Hydrostatic Transmission Cooling Fins; Checking/Servicing; Security Of Air Filtration Components - Walker T25i Operator's Manual

Maintenance Instructions

Hydrostatic Transmission Cooling Fins

Keeping the cooling fins on the hydrostatic trans-
missions clean and free of obstruction is essential
to avoid overheating the transmission fluid and
shortening transmission life. The cooling fins should
be checked every 100 hours; and cleaned if nec-
essary.
To clean the fins, use compressed air and/or a
pressure washer. The cooling fins extend all the
way around the housing -- the fins underneath need
to be clean as well as the more visible fins above.
Also, pay close attention to the area under the drive
pul ley.
IMPORTANT: In case an oil leak develops on the
input shaft, the cooling fan blowing dusty air and oil
on the transmission will quickly pack the cooling
fins with oily dirt. If this condition occurs, replace
the seal immediately to avoid overheating and dam-
aging the transmission. The input shaft assembly
and seal are easily replaced without removing the
transmission from the machine.
An additional procedure in maintaining transmission
cooling is to inspect the cooling fans. Replace the
fan(s) if blades are missing or damaged.
Cooling Fan
Hydrostatic Transmission Cooling Fins
66

CHECKING/SERVICING

Security of Air Filtration Components

NOTE: The following inspection is only an exter nal
inspection and should be done without "dis-
turbing" the filtration components.
On a daily basis, visually inspect the external condi-
tion of the complete air cleaner system. The follow-
ing items should be inspected:
1.
2.
3.
Cooling Fins
CHECKING/SERVICING
DANGER
To prevent accidental starting of the en-
gine when servicing or adjusting the ma-
chine, remove the key from the ignition
switch and disconnect the spark plug
wires.
Check the Donaldson Radialseal™ air cleaner
canister for damage. Make sure the cover is in
place and the cover latches are secure - do not
run the engine without the air cleaner cover in
place and secure.
Inspect both air intake hoses for cracks, nicks,
cuts, etc., and check the hose clamps for tight-
ness.
Check to make sure the air filter restriction
gauge is in place and hose connections are se-
cure.
CLEANING/