15.1 Preventive Maintenance
DETROIT DIESEL 53
mounted breather pads at time of engine overhaul, or
Reinstall the screen and gasket assemblies with the
sooner if excessive crankcase pressure is observed.
screen side of the assemblies toward the blower.
Remove the crankcase breather from the engine and
Item 14
wash the steel mesh pad (element) in fuel oil and dry it
with compressed air. Reinstall the breather assembly
The electrical starting motor is lubricated at the time of
(refer to Section 4.8).
original assembly. Oil can be added to the oil wicks,
which project through each bushing and contact the
Clean the breather cap, mounted on the valve rocker
armature shaft, by removing the pipe plugs on the
cover, in clean fuel oil every time the engine oil is
outside of the motor. The wicks should be lubricated
changed.
whenever the starting motor is taken off the engine or
disassembled.
Item 13
The Sprag overrunning clutch drive mechanism should
be lubricated with a few drops of light engine oil
Inspect the blower screen and gasket assemblies every
whenever the starting motor is overhauled.
1.000 hours or 30,000 miles and, if necessary, clean the
screens in fuel oil and dry them with compressed air.
Item 15
Lubricate the 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.
Some generators have a built-in supply of grease, while
others use sealed bearings. In these latter two cases,
additional lubrication is not necessary.
On A.C. generators (alternators), the slip rings and
brushes can be inspected through the end frame
Item 12
Item 13
Item 14
1972 General Motors Corp.
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