PREVENTIVE MAINTENANCE SCHEDULE PART 8: MAINTENANCE AND SERVICE
– 168 – Y53-6032 (R05/10)
Oil Changes
CAUTION: When adding oil, types and brands
of oil should not be intermixed because of
possible incompatibility, which could
decrease the effectiveness of the lubrication
or cause component failure.
An initial oil change and flush should be performed after
the transmission has been placed in actual service. This
change should be made any time after 3000 miles (4800
km) but never longer than 5000 miles (8000 km) of over-
the-road service. In off-highway use, the change should
be made after 24 hours but before 100 hours of service
have elapsed.
Refilling
Remove all dirt around filler plug. Refill with new oil of the
grade recommended for the existing season and prevail-
ing service. Fill to the bottom of the level testing plug posi-
tioned on the side of the transmission. Do not overfill the
transmission. Overfilling usually results in oil breakdown
due to excessive heat and aeration from the churning
action of the gears. Early breakdown of the oil will result in
heavy varnish and sludge deposits that plug up oil ports
and build up on the splines and bearings. Overflow of oil
can also escape onto clutch or parking brakes. When add-
ing oil, do not mix different types of oil.
Y53-6032.book Page 168 Monday, May 24, 2010 3:37 PM
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