Cadillac 54-6219 1954 Shop Manual page 268

12-37
ENGINE FUEL AND EXHAUST
2. Attach choke housing to bowl cover with 3
notched screws. The two longest screws go on
bottom of choke housing.
3. Assemble choke piston and pin onto link
attached to choke shaft.
4. Insert choke shaft into choke housing and
bowl cover being careful not to damage bore. Ro
tate shaft so that piston enters vacuum cylinder.
5. Install choke baffle plate with attached leaf
spring facing out, and holes over exhaust passage
and tang of choke piston lever.
6.
Install plastic thermostat cover and gasket
with 3 screws and retainers, so that scribed mark
on edge of cover lines up with the index mark.
7. Install choke valve with trademark up on
choke shaft with 2 new screws. Hold choke valve
tightly closed with the fingers while tightening
screws, to insure good alignment.
8. Carefully and lightly stake threaded ends of
choke valve screws, being careful not to bend
choke shaft.
9. Loosely install choke rod and choke lever,
both pointing forward. Secure choke rod and modi
fier rod with spring clip at lower ends.
e.
Bowl Cover Assembly
1.
Assemble metering rod spring into upper hole
of metering rod carrier and insert into slot within
dust cover
boss. Refer to Fig. 12-57.
NOTE: Projecting tang on metering rod link
must point rearward, or toward the air horn.
2. Start pump shaft into dust cover boss, then
install pump lever which fits onto the slotted por
tion of the pump shaft. Place metering rod lever on
end shaft after passing through second bearing.
3. Tighten metering rod lever set screws. Install
idle vent arm and tighten screw. Final adjustment
will be performed later, as outlined in Note 3d.
4. Install fuel straincr with plug and gasket, on
primary side. Install brass plug and gasket on
secondary side.
5. Invert bowl cover, and install primary and
secondary needle valve seats with gaskets, using
a screwdriver.
7. Install primary and secondary float assem
blies with hinge pins.
8 Perform float adjustment as outlined in Notes
3a and 3b.
9, Remove float assemblies and install a new
bowl cover gasket.
10. Reinstall primary and secondary float as
semblies.
11. Install vacuum piston on metering rod
link
in horizontal position, then rotate to vertical.
12. Place pump assembly in bowl cover bore,
and turn bowl cover upright while holding pump
plunger.
13. Place bowl cover on
bowl, with pump spring
under plunger.
14. Using a pair of long-nosed pliers, install
pump link through plunger shaft and pump arm
with ends pointing away from choke housing side,
and upper end in outer hole long stroke of pump
arms. Retain link with spring clip on upper end.
f. Idle Speed-Up Control Assembly
1. Put small brass rod into vertical slot on
diaphragm rod and slide diaphragm rod into other
circular cover.
2, Drop ball in valve stem opening and place
solenoid valve into the valve stem opening. Install
gasket, solenoid switch, and spring on inside dia
meter of coil.
3. Install 2 screws and washers on solenoid hous
ing with wire connections pointing away from the 6
hole circular cover.
4, Make sure that tab on diaphragm is lined up
with mounting bracket side of circular cover. In
sert tapered coil spring with large diameter end
of spring against circular metal retainer on dia
phragm.
5. Install 6 screws
and
washers fastening the
circular covers together.
6. Install spring, round head nut, and hex-head
nut to diaphragm rod. The large diameter of the
round head nut should be against spring.
g. Bowl Cover Installation
6. Assemble
primary
and secondary needle
valves with clips to the corresponding floats.
1. Flolding bowl cover assembly as shown in