Piper Comanche PA-24 Service Manual page 679

PIPER COMANCHE SERVICE MANUAL
.... ClA'
I~
TO ... All . . "
FIGURE 9·9. CUTOUT REU.Y
AIR GAP CHECK AMD ADJUSTMENT
current
now
to the required
1IID0UDt.
• STOll
FIGURE 9·10. CUTOUT RE I..AY
POINT OPENING CHECK AHD ADJUSTMENT
Allow lenerator to operate at this speed aDd current flow for 15 minu.tes with relulator
cover in place in orcI.er to bring the voltage reculator to operatinC temperature.
e. Cycle the &enerator by either method listed in Step (el of "Fixed Resistance
~ethod"
of
"Volta. Setting" ~oced\Ue.
f. "ote the thermometer re.:!ing and select the uNormal Range" of voltage for this tempera-
ture as listed
ttl
specificatia1s paragraph 9-41.
g. Note the voltmeter reacUnl with relu.lator cover in place.
h. Adjust volt .. e resWator .. required .. described in Step (h) of "Fixed Resistance Method"
of "Voltag. Setting Procedure." In usiag the v.iable resistance method.
it
is necessary to re-
adjust the vuiab1e resistance after each yoltate adjustment to assure that 8-l0 amperes are
flowing. Cycle &eneratar after eacb adjustment before readine voltage regulator setting
with
cover
in place.
9-34. C .. tout Relay. The
cutout
relay requires three
checks
and
adjustments:
air gap.
point
Openinl,
and. closing voltage.
The
air gap and point
open1tl&
ildjustments must be made with the
battery disconnected.
8.
Air Gap - Place fingers
CIl
armature d.irectly above core and move armature down until
points just close and tben measure air cap between. armature and center ot core (Figure 9-9). On
multiple ccmtact point relays. make sure tbat all points close simultaneously. If they do
i10[,
bend
sprinl finler so they do. To adjust air IIIP, loosen t"Wo screws at the back of relay and :-aise or
lower the arm8Uue as required. Tichten screws after adjustment.
b. Point Opening - Check POUlt openmg and adjust by bending the upper armature stop (Figure
9-10).
c. Closing Vo1tale - Connect reaulator to proper generator and battery. Connect voltmeter
between the regulator "GEN" terminal and ground (Figure 9-11).
~Iethod
1 - Slowly increase generator speed and note relay clos1D.1 voltage. Oec:ease
3 83
EI..ECTRICAI. SYSTEM
ISSUED:
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