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The first thing you'll need to do is identify
the area of the leak. This can give you a clue as to where
the leak might be eminating from. For this stage of the
process, you'll rely on the most basic of leak detection
tools - your ears! All you need to do is detect the area
of the 'Ray that the hiss is coming from.
A - The barrel. If the leak seems
to be coming from the barrel, you should suspect the valve
(cup) seal. Try cleaning the old seal and soak it in ATF
for an hour or so, then reassemble. If this doesn't do
it, try replacing the seal with a new one.
A - Air coming from the power
tube (bolt guide). Small urethane o-ring inside the valve
housing OR the plastic valve seal/cup seal.
B - The velocity screw. If the
leak seems to be coming from here, try putting some teflon
tape on the velocity screw. If that doesn't do it, it
could be coming from the transfer tube or the valve. Soak
the transfer tube o-rings in ATF and reassemble, or replace
them with new ones. If that doesn't do it, try the valve
seal. (See above.)
B - Air could be coming from between
the valve body and the transfer tube. Valve retaining
cap o-ring or retaining cap not screwed on tight enough
(personal experience).
B - Air could be coming from around
where the valve body and the transfer tube and hammer
tube come together. This leak will look like air is coming
from the valve body. Closer examination will reveal that
co2 is coming between the tight seal between the hammer
tube and the valve body and escaping out of the groove
in the top of the hammer tube where the valve body and
hammer tube come together.
C - The cocking slot. If the hiss
is loudest here, it could be the transfer tube or the
valve. (See above.)
C - Air leaking inside the hammer
tube, Valve seal.
D - The donkey. If it's coming
from the back of the donkey, it's probably the CO2 tank
or quick-change o-ring. Replace the o-ring with a new
one.
E - The tank valve. If it's coming
from the tank valve, it should leak whether the tank is
in the gun or not. If this is the leak, have your tank
repaired by a qualified airsmith. |
