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10-54
CRANKING SYSTEM
ELECTRICAL SYSTEMS
(330
)
DRIVE
HOUSING
-'
~
FIELD FRAME
ASSEMBLY
'=
0
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ARMATURE
BRAKE WASHER
f
~
SERIES 70
ONLY
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.
i
CENTER
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a
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BEARING PLATE
1
_
..
SERIES
70 ONLY
'=
I)
'"'DR IVE ASSEMBLy-f
WASHER-
SERIES
40-50
ONLY
========
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F == = = = =
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f
;
-
WASHER-SERIES 70
BRAKE WASHER
SERIES
40-50
Figure
10-64-Cranking Motor Disassembled
sembly must not be cleaned by any degreasing
or high temperature method. This might dam-
age insulation so that a short or ground would
subsequently develop, and will remove lubri-
cant originally packed in the overrunning clutch
so that clutch would soon be ruined.
8. Carefully inspect all parts for wear or
damage and make necessary repairs or replace
unserviceable
parts.
If
brush springs are dis-
torted or show evid
ence
of
overheating,
replace
them.
Any soldering must be done with rosin
flux
;
n
ev er
u
se
acid flux on
electrical
connec-
tions.
9. Test armature and make necessary re-
pairs or turn commutator if required, following
the same
procedure
as specified for generator
armature in paragraph. 10-28.
b. Assembly of Cranking Motor
Ass
emble
cranking motor
by
reversing
dis-
assembly
procedure.
If
field coils were
removed,
use pole shoe spreader (KMO 579) and pole
shoe screwdriver to install them, to avoid dis-
torting field frame and to insure proper tight-
ening of pole shoe screws. See figure 10-65.
Before installation of solenoid switch check
the shift lever spring for proper tension. A
weak spring may cause sluggish disengagement
of drive clutch pinion in cold weather, par-
ticularly if the shaft
is
gummed up. With spring
scale connected to hole in upper end of shift
lever, the pull at start of travel should be 9 to
12 pounds and at end of
travel should
be 28 to
35
pounds.
When solenoid switch plunger is connected to
Figure 10-65-Using Pole Shoe Spreader and Screwdriver
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