Cub Cadet Z-Wing - Manual (Page 45)

Cub Cadet Commercial Z-Wing
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20.8. The steering pivot shaft.... See Figure 20.8.
20.9. Installation notes:
• Apply lubricant to the friction surfaces of the
steering pivot shaft on assembly: In regions
where the mower will be in continuous duty, a
dry PTFE-based lubricant such as “Tri-flow dry
Teflon Lubricant” is appropriate. This will lubri-
cate the pivot shaft without collecting abrasive
grit. In regions where there is an extended dor-
mant period anti-seize compound will help keep
rust off the bearing surfaces during times of dis-
use.
• Apply a small amount of thread locking com-
pound such as Loctite 242 (blue) to the threads
of the bolt that connects the steering pivot plate
to the steering pivot shaft. Tighten the bolt to a
torque of 35 ft-lbs (47.5 Nm).
• If the locking feature of the nut that secures the
steering link rod has worn, replace the nut, or
apply a small amount of thread locking com-
pound such as Loctite 242 (blue) to the threads
of the bolt that connects the steering pivot plate
to the steering pivot shaft. Tighten the bolt to a
torque of 250 in-lbs (28.25 Nm).
20.10.Test the operation of the mower and its safety
features in a safe area that is clear of hazards,
obstacles, and other personnel before returning
it to service.
Figure 20.8
E-clip flat washer Inner hex flange bushing
Flats for wrench
21. BRAKE LINKAGE ADJUSTMENT
21.1. Description: The brakes are cam-actuated shoe
brakes:
• Because they are cam actuated, if they are mis-
adjusted in either direction, the brakes may drag,
or fail to hold the mower with sufficient force.
• The brakes are generously sized. Because they
are parking brakes, not service brakes, shoe
wear is not likely to be a significant factor unless
the brakes have been dragging.
• There is no internal brake adjustment such as a
star wheel: all adjustment is in the linkage.
• There is a mechanical interlock between the
brake linkage and the steering pivot plate. While
there is interplay between the interlock and
brake actuation, the interlock is covered in the
next section of this manual: BRAKE / PIVOT
PLATE INTERLOCK.
21.2. The basic premise of brake adjustment is that
the brakes should keep the mower from moving
when they are applied, and should not drag
when they are released. This is quite simple.
Brakes that drag can be referred to as too tight.
Brakes that fail to hold the mower with sufficient
force can be referred to as too loose.
21.3. Tight brakes are characterized by:
• The mower cannot be manually pushed (nor the
wheels rotated) with reasonable effort, with the
brake released and the relief valves open.
• The mower has persistent tracking issues, even
after the tracking adjustments have been cor-
rectly performed.
• The wheel motor on one or both sides of the
mower creates an unusual amount of noise and
heat. The noise may be a “chatter”, a “whine” or
a “groan”. The noise will be immediate, though it
may change with use. The temperature will go
up rapidly in the first 15 minutes of use.
• Heat will be generated not only by the friction of
the brake, but also by the increased loads on the
hydro pumps and wheel motors. The tempera-
ture of the fluid in the drive system will climb rap-
idly. High temperatures will significantly shorten
the service life of the pumps and motors. Dam-
age or failure of these components that results
from continued operation with a dragging brake
is not warrantable. It is the customer’s responsi-
bility to recognize when the performance of their
equipment degrades, and ensure that proper
repairs or maintenance are done.