Chevrolet 70 1969 Series, Shop Manual

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ENGINE ELECTRICAL 6Y-18
F ig u re 1 1 — S lip R in g E n d F ra m e w it h H e a t S in k R e m o v e d
F ig u re 1 2 — H e a t S in k w it h Positive D io d e s a n d Ju n c tio n S tu d s In sta lle d
sink, place insulaiing washers in slip ring end frame
as shown in Figure 11, then locate heat sink assembly
on washers in end frame. Be sure leads on diodes in
end frame protrude through holes in heat sink, as­
semble “ BAT” and “ G R D ” terminal bolts, insula­
tors, and washers in the order shown in Figure 10.
Place lower end of strap (fig. 14) on junction stud and
tighten screw at brush holder.
5. Attach capacitor lead with screw, insulator, flat wash­
er, and lock washer, making sure the insulating wash­
er between heat sink and end frame is in place. Place
diode leads in pairs on the three junction studs.
NOTE: Do not install nuts on studs until stator is
being assembled to slip ring end frame.
Diode Junction Stud and Insulators
Diode junction studs and insulators are available for
service replacement. Stud and insulator are shown in Fig-
F ig u r e 1 3 — In s ta llin g C a p a c it o r in E n d F ra m e
B R U S H H O LD ER, B R U S H E S A N D A S S O C IA T E D
PA R T S D IS A S S E M B L E D
F ig u r e 1 4 — B ru s h a n d B ru s h H o ld e r In sta lle d
1. Relay Terminal 10. Brush Insulator
2. Brush Holder 11. Field Current Brush
3. Strap 12. Brush Springs
4. Strap Insulator
13. Field Terminal
5. Ground Brush 14. Diode Junction
6. Washer Stud
7. Ground Screw
15. Brush Retaining Pin
8. Brush Holder Screw (For Assembling On
9. Washer 16. End Frame
ures 10 and 12. To remove studs, support heat sink at flat
side and press studs out of insulators. With pliers, remove
CHEVROLET SERIES 70-80 HEAVY DUTY TRUCK SH O P M A N U A L