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49 FUEL SYSTEM & EXHAUST
VACUUM BOOSTER TEST
To check the action of the vacuum portion of
the combination fuel and ;vacuum pump, connect
a vacuum gauge to the inlet port and disconnect
outlet. Gauge should show 8-1/2" of mercury at
120 R.P.M. and 12" at 1800 R.P.M. If vacuum is
not within these limits, repair or replace pump.
REMOVAL
1. Disconnect fuel lines from pump. On combination
pump disconnect vacuum lines also.
2. Remove cap screws, fuel pump and gasket pack.
FUEL PUMP DISASSEMBLY (CARTER)
1. Mark pump body and valve housing with a file
to insure correct reassembly.
2. Remove cam lever return spring (E), Figure 13,
cam lever pin rivet plug (B), retainer (C), and
pin (D), and cam lever (A).
3. Remove six valve housing screws (F),
valve housing (I), the two valve housing
cover attaching
screws, valve housing
cover (0), outlet air dome diaphragm (P),
and strainer (M).
4. Remove diaphragm assembly (H).
NOTE: Do not remove valve cage assemblies
(I) and (N) unless they are to be replaced.
5. Clean all parts in gasoline. (Do not use a strong
solvent or cleaner on valve housing.)
6. Inspect parts for wear.
FUEL PUMP ASSEMBLY (CARTER)
1. Assemble strainer (M), outlet air dome diaphragm
(P), valve housing cover (0), and attach to valve
housing.
2. Install diaphragm assembly (H), in pump body
with flat spaces on sides towards port.
3. A1ign mark on pump body with mark on
valve housing (J) and install housing, but DO
NOT tighten screws.
4. Install cam lever (A), pin (D), pin retainer (C),
and new rivet plug (B).
5. Flex diaphragm and hold in maximum down
position and tighten valve housing attaching
screws.
6. Install cam lever return spring (E).
FIGURE 14
FUEL AND VACUUM PUMP (AC) - DISAS-
SEMBLY
1. Mark the vacuum section cover and fuel section
cover to insure parts are reassembled in their
correct position.
2. Hold pump in vise, remove 2 fuel cover screws
from opposite sides and insert 2 headless screws
No. 10-32 x 1-1/2". After guide screws are
installed remove balance of screws and vacuum
section cover.
3. Press down on rocker arm (13), Figure 14 and
unhook diaphragm link assembly (9)
inner pump arm (12).
4. File riveted end of rocker arm pin (10) flush
with steel washer or drill off end with a 3/8"
drill. Drive out rocker arm pin. Wiggle rocker
arm (13) until link (11) is unhooked from dia-
phragm shaft (19). Re move rocker arm bush-
ings, arm (13), spring (16), link (15), link (12)
and link (ii).
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