Dixon Z-Drive Transaxle Running Adjustment Procedure
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Estimated Time Required: 30 minutes
(1) 9/16" combination wrench
(1) 1/2" combination wrench
(1) 7/16" combination wrench
(1) 3/4" combination wrench
Equalize the air pressure in the rear tires to
Establish "True" Neutral
During bench adjustments, "bench" neutral was established.
The purpose of establishing "true" neutral is to compensate for
the weight of the levers and other parts.
Gently rotate the control levers from the drive
position into the neutral slots. The levers should enter
the slots without having to be pushed forward or pulled backward
to line them up with their neutral slots. If either lever
must be pushed or pulled, the ball joint on that side must be
adjusted. Loosen the jam nut on the ball joint assembly,
and turn the ball joint collar until the lever rotates freely
into their slot. Retighten the jam nut.
Start the mower and move the control levers to
the drive position. See if the mower "creeps" either
forward or backward. If it does, the neutral spring
assemblies must be adjusted to prevent creep. If the left
discup is dragging, adjust the left neutral spring assembly by
turning the top nut clockwise or counter clockwise as needed.
If the right discup is dragging, adjust the right assembly.
If adjustment of the neutral spring assemblies
was necessary, it will be necessary to readjust the levers as
outlined in step 2 above.
Continue this procedure until:
- The levers rotate freely into and out of their neutral slots.
- The mower does not creep in any direction.
Drive the mower. Start slowly and
gradually "stroke" the levers all the way forward while noting
how the mower performs. If the mower is pulling only in
the full forward position, adjust the lever stops located at the
base of the control levers.
If the mower is pulling either to the left or
right through any portion of the lever stroke, follow the
procedures listed below.
- Stop and shut off the mower
- Rotate the levers into drive position.
- Raise the seat to gain access to the transaxle.
- Loosen the 7/16" nuts on the top of each rubber spring
- Turn the 3/4" jam nuts atop the rubber spring assemblies.
If the left side of the
mower is slow, turn the left jam nuts counterclockwise to speed up
the left side.
If the right side is slow, turn the jam nuts clockwise to speed up
that side. Reverse these actions to slow either side down as
- Check neutral, and adjust the top neutral nut, as needed.
- Ensure that the control levers rotate freely in and out of
their slots. Refer to step 2
above if necessary.
- Drive the mower again, and continue these steps until the
mower drives in a
straight line at mowing speed or 1/2 to 3/4 lever stroke.
- Tighten the 7/16" lock nuts on top of each rubber spring
assembly after all
adjustments are completed.
If the mower does not respond to the above
adjustments, the rubber spring mount pre-load is probably too
tight and will need to be readjusted as covered in Bench Adjustment