24 - 02 - 00
Page - 24 - 04
Reissued: August 1, 1986
1I3
CHART 2401. TROUBLESHOOTING (ALTERNATOR) (cont)
Output indicated on am- High resistance connec- Check visually for loose bind-
meter does not meet mini- tions in field or output cir- ing posts at the various junc
mum values specified in al- cuit. tion points in system, alter
ternator system test pro- nator battery post, lugs on
cedure. (cont) ammeter, connections at volt-
age regulator, circuit breaker,
etc. (See wiring schematic,
chapter 9 l .) Examine
crimped terminal ends for
signs of deterioration at
crimp or strands of broken
wire at crimp. Tighten any
loose binding posts or re-
place bad wire terminals.
Open rectifier. If any of the six rectifiers
open up internally it will re-
sult in a definite limitation
on the current that can be
drawn from the alternator.
After having checked the
previous causes of low out-
put it can be assumed that a
faulty rectifier exists.
See Inspection and Testing
of Components.
Ficld circuit breaker trips. Short circuit in field circuit. Disconnect field wiring at
terminal of altemator. Turn
on master switch. If breaker
continues to trip, proceed to
disconnect each leg of field
circuit, working from the al-
ternator towards the circuit
breaker until breaker can be
reset and will hold. Replace
component or wire which
was isolated as defective. (See
wiring schematic, chapter
9l.)
Trouble Cause Remedy
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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