Preventive Maintenance
DETROIT DIESEL
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
Inspect for evidence of blower seal leakage.
wash the steel mesh pad (element) in fuel oil and dry it
with compressed air. Reinstall the breather assembly.
Item 14 The electrical starting motor is lubricated at the
time of original assembly. Oil can be added to the oil
Clean the breather cap, mounted on the valve rocker
wicks, which project through each bushing and contact
cover, in clean fuel oil every time the engine oil is
the armature shaft, by removing the pipe plugs on the
changed.
outside of the motor. The wicks should be lubricated
whenever the starting motor is taken off the engine or
disassembled.
Item 13
The Sprag overrunning clutch drive mechanism should
Inspect the blower screen and gasket assemblies every
be lubricated with a few drops of light engine oil
1,000 hours or 30,000 miles and, if necessary, clean the
whenever the starting motor is overhauled.
screens in fuel oil and dry them with compressed air.
Item 15 Lubricate the 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 alternators have a built-in supply of grease, while
others use sealed bearings. In these latter two cases,
additional lubrication is not necessary.
The slip rings and brushes of an alternator can be
inspected through the end frame assembly. If the slip
rings are dirty, they should be cleaned with 400 grain or
finer polishing cloth. Never use emery cloth to clean
Item 12
slip rings. Hold the polishing cloth against the slip rings
with the alternator in operation and blow away
Item 14
Item 13
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