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If frequent additions are required, locate the leak andcorrect.
Inadequate supply of fluid may result in per-
manent internal damage.
If the natural
color
of the transmission
fluid
haschanged
black or milky, overheating and/or water con-
taminate is indicated. The fluid should be drained and
replaced with new transmission
fluid.
To drain the hydrostatic transmission,
remove the hex
plug on the bottom of the hydrostatic transmission.
HYDROSTATIC TRANSMISSION COOLING
The hydrostatic transmission
is cooled by the oil, fan
and fins. If the hydrostatic transmission runs hot, check
to see if the fan is in operating condition,
the oil level
is correct and the fins are clean.
NOTE: DO NOT use high pressure water spray or steam
to clean the hydrostatic
transmission.
PIVOT POINTS
Lubricate all pivot points with light oil at least once a
season.
BALL JOINTS
The ball joints and drag link ends are permanently
lubricated.
HYDROSTATIC FLUID LEVEL
The transmission
has been filled at. the factory and
should
not require
changing
for the
life of the
transmission.
The transmission
fluid level should be checked prior
to initial use. The level should not be above the LOWER
mark which is about 1/4" from the bottom of the expan-
sion tank. See figure 17. Overfilling reduces the expan-
sion area in the expansion tank and fluid will spill at
operating temperatures.
If transmission fluid is needed, use only 1 OW3O engine
oil rated SF or CD.
MAINTENANCE
WARNING: Disconnect
the spark plug wire
and ground against the engine before per-
forming
any
adjustments,
repairs
or
maintenance.
FIGURE 17.
To check or add fluid to the transmission:
1. Unscrew the parking brake knob.
2. Unscrew the two screws holding the access cover
located in front of the seat.
3. Check the fluid level in the expansion tank. See
figure 17.
4. If it is necessary to add fluid, unscrew the cap on
the expansion tank. The cap has left hand threads.
See figure 18. Remove the rubber bladder.
Add
fluid using a funnel. Do not overfill.
5. Reassemble parts.
TROUBLE SHOOTING
Refer to the chart on page 17 for trouble shooting
engine problems.
ENGINE
Refer to the separate
engine
manual for engine
maintenance
instructions.
Service air cleaner every 10 hours under normal con-
ditions. Clean every few hours under extremely dusty
conditions.
To service the air cleaner,
refer to the
separate engine manual packed with your unit.
The spark plug(s) should be cleaned and the gap reset
once a season. Spark plug replacement is recommend-
ed at the start of each mowing season; check engine
manual for correct plug type and gap specifications.
Maintain
engine
oil as instructed
in the separate
engine manual packed with your unit. Read and follow
instructions
carefully.
Model 734G Only: Your engine is provided with a drain
hose for your convenience
in draining
oil from the
crankcase. A clamp secures the drain hose to the side
of the engine. See figure 19. To drain the oil, remove
the hose from the clamp, and remove the drain plug
from the end of the hose. Be certain to replace the drain
plug and to use the clamp to secure hose to the engine
before operating.
FIGURE 18.
12
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