Gear Axle Lubrication; Hydrostatic Transmission Fluid; Checking Hydrostatic Transmission Fluid Level - Walker Model MS (13 HP) Owner's Manual

Maintenance Instructions

Gear Axle Lubrication

•
The gear axle oil lubrication is SAE 80W-90 (API
GL-5) gear lube.
•
Check the axle oil level after every 100 hours of
operation by removing the oil level plug. If additional
oil is needed, remove the breather vent on top of ax-
le and fill until oil is at the level plug.
•
Change axle oil every 1000 hours or two (2)
years.

Hydrostatic Transmission Fluid

Checking Hydrostatic Transmission Fluid Level

Hydrostatic transmission fluid level should be
checked every 25 hours of machine operation. It is
preferable to check the fluid level when fluid is
cold. Check fluid level as follows:
1. Park the mower on a level surface. Stop the
engine and wipe dirt and contaminants from
around the reservoir cap and air bleed plug.
IMPORTANT: Before removing the reservoir
cap, clean any dirt from around it. Any dirt or
contaminants entering the transmission will
accelerate wear and eventually cause loss of
power to the drive wheels.
2. Remove the reservoir cap and check the level of
the fluid. The reservoir has a fluid level COLD
mark and HOT mark. The reservoir oil level
should ALWAYS be at or above the COLD
mark and NEVER above the HOT mark.
3. If the fluid is below the COLD mark (or the trans-
mission is not performing properly), loosen the
air bleed plug (located on the top of transmis-
sion case next to the plastic reservoir).
a. If a small amount of fluid leaks from around
the air bleed plug:
* The transmission is full of fluid.
* Tighten the plug and fill the reservoir to
the COLD level mark.
b. If no fluid leaks from around the air bleed
plug:
* Slowly add fluid into the reservoir until
fluid starts to leak from around the plug.
(Transmissions are serviced from the
factory with Mobil DTE 18M hydraulic
oil. When it is necessary to add fluid,
refer to Specifications for the proper flu-
id. Use any of the fluids listed.)
* As soon as there is fluid leaking from
around the air bleed plug, tighten the
plug and fill the reservoir to the COLD
level mark. Wipe any excess oil off of
the transmission housing.
Reservoir Cap
Air Bleed
Plug
Transmission Reservoir
and Air Bleed Plug Location
IMPORTANT: DO NOT overfill the transmission
reservoir. This will result in oil leaking out of the res-
ervoir cap vent when the transmission warms up. It
is preferable to add fluid to the transmission when it
is cold and make sure the oil is not above or be-
low the COLD level mark.
IMPORTANT: The transmission reservoir has a fine
mesh screen in the bottom to trap dirt and foreign
particles from entering the transmission. When filling
the reservoir, fluid will flow quite slowly through this
screen; so it is essential that there is fluid at the bleed
plug before the transmission is considered full.
IMPORTANT: Any attempt to remove or in any way
alter the filtering screen in the transmission reservoir
could cause damage to the transmission and will
VOID any transmission warranty.
LUBRICATION
Hot Level
Cold Level
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