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1.
Inflation Pressure:
a. Traction Tires—20 psi max; 8-10 psi recom-
mended
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 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 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 spare
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 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.
3.
Creeping:
Creeping is the slight forward or back-
ward movement of the mower when the throttle is
on and the lapbars are in the neutral position. If
your mower creeps, refer to Steering Lever
Adjustment Section F4, page 23.
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 stationary with the engine running, the hydraulic
system locks the traction wheels. If the engine is shut off,
the park brake should be engaged.
Note: To move the mower forward or in reverse
by pushing, you must release the dynamic braking.
Locate the valves on the pump. Using a 15mm
wrench, loosen jam nut, then loosen the inner bolt
with an 8mm wrench (1/2 turn). There are two by-
pass valves, one for each pump. After pushing the
mower to the desired location, return both valves to
the operating position by turning the bolt clock
-
wise, but do not overtighten(See photo below)
Jam Nut, 15mm
Inner bolt, 8mm
View looking from Trim Side of Mower
.
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 drum-
type brakes mounted on each traction wheel. They are
both engaged by the same operating lever.
1.
Adjustments:
The parking brake handle is an
over-center lever that should engage with moder
-
ate force.
Note: To increase parking brake capacity,
adjust brake cables at the brake arms equally.
Adjust the cable housing nuts one full turn and
check parking capacity. Repeat if parking brake
does not hold.
2.
Repair:
The mower is equipped with drum
brakes and will not normally require mainte
-
nance. If they are not working properly, please
contact your service center.
G. Hydraulic System
WARNING:
Never overfill the hydraulic units. Damage can
occur if the oil level is not within the proper operat
-
ing range.