Tires - Cub Cadet 20HP Z-Force 44 Operator's And Service Manual

should rotate. If the blades do not turn, the
blade clutch switch must be replaced, the
seat switch must be replaced or the elec-
tric PTO clutch must be repaired.
The air-gap should be checked every 100
hrs. (or less, if severe operating conditions
exist such as when there are many on/off
cycles, mulching operations, material col-
lection systems used, and dusty/dirty con-
ditions), and the air-gap adjusted if more
than 0.025". To inspect, remove the "nega-
tive" cable from the battery and all spark-
plug wires. The air-gap should be checked
with feeler gages in the three slots of the
BBC (PTO Clutch). The air-gap should be
adjusted to 0.012" to 0.015". There are
three inspection slots in the brake cover. To
adjust, successively tighten each of the
three gap adjustment nuts an equal
amount. Insert a feeler gage (0.012" to
0.015") into each slot as the air gap adjust-
ment nut are tightened. The correct adjust-
ment occurs when slight contact with the
feeler gage occurs. Engage the BBC (PTO
Clutch) a couple of times, and re-check the
air-gap. If it is not between 0.012" and
0.015", repeat the adjustment procedure.
b. Parking Brake/Lap bar Switch: Sit in the
operator's seat. With both steering levers
in the neutral position and the blade clutch
switch "off", release the parking brake and
try to start the engine. The engine should
not start. If it does, the parking brake
switch must be repositioned or perhaps
replaced. If the engine does not start,
engage the parking brake and start the
engine. The steering levers should not be
movable from the neutral position.
c. Seat Switch: With both steering levers in
the neutral position, the parking brake
engaged and the blade clutch switch in the
"off" position, start the engine. Now
release the parking brake, hold down on
the back of the operator's seat against
spring pressure, and swing one of the
steering levers up to the operating position.
Release the operator's seat and the engine
should stop. If the engine does not stop,
the seat switch must be replaced. With
both steering levers folded out in the neu-
tral position, the parking brake engaged
and the blade clutch switch in the "off"
position, sit in the operator's seat and start
the engine. Turn the blade clutch switch to
the "on" position and the blades should
start to rotate. Raise up slightly off the
operator's seat and the blades should stop.
If the blades do not stop when you dis-
mount from the operator's seat, the seat
switch must be replaced.
d. Electric PTO Clutch: This clutch operates
when the engine is running, the operator is
in the operator's seat and the blade clutch
switch is turned on. This electric clutch is a
fairly trouble free device. If a problem
develops and the blades do not turn, first
check the 20 amp fuse in the yellow, 16-
gauge wire between terminal "L" on the
ignition switch and the hour meter and then
investigate the wiring harness and the con-
nections to the seat switch, the blade
clutch switch and the electric blade clutch.
Then check the seat switch, the blade
clutch switch and finally the electric blade
clutch.
e. No Cut in Reverse Switches: When both
speed/direction levers are moved past
"neutral" to reverse, the PTO Clutch will be
deactivated and the mower blades will stop
rotation. The PTO will be reactivated when
one or both of the levers are moved back to
"Neutral".
E.Tires
The two front wheels are caster wheels that are free
to swivel to accommodate the direction of the mower.
The two rear wheels are used to propel the mower in
the direction of input from the drive handles. Inflation
pressure of the rear tires is important for stability
while the mower is in operation. If the tire diameter is
not equal between the two tires, the mower will pull to
one side.
1. Inflation Pressure:
a. Traction Tires—20 psi max; 8-10 psi rec-
ommended
b. Front Caster Wheel—28 psi max; 20-25
psi recommended
c. Cutting Deck Ball Wheels—Solid Polyure-
thane.
Use the Following guidelines for maintaining the tires:
a. Balance inflation pressure between the
rear tires to help maintain straight travel
(see tire side wall for proper inflation pres-
sure).
b. Keep the valve caps tightened to prevent
air pressure loss.
2. Leaking Tires: When a flat tire occurs, repair
or replace immediately. The normal procedure
is to remove the wheel and replace it. If a tire
is getting soft, park the mower on the nearest
level, paved area. If the leaking tire is on a
traction wheel, put blocks on each side of the
opposite traction wheel and jack up the tire
that leaks about an inch off the ground.
Loosen and remove the lug nuts and remove
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