Wright Serial # 27543 and Higher - Manual (Page 14)

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.
10
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).
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 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.) 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.
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.
WARNING
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 at the proper level. Higher pressures
will cause the tires to have less traction which will
force you to go slower, with less safety and give
you a harder ride. Higher pressures will help keep
the front 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.
Hydraulic Motor Support Adjustment
The various holes in the mower frame and the
hydraulic motor supports may be used to make a
fine forward/rearward adjustment to the balance of
the all Velke Mowers except the 32” (the 32” only
moved up and down). This adjustment should
always be made in combination with the coarse
height-of-cut adjustment and anti-tip roller
adjustment as described below. When the motor
supports are set in the forward position, the Velke
Mower will be balanced lighter in the front than
when set in the rearward position, giving more
traction to the drive tires. Heavy operators (over
250 pounds) may find that the rearward position
(not available on the 32”) helps keep the front of
the mower down.
Blade Adjustments and 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, the front casters should be
adjusted at the same time. Adjust the rear
wheel motor supports equally in one of the