Hangar 9 EDGE 540, Instruction Manual

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Step 5. Locate the piece of silicone fuel tubing and metal clunk.
This tubing will be attached to the clunk making up the fuel
pickup inside the tank. Insert the metal clunk into one end of the
fuel tubing.
Step 6. Install the open end of the fuel tubing onto the fuel
pickup tube.
Step 7. Insert the 3 mm screw into the raised portion of the
large plastic cap. Place the 3mm nut into the raised slots on the
small plastic cap. Compress the caps/stopper together and
screw the 3 mm screw into the nut. Tighten just enough to hold
the assembly together.
Step 8. Carefully insert the stopper into the fuel tank. Position
the stopper so the vent tube is pointing to the top of the fuel tank.
The vent tube must point to the top of the tank for the fuel system
to function properly. Also, move the tank around and up and
down to observe the movement of the clunk. It should move
freely, and not hit the back of the fuel tank. The fuel clunk must
be free to move, regardless of what attitude the aircraft takes,
thus ensuring it is in the fuel at all times. If the clunk does not
move freely, trim a portion of the fuel tubing to shorten the
length and try again.
Step 9. When you are satisfied with the movement of the clunk,
and the vent tube is properly positioned to point to the top of the
tank, tighten the 3 mm screw so the caps move toward each
other and compress the rubber stopper in the tank stopper
opening. This compression will help seal the stopper into the
tank opening.
Important: You should mark which tube is the vent and which is
the fuel pickup when you attach fuel tubing to the tubes in the
stopper. Once the tank is installed inside the fuselage, it may be
difficult to determine which is which.
Step 10. Wrap the fuel tank in foam. This is done to provide
support for the fuel tank, and help reduce vibration. Attach fuel
tubing the tank tubes and feed the tubing through the hole in the
firewall as you slide the fuel tank into the area behind the firewall
in the fuselage. You will note two “C” shaped slots in the
plywood floor behind the firewall. Rubber bands are slipped into
these “C” shaped slots around the fuel tank, thus holding it
firmly in place.
Note: Remove the fuel tank when drilling the hole for the
throttle linkage to prevent accidental puncturing of the
fuel tank.
Section 13: Assembling and Installing
the Fuel Tank
CONTINUED
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