GMC C Series 1993, Repair Manual

Page: 230 / 264

CS-144 GENERATOR 6D2-9
9. Capacitor.
• Make sure the side with the insulator material is
placed against the end frame (ground).
10. Two bolts (6) through the rectifier bridge (figure 9).
11. Two insulated screws (38) through the rectifier
bridge.
ALL MODELS:
• If the brush holder, regulator, or connector has
been replaced, connect it by crimping the connec­
tors) to the other component(s). Then solder the
connection using as little heat as possible to avoid
heat damage to the regulator (figure 11).
12. Brushes (130) into the brush holder (131).
A. If the brushes are being reused, be sure they
are clean. Wipe them with a clean dry cloth.
B. Retract the brushes in the holder.
C. Retain the retracted brushes with a toothpick or
retaining pin.
D. Be sure that the pin or toothpick extends
through the end frame when the brush holder is
in place. After the rotor and drive end frame are
installed, the pin or toothpick will be pulled out,
allowing the brushes to contact the slip rings.
13. Brush holder (9), regulator (16), and connector (10)
into the end frame (figure 7).
•The metal side of the capacitor strap should
rest against the regulator connection.
14. One bolt (15) into the brush holder.
• If a brush holder with locator bosses is being
replaced with a holder without locators, be sure
to align the brush holder assembly and hold it
with your fingers while tightening the brush
holder attaching screw.
15. Two insulated screws (12, 13) through the regulator
connector.
16. Stator (18) into the end frame, aligning the three
stator leads to the three rectifier bridge terminals,
(figure 15).
17. Three rectifier bridge nuts (7). Tighten the nuts
securely.
m
DRIVE END FRAME
Assemble (Figures 4 and 5)
Figure 16— Installing the Slip Ring End Bearing
• Slip ring end bearing into the slip ring end
frame (some models).
l
, — To install a roller bearing in the end frame,
press the bearing in from the outside of the
frame until if is flush with the outer edge of
the frame.
4. Rotor shaft through the inside collar (20) and
through the end frame (22).
5. Outside collar (23), fan (24), and fan collar (25)
onto the shaft (figure 5).
N O T IC E : R e fe r to “N o tic e ” o n p a g e 6 D 2 -1 o f
th is s e c tio n .
6. Pulley (26), washer (27), and pulley nut (28) pnto
the shaft.
Q Tighten
• Nut to 100 N-m (74 ft. lbs.).
1. Drive end bearing (21) into the frame (figure 5).
• Press against the outer race to press the bear­
ing into place.
2. Retainer (19) with three screws on models so
equipped.
3. Slip.ring end bearing: ,
N O T IC E : O n m o d e ls w ith a s lip rin g e n d b a ll
b e a rin g o n th e ro to r s h a ft, th e b e a rin g m u s t
b e re p la c e d w ith a n e w b e a rin g a n y tim e th e
tw o h a lv e s o f th e g e n e ra to r a re s e p a ra te d . I f
n o t re p la c e d , th e b e a rin g m a y b in d a n d fa il
la te r d u e to d is to rtio n o f its o u te r to le ra n c e
rin g s . T h is d o e s n o t a p p ly to ro lle r-ty p e s lip
rin g e n d fra m e b e a rin g s .
• New slip ring end bearing (4) onto the rotor
shaft (figure 4) (some models),
.— To install the ball bearing on the rotor shaft,
press against the inner race until the stop is
reached.
MAIN ASSEMBLY
Assemble
1. Drive end frame (22) and rotor assembly to the slip
ring end frame, lining up the marks.
• Carefully guide the Slip ring end bearing (if pre­
sent) into the slip ring end frame.
• Be sure the tolerance rings on the bearing outer
race are not damaged.
2. Four through bolts (17), Tighten securely.
• Remove the brush retainer from the end frame.
• Test the generator output.