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10-20
bush from the top of the pump cyl-
inder.
5. Remove the pump piston from
cylinder, remove spring clip from
pump stem and separate pump piston,
pump rod, spring, bush and gasket.
Discard the gasket.
6. Insert the new pump piston in
its cylinder taking care not to crease
or fold the leather. A circular twist-
ing motion applied to the leather
assists in this operation as does a
drop of Ught lubricating oil. Place
the pump spring in position over the
pump stem and press in the split
spring retaining bush tlush with the
surface of the main body.
7. Place a new gasket on the main
body then fit the pump rod and
spring clip.
8. Replace the air horn in posi-
tion on the main body. Holding the
reinforcing bar in position, install and
GROUP 10-
FUEL
SYSTEM
tighten
air horn
retaining screws.
Note that
the
two longer screws are
used
to
retain the reinforcing bar.
9.
Replace
tne choke link and in-
stall
the retaining clip.
10. Perform a vent
valve
adjust-
ment as outlined
in this section.
11. Install the air cleaner assembly
VENT VALVE
REPLACEMENT
STROMBERG BV
-2
I.
Remove the air cleaner assembly.
2.
Withdraw
choke
link-retaining
clip and remove choke link.
3.
Remove the air horn to main
body retaining screw's and the rein-
forcing bar. The air horn can now
be separated from the main body.
4.
Loosen the vent valve locknut
and remove
from
the
valve stem. This
will allow ·the
valve stem and valve
spring
to be withdrawn from the under-
neath
side of the air horn.
5.
Locate
the vent valve spring on
the
spigot provided on the underside
of the
air
horn
and place the vent
valve stem in position. Install vent
valve
locknut.
6.
Replace
the air horn in position
on the main
body. Holding the re-
inforcing bar in position, install and
tighten
air
horn
retaining
screws.
Note
that two longer screws are used
to
retain
the reinforcing bar.
7.
Replace
the choke link and m-
stall the
retaining
clip.
8.
Perform
a vent valve adjustment
as outlined in
this section.
9.
Install
the air cleaner assembly
EJ
REMOVAL, MAJOR REPAIR OPERATIONSAND
INSTALLATION
REMOVAL
Flooding,
stumble
on
acceleration
and
other performance complaints
are,
in many instances,
caused
by the
presence
of dirt,
water
or
other foreign
matter in the carburettor.
To aid in
diagnosing the
cause
of complaint,
the carburettor should
be
carefully
removed
from
the
engine
without
removing
the
fuel
from
the
bowl.
The
contents of
the
bowl
may then
be
examined
for
contaminatiOn
as
the
carburettor
is disassembled.
1. Remove the air cleaner. (pagel<r67).
2.
Loosen
the choke outer
cable
clamp
screw and the inner
cable
tocking
screw. Remove the cable.
3.
Hold the
carburettor
fuel line
umon and undo and remove the fuel line.
4.
Remove
the
spring
clip
and
washer from the throttle control l'od.
Remove
the throttle control
rod from
the carburet tor
bracket.
5.
Remove the distributor vacuum•
line.
6.
Remove the two flange retaining
nuts and lock washers
and
remove the
carburettor. Remove the
gaskets
from
the
intake
manifold 11.nd discard.
DISASSEMBLY
Use
a separate container
for the
component
parts
of
the
various
as-
semblies
to
facilitate
cleaning,
in-
spection and assembly.
The
following
is
a
step-by-step
sequence of operations for completely
overhauling the carburettor, however,
certain components of the carburettor
may be serviced without a complete
disassembly of the entire unit.
A disassembled view of the
car-
burettor is shown in Fig. 12
AIR HORN AND MAIN BODY
I.
Withdraw
choke-link-retaining
clip and remove choke link.
2.
Remove the air horn to main
body retaining screws and reinforcing
bar. The air horn can now be
separated
from the main body.
MAIN BODY AND THROTTLE
BODY
1.
Remove choke outer cable
clamp
screw
and cable clamp.
Disconnect
throttle return spring from lever on
throttle
shaft.
2.
Remove the main body to throttle
body retaining screws.
3.
Separate the main body assembly,
the gasket and
the
throttle body.
Discard the gasket.
AIR HORN
I.
With the special tool unscrew
the power piston assembly and re-
move it from its cylinder.
2.
Remove the vent
valve
locknut.
This will allow the valve stem and valve
spring to be withdrawn from the under-
neath
side of the air horn.
3.
Withdraw air
cleaner
bail pin from
its
locating holes
and remove bail from
air horn.
4.
If
it is necessary to remove the
choke
valve
and shaft, lightly
scribe
the
choke
valve along the choke shaft
so
that the choke valve can be in-
stalled in the same position during
installation.
Remove
the choke valve retaining
screws. The retaining
screws are staked
in the choke shaft. If the tips of the
screws are flared excessively, file off the
flared portion
to avoid damage to the
threads in the choke shaft.
Be
careful not to damage the choke
shaft or valve while filing the screws.
Remove
the choke valve from the top
of
the
air horn. Slide the choke shaft
and
lever
from the air horn and separate
shaft,
lever and
spring.
MAIN BODY
I.
Withdraw
screws
and
remove
choke control bracket assembly.
2. Place a
small lever such
as a
~crew
driver under
the
horizontal
arm
of the pump
rod
and levering
up-
wards remove
the split spring retain-
ing bush from
the top of the
pump
cylinder.
3. Remove
the
pump piston
from
cylinder,
remove spring clip from
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