Operating Manual
Maintenance
5/5/97
23
10.
REMOVE THE MIXING
CHAMBER- hold the gun block
in one hand,
as shown in. Insert
the mixing chamber knockout
tool into the back of the gun
block and tap it with the 4 oz.
ballpein hammer. The chamber
will eject into the palm of your
hand. Place the chamber into a
Figure 24. Mixing Chamber Removal
container of gun cleaner. Flush the entire gun block with gun cleaner.
NOTE: The gun block should
not be left open to the
atmosphere for extended
periods of time. If cleaning
and reassembly cannot be
done simultaneously, then
immerse the gun block in gun
cleaner.
11.
CLEANING REMOVED ASSEMBLIES-
NOTE: As a routine
procedure, the ball and spring
A)
CHECK VALVE
assembly should be removed
from the retainer screw on a
daily basis and the parts
thoroughly flushed.
1)
To remove the ball and spring
assembly, merely hold the ball
and carefully unscrew it by
turning it counterclockwise. If
dirt or material build-up
prevents complete removal of
the spring, screw it back in,
Figure 25. Check Valve
soak the assembly in gun cleaner and try to remove it again. If
the ball and spring assembly still resists removal, it will be
necessary to pull it out, causing it to be destroyed.
2)
Once the ball and spring assembly is removed, the inside of the
closure screw should be cleaned with the check valve cleanout
drill provided in the tool box. Insert the flattened end of the
cleanout drill parallel to the legs of the closure screw. To
prevent breaking off the spurs broached in the closure screw, do
not turn to clean the inside of the screw until the flat on the drill
has cleared the spurs. Spin the drill with your fingers to loosen
any buildup, then remove the drill and flush out the inside of the
closure screw with gun cleaner. Now check to insure there is
no damage where the ball seats. Also, the sleeve should be
checked to insure that it is not damaged and that it fits tightly
on the end of the screw. If there is damage or if the sleeve fits
loosely, it should be replaced.