Chevrolet 70 1969 Series, Shop Manual

Page: 743 / 913

ENGINE ELECTRICAL 6Y-28
1. Place inner (short) spacer on pulley end of rotor
shaft, then install drive end frame and bearing assem­
bly on rotor shaft with bearing inner race in contact
with spacer.
2. Place outer (long) spacer on rotor shaft, then install
pulley key and pulley. Retain pulley with spring wash­
er and self-locking nut. Tighten pulley nut to 60 foot­
pounds torque (fig. 4).
3. Place stator and shell assembly over rotor and into
place at drive end frame. Dimples in stator shell serve
to properly locate end frames on stator shell. While
holding special T-shaped nut in opening in stator
shell, install drive end frame bolt with lock washer.
Before tightening bolt, install remaining two bolts,
lock washers, and special nuts, then tighten the three
bolts evenly and solidly.
4. Place rear bearing seal ring in groove in slip ring end
frame, and add Delco Remy Special Lubricant, Part
No. 1948791 or its equivalent to bearing cavity. Refer
to Figure 11.
C A U T IO N : Do not fill the reservoir m ore than
half full. O verfilling will
cause the b e a rin g seal
to be p u sh e d out of place or the b e a rin g to b e ­
com e overheated.
5. Move the slip ring end frame into position with recess
in frame aligned with dimple in stator shell, and guide
capacitor and relay lead out through brush holder
opening in end frame. With slip ring end frame posi­
tioned on stator shell, assemble bolts, lock washers,
and special nuts to secure end frame to stator shell.
Tighten bolts evenly and solidly.
6. Referring to Figure 12, attach insulated generator
brush lead to brush holder with terminal bolt, nut,
and lock washer. Compress brush spring into brush
slot, insert brush against spring and wrap brush lead
over “ catcher” as shown. Insert the two brush holder
mounting screws and lock washers through holes in
capacitor bracket, and place grounded brush lead on
one screw as shown. Insert mounting screws through
mounting holes in brush holder, then assemble brush
spring and grounded brush in slot in brush holder and
wrap lead around “catcher” to hold brush in place
until brush holder is installed.
7. Move brush holder and capacitor assembly into place
and screw the two mounting screws into threads in
end frame. Disengage brush leads from catcher to
permit brushes to move into contact with respective
slip rings. Install wire connector socket and blade
type terminals over terminal screws, attach relay lead
on terminal screw as shown in Figure 3, and install
the retaining nuts.
S P R IN G A N D B A C K ASSY.
Mounting Screws
To Position Parts
Field
Terminal
Wrap Leads Over
“Catcher” To
Hold Brushes
F ig u re 1 2 — B ru s h a n d B ru s h H o ld e r In s ta lla tio n
F ig u re 1 3 — C o n n e c t io n s fo r B e n c h T e s tin g G e n e ra t o r
BENCH TEST AFTER ASSEMBLY
Figure 13 shows wiring connections for making genera­
tor output test on bench.
Refer to test specifications given at end of this section,
and while operating generator at specified speed, adjust
load rheostat to given specified voltage. A m m eter will
show generator output which must be within range speci­
fied.
C A U T IO N : W h e n m a k in g battery connection,
a lw a y s connect N e g a t iv e term inal to generator
g r o u n d ( " G R D " ) terminal. R E V E R S IN G THE
B A T T E R Y C O N N E C T IO N S WILL D A M A G E G E N ­
ERA TO R.
CHEVROLET SERIES 70-80 HEAVY DUTY TRUCK S H O P M A N U A L