Chevrolet 10 series 1973, Overhaul Manual

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CARBURETORS 6 M - 7
1. Air Horn Assembly
16. Choke Rod Compensator
46. C.E.C. Vacuum Tube
2. Screw—A ir Horn—Long
17.
Cam—Fast Idle 30. Screw—Cover 47.
C.E.C. Valve Nut
3. S crew -A ir Horn-Short
18.
Screw-Cam 31. Float Assembly
48. C.E.C. Valve Bracket
4.
B racket-A ir Cleaner
Attaching
32. Hinge Pin—Float 49.
C.E.C. Valve Bracket
Stud
19. Float Bowl Assembly 33.
Power Piston Screw
5.
Screw-Bracket 20.
Idle Tube Assembly
Assembly 50. Throttle Body
Attaching 21. Jet—Main Metering
34. Spring—Power Piston
Assembly
6. Gasket—Air Horn
22. Ball—Pump Discharge
35. Rod—Power Piston 51. Gasket—Throttle Body
7. Choke Shaft and
23. Spring—Pump
36. Metering Rod and
52. Idle Needle Limiter Cap
Lever Assembly
Discharge
Spring Assembly
53. Idle Needle
8. Choke Valve 24. Guide—Pump
37.
Filter N ut—Fuel Inlet 54.
Spring—Idle Needle
9. Screw—Choke Valve
Discharge
38.
Gasket—Filter Nut
55.
Screw -Throttle Body
10. Choke Vacuum 25. Needle and Seat
39. Filter—Fuel Inlet
56. Lever—Pump and
Break, Unit Assembly
40. Spring—Fuel Filter
Power Rods—New
11.
Vacuum Break Hose
26. Gasket—Needle Seat 41.
Idle Stop Solenoid
57. Screw—Lever
12. Vacuum Break Lever 27. Idle Compensator
42. Pump Assembly
Attaching
13.
Vacuum Break Link Assembly 43.
Lever—Pump
58. Link—Power Piston
14. Vacuum Break Lever
28. Gasket-Idle Actuating
Rod
Screw
Compensator
44.
Spring—Pump Return
59. Link-P um p Lever
15. Choke Lever
29. Cover—Idle
45.
C.E.C. Valve
Fig. M7—Legend for Monojet (Fig. M6)
bottom the new idle mixture needle and back off four
turns. Do not install plastic limiter cap at this time until
proper screw settings have been made.
After completing assembly of the carburetor, and when
installed in the vehicle, adjust the mixture screw to
achieve the idle speed and idle mixture settings as
outlined under "Additional External Settings and
Adjustments".
1. If removed, install idle mixture needle and spring
until lightly seated. Back out four turns as a
preliminary idle adjustment.
NOTE: The plastic limiter cap should not be
installed on the idle mixture needle until the
idle mixture has been adjusted, as specified,
on the engine.
NOTE: A new red plastic idle mixture needle
limiter cap is provided in the carburetor
repair kit and also in the idle mixture needle
and limiter cap kit. This cap must be
installed after the idle mixture needle has
been set on engine (see Specifications), by
backing off the new mixture needle the same
number of turns, after bottoming, as was
required to bottom the original needle which
was pre-set and sealed by the manufacturer
before it left the factory. (See "Note" in
disassembly procedures). Install a new limiter
cap.
2. Invert float bowl and install new throttle body to
bowl insulator gasket.
3. Install throttle body on bowl gasket so that all holes
in throttle body are aligned with holes in gasket.
4. Install two throttle body to bowl attaching screws.
Tighten evenly and securely (12 to 15 foot lbs. of
torque). The throttle body to bowl screws do not use
lock washers as they have an interference fit
designed into the thread for holding proper torque.
Float Bowl
1. Install fast idle cam to boss on float bowl, attaching
with fast idle cam screw. Tighten securely. Part
number on cam faces outward.
2. Install round seal into recess in idle compensator
cavity in float bowl.
3. Install idle compensator assembly with two (2)
attaching screws. Tighten securely.
4. Install idle compensator cover, with (2) attaching
screws. Tighten securely.
5. Install pump return spring into pump well. Make
sure spring is properly seated in bottom of well.
6. Install pump plunger assembly into pump well with
slide protruding through bottom of bowl casting.
Push downward on pump slide and install pump
drive link into hole in lower end of shaft. Ends of
drive link point towards carburetor bore. Tang on
upper end of link retains link to pump slide.
7. Install power piston and pump actuating lever to
lower end of link. Projection on this lever points
downward.
8. Install power piston spring into power piston cavity.
9. Install end of power piston actuating rod into
groove on side of power piston. Then install power
piston metering rod assembly and actuating rod
into float bowl. End of metering rod must enter jet
orifice.
OVERHAUL MANUAL