Service manual

20
b. Parking Brake Switch: Sit in the operator’s
seat. With the speed control pedals 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.
c. Seat Switch: With the speed control pedals
in the neutral position, the parking brake
engaged and the blade clutch switch in the
“off” position, start the engine. Now, while
sitting in the seat, release the parking brake,
then, raise up slightly off the operator’s seat
and the engine should stop. If the engine
does not stop, the seat switch must be
replaced. With the speed control pedals in
the neutral 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 opera
-
tor’s seat and the blades should stop. If the
blades do not stop when you dismount 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 devel
-
ops and the blades do not turn, first check
the 20 amp fuse in the yellow, 16-gauge wire
between terminal “L” (for the Gasoline
Engine) on the ignition switch and the hour
meter and then investigate the wiring har
-
ness and the connections to the seat switch,
the blade clutch switch and the electric blade
clutch. Then check out the seat switch, the
blade clutch switch and finally the electric
blade clutch.
D.Tires
The two front wheels are steerable wheels that are
synchronized to turn in coordination with the speed and
direction of the rear wheel motors.
The two rear wheels are used to propel the Mower in
the direction of input from the speed control pedals.
Inflation pressure of the front and rear tires is important
for traction and stability while the Mower is in operation.
If the tire diameters are not equal between the tires, the
Mower will pull to one side.
1. Inflation Pressure:
a. Traction Tires—20 psi max; 10-12 psi rec-
ommended
b. Front Wheel—25 psi max; 20-25 psi recom-
mended
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 pressure).
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 with a spare.
Take the leaking tire to a maintenance area and
repair. 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
the wheel. Mount a spare 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 wheel, set park
brake, block both traction wheels and raise the
front 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 yoke. The wheel and two spacer
sleeves will drop free. Slip the axle assembly
through one side of the yoke, through a spacer
sleeve, a spare wheel, the other spacer sleeve
and finally through the other side of the 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 taken to the maintenance area, the tire
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 using an aerosol can of tire inflater
and latex sealer available from any auto supply
store. Follow the directions on the can. If the
leaks are larger than 1/16" diameter, the tire
can be repaired with rubber plugs also
available in a kit from any auto supply store. If
the tire bead is damaged, a tube will have to be
installed in the tire or the tire will have to be
replaced.