Chevrolet 1977 10 Series, Repair Manual, Page: 274 / 468

(200)7A-38 OVERHAUL MANUAL
43 44 45 46
1. M A N U A L V A L V E 17.
R E T A I N I N G C O I L E D PIN
33. T H R O T T L E V A L V E
2. R E T A I N I N G C O IL E D PIN 18. R E T A I N I N G C O I L E D PIN
34.
R E T A I N I N G C O I L E D PIN
3. I N T E R M E D I A T E BOOST SPRING 19. D IR E C T C LU T C H E X H A U S T SPRING
35.
D E T E N T PIN
4. I N T E R M E D I A T E BOOST V A L V E
20.
D IR E C T C L U T C H E X H A U S T V A L V E
36. T H R O T T L E V A L V E SPRING
5. 2-3 S H I F T V A L V E
21. REVER SE BOOST V A L V E
37. T H R O T T L E V A L V E PLUNG ER
6. 2-3 T H R O T T L E V A L V E
22. R EV ER SE BOOST SPRING
38. T H R O T T L E V A L V E PLUNGER BUSHING
7. 2-3 T H R O T T L E V A L V E SPRING
23. REVER SE BOOST BORE PLUG
39.
R E T A I N I N G C O I L E D PIN
8. 2-3 T H R O T T L E V A L V E BUSHING
24.
R E T A I N I N G C O I L E D PIN
40.
1-2 A C C U M U L A T O R SPRING
9. R E T A I N I N G C O I L E D PIN
25.
R E T A I N I N G C O I L E D PIN
41. 1-2 A C C U M U L A T O R PISTON S E A L
10. R E T A I N I N G C O I L E D PIN
26.
1-2 A C C U M U L A T O R BORE PLUG
42. 1-2 A C C U M U L A T O R PISTON
11. LO O V E R R U N C L U T C H SPRING
27. 1-2 A C C U M U L A T O R V A L V E
43. CHE CK B A L L # 4
12. LO O V E R R U N C L U T C H V A L V E
28.
1-2 A C C U M U L A T O R V A L V E SPRING
44. CHE CK B A L L # 3
13. 1-2 S H I F T V A L V E
29. S H I F T T .V. V A L V E
45. CHE CK B A L L # 2
14.
1-2 T H R O T T L E V A L V E
30. S H IF T T.V. SPRING
46. CH ECK B A L L #1 (Note: 5th Check
15. 1-2 T H R O T T L E V A L V E SPRING 31. R E T A I N I N G C O I L E D PIN
Ball Is In The Case)
16. 1-2 T H R O T T L E V A L V E BU SHIN G 32. S H IF T T .V . BORE PLUG
Fig. 7A-1 5 2 A - C o n t r o l Valve A s s e m b ly - Ex p lo d e d V i e w
2. Install into lower left bore, 1-2 accum ulator spring,
1-2 accum ulator valve, smaller stem end out. Install bore
plug, hole out, and coiled pin.
3. In next bore up, install direct clutch exhaust valve,
longer stem end out, direct clutch exhaust spring and coiled
pin.
4. In next bore up, install low overrun clutch valve,
longer stem end out, low overrun clutch spring and coiled
pin.
5. In next bore up, install interm ediate boost valve,
longer stem end out, interm ediate boost spring and coiled
pin.
6. In lower right bore, install throttle valve, smaller
outside diam eter land first, m aking sure valve is seated at
the bottom of the bore. Install inner coiled pin between the
lands of this valve (Fig. 7A-155A). Install the detent pin into
the shift T.V. spring and install these 2 parts into the bore.
Install the throttle valve plunger, stem end first, into the
throttle valve plunger bushing and install these 2 parts into
the bore, valve end first. Install outer coiled pin from rough
cast surface side, aligning pin with slot in bushing.
7. In next bore up, if removed, install shift T.V. valve,
larger outside diam eter stem end out, shift T.V. spring and
coiled pin. Then, using plastic ham m er, install new shift
T.V. plug flush with rough casting surface.
8. In next bore up, install reverse boost valve, stem end
out, reverse boost spring. Install bore plug, hole side out and
coiled pin.
9. In next bore up, install 1-2 shift valve, longer stem
end out, making sure valve is seated at the bottom of the
bore. Install 1-2 throttle valve spring into the 1-2 throttle
valve bushing and 1-2 throttle valve, stem end first, into the