Cadillac 54-6219 1954 Shop Manual page 269

12-38
ENGINE FUEL AND EXHAUST
Fig. 12-52, carefully lower cover onto bowl, guid
ing vacuum piston and pump plunger into their
respective bores.
CAUTION:
Be careful not to hold bowl cover
in such a way as to press against floats.
2. Install the 6 inner bowl cover screws with
lockwashers. The seveft longest screws are in
stalled in positions indicated in Fig. 12-56, and
remaining screws in their respective places.
NOTE: Install idle speed-up control if car
is equipped with Air Conditioning. lnstallvacuum
pipe to idle speed-up control and throttle body.
3. Connect longest bent end of pump rod to pri
mary lever with spring clip, and connect upper end
of rod to pump arm with washer, spring, and
spring retainer.
4. Install upper end of
choke
rod in slotted
choke shaft lever, and retain lower end in cam
trip lever with spring clip.
5. Rotate thermostat lever counter-clockwise
from free position until coil picks up choke valve.
Continue turning until metal pointer lines up with
plastic pointer on choke housing.
6. Holding
thermostat lever in this position,
install upper end of modifier rod into lever from
inner side. Slip lower end of rod into primary
throttle shaft modifier lever and retain with spring
7. Install metering rods through looped ends of
metering
rod
spring and holes in bowl cover. In
sert rods through metering jets and honk
onto
metering rod carrier at the ends of the "T"
8. Check to see that metering rod assembly is
free to slide up and down against pressure of
vacuum piston spring.
9. Check adjustments as required. If disassembly
of bowl cover or throttle body has been performed,
then adjustments outlined in Notes 3c through 3k
will be necessary. If no disassembly has been per
formed, and if carburetor was adjusted correctly
before removal of the bowl cover, then further ad
justments may be omitted.
NOTE: It is therefore possthle to remove the
bowl cover assembly for float adjustment or
other routine service without removing the car
buretor from the engine. If levers on choke or
pump shafts are loosened, however, the full ad
justment procedure on the bench and on the en
gine must be performed.
10. Install dust cover and gasket with 2 screws
and lockwashers.
11. Install air cleaner gasket, mounting stud
and air cleaner, if carburetor has been left on
engine. Otherwise, Install and adjust carburetor
as described in Notes 6 and 9.
16
Fuel Pump Tests
1. To check the fuel pump capacity, disconnect
gasoline line from filter to carburetor at fuel
filter outlet, swing fuel line out of the way, and
remove filter from pump.
2. Attach a one
foot piece of 5/16" tubing to
pump outlet. The pump should fill 1/2 pint bottle
with fuel in 9 strokes fuel spurts at cranking
speed. 26 cc
per
stroke minimum. If 1/2 pint of
fuel is delivered as specified, the pump is normal
and gas line and tank are not obstructed. If no
gas flows, or if only a little gas flows, check for
the following:
a. Strainer nut on pump loose. Tighten nut.
b. Fuel line connections loose or cracked. Tigh
ten or replace fuel line fitting,
c. Fuel line clogged. Blow out with compressed
air.
d. Diaphragm flange screws loose. Tighten flange
screws.
e. Flexible inlet line pinched, broken or porous.
Replace flexible line.
f. Fuel pump push rod worn too short 7.1425 to
7.1475 inches long. If rod is worn excessively,
check eccentric for wear by measuring rod stroke
.245 to .250 inch,
3. If pump does not operate properly after above
corrections have been made, replace pump.
17 Fuel Pump Removal
1.
Disconnect flexible
fuel line at end near
front motor mount, and remove line from clips.
2. Disconnect flexible fuel line at fuel pump.
3.
Remove fuel line between fuel filter and
carburetor.
4. Remove two screws and flat washers holding
fuel pump to oil filler housing, and remove pump
with gasket and fuel filter.
5. Remove and discard pump mounting gasket.
6. Remove fuel filter from pump.