OPERATION & MAINTENANCE INSTRUCTIONS

TM 9-4940-507-14&P

MODEL 15 SPRAY GUN

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