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Buick 40 Series 1948 Shop Manual page 110

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(109)
ENGINE FUEL AND EXHAUST SYSTEMS
CARTER CARBURETOR
3-35
figure
3-49.
16. Remove metering rod jets from interior
of main body
.
Do
not,
under any
circumstances,
attempt
to
remove
nozzles from main body.
17. Remove body flange and vacuum switch
assembly from main
body.
Remove body flange
gasket.
Figure 3-49-Removing Rivet Plug
18. Remove the two nozzle passage rivet
plugs from main body, using Rivet Extractor
T109-42. See figure
3-50.
Figure
3
-5 0 - 11e movl n g
Rivet
Plug
19. Hold
down on vacuum switch terminal
cap while
removing
h
'Old-down clip
.
Remo
ve
terminal cap and
switch
return
spring,
then
lift out switch guide block with contact spring
and shims. Do not lose timing shims and the
spring washer on contact spring. Turn body
flange over to allow plunger and ball to drop
into hand. See figure 3-51.
20. Using a sharp scriber, lightly scratch one
~
'
. .
.
.
SCREW
CLIP
TE
RMINA L
CAP
~
/'~
/%ETURN
SPRING
/".
,
"-
I
f")
;j,(.v
~ .
.
.
.
~
. "
"
~
GU' "
",0« W,,"
O
J
.•
. . . . .
• .
SPRING
AND SHIMS
I'
~
v:
/
"<I
·~
Ac .~
"
.
/
PLUNG ER
"'(j~
~1!~
Bt;-LL
<7
I
J
Q
Figure 3-51-Vacuum Switch Parts
line on one throttle valve and its barrel and
two lines on the other valve and barrel; also
scribe 'lines on valves along the near edge of
throttle shaft. These marks will assist in in-
stalling valves in their original
positions'
on
throttle
shaft.
After marking
valves,
remove
valves from
shaft.
21. Remove screw, washer, and arm from
end of throttle shaft. Using rawhide mallet or
equivalent, tap end of shaft through the shaft
retaining ring then remove throttle shaft and
lever assembly from body flange.
22. Remove fast idle cam and cam trip lever
from body flange. See figure
3-52.
23. Remove idle adjustment screws and
springs from body flange.
It
is not necessary
to remove the idle port rivet
plugs
unless they
are
leaking.
b. Cleaning Carburetor Parts
Regardless of the number of new parts that
are used in r
ebuilding
a carburetor, the job in
the end will not be
satisfactory
unless all metal
parts are thoroughly cleaned. Because of the na-
ture of carburetor parts, with numerous small
passages subject to fouling with tenacious car-
bon and gum deposits, ordinary cleaning proc-
esses are entirely inadequate. The
correct
pro-
cedure
is t
o
use
a
cleaning bath in which metal
parts can be im
mersed an
d
"soaked" for suffi-
cient
ti
me after disassembly to
thoroughly
clean
all
surfaces
and passages.
Bendix Carburetor Cleaning Solvent has been
developed especially for cleaning carburetors,
and is recommended for this purpose. Regard-
less of the cleaning material
used,
however, be
sure to thoroughly rinse the parts in
kerosene,
distillate, or wh
ite
gasoline to remove all

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