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A4 - Interceptor
400 - How
do you set the tension of the tail drive belt ?
This is a very
simple task really.
thing to do is to loosen the 2 screws that hold the horizontal fin
on the boom so that the boom can slide through it a small
distance. Now pick the helicopter up and look at the left hand
side rear where the boom goes into the boom holder block. You will
see that there are 4 screw heads there. Ignore the top ones,
but loosen the lower ones a bit. You will need to hold the nut that
is on the other side of these two long metric threaded screws.
Now hold the
tail assembly and gently pull the boom backwards. You may have to
also wriggle it a little, but be gentle as the boom has a slot in it
a the front to locate it, so it cannot be wriggled very much. Pull
the boom backwards as far as it wants to go and then check the belt
tension with a longish small screwdriver. Push one side of the belt
inwards. It should go to about midway, but not far enough to touch
the other side.
the boom doesn't slide back inwards, tighten to two long bolts as
tightly as you can without stripping the nuts or bolt thread.
belt tension. I like it tight enough that if I hold the tail blades
hard and then turn the main blades clockwise, they will just allow
the belt to click over the teeth with reasonable force being used.
tail belt tension is now correct.
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