Piper Cherokee Six - Electrical System Troubleshootin

PIPER
CHEROKEE
SIX
SERVICE
MANUAL
TABLE
X-II.
ELECTRICAL
SYSTEM
TROUBLESHOOTING
(cont.)
Isolation
Procedure
and
Remedy
Trouble
Probable
Cause
Field
Circuit
Breaker
trips.
(cont)
Short
circuit
in field
circuit.
(cont)
and
will
hold.
Replace
component
or wire
which
was isolated
as
defective.
(See
Figure
10-1)
Short
circuit
in field
winding
of
alternator.
Disconnect
field
wiring
at terminal
of alter-
nator.
Turn
on
master
switch.
Reset
breaker
and if breaker
fails
to
retrip,
this
isolates
short
circuit
to
field
of
alternator
itself.
Check
brush
holders
for
shorting
against
frame.
If
there
are
no
obvious
signs
of
a physical
short
circuit
at field
terminal
or
brush
holder
replace
alter-
nator.
(Note:
Intermit-
tent
short
circuit.)
Internal
short
circuiting
of
the
field
can
occur
at various
positions
of
the
rotor,
therefore,
reconnect
field,
reset
breaker,
pull
propeller
slowly
by
hand
turning
alternator
rotor
through
360
°
of
travel.
Observe
circuit
breaker
for
signs
of
tripping.
ELECTRICAL
SYSTEM
Issued:
8/17/72
3D5