Cub Cadet 48-inch Fabricated Deck - Manual (Page 23)

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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 selected for the filter until the oil level is a 1/
4” below the oil tank fill neck. 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 a 1/4” below the oil tank fill neck.
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 ser-
vice technician.
3. Hydrostatic Pumps and Motors: The pumps
are the hardest-working components in the
hydraulic system. They are in operation all the
time the engine is running. Because of
extremely close tolerances, wear is an impor-
tant factor in their life. Contaminants in the
hydraulic oil and cavitation does the greatest
harm to the pumps. Cavitation is a blockage in
the supply lines that produces a partial vac-
uum causing violent bubbling in the hydraulic
oil in the pump.
Check the two suction hoses (the hoses con-
nected to the filter) daily before starting the
engine. Look for a flattened condition or any
leaks and repair or replace as necessary. A
flattened or leakng suction hose will permit
cavitation to develop which can destroy the
pumps in a short time.
Contaminants or foreign matter in the oil will
also damage the pumps . To prevent this, use
a filter that captures particles as small as 25
microns or 25 millionths of a meter in diameter.
You can help in the battle against dirt by being
very careful when you remove or repair a com-
ponent in the hydraulic system. Thoroughly
clean off any component before you work on it.
Plug the ends of any hose or line you remove
with a rubber or plastic plug. Use plastic caps
to seal off the ends of hydraulic fittings. Place
any component you remove in a clean plastic
bag so it can’t pick up dust or dirt. Clean your
hands frequently when working on the hydrau-
lic components.
Note:
The pumps are not owner-repairable.
If a pump fails, contact your Cub Cadet Com-
mercial dealer. Do not disassemble the pump.
4. Steering Lever Adjustments: The steering
lever controls on this Zero Turn Mower (ZTM)
incorporate a patented interlock mechanism
that secures them in their Neutral position
whenever the Park Brake lever is applied.
Additionally, the lap bars can be opened in any
position - Neutral, when traveling Forward,
when traveling in Reverse, or when executing
a zero-turn maneuvar. The lap bars also incor-
porate a Return-To-Neutral (RTN) feature with
hydraulic dampers to provide smooth, non-jer-
key, control motion while affording an auto-
matic hydrostatic braking means.
Whenever the Park Brake lever is moved rear-
ward to the Park Brake engaged position, a
cable mechanism, connected to each drum
brake on the hydrostatic wheel motors, applies
force to each brake lever so that each wheel
brake mechanism can prevent brake drum and
wheel rotation. At the same time, a second
cable and linkage mechanism is activated to
secure both lap bars in their Neutral positions
and to activate the Park Brake switch. Both lap
bars must be in their Neutral positions for the
neutral lock linkage to function - the spring-
loaded linkage will force rods in through align-
Screw
Screw