ENGINE ELECTRICAL 6Y-27
connected to the generator output terminal is
insulated from the shell and contains the posi
tive diodes. The other heat sink is grounded to
the shell and contains the negative diodes.
To replace a defective diode, scrape away epoxy coat
To Install D iode, Su p p ort
Flat H eat Sin k Surface
To R e m o v e D iode, Su p p ort
A n d Press D io d e In
° fher Sid e o f H ea t Sink
TPM-9803
F ig u re 1 0 — D io d e R e p la c e m e n t
ing, then cut only the leads connected to that particular
diode stem. Use diagonal cutters to clip the leads as close
to the diode stem as possible.
Support the outside of the heat sink around the defec
tive diode with the special heat sink support tool (J-
9717-2) and locate the special diode removal tool (J-
9717-1) over defective diode inside the shell assembly. Use
an arbor press to push the defective diode out of the heat
sink.
C A U T IO N : D o not strike the assem bly, as the
shock m a y d a m a g e the g o o d diodes.
To install a new diode, support the flat heat sink sur
face underneath the diode hole with a smooth flat surface,
such as the support tool (J-9717-2), and press the new
diode into the heat sink with an arbor press. Use the spe
cial installer tool (J-9600-2) which just fits over the out
side ecge of diode.
Figure 10 identifies diodes and provides instructions for
supporting heat sink for each operation. After diode is in
stalled, resolder the leads to diode stem which were dis
connected from defective diode and cover with epoxy.
NOTE: Limit soldering time to a minimum so
excessive heat will not dam age diode.
ASSEMBLING GENERATOR
Follow the steps in sequence given to assemble the gen
erator major components. Refer to cross section view of
generator (fig. 1) for identification of various parts, except
as otherwise indicated.
F ig u re 1 1 — S lip R in g E n d F r a m e P ro p a ra tio n for In sta lla tio n
1. Slip Ring End Frame
2. Bearing Lubricant
3. Rotor
4. Capacitor
6. Bearing Assembly
5. Lead (To Relay
7. Bushing
Terminal)
8. Bearing Seal Ring
CHEVROLET SERIES 70-80 HEAVY DUTY TRUCK SH O P M A N U A L
Содержание 70 1969 Series
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