Fuel Pump; Testing - Jeep UNIVERSAL CJ-2A Service Manual

'Jeep' UNIVERSAL and 'Jeep' DISPATCHER
F
rocker arm, and rocker arm spring. Remove the
valve plate screw and separate the valve plate
retainer, valve gaskets, and valve•;.
Clean all parts in cleaning solvent and blow out
with compressed air. Valves should not be removed
from the valve housing assembly. Check all parts
to see that they have not been cracked or broken
and that screw threads have not been stripped or
cross threaded. Refer to Par. F-43 for fuel pump
testing.
F-41. Assembly
Refer to Fig. 131
Install the valve gaskets, valves, valve retainer and
secure them with the valve retainer screws. Make
sure that the inlet and outlet valves are in their
proper positions. Place the diaphragm spring re-
tainer in position on the diaphragm pull rod
and install diaphragm spring. Position the dia-
phragm assembly in pump body and attach the
cover to pump body, with file marks aligned, with
the six attaching screws. Do not draw the screws
up tight. Install rocker arm spring, rocker arm
pin washers, rocker arm and rocker arm pin. With
rocker arm positioned on the diaphragm rod, draw
iiit-----{15
the six pump body screws up evenly and securely.
Install the filter screen, cork gasket and sediment
bowl and secure them firmly with the thumb screw
on the bowl clamp.
F-42. Vacuum Pump
• Models CJ-3B, C]-5, C]-6
The double-action fuel pump resembles two single-
action pumps placed one above the other. A single
fuel pump rocker arm actuates the two separate
diaphragms. One diaphragm is part of the fuel
delivery pump and operates as described in Par.
F -39. The other diaphragm is part of the vacuum
pump and operates as described here.
As the actuating lever forces the diaphragm upward
against spring pressure, air is forced through the
outlet port into the engine's intake manifold. On
the return stroke, spring pressure forces the dia-
phragm downward, creating a partial vacuum and
opening the inlet valve. In this manner, air
;"S
pumped out of the windshield wiper motor and int-.>
the intake manifold. When the wiper motor is shut
off, manifold vacuum holds the diaphragm against
its spring so that the full motion of the actuating
lever is not accompanied by a complete up-and-
down motion of the diaphragm.
10737
FIG.
133~ACCELERATOR
LINKAGE--DJ-3A
!-Bushing
2-Nut and Lockwasher
3-Choke Control
4-Adjusting Block
5-Rod
6-Bell Crank
7-Plain Washer
8-Cotter Pin
9-Seal
10-Treadle
11-Pin
12-Hinge
13-Nut and Lockwasher
14-Screw
IS-Spring
107