Datsun 1200 - Page 44

II Fuel
System
TO
ASSEMBLE
Assembly
is a reversal of
the
dismantling procedure
with
attention
given
to the
following
Ensure that valve assemblies are
installed
correctly
in
their
respective
seats
and that
each valve
is fitted with
a
new
gaske
t
Lubricate
the
mechanical
linkage
and the
diaphragm
stem with
engine
oil when assembling
FUEL PUMP PRESSURE
TEST
I
Disconnect the
fuel feed
pipe
at
the
carburettor
2
fit
a T
fitting
to
the fuel feed
pipe
and from one
junction
connect a
pipe
back
to
the
carburettor
3 Connect a suitable
pressure gauge
to
the
remaining
junction
of
the T
piece
4 Start and run the
engine
at
varying
speeds
observing
the
pressure
readings
on the
pressure gauge
Check
the
specifications
in the front
of
the section to
comparereconutlcnded pressures
wi th
pressure
readings
A fuel
pump
that has
a
delivery pressure
above or
below that
recommended is unserviceable
and should be
removed
and
dismantled
for
inspection
WlJl
G NUT
eo
LO IfEFlBODY
r
NOTE
Excessivelv
high
pressure
usual v
mdicati
that
an
incorrecr
diaphragm spring
has been Jitted
to he
pump
or
hat he
diaphragm
is
pulled
lOa
right
Low
pressures
could
be caused bv worn
linkage
perforated diaphragm
gummed
valves or a weak
ur broken
diaphragm spring
FUEL
PUMP CAPACITY TEST
NOTE
This test should be carried out
if
the
pump pressure
was
checked and
found
to
be
within
specifications
I Run the
engine
for
a
few
minutes to ensure
that
the carburettor float
chamber
is full of
fue
2
Stop
the
engine
and
disconnect
the fuel
pump
delivery pipe
at
the
carburettor
3 Position a
measuring
beaker under
the
pipe
and
start and
fun the
engine
at 1000
rpm
for
one
ffilnute
4 If
the
capacity
of
fuel delivered in
the
beaker is
below
that
specified
see
Specitkations
then either a
partial blockage
in the
system
may
be evident or the
pump
is unserviceable Check
the condition of the
fuel
filter and
blowout
the
fuel
lines
before
removing
the
pump
for
inspection
View of 1000 Inlet and
Exhaust Manifold
Assembly
Also
T
ypicaJ
of 1200
Dismantled View of Air Cleaner Assembly
Typical
of Both
Models
44
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