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PART 10-6-
Fuel Pump and Filter
10-65
EJ
MAJOR REPAIR OPERATIONS
AC FUEL PUMP-
6-CYLINDER ENGINES
DISASSEMBLY
The fuel pump assembly is shown
in Fig. 1.
1.
Scribe a line on the flanges of
the pump body and valve housing to
identify their original position.
2.
Remove the valve housing from
the fuel pump body.
3. Remove the staking marks from
around the valves, remove both
valves from t)le valve housing. Care-
fuDy note the position of the valves
in the valve housing cover so that
new valves can be correctly instaUed.
f.
Using a blunt punch, drive the
rocker arm pin out of the pump
body
(Fig. 4)
.
5.
Press the pump diaphragm into
the fuel pump body and pull the
rocker arm outward to unhook the
diaphragm actuating rod from the
rocker arm and link assembly (Fig.
5).
6. Remove the diaphragm and dia-
phragm return spring, rocker arm
and link assembly, and the rocker
arm return spring from the pump
body.
7. Remove the diaphragm
actua~
ing rod oil seal retainer and the oil
seal from the pump body (Fig.
1).
Tool- T
56L-9 350-A
Detoil 3
ROCKER ARM PIN
FIG. 4-Rocker
Arm
Pin
Remowal
CLEANING AND INSPECI10N
Refer to Pageto-nfor the cleaning
and inspection procedures.
FIG. 5-fuel Pump Diaplwagm
Remowal
ASSEMBLY
1.
Immerse the new oil seal in
clean engine oil for 2 minutes prior
to installation. Install the diaphragm
actuating rod oil seal and retainer so
that the seal protrudes towards the
diaphragm mounting flange (Fig.
1).
2. Seat the oil seal retainer.
3. Install the valves in the valve
body so that the valve positions are
as shown in Fig.
1.
4. Seat the valves firmly in the
valve body. Stake the valves in
place.
5. Lubricate the diaphragm actu-
ating rod.
6. Position the fuel pump dia-
phragm and spring assembly into the
pump body.
7. Hold the diaphragm as!lembly
in the pump body; position the pump
body so that the mounting flange
faces up. Apply slightly more pres-
sure to the lower edge of the dia-
phragm, and insert the rocker arm
link assembly with the cam shoe
facing away from the diaphragm.
Hook the rocker arm link to the
diaphragm actuating rod.
8. Lift one edge of the diaphragm
and observe the positioning of the
oil seal.
If the oil seal is not properly posi-
tioned, push the diaphragm into the
pump body as far as possible with a
slight twisting motion to the dia-
phragm. This wilf as ;ist the oil seal to
position itself propt rly on the dia-
phragm rod. Do not twist the dia-
phragm too severely or the rod may
be unhooked from the link.
9. Install the rocker arm return
spring and hold it in place by cock-
ing the rocker arm slightly.
10. Install the rocker arm pin in
the pump body.
11. · Position the valve body and
pump body so that the previously
scribed marks are aligned.
ll. Install all the screws and the
lockwashers until the screws just en-
gage the fuel pump body. Make sure
that all of the screws pass through
the holes in the diaphragm without
tearing the fabric.
FIG. 6-Valve Arrange-
ment A. C. Fuel Pump
13. Alternately and evenly tighten
all of the screws.
14. Cover all but one vent hole
in the pump lower body, using mask-
ing tape or a similar material.
15. Using
a
suitable
vacuum
source, apply 15 inches of vacuum
(Hg) to the underside of the pump
diaphragm at the open vent hole.
Use a suitable rubber tipped probe
or hose to assure proper sealing at
the vent bole. Apply vacuum to the
diaphragm 2 times for a minimum
of one minute each time. This will
position the oil seal properly on the
diaphragm rod. Remove the sealing
tape from the vents.
FIG. 7 -Rocker Arm Pin Seal
Plug Removal
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