Walker MT - Manual (Page 60)

Maintenance Instructions
LUBRICATION
58
Mower Deck Gearbox Lubrication
NOTE: These instructions apply to all mower decks
with gear-driven blades. Refer to DSD52 or DSD62
Mower Deck Lubrication in this section for the
DSD52 or DSD62 deck with belt-driven blades.
The mower deck gearboxes (tee gearbox and blade
drive gearboxes) are connected as a unitized assem-
bly, and oil flows freely between them. The gearboxes
are permanently lubricated (oil filled) and sealed re-
quiring no scheduled lubrication. However, the gear-
box 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 relubricate the gear-
box 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 en-
tering 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.
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
⋅
m).
DSD52 or DSD62 Mower Deck Lubrication
There are several special lubrication requirements
for the DSD52 or DSD62 mower deck in addition to
the requirements detailed in the Chassis and Deck
Lubrication illustration. Lubricate the locations
shown in the Blade Spindle Lubrication and Gear-
box, Dolly Wheel, and U-Joint Lubrication photos
and check and maintain oil in the belt drive gearbox.
1. Lubricate the blade spindles every 25 hours
with two (2) shots of SAE general purpose lithi-
um or molybdenum base grease.
Blade Spindle Lubrication
Blade Drive
Gearboxes
Tee
Gearbox
Blade
Spindles