TABLE XI-VI. TROUBLESHOOTING CHART (ELECTRICAL SYSTEM) (cont.)
Trouble
Cause
Remedy
STARTER
Starter fails to operate.
Low battery charge.
Check and recharge if necessary.
Defective or improper
Refer to electrical wiring diagram and
wiring or loose connections.
check all wiring.
Defective starter solenoid
Replace faulty unit.
or control switch.
Binding, worn, or im-
Brushes should be a free fit in the
properly seated brush,
brush boxes without excessive side
or brushes with ex-
play. Binding brushes and brush boxes
cessive side play.
should be wiped clean with a gasoline
(undoped) moistened cloth. A new
brush should be run in until at least
50 percent seated; however, if facilities
are not available for running in brushes,
then the brush should be properly seated
by inserting a strip of number 000
sandpaper between the brush and
commutator, with the sanded side next
to the brush. Pull sandpaper in the
direction of rotation, being careful to
keep it in the same contour as the
commutator.
Binding, worn, or improperiy
—CAUTION—
seated brush, or brushes with
Do not use coarse sandpaper or emery
excessive side play.
cloth. After seating,clean thoroughly
to remove all sand and metal particles
to prevent excessive wear. Keep
motor bearing free from sand or
metal particles.
Dirty commutator.
If commutator is roughor dirty, smooth
and polish with numbe r0000
sandpaper. If too rough and pitted,
remove and turn down.Blow out all
particles.
Shorted, grounded, or
Remove and replace with an armature
open armature.
known to be in good condition.
Grounded or open field
Test, repair if possible or replace with a
circuit.
new part.
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
ELECTRICAL SYSTEM
2E9