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2 OPERATION
N MÅ. 173-0 :
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CHECKING THE PETROL
PRESSURE USING APPARATUS 4005-T
-
Install apparatus 4005-T
as shown obove.
-
Disconnect reservoir
return line from the
carburettor and ut plug
A on by-pass union (1).
-
Unscrew
knurled knob B by approximately one and
a halt turns.
Stort
the engine
o
)
Check pressure
of
petrol
at nu output
Fully screw down knurled knob B
und
read
the stabilizeci pressure
on
the pressure
gauge which should
be
325
mburs
(
47
psi
)
maximum.
b
Check the proper
sealing
of
the
pump return valve
-
Stop
the engine.
There
should
be
no
sudden
drop
in
pressue
c)
Check
the
proper
sealing of the carburettor needle valve
-
Unscrew knurled
plug B and
stort
the engine. Let
it run for a few minutes.
-
Stop
the
engine. There sliould
be
no sudden drop
in
pressure.
-
Remove appartus 4005-T and
fit to carburettor the tank supply and
return pipes (after having
removed
plug
A
);
CHECKING HE PUMP
FOR LEAKS
Ciose
the pump
return pipe.
-
Blow compressed air under pressure of
800
mbar
(11.6
ps!
)
into
sution tube.
-
Immerse
pump
in
a
container filled with
dean
petrol. There should be no sign of
any
leak.
Work on
petrol
gauge sender unit
To work on
the petrol
gouge
sender unit
it is
necessary to dram
the
tank (dram plug
),
and
rernove it. It is
held
by
double strap
fixed by
nut 2
).
Tightening
of nut (2) 15
mN
(1.5 m.kg
)
(10
3/4ft.Ib).
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