3
CONtROLLiNG tHE fLUiD
Rate of fluid output is controlled by fluid pressure either
from a pressure tank or a fluid handling pump. It can also
be controlled at the gun by the fluid valve control screw
(13). This, however, is advisable only when a momentary
change of fluid is needed.
REPLaCiNG tHE fLUiD NEEDLE PaCKiNG
1. Remove air and fluid nozzles from gun.
2. Loosen set screw (19) in needle collar (20).
3. Remove fluid needle (7 or 29).
4. Unscrew fluid packing nut (22) and take out old
packing (21).
5. Place a few drops of oil (42) on new packing and insert
it into gun in place of old packing.
6. Screw on fluid packing nut, but do not tighten.
7. Replace fluid needle, fluid and air nozzles.
8. Tighten packing nut until needle movement is restricted,
then loosen approximately 1/2 to 3/4 turn.
faULtY SPRaY
Faulty spray is caused by dry residue of the fluid material
accumulated around the fluid nozzle tip or inside the air
nozzle. Soak these parts in a solvent that will soften the
dry residue, then remove it with a brush or cloth.
If either the air or fluid nozzle is damaged so as to give
faulty spray, it must be replaced.
aiR LEaKiNG tHROUGH tHE GUN
This is caused by a worn air valve stem (9) or dirt on the
air valve seat (8). Air leaks around the valve stem of the
gun can be stopped by replacing the packing (28). To clean
the seat, remove the trigger (3) and the air valve body (8).
CLEaNiNG tHE GUN
Shut off the air supply to the pressure tank and release its
pressure. Loosen air nozzle. Hold a piece of wadded cot-
ton or rag over the gun nozzle and pull the trigger. The
air will back up through the fluid nozzle and force fluid
out the hose into the tank. Replace the paint in the pres-
sure tank with clean solvent and spray it through the gun
until the gun is clean. Dry out the residual solvent in the
fluid hose by blowing air through it.
fLUiD NOzzLE & NEEDLE aSSEMBLY
iNStRUCtiONS
Caution
NEvER use metal probes to clean the air or fluid nozzle
because they can scratch and burr the precision machined
surfaces and cause faulty spray.
!
Nozzle Selection Chart (7D)
fluid x air
air flow Required
Maximum Pattern
Shape of
Nozzle Combination
at 50 PSi (CfM)
(Width at 8")
Spray
Needle
+68ss x 101
6.75
13"
Fan
54-1209
*57ss x r-27
9
8"
Fan
54-1209
*58ss x r-30
12.2
8"
Fan
54-1209
59ass x 244
11.5
11"
Fan
47-345
59bss x 250
11
—
round
47-345
59bss x 252
11.5
7"
Fan
47-345
59Css x 262
11
7"
Fan
47-345
*requires 54-1224 retainer ring. 200 series air nozzles requires 54-2065 retainer ring.
+
requires 54-1583 base and 54-1584 ring.
fluid Nozzle Orifice Sizes
68ss 57ss 58ss 59ass 59bss 59Css
.110 .218 .281 .171 .218 .281
This spray gun uses a very wide variety of standard nozzles. Its function is to spray medium to heavy coatings with up
to 1 mm aggregate coatings.
typical
fluid & air
Spray
Material
Nozzle
type Pattern CfM PSi
block filler
57ss X r27ss
Pi
8
9.0
50
light texture
58ss X r27ss
Pi
8
12.0 50
Heavy texture
68ss X 206
Pi
15
9.8
50
