18
VMAR CHALLENGER 40ARF TRAINER
TM
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STEP 4.2 - INSTALLING THE FUEL
TANK.
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4.2.1
Before installing the fuel tank into your Chal-
lenger, please note that:
- One of the pre-bent metal tubes will supply fuel to the
engine and allow you to fill the tank up. We call this the
"Fuel Line".
- The other pre-bent metal tube will be connected to the
muffler of your engine and serves to bring engine pres-
sure into the tank to help force fuel out the fuel line into
the engine. We call this line that is normally connected to
your muffler the "Pressure Line". It also serves as a fuel
overflow vent when topping the tank up with fuel.
See the following depiction that illustrates the location and
orientation of the fuel and pressure lines.
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PHASE 4 - THE FUEL TANK &
RECEIVER BATTERY PACK.
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STEP 4.1 - ASSEMBLING THE FUEL
TANK.
The fuel tank is shipped in the Master Parts Bag. The
pre-bent metal fuel outlet tubing, fuel stopper, cinch
bolt and plastic retaining disks have been pre-assem-
bled and inserted into the neck of the tank. The fuel
clunk has also been placed into the tank.
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4.1.2
Remove the stopper assembly from the tank and
extract the clunk.
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4.1.3
Using the 100 mm (4 in.) and the 50 mm (2 in.)
pieces of tubing and the stopper assembly, assemble the
tubing, stopper assembly and clunk as shown below. Note
that the 100 mm (4 in.) piece of fuel tubing is applied to
the straight end of one of the metal tubes and the clunk is
inserted into the other end of the medium fuel tubing.
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4.1.1
To assemble the fuel tank you will need the
following items included with the kit:
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4.1.5
Push the stopper firmly into the neck of the tank
until the shoulder of the black stopper contacts the neck
of the tank.
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4.1.6
Ensure that the
external metal tubes are
pointing upwards as
depicted here and then
tighten the cinch bolt in
the centre of the stopper
until the external plastic
disk begins to dimple
inwards.
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4.1.7
Attach a loose
piece of tubing to each of the external metal tubes. Pinch
one closed while blowing into the other. You should see
the tank bulge slightly under pressure. Listen for air
escaping while you continue to blow and keep the tank
pressurized. If you hear any air leaking from around the
stopper, back off the cinch bolt slightly, rotate the stopper
slightly to and fro and then re-tighten the cinch bolt
slightly more securely. Test with air pressure again.
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4.1.8
Hold the tank with the stopper end pointing
upwards. Back light the tank assembly with a strong light
from behind. You should see a ghost like image of the
tubing and the clunk. Ensure the tubing has stayed
oriented as per the cutaway depiction of step 4.1.4 and
that the clunk swings freely to and fro when you move the
tank from side to side. While holding the tank vertically
with the stopper end upwards, the clunk should be ap-
proximately 10 mm (3/8 in.) from the end of the tank
opposite the stopper.
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The fuel tank
[FT]
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The pre-assembled stopper and pre-bent metal
fuel tubing assembly shipped inserted in the tank.
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Clunk (shipped inside the tank)
You will also need the following items not included with the
kit:
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100 mm (4 in.) of medium fuel tubing suitable for
your fuel type
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50 mm (2 in.) of medium fuel tubing suitable for
your fuel type. If possible select a different colour
for this piece
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Phillips screw driver
CLUNK
MEDIUM FUEL
TUBING
STOPPER & PRE-BENT METAL FUEL
TUBING ASSEMBLY
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4.1.4
Insert the clunk and tubing assembly into the fuel
tank such that the external pre-bent metal tubes are both
pointing up and the tubing inside is oriented as illustrated
in the cutaway depiction shown below.
