Cub Cadet Z-Wing - Manual (Page 47)

Cub Cadet Commercial Z-Wing
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21.9. Park the mower on a flat, firm, level surface, the
engine turned-off, and the hydro relief valves
open.
NOTE: If the mower has been run recently allow
the engine and drive system to cool long enough
to avoid burn injuries before beginning adjust-
ment.
NOTE: Relief valves are located on the back of
each pump, immediately below the pivot brake
shaft.
NOTE: This test can also be performed with the
rear of the mower lifted and safely supported on
jack stands. In this case the wheels would sim-
ply be rotated by hand rather than trying to push
the entire mower.
21.10.Release the parking brake.
21.11. Attempt to push (rotate) the right rear wheel of
the mower in either direction. There will be some
motor drag on the wheel, but it should rotate with
reasonable effort.
21.12.If the wheel will not rotate, or there is doubt as to
whether the brake is fully released or not, loosen
the adjustment nut until the wheel will rotate.
See Figure 21.12.
21.13.If loosening the nut does not allow the wheel to
rotate as it should, check the position of the arm
on the brake cam, as described later in this sec-
tion of the manual.
21.14.Engage the parking brake.
21.15.Attempt to push (rotate) the right rear wheel of
the mower in either direction. It should not turn.
Figure 21.12
Steering lock rod
Brake adjustment nut Output arm
Compression
spring
(brake ON)
21.16.If the wheel does rotate, tighten the adjusting nut
in half-turn increments until the wheel is held
firmly.
21.17.Release the parking brake, and confirm that it
does not drag.
21.18.Repeat and adjust as necessary to assure cor-
rect brake operation.
21.19.Repeat the process on the left rear wheel.
21.20.When making brake adjustments, remember:
• There is about 1.5” (3.8cm) of thread length on
the end of the brake rod.
• The nut is roughly 1/2” (1.27cm) tall, including
the nylon locking ring.
• If 1” (2.54cm) of threaded rod is exposed above
the nut, the nut is bottomed-out, and out of
adjustment range.
21.21.If the nut bottoms-out or tops-out (the nylon lock-
ing ring reaches the end of the threads on the
brake rod) before correct adjustment is
achieved, the brake arm may be mis-indexed.
See Figure 21.21.
NOTE: This is not a likely occurrence unless it
was improperly assembled, or someone unquali-
fied to work on the brakes has tampered with it.
21.22.To reach the brake adjustment arm:
• Loosen the lug nuts using a 3/4” wrench.
• Lift, and safely support the back of the mower,
raising the rear wheels off the ground.
• Remove the rear wheels.
Figure 21.21