Walker MC (20 HP) - Manual (Page 50)

Maintenance Instructions
LUBRICATION
46
Gearbox, Dolly Wheel, and U-Joint Lubrication
Tractor PTO Gearbox Lubrication
Checking Gearbox Oil Level
Check the gearbox oil level every 25 hours, and if
necessary, add oil [SAE E.P. (Extreme Pressure)
80W-90 gear lube] to maintain oil level to the FULL
mark on the dipstick.
IMPORTANT: DO NOT overfill the PTO gearbox to
avoid oil leakage out of the dipstick standpipe.
If the oil level is low, check the gearbox for any indi-
cation of an oil leak. If an oil leak is noted, the gear-
box will need to be removed and rebuilt.
Dipstick Location, Tractor PTO Gearbox
Changing Gearbox Oil
The tractor PTO gearbox is oil filled. No scheduled
oil change is required. However, changing the oil af-
ter the first 100 hour break-in period will extend
gearbox life and is recommended.
1. Remove the drain plug in the bottom of the
gearcase, drain the oil, and reinstall the plug.
2. Refill the gearbox through the dipstick stand-
pipe using 7 to 8 fl. oz. (21 to 24 cl) of SAE E.P.
(Extreme Pressure) 80W-90 gear lube. Re-
move plug in top of gearcase to vent air when
refilling.
3. Check that the oil level is at the FULL mark on
the dipstick. DO NOT overfill.
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 ac-
celerate wear and eventually cause loss of pow-
er to the drive wheels.
NOTE: Check oil level of sealed hydrostatic
transmission after first 500 hours using a light
next to the reservoir.
Dolly Wheel
Pivot
U-Joint
Belt Drive
Gearbox
Dipstick
PTO
Gearbox
Jackshaft