Piper Cherokee Six Service Manual page 610

Same electrical causes
as listed under "Mo-
tor fails to operate."
PIPER CHEROKEE SIX SERVICE MANUAL
TABLE X-III. ELECTRICAL SYSTEM TROUBLESHOOTING (cont.)
Trouble Cause Remedy
Motor fails to operate
(cont)
Shorted, grounded,
or open arm-
ature
Remove and replacewith
an armature known to
be in good condition.
Grounded or open field
circuit.
Test, repair if possible
or replace with a
new part.
Low motor and crank-
ing speed.
Worn, rough, or im-
properly lubricated
motor or starter
gearing.
Disassemble, clean, in-
spect, and relubricate,
replacing
ball bear-
ings if worn.
Same remedies listed
for these troubles.
Excessive arcing of
motor brushes.
Binding, worn, or im-
properly seated brush
or brushes with ex-
cessive side play.
See information
above
dealing with this
trouble.
Dirty commutator, rough,
pitted or scored.
Clean as outlined above.
Excessive wear and
arcing of motor
brushes.
Rough or scored com-
mutator.
Remove and turn com-
mutator down on a
lathe.
Armature assembly
not concentric.
Reface commutator.
ELECTRICAL SYSTEM
Issued: 8/17/72
3D10