GMC C Series 1993, Repair Manual

Page: 246 / 264

SECTION 6D4
37-MT STARTER MOTORS
__________ ________ 37-M T STARTER MOTORS 6P4-1
N O T IC E : W h en fa s te n e rs a re re m o v e d ] a lw a y s re in s ta ll th e m a t th e s a m e lo c a tio n fro m w h ic h th e y w e re
re m o v e d . I f a fa s te n e r n e e d s to b e re p la c e d , u s e th e c o rre c t p a r t n u m b e r fa s te n e r fo r th a t a p p lic a tio n . I f
the, c o rre c t p a r t n u m b e r fa s te n e r is n o t a v a ila b le , a fa s te n e r o f e q u a l s iz e a n d s tre n g th (o r s tro n g e r) m a y
b e \u s e d . F a s te n e rs th a t a re n o t re u s e d , a n d th o s e re q u irin g th re a d lo c k in g c o m p o u n d w ill b e c a lle d o u t.
T h e c o rre c t to rq u e v a lu e m u s t b e u s e d w h e n in s ta llin g fa s te n e rs th a t re q u ire I t I f th e a b o v e c o n d itio n s
a re n o t fo llo w e d , p a rts o r s y s te m d a m a g e c o u ld re s u lt.
CONTENTS
SUBJECT
PACE
Delco Remy 37-MT Starter M otors............
General Description....... ............... ........
Adjustable Drive Housing....
Identification...................................................
Diagnosis of the Starter M otor...............
Starter Motor Tests.................
Thermostat Check (Overcrank Protection)
No Load T est................. ........... ..................
Disassem bly.................... ....................... ...........
Field Fram e............................................ .
Lever Housing.................... ................ ...........
Field C o il..........................
.....
Solenoid Boot................... .......... ...................
Solenoid............................................ ..............
Inspection and Repair.......................................
Lubrication.................... ..................................
Assem bly...................... ......................................
Solenoid.................. ........................................
Solenoid B oot......
......................
Field C o il.... ................................................. ....
Main Assem blies........ .............
....
Pinion Clearance Check.......................... .....
Specifications.................... ................ ........... .
Starter M otor...... ......... ........... ................ ......
Solenoid Sw itch............... ............................
Fastener Tightening .................................. .......
. . 6 D 4 - 1
. . 6 D 4 - 1
. . 6 D 4 - 2
. . 6 D 4 - 3
. . 6 D 4 - 3
. . 6 D 4 - 3
. . 6 D 4 - 4
. . 6 D 4 - 4
. . 6 D 4 - 4
. . 6 D 4 - 4
. . 6 D 4 - 5
. . 6 D 4 - 5
. . 6 D 4 - 5
. . 6 D 4 - 5
. . 6 D 4 - 5
. . 6 D 4 - 9
. . 6 D 4 - 1 1
. . . 6 D 4 - 1 1
. . . 6 D 4 - 1 1
. . 6 D 4 - 1 1
. . . 6 D 4 - 1 1
. . . 6 D 4 - 1 3
. . . 6 D 4 - 1 4
. . 6 D 4 - 1 4
. . . 6 D 4 - 1 4
. . . 6 D 4 - 1 4
DELCO REMY 37-MT STARTER MOTORS
GENERAL DESCRIPTION
The 37-MT 300 and 37-MT 350 heavy-duty starter
motors covered in this section have totally enclosed
shift levers and solenoid plungers to protect theni from
dirjt, icing conditions, and splash (figure 1).
There is a seal between the shaft and lever housing
and a rubber boot or linkage seal over the solenoid
plunger. The seal and boot, when used together, pre­
vent entry of oil into the motor main frame and solenoid
case, allowing the motor to be used on wet clutch appli­
cations.
Other seals are used to resist entry of dirt and mois­
ture into the entire motor assembly. When the oil reser­
voirs and seals are included, the motor is classified as
"long life”, and will provide long periods of attention-free
operation.
Lubrication is provided to each of the three sintered
bronze bushings by oil-saturated wicks that are in con­
tact with the outside of each bushing. Oil soaks into the
sintered bronze material to lubricate the bearing surface
of the'armature shaft. The oil supply is long-lasting;
addition of oil to the wicks between engine overhauls is
not necessary.