Van's Aircraft RV-12, Maintenance Manual

Page: 157 / 217

Rev.5
13-5
FIRST SIPHONING OUT AS MUCH AS POSSIBLE
. A
SMALL WEIGHT SECURELY ATTACHED TO
THE END OF A FLEXIBLE SIPHON HOSE WORKS WELL FOR REACHING THE TANK
'
S BOTTOM
FORWARD END
.
1. Put the fuel valve in the ‘OFF’ position.
2. Remove the engine cowling. (12-4)
3. Place a container beneath the gascolator with sufficient capacity for the fuel in
the fuel tank.
•
NOTE: P
OSITION A RAG UNDER THE GASCOLATOR FITTING TO CATCH SPILLED FUEL
.
I
MMEDIATELY AFTER DISCONNECTING THE HOSE MOVE IT UPWARD AND POSITION THE END AS HIGH
AS POSSIBLE TO MINIMIZE THE LOSS OF FUEL FROM THE HOSE
.
4. Disconnect the fuel hose from the 90° fitting on the output side of the gascolator.
5. Temporarily connect a length of 1/2” ID hose to the 90° fitting. Place the loose
end in the fuel container.
6. Put the fuel valve in the ‘open’ position.
7. Remove the fuel cap from the fuel neck.
■ CAUTION: T
URN OFF THE ELECTRIC FUEL PUMP IMMEDIATELY WHEN A CHANGE IN
SOUND IS HEARD
, (
THE LOUDER CLACKING SOUND INDICATES THE FUEL PUMP IS NO
LONGER PUMPING FUEL
) DO NOT ALLOW THE FUEL PUMP TO OPERATE
WITHOUT FUEL OR PERMANENT DAMAGE MAY OCCUR.
8. Turn on the master switch and operate the ES 40105 Electric Fuel Pump until the
fuel pump stops pumping fuel.
9. Put the fuel cap back in place in the fuel filler opening but do not latch it. Just
allow the cap to lay in the opening. To aid in clearing the fuel lines use low
pressure (5-10 PSI max) air applied to the open end of the fuel hose that was
disconnected from the gascolator's outlet fitting.
Repeat the previous two steps several times, waiting for about 30 seconds
between repitions to give the fuel time to flow past the tank's internal baffle.
Also, the fuel valve may be partially closed, reducing the flow rate to equal or
slightly less than the tank drainage rate (for fuel behind the internal baffle),
helping to reduce the number of 'run - wait' cycles.
10. Reconnect the fuel line at the gascolator.
F
UEL TANK REMOVAL
Tools 5/16, 3/8, 7/16 socket
11/16, 9/16 combo wrench