CHRYSLER SERVICE MANUAL
ELECTRICAL SYSTEM—11
check runout with dial indicator. Check both
shaft and commutator. A bent shaft requires
replacement of armature. When commutator
runout exceeds .003 inch, commutator should
be refaced. Remove only sufficient metal to
provide a smooth, even surface. After commu-
tator is refaced, undercut insulation between
bars to depth of %
2
inch with a thin, hacksaw
blade, or Tool C-770. Undercut insulation
square and full width of groove, and polish
commutator with 000 sandpaper to remove
burrs.
10.
TESTING THE FIELD COILS FOR GROUND
Disconnect ground lead from the shunt field
coil at terminal screw. Touch each of brush
holders with a test lamp prod, while holding
the other test prod against starter frame. Two
of brush holders that are 180 degrees apart
should cause test lamp to light, as they are
intentionally grounded. The other two brush
holders should not cause lamp to light when
tested, as they are insulated. If these insulated
brush holders cause lamp to light when tested,
it indicates that the field coil is grounded. Be
sure brush pigtails or leads are not touching
field frame.
If field coils are grounded, inspect terminal
insulation. If insulation is in good condition,
test each coil separately after unsoldering con-
nection wire. Replace grounded field coils. Test
shunt field coil for continuity and for any
ground, then reconnect ground lead.
11.
REPLACING THE FIELD COILS
A pole shoe screwdriver should be used to re-
move and install field coils to prevent damage
to pole shoe screws and for proper tightening.
Pole shoes that are loose may cause armature
core to rub pole shoes. This will decrease starter
efficiency and damage the armature core and
windings.
12.
SERVICING THE BUSHINGS
Inspect armature shaft bearing surfaces and
bearings for wear by placing core in vise
equipped with soft jaws. Do not squeeze tightly.
Try commutator end plate and the drive end
nose casting by placing them on shafts and
checking for side play. Replace commutator end
plate assembly if bearing is worn. Also, replace
drive end bearing if it is worn. The bearing
should be well soaked in SAE 10-W Engine Oil
before it is installed.
13.
SERVICING THE DRIVE UNIT
To Remove drive from armature shaft, tap stop
collar toward pinion and remove lock ring first.
Place drive unit on shaft and, while holding
armature, rotate pinion. The drive pinion
should rotate smoothly in one direction (not
necessarily easily), but should not rotate in op-
posite direction. If drive unit does not function
properly or pinion is worn or burred, replace
drive unit.
14.
ASSEMBLING THE STARTER
(Refer to Fig. 4.) Lubricate armature shaft and
splines with 10-W oil. Assemble drive end parts
on armature using a new lock ring for stop col-
lar. Install dust gravel shield, and slide assembly
into field frame concentrically on nose casting,
and slide assembly into field frame until end of
commutator touches brushes. While holding
armature against brushes with slight pressure,
push brushes up and allow them to come to rest
on commutator, slide armature assembly into
place. Install commutator end plate and through
bolts.
Make sure end nose and plate are posi-
tioned on dowel pins, and tighten through bolts.
Install solenoid plunger clevis pin and cotter
key, but do not bend cotter key over until sole-
noid plunger travel and pinion clearance have
been established. Be sure dust boot lip is over
ring projection on solenoid unit.
Fig.
5—Adjusting Starter Drive Pinion Clearance
MyMopar.com
To Next Page
Loading...
