Starting
System
’
STARTER
A
solenoid-shift starter is shown in Figure
30.
After
the starter button is pushed, battery current ener-
gizes the start solenoid. The solenoid causes an arm
to push the starter pinion into the flywheel ring gear.
Simultaneously, the start solenoid contacts close and
allow the starter motor to start turning. The starter
remainsengaged until thestart button is released. An
overrunning clutch protects the starter from damage
before it can be disengaged from the flywheel.
Beginning with Spec
H,
the starter motor on MCCK
engines
is
the gear drive starter shown in Figure 30a.
STARTING MOTOR
’
.
FIGURE 30a. GEAR-DRIVE STARTER
START
BUTTON
Maintenance
For proper cranking-motor operation with a min-
imum of trouble, a periodic maintenance procedure
should be followed. Periodic lubrication, inspection
of the brushes, and commutator as described in this
section will insure long cranking motor life. Periodic
disassembly (see
Disassembly)
of
the cranking motor
for a thorough overhaul is recommended as a safe-
guard against accumulations of dust, grease, and
parts wear.
Lubricate all oil-type bearings with
8
to
10
drops
of
light engine oil
(SAE
20).
All
oil-less type bearings
and bushings should be given afewdrops of light oil.
Lubricate the cranking motor drives with afew drops
of light engine oil.
-
CLUTCH
SHIFT
ARM
SOLENOID
Never
oil
the commutator. Oil
on
the commutator reduces the
FIGURE 30.
SOLENOID-SHIFT
STARTER cranking ability
of
the motor.
The commutator can be cleaned by using number
00
The gear drive is mounted on a shaft which extends
from the starter motor. When not running, the drive
pinion gear is retracted soit clears the flywheel ring
gear. When starting, a spiral spring through in-
creasing speed forces the drive pinion to engage the
flywheel ring gear. The pinion and flywheel ring gear
teeth have beveled ends that ensure their engaging
properly.
*
b
Starter motors are not designed
for
continuous operation.
Do
not oper-
ate more than
30
secondsper
ON
cycle.
Do
not oper-
ate starter more fhan
70
seconds in a stall condition
if
engine will not rotate. Serious damage could result
if
these time limits are exceeded.
sandpaper. Never use emery cloth. If the commutator
is out
of
round or has high mica, remove
it
from the
cranking motor. Turn the commutator down on
a
lathe being careful to remove onlyenough material to
true up the commutator and remove high mica.
It
is not necessaryto undercut micaon
startermotorcommutators.
Replace worn brushes. If brushes wear rapidly, check
for excessive brush spring tension and roughness or
high mica on the commutator.
Solenoid
Shift
Periodically inspect solenoid and shift lever to make
sure they are operating properly. Keep the solenoid
shift lever free of dirt and excess grease.
41
Redistribution or publication of this document
by any means, is strictly prohibited.
Redistribution or publication of this document
by any means, is strictly prohibited.
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