Mower Deck Gearbox Lubrication; Tractor Pto Gearbox Lubrication - Walker Model MS (13 HP) Owner's Manual

Maintenance Instructions

Mower Deck Gearbox Lubrication

The mower deck gearboxes (tee gearbox and blade
drive gearboxes) are connected as a unitized
assembly, and oil flows freely between them. The
gearboxes are permanently lubricated (oil filled) and
sealed requiring no scheduled lubrication. However,
the gearbox oil seals should be checked every 25
hours for indication of an oil leak; particularly the
lower seals on the blade drive gearboxes should be
inspected, since they operate in a dirty environment.
If an oil leak is noted, replace the oil seal and relu-
bricate the gearbox assembly as follows:
1. Remove gearbox cover (footrest). Deck orien-
tation should be the normal operating position.
Mower Deck Gearboxes
(shown with gearbox cover removed for clarity)
2. Clean the area around the individual gearbox
cover plates to prevent contaminants from
entering the gearcase.
3. Remove the screws securing the cover plates
on the blade drive gearboxes.
4. Check the level of lubricant in the gearboxes. If
the lubricant is low, add SAE E.P. (Extreme
Pressure) 90W oil until the oil level is up to (sub-
merges) the horizontal shaft in the gearbox
(shaft parallel to cover plate).
NOTE: In case the gearboxes are completely
drained of oil, approximately 5 fl. oz. (15 cl) of oil
per gearbox is required to refill the gear drive
assembly.
46
Blade Drive
Gearboxes
Tee
Gearbox
NOTE: Since the gearboxes are connected as
a unit by connector tubes, it is necessary to add
oil slowly. Allow a few minutes after adding oil
for the oil to flow throughout the assembly and
the oil level to stabilize before reassembly.
IMPORTANT: DO NOT overfill the deck gear-
boxes. The gearbox assembly is not vented,
and overfilling with oil will cause excessive pres-
sure and result in oil leaks.
5. Check condition of the cover gasket and replace
if worn or damaged. Reinstall gearbox cover
plates; torque screws to 24 in-lb (2.7 N

Tractor PTO Gearbox Lubrication

The tractor PTO gearbox is permanently lubricated
(oil filled) and sealed requiring no scheduled lubrica-
tion. However, the gearbox oil seals should be
checked every 25 hours for indication of oil leaks. If
evidence of an oil leak is noted, replace the oil seal
and relubricate the gearbox. The gearbox will need
to be removed from the tractor to be serviced. Refill
with SAE E.P. (extreme pressure) 90W oil until oil
level is up to (submerges) horizontal shaft of gearbox
(shaft parallel to cover). DO NOT overfill.
NOTE: In case the gearboxes are completely
drained of oil, approximately 5 fl. oz. (15 cl) of oil
per gearbox is required to refill the gear drive
assembly.
PTO
Gearbox
Tractor PTO Gearbox
LUBRICATION
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