Chevrolet Corvette 1963 Repair & Tune-Up Manual page 81

76 ENGINE AND ENGINE REBUILDING
with the alternator to avoid overstressing
the lead wire.
5. Scribe alignment marks to indicate the
relationships between the end frames and the
main base. These components must be prop
erly aligned during assembly.
6. Remove the slip ring (rear) end frame
attaching bolts (3) and carefully pry the end
frame off of the main case assembly. Pry
around the circumference of the frame to
avoid damaging the frame.
7. Remove the drive end frame attaching
bolts (3).
8. Remove the end frame, rotor, and pul
ley as an assembly.
9. Remove the shaft nut, washer, pulley,
and woodruff key from the rotor shaft and
slide the rotor out of the end frame.
10. If you plan to test the diodes and sta-
tor, disconnect the stator leads from the
diodes using either of the following meth
ods.
a. Cut the leads between the stator
windings and the diodes
b. Scrape the epoxy coatings from the
leads and unsolder die leads from the
diodes.
CAUTION: If you choose method "b", be
sure to use a minimum amount of heat to
avoid damage to the diodes.
11. Remove the heat sink retaining screws
and remove the heat sinks. Remember that
the insulated heat sink contains the positive
diodes and that the insulated heat sink is the
one with the "batt" terminal.
12. Testing and/or replacement of bear
ings or diodes should be performed at this
time, if necessary.
Assembly of the alternator is the reverse of
the previous steps. Note the following points
during assembly:
a. Refer to the illustration which ac-
companies the "Brush and Holder Re-
placement" procedure for wiring informa-
tion.
b. Solder the stator lead-to-diode con
nections, if separated during step 10.
c. Align the scribed marks made during
disassembly.
d. Lightly clamp the pulley in a soft-
jawed vise when installing the pulley nut.
Torque the pulley nut to 50-60 ft. Ibs.
e. When installing the brush holder,
push each brush into the holder and retain
with a straightened paper clip during in
stallation. Remove the clip after the holder
is installed.
Internally Reglated Type
1. Place alternator in a vise, clamped by
the mounting flange only.
2. Remove the four through bolts and
separate the slip ring end frame and stator
assembly from the drive end and rotor as
sembly, using a screwdriver to pry the two
sections apart. Use the slots provided for the
purpose.
NOTE: Scribe matchmarks on the parts to
aid in assembly.
3. Place a piece of tape over the slip ring
end frame bearing to prevent entry of dirt;
also tape shaft at slip ring end to prevent
scratches.
4. Clean brushes, if they are to be reused,
with trichloroethylene or carbon tetrachlo-
ride solvent. Use these solvents only in an
adequately ventilated area.
5. Remove the stator lead nuts and sepa
rate the stator from the end frame.
6. Remove the screw that secures the
diode trio and remove diode trio.
NOTE: At this point, test the rotor, recti-
fier bridge, stator and diode trio if these
tests are necessary.
1. Remove the rectifier bridge hold-down
screw and the BAT terminal screw, then dis-
connect condenser lead. Remove rectifier
bridge from end frame.
8. Remove the two securing screws and
brush holder and regulator assemblies. Note
the insulating sleeves over the screws.
9. Remove the retaining screw and con
denser from the end frame.
10. Remove the slip ring end frame bear
ing, if it is to be replaced, using the proce
dure given later in this section.
11. Remove the pulley nut, washer, pul
ley, fan and spacer from the rotor shaft, using
5
a /ie in. alien key to hold the shaft while
loosening the nut.
12. Remove rotor and spacers from drive
end frame assembly.
13. Remove drive end frame bearing re
tainer plate, screws, plate, bearing, and
slinger from end frame, if necessary.
14. To assemble, reverse order of disas
sembly. Pulley nut must be tightened to 40-
50 ft. Ibs.
CLEANING AND INSPECTION
1. Clean all metal parts, except stator and
rotor assemblies, in solvent.
2. Wipe off bearings and inspect them for
pitting or roughness.