Piper PA-28RT-201T - Page 191

24-02-00
Page 24-04
Revised: August 17, 1982
1H23
CHART 2401. TROUBLESHOOTING (ALTERNATOR) (cont)
Output indicated on am- High resistance connections Check visually for loose bind-
meter does not meet min- in field or output circuit. ing posts at the various junc-
imum values specified in al- 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 91.) 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
pressed into the rear bell
housing of the alternator
open up internally, it will
result in a definite limitation
on the current that can be
drawn from the alternator.
After having checked the
previous causes of low output
it can be assumed that a faulty
rectifier exists.
See Paragraph’s titled Test-
ing of Rectifiers or Inspec-
tion and Testing of Com-
ponents .
Field circuit breaker trips. Short circuit in field circuit. Disconnect field wiring at
terminal of alternator. 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
91 .)
Trouble Cause Remedy
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL