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WALKER MANUFACTURING COMPANY
July 2006
SERVICE INSTRUCTIONS
Model MW
9. Fill the crankcase with new, clean oil. Use only
crankcase lubricants recommended by the engine
manufacturer. Refer to
Specifications in this man-
ual or the engine owner’s manual. Use the recom-
mended oil viscosity for the expected ambient
temperature. Oil with the correct viscosity will aid
starting in cold weather and assure proper lubrica-
tion in hot weather. Fill up to, but not above, the
upper mark on the dipstick. Crankcase capacity is
1.6 quarts (1.5 liters) plus 0.2 quart (0.2 liters) for
the new oil filter.
Model MB
9. Fill the crankcase with new, clean oil. Use only
crankcase lubricants recommended by the engine
manufacturer. Refer to Specifications in this manu-
al or the engine owner’s manual. Use the recom-
mended oil viscosity for the expected ambient
temperature. Oil with the correct viscosity will aid
starting in cold weather and assure proper lubrica-
tion in hot weather. Fill to FULL mark on the dip-
stick; crankcase capacity is 1.5 quarts (1.4 liters)
when changing oil and filter.
All Models
IMPORTANT: Check the dipstick reading before
adding the last 1/2 pint of oil and fill only to the “F”
mark. DO NOT overfill the crankcase (oil above
“F” mark) as this CAN result in engine overheat-
ing, loss of power, and possible engine damage.
10. Start the engine and check for oil leaks around the
oil filter. Stop the engine, recheck the oil level, and
add oil if necessary. (When the engine is first op-
erated with a new oil filter, the oil level drops slightly
as the filter is filled with oil.)
Mower Deck Gearbox Lubrication - All Models
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.
All Gear Drive Models
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 orienta-
tion should be the normal operating position.
Mower Deck Gearboxes
(shown with gearbox cover removed for clarity)
2. Clean the area around the individual gearbox cov-
er 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)
80W-90 gear lube until the level is up to (submerg-
es) the horizontal shaft in the gearbox (shaft paral-
lel to cover plate).
Blade Drive
Gearboxes
Tee
Gearbox
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