Piper COMANCHE PA-24-180 Service Manual page 573

PIPER COMANCHE SERVICE MANUAL
SEAL-INSTALL SEAL
WITH LIP
TOWARD BEARING
INNER RACE
SPACER
GREASE
CAVITY
BEARING
FIGURE 9-2k. TERMINAL ASSEMBLY
FIGURE 9-271. SLIP RING END
BEARING ASSEMBLY
should be installed after the unit has been bench tested for output. Install spacer, woodruff kev.
fan, pulley, lock washer and nut. Torque the nut to 35 foot pounds, using a strap wrench to hold
the pulley. Do not install the blast tube usembly until after the unit has been bench tested.
g. Install the brush and holder assembly and retaining screws. Spin the rotor and check for
interference between the brush holder and rotor. Check across the field terminals with an ohm-
meter. The ohmmeter must indicate the amount of rotor resistance listed on the individual soeci-
fications page.
9-61i. Testing Of Alternater.
a. Wiring connections for bench testing
the alternator are shown in Figure 9-27m.
Refer to the' idividual
specification pages
for output test figures. Adjust the carbon
pile, if necessary, to obtain the specified
voltage.
b. After bench testing the alternator, in-
stall the safety wire and blast tube and
install the alternator on the engine.
NOTE
Always refer to the wiring aia-
gram. Figure 9-2b. when in-
stalling the alternator or testing
the alternator.
FIGURE 9-27m. TESTING ALTERNATOR
ELECTRICAL SYSTEM
ISSUED: 8/18/72
3C3