Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 203 / 468

CARBURETOR
6C-9
M A IN
METERING
JETS
VALVE
Fig. 6 C -2 4 -R e m o v in g Fast Id le Cam
overhaul. The service pum p assembly uses a grooved pum p
plunger stem and retaining clip. A fter removing the inner
pum p lever and pum p assembly, remove the outer pum p lever
and shaft assembly from air horn. Remove the plastic washer
on pum p plunger shaft.
12. Remove air horn gasket from air horn.
13. Remove fuel inlet baffle next to needle seat.
14. Remove two choke valve attaching screws, then
remove choke valve. Care should be taken when removing
attaching screws so that the choke shaft will not be bent. It
Fig. 6C-25--Power Piston
Fig. 6 C -2 6 --F lo a t B o w l
may be necessary to file off staked ends on choke valve screws
before removing.
15. Remove choke valve shaft from air horn.
16. Remove the fast idle cam rod and lever from the
choke shaft.
Float Bowl (Fig. 6C-26)
1. Remove pum p plunger return spring from inside
pump well (Fig. 6C-27). Then remove aluminum check ball
from bottom of pum p well by inverting bowl.
2. Remove main metering jets, power valve and gasket
from inside float bowl.
3. Remove three screws holding venturi cluster to float
bowl and remove cluster and gasket. Then remove the plastic
main well inserts in the main well cavity (Fig. 6C-28).
4. Using a pair of long nosed pliers, remove pump
discharge spring retainer (Fig. 6C-29). Then, spring and
check ball may also be removed from discharge passage.
5. Invert carburetor and remove three large throttle
body to bowl attaching screws and lockwashers (Fig. 6C-30).
T hrottle body and gasket may now be removed.
Throttle Body
1. Remove the three choke cover attaching screws and
retainers, then remove therm ostatic coil and cover assembly
and gasket from choke housing (Fig. 6C-31).
CAUTION:
Do not remove cup baffle from beneath
thermostatic coil cover because coil distortion may
result.
2. Remove baffle plate from inside choke housing (Fig.
6C-31).
3. Remove the two choke housing attaching screws from
inside choke housing, then remove choke housing and gasket
from throttle body casting (Fig. 6C-31).
4. Remove screw from end of interm ediate choke shaft
and remove interm ediate choke lever from shaft. Remove
inner choke coil lever and shaft assembly from choke
housing. Remove rubber dust seal from inside choke housing.