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5. Remove fuel pump cover screw (26), gasket
(25), cover (24), gasket (23) and screen.
6. Remove screws attaching fuel section to center
section and remove fuel section, diaphragm
(19), valves (21) and (22).
ASSEMBLY
1. Assemble link spacer (15) over fuel link (11).
Place one vacuum link (11) and (12) on each
side of the fuel link. The hook ends of the
vacuum link should come together so that they
surround the fuel link. All link hooks should
point in the same direction. Place assembly of
links and spacer between lobes of rocker arm
with one spacer washer on the outer side of
each vacuum link. Slide rocker arm bushing
(14) through holes in rocker arm spacer wash-
ers and links. Retain the parts in position by
using AC Tool PT-6 or a long straight 3/16" pin.
2. Place diaphragm spring in position and assemble
pull rod and diaphragm assembly (19) through boss
in fuel body, hooking pull rod over end of link.
3. Drive out tool PT-6 with a new rocker arm pin
(10). Place washer over small end of new pin
and spread pin end with a round nose punch.
4. Place valve and cage gaskets in recesses on fuel
cover. Inlet valve must have three legged spider
facing out of cover, outlet valve must have
three-legged spider facing into cover. Install
retainer and screw.
5. Install strainer screen, bowl gasket (23), bowl
(24), bowl screw gasket (25) and bowl screw
(26). Install air dome (20).
6. In stall fuel cover on body, making sure that file
marks on cover and body line up. Push on
rocker arm until diaphragm is flat across body
flange. Install cover screws and lockwashers
loosely until screws just engage lockwashers.
Pump the rocker arm three or four full strokes
and tighten cover screws alternately until se-
cure. Diaphragm must be flexed before tight-
ening cover screws, or pump will deliver too
much pressure.
7. Place two gaskets and two valves and cage
assemblies (17) and (5) in cover. Secure valve
and cages with retainer and screw.
FUEL SYSTEM & EXHAUST 50
8. Turn cover over and set screen in recess over
valve hole. Set screen retainer on screen. Place
cover gasket (3), cover (2), cover screw gasket
and cover screw (1) in position and tighten
cover screw.
9. Assemble oil seal on vacuum diaphragm pull rod
in the following sequence: oil seal spring, upper
retainer, oil seal washer, and lower retainer. Turn
lower retainer 90 degrees to lock in position.
10. Lift the pump body above eye level, facing the
vacuum diaphragm flange. The two vacuum
links will swing down so that the diaphragm
pull rod can be hooked to both links.
11. While holding vacuum diaphragm in position,
the body should be clamped in a vise, v a c u u
m side up. Clamp by one of the mounting flange
ears. The vacuum diaphragm must be held
leve1 with body flange during the following
operations by inserting a 3/32" piece of metal
between rocker arm stop and body. This spacer
can be made from a piece of steel, 3/16" to 3/32"
by 8 inches. Bend one end to form a right angle
hook, 3/8" from bend to end. (This tool is avail-
able from your AC jobber as tool PT-8).
12. Place spring retainer on riveted end of diaphragm
pull rod, and place spring on the retainer. Place
vacuum cover and valve assembly over spring and
align the file marks.
13. Insert the two No. 10-32 x 1-1/2" screws in oppo-
site holes in cover flange. Turn these long screws
down as far as they will go without forcing,
alternating a few turns on each. Insert regular
screws with lock washers and tighten until screws
just engage lockwashers. Place two long screws
with regular screws and lockwashers.
14. Remove 3/32" spacer from rocker arm posi-
tion. This allows the heavy vacuum spring to
push diaphragm into a flexed position. Tighten
all cover screws alternately until secure.
15. Combination fuel and vacuum pump cannot be
bench tested because of the heavy vacuum
spring. Use a vacuum gauge and test pump
while pump is assembled to engine.
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