Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 214 / 468

6C-20
OVERHAUL MANUAL
G A U G E F R O M TOP OF C A S T IN G TO TOP
OF F L O A T — G A U G IN G P O IN T 3 / 1 6 " BAC K
F R O M END OF FLO AT A T TOE (SEE IN S ET )
(IN S E T )
G A U G IN G P O IN T
( 3 / 1 6 ” BACK
F R O M TOE)
©
P U S H FLO AT D O W N
L IG H T L Y A G A IN S T NEEDLE
(
4
) R E M O V E FLO AT A N D B EN D FLO AT
A R M UP OR D O W N TO A D J U S T
(
5
) V IS U A L L Y CH EC K FLO A T A L IG N M E N T
W AFTER A D J U S T IN G
Fig. 6 C - 5 6 -F lo a t Level A d ju s tm e n t
15. Carefully lift one corner of the air horn gasket and
install pum p plunger in the pum p well by pushing the plunger
to the bottom of the well against return spring tension. While
holding in this position, align pum p plunger stem with hole
in gasket and press gasket in place.
Air Horn
1. If removed, install choke shaft, choke valve, and two
attaching screws. Tighten screws securely and stake lightly
in place.
2. Check choke valve for freedom of movement and
proper alignment before staking screws in place.
Air Horn to Bowl Installation
1. Holding down on air horn gasket at pum p plunger
location, carefully lower air horn assembly onto float bowl
making sure that the bleed tubes, accelerating well tubes,
pull-over enrichm ent tubes (if used), and pum p plunger stem
are positioned properly through the holes in the air horn
gasket.
CAUTION:
Do not force the air horn assembly
onto the bowl but rather lightly lower in place.
2. Install two long air horn screws, five short screws, and
two coutersunk screws into prim ary venturi area.
Install secondary air baffle beneath screw num ber 3 and 4.
All air horn screws m ust be tightened evenly and
securely. See Figure 6C-57 for proper tightening sequence.
3. Install vacuum break diaphragm rod into the slot in
lever on the end of the air valve shaft. Then install the other
end of rod into hole in the front vacuum break diaphragm
plunger. Install front vacuum break control and bracket
assembly to air horn using two retaining screws through the
bracket. Tighten screws securely.
NOTE:
D o not attach vacuum break hose until vacuum
break adjustm ent is completed. Refer to Service Section
for adjustm ent procedure.
4. Connect upper end of pum p rod to pump lever by
placing rod in specified hole in lever. Align hole in pum p lever
with hole in air horn casting using J-25322. Using small
screwdriver, push pum p lever roll pin back through casting
until end of pin is flush with casting bosses in air horn (Fig.
6C-58).
C A UTI0 N:
Use care installing the small roll pin to
prevent damage to pump lever casting bosses.
5. Install two secondary metering rods into the
secondary metering rod hanger (upper end of rods point
toward each other). Install secondary metering rod holder,
with rods, onto air valve cam follower. Install retaining screw