Piper Comanche PA-24 Service Manual page 719

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PIPER COMANCHE SERVICE MANUAL
!}-89. Storti", _or c...trol Circuit.
a. Inspect the cClltrolciralit wiriaa between the battery. solenoid and manualltatting switches
for breaks, poor
CoanectiODS
aDd faulty iasulatioa.
Tipten allccanecticms and make sure solenoid
is
firmly mOIlD!ed md makes a good &round connection.
b. Check the voltage loss across the •• itch coDtllCto durinl no""al
starting.
If loss is in
excess of 0.2 volts per 100 amperes, tile solenoid shadd
be
replaced.
c. If solenoid faila to operate .han the manUal is tumed
00
or if it fails to release. when the
manual • ..,itch ia released, it sh""ld
be
removed and tested to specifications. If eitber opening
or closing voltaps are not specified, replace tile solenOid.
9-90. Storti", Motar Service T.st Specifications .• Preltolite specificatiCils for 12-volt 5taning
motors installed as standard equipment on tile PA·24 airplanes are as folIo .... :
Motor Model MZ-42re
Min. Brush Tension 32 oz.
Max. Brush Tension 40 oz.
No-Load Test (77' F)
Volt 10
Max. Amps
7S
Min. R.P.M. 2000
Stall Torque
Amps
560
Min. Torque, Ft. Lbs.
38.0
Appro>:. Volts
4.0
PiniCII Position
(1)
Drive at rest 1.748 to 1.855 in.
Drive estended 2.388 to 2.495
111.
11
J
This dimenaion is measured from the
ceDter.Li.ae
of.
the mounting
hole nearest tile drive end head to the edee
01.
tbe pinion.
3
C19
ELECTRICAL SYSTEM
ISSUED: 8118n2