Wright Serial #49705 and Higher - Manual (Page 14)

13
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 3-5 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 3-5
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 of
proper air pressure in rear drive tires and check for
even tire wear. Your mower is set from the factory
at 3.00”. The height-of-cut can be adjusted the
following ways:
Factory Setting – 3.00+” with ¼” forward pitch.
1. Coarse Adjustment: For the coarse
adjustment (1 inch increments) the rear
motor supports and front caster arms
need to be adjusted up or down equally
to achieve a 1.5”-5” deck height.
2. Fine Adjustments: For fine adjustments
(1/16”-1/4”) adjust either the ¼” blade
spacers, ¼” caster “C” spacers or 1/16”
caster washer.
3. Temporary Height-of-Cut Adjustment:
using the caster shims ("C" spacers) you
can adjust the blades downward
Bottom wheel and caster arm position (3.5"-5")*
Middle wheel and caster arm position (2.5"-4")*
Top wheel and caster arm position (1.5"-3")*
*Blade spacers can be added or removed for
additional adjustment in ¼” increments. Use three
blade spacers for optimum cut.
*For optimal deck pitch use one caster spacer.
Always keep the 1/16” washers above the “C”
spacers to prevent the spacers from sliding off of the
caster pin.
The angle of attack of the blades should always be
lower at the front. This makes the blade cut the grass
only once and saves fuel and wear on the whole
mower. It also allows more efficient mowing and
grass catching or dispersal. If you mow in an area of
the country where the lawn is very thick and spongy
you may have to set these two adjustments as they
would appear on the grass and not on a hard surface
due to the tires “floating” up on or “sinking” down into
the lawn.