Wright Manufacturing Stander ZK Series Instruction Manual Download Page 24

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WARNING

5.9 How to Perform the Tracking Adjustments

First ensure that the tire pressure is equal on both rear drive tires.  Drive the mower on a level parking lot
with engine at full throttle.  Check that the mower drives in a straight line when both hand controls are held
to the full speed position which is up against the stationary control bar.  If not, park the mower and

stop the

engine

. Before proceeding to adjusting the mower tracking, check and make sure both controls move

freely through the forward and reverse range. Make sure that debris has not hindered the movement of the
control rods and linkages. If all control linkages move freely and mower tracking is off, proceed to the next
step.

The adjustment is made by loosening the jam-nuts on the control rods (this may need to be done to one or
both control rods) and adjusting the control rods.  Once the jam-nuts are loosened at the top and bottom of
the control rod proceed to turning the control rod clockwise or counter-clockwise.  Shortening the control
rod will increase the speed of the forward movement of the mower on that side.  Lengthening the control
rod will slow the forward movement of the mower on that side.

In the

“faster” Speed/Sensitivity setting

(this is the factory setting) neither rod should be lengthened so

much that at full speed it pulls the

pump control lever (on the sides of the pumps) against the internal pump

stop. 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 pump stop has been contacted. Then shorten the
rod one turn (damage to the hydro pump will occur if the controls are adjusted in a way that put direct
pressure on the internal pump stop). You will feel the slight resistance. There is no need to start the engine
while checking this incrementally. Remember, this procedure

does not apply

if the Speed/ Sensitivity

Adjustment is in the slower setting.

If the rod is made shorter it will increase the forward speed capability for that side of the mower and if the
rod is made longer it will slow down that side of the mower. So, if the mower is tracking to the left, either
the left side needs to go faster (by shortening the left-side rod) or the right side needs to go slower (by
lengthening the right-side rod). If the mower is tracking to the right, either the right side needs to go faster
(by shortening the right-side rod) or the left side needs to go slower (by lengthening the left-side rod). It is
important that neither rod should be shortened too far, as mentioned above.

The only reference point to limit the adjustment from becoming extremely off is the relative position of the
pump stop and the handlebar in the

faster Speed/Sensitivity setting

. Therefore, if everything is way off

either because you are installing new parts (or other reasons) you should only use the

faster Speed/

Sensitivity setting

to get the tracking accurate and then change to the slower speed range and adjust the

tracking only one or two turns on either side.

After getting the mower to track straight, check and/or readjust the neutral adjustment on the pump by
using a ¼” Allen wrench at the Return-to-Neutral (RTN) mechanism, if necessary. It is normal to make
these adjustments from time to time.

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 within 6-9 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.