1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club

4 - 36 FUEL SYSTEM & EXHAUST
7. Lift vacuum diaphragm (30) out of body and remove
lower oil seal retainer (34), by turning until slot lines
up with flat of pull rod. Remove oil seal washer (32),
upper oil seal retainer, and oil seal spring (31).
8. Remove fuel diaphragm (2) by pulling straight out.
CAUTION: DO NOT TILT EXCESSIVELY OR
STAKED-IN OIL SEAL WILL BE DAMAGED.
9. Remove valve cage retainer screw (3), lift out retainer
(4), two valve and gauge assemblies (5) and two
gaskets (13).
10. Remove bowl screw (11) and gasket (10). Then remove
bowl (9), bowl gasket (8) and screen (7).
11. Remove cover plate screw (17) with gasket (18). Lift
off the cover (19), cover gasket (20), screen retainer,
(21), and screen (22).
12. Blow out all passages with compressed air.
INSPECTION:
Inspect pump parts as follows:
1. Top Cover and Pump Body - Make visual check for
cracks and breakage. Inspect for diaphragm flange warpage
by testing on a smooth flat surface. Examine all threaded
holes for stripped or crossed threads. Broken, damaged, or
severely warped castings must be replaced.
2. Valve and Cage Assemblies - Replace. Extent of wear
cannot be determined visually.
3. Strainer Screen - Replace. Inspect new screen for damage
or obstruction. Screen must fit snugly around inner edge.
4. Rocker Arm - Inspect for wear or scores at camshaft pad
and at pointof contact with link and pull rod.
5. Rocker Arm Pin and Washer - Replace bullet type pin with
head type pin and washer.
6. Link - Replace because amount of wear cannot be determined
visually.
7. Rocker Arm Spring - Replace. Spring may be weak from distortion
or corrosion.
8. Diaphragm - Always replace.
9. Gaskets and Oil Seal - Always replace gaskets and oil seal to
assure tight seals.
ASSEMBLY (AC):
1. Assemble link spacer (41) over fuel link (36). Place one vacuum
link (35 and 37) 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 (43) on the outer side of each vacuum
link. Slide rocker arm bushing (38) through holes in rocker arm,
spacer washers, and links.
2. Stand the pump body (39) on the bench, fuel flange down. Set
rocker arm spring in position with one end over cone cast into
body. Slide rocker arm and link assembly into body. Outer end
of all link hooks must point toward vacuum flange. Temporarily
retain rocker arm and link assembly with AC tool PT-6 or a
long straight pin or 1 punch.
3. Turn the pump body over so the fuel diaphragm flange is up.
Set the diaphragm spring (1) on the staked-in oil seal. Push
diaphragm pull rod through retainer (12), spring and oil seal.
Flat of pull rod must be at right angles to link. Hook diaphragm
pull rod to fuel link. FUEL LINK IS THE SHORT, CENTER
LINK. DO NOT TILT DIAPHRAGM PULL ROD
EXCESSIVELY AS THIS MAY DAMAGE THE OIL
SEAL.