TM 9-4940-507-14&P
MODEL 15 SPRAY GUN
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OPERATION & MAINTENANCE INSTRUCTIONS
cleaning or dried material around the fluid nozzle tip or in
the air nozzle. Soak these parts in a solvent that will
The Model 15 Gun is normally used for touchup,
soften the dried material and remove with a brush or
stenciling, and small works. The design of the gun
cloth.
makes it easier to control the spray for small works.
CAUTION
CONTROLLING THE FAN SPRAY: The fan spray for an
Never use metal instruments to clean
external mix nozzle set-up is easily controlled by means
of the Side Port Control 55-828 Turning the Stem 55-830
the air or fluid nozzles. These parts
to the right, or clockwise, until it is closed will give a
are carefully machined and any
round spray; turning it to the left, or counterclockwise, will
damage to them will cause a faulty
widen the spray into a fan shape of any width desired.
spray. If either the air nozzle or fluid
The direction of the fan spray, either horizontal or
nozzle is damaged, the part mast be
vertical, is obtained by tuning the air nozzle to the
replaced before a perfect spray can
desired position, then tightening the retainer ring.
be obtained.
CONTROLLING THE FLUID: If a fluid pressure tank is
TO REPLACE FLUID PACKING: Remove the Fluid
used, the amount of fluid can be controlled by regulating
Control Screw 55-875, Spring 55-881 and needle. Then
the pressure on the tank. The amount of fluid can also
remove the Fluid Packing Nut 55-814 and take out the
be controlled by means of the Fluid Control Screw 55-
old packing with a small stiff wire. Replace with new
875. Turning this screw to the right, or clockwise
Packing 515-832 oiled lightly and reassemble in reverse
reduces the amount of fluid; to the left, or
order. Do not tighten fluid packing nut too much so the
counterclockwise increases the amount of fluid.
needle will go through.
FAULTY SPRAY: A faulty spray is caused by improper
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