Piper PA-24 Comanche Service Manual page 549

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PIPER COMANCHE SERVICE MANUAL
IJOtNT OPINING
FIGURE 9·9. CUTOUT RELAY
AIR GAP CHECK AND ADJUSTMENT
FIGURE 9.10. CUTOUT RELAY
POINT OPENING CHECK AND ADJUSTMENT
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CUrrent flow to the required
amOUDt.
Allow senerltor to operate at this speed and current flow for
is
minutes with resulator
cover in illaee in order to brine the voltace telUlator to operatic, temperatW'e.
e. Cycle the &enerltor by either methad listed in Step <e) of "Fixed Resistance ~ethod" of
"Voltap Settin," proeedure.
I,
~ote
the themometft
recin,
and seleet the "Normal Ranle"
of
volt ... for this tempera-
ture as listed
in
spec:ificaticns paraCraph 9-4].
g. Note the voltmeter readiul with regulatot cover in place.
h. Adjust voltale rellllatar .. required as described in Step(h) of "Fixed Resistance
Method"
of "Voltace Sertina Procedure." In usmc the v_iable resistanee methocl. it is necessary to re·
adjust the variable resistance after each volta.. adjustment to uaure that
8-10
ampe~s
are
HowinS. Cycle generator after each adjustment before re-Sincvolta,e relulator settina wlth cover
in place.
9-34. Ciltout Relay. The eutaat relay requires three_ cheeks and adjustments: air aap. point
openin,. and elo'inc volta• . The air liP and point openinC adjustments must be made with the
battery disconnec:ted.
a. Air Gap - Place fmlers en umatlUe directly above core and move Irmature down until
points just close and then measure air sap between armature and center of core (Filllte 9--9). On
multiple eattaet paint relays. make sure that all points close
I
imultaneously .
If
they do not, bend
spring fineer so they do. To adjust air lap. loosen two screws at the back of relay and :aise or
lower ~he arm.ture as required. Tishten screws after adjustment.
b. Point apeninc - Check point Op8rtUtC and adjust by bendinl the upper armature stop (Figure
9-10).
c. Closing Voltaee - Connect rel\11.tor to propet lenerator and battery. Connect voltmeter
berween the regulator "GEN" terminal and around (Filure 9-11).
:\tethod 1 - Slowly increase &enerator speed and note relay closinl voltale. Decrease
ELECTRICAL SYSTEM
ISSUED: 8/18/72
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