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Maintenance Instructions LUBRICATION
47
Transmission Reservoir
and Air Bleed Plug Location
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 1 (15W50) Synthet-
ic Oil). When it is necessary to add flu-
id, refer to Specifications for the proper
fluid.
* 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.
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 fill-
ing 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.
Changing Hydrostatic Transmission Fluid
The hydrostatic fluid should be changed every 1000
hours or two (2) years. Also, the fluid should be
changed if the natural color of the fluid has be-
come black or milky (indicating possible over-
heating or water contamination of fluid). The trans-
mission is refilled using the factory service fluid
noted in TRANSMISSION Specifications. The fluid is
changed as follows:
1. Park the mower on a level surface and stop the
engine.
2. Remove the lower drain plug and the air bleed
plug. Allow the fluid to drain out.
IMPORTANT: Clean any dirt from around the
plugs and reservoir cap before removing them.
3. Reinstall the lower drain plug, making sure the
rubber O-ring on the plug is in place and in
good condition.
4. Refill the transmission through the air bleed
plug hole until it is as full as possible.
IMPORTANT: Avoid fluid contamination when fill-
ing the reservoir. Use clean container, spout, fun-
nel, etc. when pouring the fluid into the reservoir.
5. Rotate the transmission input shaft about five (5)
revolutions to allow any trapped air to escape.
6. Before installing the air bleed plug, fill the reser-
voir with fluid allowing a small amount to leak
out of the air bleed plug hole.
7. Install the air bleed plug and fill the reservoir to
the COLD level line.
Cold Level
Reservoir Cap
Hot Level
Air Bleed Plug