FUEL SYSTEM - N.2
9.
Refit the bowl to the top cover and secure with
the centre bolt.
10.
Vent the fuel system as detailed on Page N.15.
To Renew Later Type Filter Element
1.
Thoroughly clean the exterior of the filter
assembly.
Fig. N.2.
Removing the Fuel Filter Bowl.
(Earlier Type)
3.
Thoroughly clean the filter head and base.
4.
Inspect the sealing rings and renew if damaged
in any way.
5.
Place the base squarely on the bottom of the
new filter element and offer up the element
squarely to the filter head so that the top rim of
the element locates centrally against the sealing
ring in the filter head.
6.
Hold in this position whilst the securing setscrew
is located and screwed home.
7.
Bleed the fuel system as detailed on Page N.9.
Fig. N.3.
Removing Fuel Filter Element
(Later Type)
FUEL LIFT PUMP
Testing the Pump in Position
1.
Disconnect the outlet pipe (lift pump to filter)
leaving a free outlet from the pump.
2.
Rotate the engine. There should be a well
defined spurt of fuel from the outlet port once
every two revolutions of the engine.
Pressure Testing of Fuel Lift Pump in Position
Fit a 0/10 lbf/in2 (0/0,7 kgf/cm2) - 0/70 kN/m2
pressure gauge to the outlet of the pump. Ensure that
there are no leaks at the connections between pump and
gauge. Crank the engine for 10 seconds and note the
maximum pressure on the gauge. If the pressure
recorded is less than 75% of the minimum production
static pressure shown below, then rectify the pump.
Also observe the rate at which the pressure drops to half
the maximum figure obtained when cranking has
ceased. If less than 30 seconds, rectify the pump.
Min. Production
Min. Test Pressure
Static Pressure
(75% Min. Prod. Pres.)
Ibf/in2
kgf/cm2
kN/m2
Ibf/in2
kgf/cm2
kN/m2
4 bolt type
6
0,42
41
4.5
0,31
31
2 bolt type
2.75
0,19
19
2
0,14
14
To Clean the Pump Chamber
1.
Remove the fuel lift pump cover and pulsator
diaphragm by unscrewing and removing the
cover screw (see Fig. N.4).
