Piper Comanche PA-24 Service Manual page 677

G ••
PIPER COMANCHE SERVICE MANUAL
FIGURE 9-6. ADJUSTING VOLT AGE
REGULATOR SETTING
9-32. Volta,. R8\lulotor. T .. o checka and
adjustJllents .... required
aD
the volta. "'8u-
lator, aU gap and volt • • setting.
a. Air Gap _ To check
air
pp, push ar-
lIIature down IIDtil the
CCIltact pOUlts are just
touchinl aad then oaeuu", air lap (F icure
~5).
Adj .. t
by
looaeDiDI the contact mounting
screws aDd raisin I or lowering
CCiltact
bracket
. . . . quire<!.
Be .ure the points are lined up
ODd ti&btet\ sere.s after adjustment.
9-33. Volta,. Settin,. There are t .... o ... y.
to cbeck the volta • • ettiAl-the fixed re-
sistance _thod and the vanable resistance
lIletbod (refer to ficure.
~7
and 9-8).
Fixed Resistance Method-
a. Coanect a fixed resistance between
the bellery terminal and &rouDd as shoWD in
Figure
~7
after dilcD!lllectinl the battery lead frem the bettery terminal of the reculator. The re-
sistance must be
1\\ aha for 12-volt UIIitl. It IIlUit
be
capable of carry in I 10 ampe",. without
aay cbaDle oi resistance with temperature chaoges.
b. CoaRct a voltmeter fram "'culator "BAT" tenaiAaJ to &round.
c. Place the thermometer within
~ iDch of regulator cover to measure re&Ulator ambient tem·
perature.
d. Operate generator at specified speed ror 15 minut_
with
relu!ator cover in place to bring
tbe voltage reculator to operatinl temperature.
R~GULATOR
F
GEM
("()) V .. ,UABLE
)=(
RUISTANCE
{
AXEO ReSiSTANCE
1
,·z
OHM
- 12 VOLT
,,-01.
F
VOLTMETER
GENER .. TOR
FIGURE
9-7.
CHECKING VOLTAGE
SETTING, FIXED RESIST AMCE METHOD
REGULATOR
.......... 11
F
VARIABLE
ry
RESISTANCE .o\MMETEA VOLTMETER GENERATOR
FIGURE
9-8.
CHECKING VOLTAGE
SETTING, VARIAILE RESISTANCE METHOD
3 81
ELECTRICAL SYSTE.'04
ISSUED: 8/18/72