Cub Cadet 20HP Z-Force 44 - Manual (Page 21)

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the wheel. Mount a wheel and tire, replace the
lug nuts, and using a torque wrench, tighten
them to 60
± 10 ft-lbs.
If the leaking tire is on a front caster wheel,
block both traction wheels and raise the caster
wheel so that the tire is an inch off the ground.
Loosen and remove the locknut from the axle
assembly and pull the axle assembly from the
caster yoke. The wheel and two spacer
sleeves will drop free. Slip the axle assembly
through one side of the caster yoke, through a
spacer sleeve, a wheel, the other spacer
sleeve and finally through the other side of the
caster yoke. Then tighten the locknut on the
end of the axle assembly.
Lower the mower off the jack and continue
mowing. The wheel with the leaking tire should
be inflated to 20 psi and the wheel placed in a
large bucket of water. Carefully inspect the tire,
rim and valve for escaping air bubbles which
indicate a leak. Mark each leak with a yellow
marking crayon and then deflate the tire to 8
psi and repeat the inspection. If the leaks you
find are pin hole size to 1/16" diameter, the tire
can be repaired. If the leaks are larger than 1/
16" diameter, the tire can be repaired. If the
tire bead is damaged, the tire can be repaired
or the tire will have to be replaced.
3. Creeping: Creeping is the slight forward or
backward movement of the mower when the
throttle is on and the lapbars are in the
neutral
position. If your mower creeps do the following.
a. Jack up rear of unit.
b. Place Lapbars in the neutral position.
c.
If the tires are rotating, the neutral position
that side transaxle linkage will need to be
adjusted. Contact your service representa-
tive.
F. Brakes
While the mower is in motion, all braking is performed
dynamically through the hydraulic pumps and traction
motors, controlled by the two steering levers. When the
mower is parked with the engine shut off, the hydraulic
system locks the traction wheels.
Note:
To move the mower forward or in
reverse by pushing, you must release the
dynamic braking. Locate the release levers at
the rear of the machine. Pull them toward the
rear and lower the wide area of the rod into the
keyhole slot.
(See photo below)
Hydro Release Valve
.
When the mower is parked with the engine running and
the steering levers in the neutral position, the parking
brakes should be applied. The parking brakes are gear/
pawl brakes mounted internally within each transaxle.
They are both engaged by the same operating lever.
1. Adjustments: The parking brake handle is a
lever in a slot that should engage with moder-
ate force. The parking brakes provide a posi-
tive means to hold a machine stationary that is
similar to “Park” on an automobile.
Note:
The parking brakes normally do not
need to be adjusted.
To adjust either brake individually, loosen the jam
nuts on the cable near the brake arm on the
transaxle. Adjust the nuts so that the brake cable
becomes shorter.
2. Repair: The mower is equipped with internal
gear/pawl brakes and will not normally
require maintenance. If they are not working
properly, please contact your service center.
G. Hydraulic System
1. Hydrostatic Pumps and Motors: The pumps
in the transaxles are the hardest-working com-
ponents in the hydraulic system. They are in
operation all the time the engine is running.
Because of extremely close tolerances, wear is
an important factor in their life.
Note:
The pumps and motors are not owner-
repairable. If a pump fails, contact your Cub
Cadet dealer. Do not disassemble the pump/
motors. For proper maintenance refer to the
Maintenance Schedule, Section E, page 23.
2. Steering Lever Adjustments: Place the
mower on level ground with the engine running,
parking brake off and steering levers in the