Starting Motor Central Circuit; Starting Motor Service Test Specifications - Piper PA-24 Comanche Service Manual

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PIPER COMANCHE SERVICE MANUAL.
9-89. Stortin, Motor Cafttrol Circuit.
a. Inspect the canuol circltit Wlrina between the battery, solenoid and manual starting switches
for breaks, poor cOllftechons and faulty luulation. Tipten aUcanMctions and make
Sllre
solenoid
lS
firmly
lIlo\lnt.d
and makes a 100d
arou.nd COIlnee:tlClll.
b. Check the voltale
l~s
acreal. the switch
COMlCts
dWUlI nonaal startilli.
1£
losa lS in
excess of
0.2
volts per
100
amperes, tbe solenold should be replactd.
e.
If
solenOld fans to operate _hen the manual l' tllmed oa or
if
it
fails
to rele.e when the
manual Switch lS releueel, it should be removed and te.ted to specifications. 1£
either openinl
or cloSlnl voltaps are not specified, replace the
IOl~oid.
9-90.
Startin, Mot.r Service T." S,ecificatlans.. Pre.toUt. specd'ications for U-volt Startinl
motors installed as standard. equipment on th. PA·24 airplanes are • follows:
Motor :\1odel
MZ~2Q5
Mln. Brush Tension 32 oz.
~ax.
Brush Tension 40
oz.
N~Load
Test
or
F)
Volt
10
Max. Amps 7S
~in.
R.P .:\1.
2000
Stall Torque
Amps 560
~in.
Torque, Ft. L.b•. 38.0
Approx. Volts
4.0
Pinlon Positlon
"i
Driv. at rest 1.748 to 1.855
in.
Drive extended 2.388 to 2.495 in.
l'IThis dimension is me.ured
frOID
the c:etlterlins d. the moW\tinl
hole neafest the drive end bead to the ed.s
of
the pinioa.
ELECTRICAL SYSTEM
ISSUED: 8/18/72
3
C19