20
c.
Locate jam nuts. (Reference control
assembly in parts list).
d. Loosen jam nuts on both ends of rod con-
nectors. See Control Assembly in the Illus-
trated Parts Book (ONLY if mower creeps.)
e. Start unit and push throttle all the way on.
f.
If unit creeps forward rotate rear rod con-
nectors counter-clockwise. And if unit
creeps in reverse, rotate clockwise.
Adjust the appropriate rod connector. The
left rod for the left side of the mower and
the right rod for the right side of mower.
Afterward, retighten jam nuts.
E. 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 valves on the
pump. Turn valves counter-clockwise one
quarter turn to push the unit. After pushing
the mower to the desired location, return both
valves to the operating position (See photo
below)
.
When the mower is parked with the engine running
and the steering levers opened out 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
overcenter lever that should engage with
moderate force.
Note:
To increase parking brake capacity
tighten the brake rods going back to the brake
arms equally. Tighten rods one full turn and
check parking capacity. Repeat Step.
To adjust either brake individually, tighten the hex nut
in a clockwise direction one full turn looking down the
brake rod. This will tighten the brake about .040 inch.
Normally, both brakes should be adjusted and equal
amount.
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.
F. Hydraulic System
1.
Hoses: Check the hoses from the hydraulic
oil tank to the oil filter to the hydraulic lines
daily for leaks or abrasion and replace any
damaged hoses. Make certain there are no
kinks or twists in any hose.
2.
Hydraulic Oil Tank and Filter:
Note:
Change the hydraulic oil and the oil
filter after the first 500 hours of operation and
every 500 hours thereafter.
To drain the hydraulic oil tank, place a 2 gallon drain
pan under the drain plug on the bottom of the
hydraulic oil tank. Remove the drain plug, drain the
tank, then replace the plug. Place the drain pan under
the filter and remove the filter by unscrewing in a
counterclockwise direction. The filter will be full of oil,
so empty it into the drain pan. You don’t have to drain
the rest of the hydraulic system. Fill the replacement
filter with a good grade of 5W40 Synthetic oil and
lubricate the sealing surface. Screw the filter onto the
filter base until it seats and then another one-half turn
to seal.
Note:
Always wipe off the hydraulic tank fill
cap and the area around it before removing the
cap to prevent dirt from contaminating the oil.
Remove the fill cap and fill the tank with the same
5W40 Synthetic oil selected for the filter until the oil
level is up to the level of the second hole in the fill
tube. Leave this air space for expansion. Start the
engine and let it run at idle for about five minutes.
Check the filter for leaks. Idling the engine and the
pumps in this way will purge any air from the system.
Shut off the engine and recheck the oil level in the
tank. Top-off if necessary until the oil level is up to the
second hole in the fill tube.
Note:
After unit is up to operating tempera-
ture, turn off engine and re-check hydraulic
oil. If oil appears foamy or contains excessive
air bubbles, DO NOT OPERATE UNIT. Contact
service technician.
3.
Hydrostatic Pumps and Motors: The pumps
are the hardest-working components in the
hydraulic system. They are in operation all the
Hydro Release Valve
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