Service manual
21
3.
Creeping:
Creeping is the slight forward or
backward movement of the mower when the
throttle is on and the speed control pedal is in
the neutral position. If your mower creeps, refer
to speed control Adjustment Section F4, page
22.
E. Brakes
While the mower is in motion, all braking is performed
dynamically through the hydraulic pumps and traction
motors, controlled by the speed control pedals. If the brake
pedal is pushed, it will return the forward and reverse
pedals to neutral and add the drum brake force to the
hydrostatic brake. 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. The park brake is engaged by pushing the pedal
down and the latch lever until it latches. To release, push it
a second time without pushing the latch lever.
Note: To move the mower forward or in reverse
by pushing, you must release the dynamic brak
-
ing. Locate the valves on the pump. Turn valves
counter-clockwise (using a standard 7/16” wrench)
one quarter turn to push the unit. After pushing
the mower to the desired location, return both
valves to the operating position by turning the
valve clockwise, but do not overtighten(See photo
below)
Left Side Pump
Bypass
Valve
.
When the mower is parked with the engine running and
the speed control pedal 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 pedal should
engage with moderate 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.
Note: The brake can be applied at anytime to
function as a service or an emergency brake.
When it is applied, the forward and reverse pedals
will return to their neutral positions.
F. Hydraulic System
WARNING:
Never overfill the hydraulic units. Damage can
occur if the oil level is not within the proper oper
-
ating range.
Note: When adding hydraulic oil, do so in small
quantities and recheck the oil level before adding
more. It is important that you do not overfill the
reservoir to allow for fluid expansion.
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 fil-
ter element after the first 50 hours of operation
and every 500 hours thereafter.
To drain the hydraulic oil tank, place a 1 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. Remove the three screws from the top
of the oil filter and take out the oil filter element You
don’t have to drain the rest of the hydraulic system. Put
the replacement filter element in the oil filter and
lubricate the sealing surface. Install the three screws in
the top of the oil filter to secure the oil filter element.
(See photo below)
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 15W-
40 oil and 1.5 ounces of Ornite additive selected for the
filter until the oil level is a 1/4” below the oil tank fill
Screw
Screw