15.1
Preventive Maintenance
DETROIT DIESEL 53
Clean the breather cap, mounted on the valve rocker
cover, in clean fuel oil every time the engine oil is
changed (refer to Section 4.8).
Item 13
Inspect the blower screen and gasket assembly every
1,000 hours or 30,000 miles and, if necessary, clean the
screen in fuel oil and dry it with compressed air.
Reinstall the screen and gasket assembly with the
screen side of the assembly toward the blower.
Item 14
The electrical starting motor is lubricated at the time
of original assembly. Oil can be added to the oil wicks,
which project through each bushing and contact the
Item 12
armature shaft, by removing the pipe plugs on the
outside of the motor. The wicks should be lubricated
whenever the starting motor is taken off the engine or
disassembled.
The Sprag overrunning clutch drive mechanism should
be lubricated with a few drops of light engine oil
whenever the starting motor is overhauled.
Item 15
Lubricate the battery-charging generator (alternator)
bearings or bushings with 5 or 6 drops of engine oil at
the hinge cap oiler every 200 hours or 6,000 miles.
On early generators equipped with grease cups, turn
the cups down one full turn every 100 hours or 3,000
miles of operation. Keep the grease cups filled with
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cleaned periodically even though a clogged condition
is not apparent. If the engine is equipped with an air
box drain tank, drain the sediment periodically. If the
engine is equipped with an air box drain check valve.
replace the valve every 500 hours or 15,000 miles.
Item 12
Remove the externally mounted crankcase breather
assembly every 1,000 hours or 30,000 miles-and wash
the steel mesh pad in clean fuel oil. This cleaning
period may be reduced or lengthened according to
severity of service (refer to Section 4.8).
Clean the internally mounted breather pads at time of
engine overhaul, or sooner if excessive crankcase
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pressure is observed.
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