Piper Comanche PA-24 Service Manual page 713

PIPER COMANCHE SERVICE MANUAL
connections. Poor connections cause arciDI aDd buminl of the commutator.
U
the bars are nat
badly burned, ,"older the l_adl in the riser bars .. d tum the comlllutator d ...... in a lithe. Then
undercut 1be insulation bet ...... the cOllllllutator bars
1/32".
3. Grounds in the armature can be detected by the use of • test lllllp ... d prods. If the lllllp
lilhts wilen o.e test prod is pieced on the COllllllulator and other tesl prod on the armature core or
Illaft, the armature il """nded. If the commutator is "'om, ditty, out of round, or h .. hilh insu-
lation, the commutator should be turned down and undercut .. previously described. -
c. Field Coils - The field coils Illouid be checked for &rOunds ODd opens using a test lamp.
1. Grounda - Disconnect field coil pound connections. COGnect one test prod to the field
frlllle ... d the other to the field connector. If the lamp lilhts, the field coils are grounded ... d
must be repa.ired or replaced.
2. Opens - Connect te.t lamp prods to ends of field coils. If lamp does not light, the
field coil. are open.
If the fie Id coil. need to
be removed for repair or "placement, a pole shoe spreader and
pole sboe screwdnver sbould
be
used. Care
s~"l!d
be
ezercised in replaCing the field coils to
prevent grounding or sllorting them as they
III
.&btaned into place. Where the pole shoe has •
loftglip on one side, it should be assembled in the direction of armature rotation.
9-72. Rea ••• mbly. To reassemble the motor follow the disassembly procedures
in
reverse.
lastall new tang lock wasbers where removed.
CAUTION
If Folo-Thru drive is manually rotated to locked position, do not
attempt to force it in a reverse direction. Proceed to install with
pinIon meshiDg with flywheel. When engine starts, the drive will
retum to
~he
demeshed
~ositlon.
9-73.
Cranking Mater Servic.
T ••
t Specificatie" •.
Oelco--Remy specificatir.ms for 12 volt cranking
motors Installed as standard equipment on the PA-24 aircraft are as foUows:
Motor Model 1109511
1109679
1109688
1109695
Delco-Remy, Ref. Service Bulletin
lM-110
:'din. Brush
TenSion
24 oz.
No Load Test
Volt
10.6
~in Amps
Max. Amps 60
Ilin. R.P .M.
3000
Max. R.P .:.1.
3
C13
-1109689
1109673
lM-110
24 oz.
11.3
65
4000
1113471
lM-110
80 oz.
11.5
SO
70
1 .. 00
2200
ELECTRICAL SYSTEM
ISSUED: 5/\/65