Maintenance Instructions
D21d
Lubrication
62
Mower Deck Gearbox Lubrication
NOTE:
These instructions apply to all mower
decks with gear-driven blades. Refer to
DS52
Mower Deck Lubrication on page 62
for the
DS52 deck with belt-driven blades. Refer to
Mow-
er Deck Spindle Lubrication on page 63
for
mower decks with belt-driven blades.
On gear-driven decks, the mower deck gearboxes
(tee gearbox and blade drive gearboxes) are con-
nected as a unitized as sembly, and oil flows freely
between them. The gear boxes are permanently
lubricated (oil filled) and sealed requiring no sched-
uled lubrication. Howev er, 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 en vironment. If an oil leak is
noted, replace the oil seal and relubricate the
gearbox assembly as follows:
1. Remove gearbox cover (footrest). Deck orien-
tation should be the normal operating position.
Tee
Gearbox
Blade Drive
Gearboxes
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) 80W-90 (API GL-5) gear lube until
the oil level is up to (submerges) 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 add-
ing oil for the oil to flow throughout the assem-
bly and the oil level to stabilize before reas-
sembly.
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 re-
place if worn or damaged. Reinstall gearbox
cover plates; torque screws to 24 lb·in. (3
N·m).
DS52 Mower Deck Lubrication
There are several special lubrication requirements
for the DS52 mower deck in addition to the require-
ments detailed in the
Chassis and Deck Lubrica-
tion Points
illustration. Lubricate the locations
shown in the
Gearbox, Dolly Wheel, and U-Joint
Lubrication
photo and check and maintain oil in
the belt drive gearbox.
1. 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) 80W-90 (API GL-5) gear lube to
maintain the oil level to the plug. If the oil level
is low, check the gear box for any indication of
an oil leak. If an oil leak is noted, the gearbox
will need to be removed and rebuilt.
2. Lubricate the dolly wheel pivot
every 25 hours
with general purpose grease.
3.
Lubricate both drive shaft u-joints
every 25
hours
with SAE general purpose lithium or
molybdenum base grease.
