Piper Comanche PA-24 Service Manual page 676

PIPER COMANCHE SERVICE MANUAL.
c. The re",lator mllSt be mawned iD the aperatiAl pasitiaa "'hen electric.1 settings are
checked and adjllSted ami it mllSt be ot OperatiDl temperatllle.
d. Specified ....... tor speeds for testiDl ami adjllStiDl.
1.
Volt .. e Reau.\ator
(a) OperatiDl lpeed.
2. Curreal Reau.\ator
(a) AU ....... tors mllSt be operated at • speed sufficient to produce current in escesl
of specified -unl.
(b)
Volt_ of the leaerator mllSt be kept
hiah
enouail to iDa .... sufficient curtent out-
put.
bat
below the operatilll volta. of the voltage ""ulatar unit.
e. After any
tests
or adjllStments the leaerator 011 the airCraft ..... t be polarized after lead •
• re CODDected. but before the eliDe il
-.t~
. . . faUows:
After recoanectiDl
Iud ••
momeatarily coanect • jumper lead between the
"GEN"
and
"BAT" termiDaIs of the re",latar. This .Ua ••• momentary surl" of current to now througb the
lener.tor wbich conectly polatize. it. F.U .... to do this m.y reswt in severe d.mage to tbe
equ.ipmea.t siDee reversed. polarity caue. vibntioa., aciD&. &ad bumia.& af the relay contact points.
9-30. Cleaning Contact Point •• The contllet points of • re",lator wiU not oper.te indefinitely
"ith""t SOllIe attetiOll. It bas been fOllDd that. "".t majority of .U !'elulator trouble can be
eliminated
by
a simple cleanilll of the COlltact
poiDts. pillS some possible readjustment. The flat
points should be cleaned with. spoon or riffler
We.
On neptive _ded recwatars "bich h.ve
the n.t COlltact poiDt 011 :he reaulator _ _ • loosen the ccat.ct br.cket mOllDtiDg sere . .
10
that the braclcat can be tilted to cae side. A flat
file
cannot be ... ed successfully to clean tbe
fl.t COlltact poiDts since it will,not toach the center of
the
flat poillt wbere point wear is most apt
to occur.
M .... ., u.e ..... ,.,
cloth or
.~pa,.r
t. clea" the cOfttCIct point •. Remove all the oxides
from the contact points
bu.t
note that
it is
not DeC8SSary to remove any cavity !:hay may bave
developed.
I
I
TO CLEAN CONTACT POINTS
(LOOSIN UJIfIII CONTACT
IUQ'n
IIIOUItI'DlO SClIWS)
FIGURE
9-,.
USE OF RIFFLE FILE TO
CLEAN CONTACT POINTS
ELECTRICAL SYSTEM
ISSUED: 8/18/72
MOUNTING SCREWS
fLDOllN
fa
SIT 411
cu.P)
All GAP
10tICX
'IImI4
IIOINTS
JUST
FIGURE
9-5.
VOLTAGE REGULATOR AIR
GAP CHECK AND ADJUSTMENT
3
A24