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Maintenance Instructions LUBRICATION
45
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 Mower Deck Lubrication
There are several special lubrication requirements
for the DSD52 mower deck in addition to the require-
ments detailed in the Chassis and Deck Lubrica-
tion illustration. Lubricate the locations shown in the
Blade Spindle Lubrication and Gearbox, 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
2. Check the oil level in the belt drive gearbox ev-
ery 100 hours (or sooner if a visible oil leak has
developed). With the deck in the normal oper-
ating position, remove the level plug in the side
of the gearcase. Add SAE E.P. (Extreme Pres-
sure) 90W oil to maintain the oil level to the plug.
If the oil level is low, check the gearbox for any
indication of an oil leak. If an oil leak is noted,
the gearbox will need to be removed and rebuilt.
3. Lubricate the dolly wheel pivot every 25 hours
with general purpose grease.
Blade Drive
Gearboxes
Tee
Gearbox
Blade
Spindles