Aircraft Service Manual
Jabiru Aircraft
Pty Ltd
JTM001-1
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
REVISION
1
Dated: Nov 2011
Issued By: SW
Page: 185 of 233
To check the breather line for the header tank:
-
Where equipped, turn off taps between the wing tanks and the header tank. Alternately fuel line
clamps may be used.
-
Disconnect the fuel line from the mechanical fuel pump on the engine.
-
Allow fuel to flow from the line for approximately a minute WITHOUT turning the electric boost
pump on. If the fuel flows freely the breather connection between the header tank and the main
tanks is clear. Note that the fuel hose outlet must be positioned at carburetor height during this
test.
-
Correct any blockage & reassemble.
To check the operation of the filler cap fuel vent check valve (where equipped):
-
Remove the cap and shake it. The ball inside should move freely, producing a rattling sound.
-
An alternative method which may be used is to fill the wing tanks with fuel, then shake the aircraft
by pushing up and down on the wingtip. While small droplet leakage is normal, fuel must not
squirt out of the vent.
-
Check for air flow through the valve; at low flow rates air should pass freely out the valve, at
higher rates outflow is restricted. Air must be able to pass freely into the tank at all flow rates.
-
If a fault is detected, disassemble the vent and replace any defective parts.
Figure 163
– Vented Fuel Cap Assy
14.5 FUEL SHUT-OFF VALVE
14.5.1 DESCRIPTION
The fuel shut-off valve is a two-position ON
– OFF valve. This valve is normally located in front of
the main longitudinal beam between the crew seats.
