Hydrostatic Transmission Fluid; Checking Hydrostatic Transmission Fluid Level - Walker D21d Operator's Manual

Maintenance Instructions

Hydrostatic Transmission Fluid

Checking Hydrostatic Transmission Fluid Level

The hydrostatic transmissions are sealed units
and do not need to be opened to check the fluid
level. Hydrostatic fluid level should be checked ev-
ery 25 hours of machine operation. It is preferable
to check the fluid when the fluid is cold. Check
fluid levels as follows:
Park the mower on a level surface. Stop the
1.
engine and wipe dirt and contaminants from
around the base of the reservoir to better see
the COLD mark.
2. The level of the oil can be seen through the side
of the opaque reservoir (DO NOT REMOVE
RESERVOIR CAP); using a light next to the
reservoir will help make the level more visible.
Cold Level
Transmission Reservoir and
Air Bleed Plug Location
3. The reservoir has a fluid level COLD mark. The
reservoir oil level should ALWAYS be at or
slightly above the COLD mark.
4. If the fluid is below the COLD mark (or the trans­
mission is not performing properly), contact
your local dealer. Attempting to add fluid or
service the transmission may VOID THE
TRANSMISSION WARRANTY.
64
Reservoir Cap
Air Bleed Plug
NOTE: Loosening the air bleed plug on top of the
transmission can be used to verify a low oil condition
in the transmission. As the plug is loosened (DO
NOT completely remove plug), oil will seep out if the
transmission is full of oil. If no oil appears, the trans­
mission oil level is low and the transmission will
need to be serviced by an authorized Walker dealer.
When a transmission is found to be low on oil, it is
highly probable that has been caused by an oil leak
either on the input drive shaft or the control arm
pivot. Dealer service is required to correct any oil
leak along with refilling the transmission oil to the
proper level.
LUBRICATION