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the pump in the Return-To-Neutral position, the
lower rod end should be the same height as the
rigidly fixed ball joint connected on the same end of
the torsion rod. NOTE: This adjustment may not be
necessary if tracking is slightly off. Upper control
rods should be the only adjustment required.
Perform this adjustment on both the right and left
side. Now that the lower end of both torsion rods
are set, proceed to the upper control rods connected
to the control levers.
Loosen the jam nuts on both ends of the upper
control rod. Note: the Speed Sensitivity setting
should be set to the slow position. Rotate control rod
to either lengthen or shorten. So, if the mower is
tracking to the left, either the left side needs to go
faster (by lengthening the upper control rod on the
right) or the right side needs to go slower (by
shortening the upper control rod on the left). If the
mower is tracking to the right, either the right side
needs to go faster (by lengthening the upper control
rod on the left) or the left side needs to go slower
(by shortening the upper control rod on the right).
Tracking in the Fast Hole Setting
It is essential to start with the lower (and shorter)
control rods located near the pumps. With the
control levers in the neutral position, the right and
left lower control rod should be adjusted to allow
their respective torsion bar to remain level at the end
connected to the lower control rod. Specifically, with
the pump in the Return-To-Neutral position, the
lower rod end should be at the same height as the
rigidly fixed ball joint connected on the same end of
the torsion rod. Perform this adjustment on both the
right and left side. Now that the lower end of both
torsion rods are level, proceed to the upper control
rods connected to the control levers.
Loosen the jam nuts on both ends of the upper
control rod. Note: the Speed Sensitivity setting
should be set to the fast position. Before changing
the length of the control rods several facts are
important to know.
In the faster Speed/Sensitivity setting neither control
rod should be shortened so much that at full speed it
pulls the pump control lever (on the sides of the
pumps) against the pump’s internal stop. The
pumps have an internal stop that is not designed to
take this type of force and could eventually cause
pump leakage or other damage to the pump.
Therefore, to reach the maximum capable speed,
the rods should be lengthened one turn at a time
until you can feel in the hand control that the internal
stop has been contacted with the control handles in
the maximum forward position. Then shorten the
cable one turn. This will enable the stationary bar to
stop the control handle and protect the internal
pump stop from damage. Remember, this
procedure does not apply if the Speed/Sensitivity
Adjustment is in the slower setting.
So, if the mower is tracking to the left, either the left
side needs to go faster (by lengthening the upper
control rod on the right) or the right side needs to go
slower (by shortening the upper control rod on the
left). If the mower is tracking to the right, either the
right side needs to go faster (by lengthening the
upper control rod on the left) or the left side needs
to go slower (by shortening the upper control rod on
the right).
The only reference point to limit the adjustment from
becoming extremely off is the relative position of the
pump internal stop and the stationary bar in the
faster Speed/Sensitivity setting. Therefore, if
everything is extremely off either because you are
installing new parts or other reasons you should only
use the faster Speed/ Sensitivity setting to get the
tracking to be accurate. After getting the mower to
track straight, readjust the neutral adjustment, if
necessary. It is normal to need to make these
adjustments from time to time as the linkage breaks
in or wears.
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, inspect
the clutch 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.