Polarizing Generator; Generator Service Test Specifications; Cold Output - Piper PA-24 Comanche Service Manual

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PIPER COMANCHE SERVICE MANUAL
c. Short circ\lits in the &l'DatuN are located by
liS.
of • powler. When the anaature is revolved
in
the
growler, with. stHl
!IItrlP
such . . . hllCk ••w blade b.ld
.bove
it, the blade will vibrate
above the area of the armature core in wbicb the short is located. Copper or brub dut ill the
slots between the cOlllmutator b.rs solHtiIua c. . . . sbarte betwHt2
ben
which CaD
be
eliminated
by cleaninl out the slots. SborQ at
ero.a-oven
of the coils at the core nd
CaD
oftn be ellai·
n.ted by bendilliwitft sliptly md reiAsu1.tiIlc the
e~ed
bare wire.
d. Grounds in
the
armature .e detected by use of a test
1_,
_d tnt poiDa. If
the
l_p
Hehts when
one
tnt point ia placed
OIl
the commutator with the other point on the
core
or shaft,
the anDature is lfOunded. Grounds
OCCUt . .
a result of insulation
taiha",
wbieb i. often broupt
on
by
overloadinl and consequent overheatinl of tbe pnerator. Repairs
cu
aometimn
be
made
if pound.
are
at
con
nda (where coUa cOllIe oat of slots)
by
placiDl iuulaUDcstriDS betw.-n
cote and coil which b.. IlOunded.
9-19.
Poloriain, Gen...ator. Aft.r a pnerator haa been
,.,.ired
and reiaatalled or at any time
after a e.Qerator baa been t.sted. it must
be
repolariDd to lIlake aure that it haa the correct
polarity with r.s9ect to the battery it is
to
charae. Failure to repolarin the pnerator ID.y reault
in
bumed
relay contact points. a run-dOWD battery and pouibly aerious d.lIlace to the tenerator
itself. The procedure to foilow in conectillC paHator polar
ty
depeads
upon the pnerator-recu-
lator wirine circuits; that
is.
whether the lenerator field ia intem.lly pounded or is arounded
throueh the relUlator.
9-20. Generotor Se,vice Telt s,.cificetioftl.
Delc~Remy
specific.tiOGa for 12 volt . .erators
instaned as standard equipment on the PA·24-180
ud
PA·24-2SO
.ircraft are as
foUo.s:
Generator
1101900 1101915
Oelco-Remy, Ref. Service Bulletin
1o.lSO
10.150
Brush Sprine Tension 24 oz. 24 oz.
Field Cllrrent (80·
F)
Amps 1.62 - 1.72 1.62 -
1.n
Volts 12
12
Cold Output
Amps
3S 50
Volts
14.0 14
Approx. R.P.~.
3100 3960
C.ld Output: Cold output data appliea to pneratora at 80 depees F. and with bnlshes w.ll
seated. Variations in temperature and bnash seatinl u well as the condition of the p"8rator may
cause deviations
of
100 R.P.M. or more from rated speed.
Hot Output: Hot output is maximum output
u
controlled by current regulator.
ELECTRICAL SYSTEM
ISSUED: 8/18/72
3 A20