caster support arm.