should be taken when starting threads. Applied
vide you with years of durability and efficiency
These working parts require periodic replacement:
1.Air cap (7).
2.Fluid tip (6).
3.Needle, fluid (41).
Removing Fluid Tip
To remove fluid tip (6) for cleaning or replacement, remove the ring nut (8) and air cap (71, turn off the atomizing air, trigger the gun to release needle pressure on the tip. Remove the tip with a wrench. Replace with the needle triggered to the rear.
When replacing air cap (7) on the gun, be sure the wire electrode coming from the needle (41) is centered in the
air cap center hole. The best method is to slide the air cap onto fluid housing (51, making sure that the wire
goes through center hole of air cap, then tighten ring nut (8), onto barrel (42) allowing air cap to be drawn up evenly on the fluid tip. Check alignment of ionizing wire in the fluid stream.
Removing Fluid Tip Housing
If the housing (5) is removed, the
NOTE: Fluid tip (6) must be removed from housing before replacing to avoid damage to ionizing wire.
Replacing Fluid Needle
Turn off the atomizing air and fluid, trigger the gun to release needle pressure on the tip. Remove ring nut (8) and air cap (7). Remove fluid tip (6) with a 7/16 in. wrench. Remove nut (19) and screw (31) from the rear of the gun. With a long nose pliers pull out needle ex- tension (46), nut (291, nut (301, spring (331, and needle (41). Unscrew needle (41) from extension (46). (Pliers maybe necessary as Loctite is used on threads.) Install new needle (411, applying Locrite no. 290 or equivalent to threads to prevent needle from coming loose during operation. Reassemble needle into back of gun using extreme care. Ionizing wire must remain straight as it passes through rear actuator packings (18).
After needle is assembled in the gun, replace fluid tip (6) and rear spring (33) and spring (341, along with ad- justing screw (311, locknut (19) and air cap (7). For ad- justment see Replacing Fluid Needle Extension.
Replacing Needle Guide
Needle guide (47) is pressed into rear of fluid housing
(5). Remove fluid housing and press out needle guide. When replacing be sure internal chamfered end faces rear of fluid housing.
Replacing Fluid Needle Extension
Remove needle (see Replacing Fluid Needle). When replacing extension (46); locknut (29) and needle ad- justing nut (30) must be readjusted on needle extension. Push needle (41), needle extension (46) and piston (38) fully forward, and turn the adjusting nut (30) all the way into the piston. Remove needle assembly from piston, turn adjusting nut two turns counterclockwise, and tighten locknut (29). This adjustment provides atom izing air just before the fluid needle is engaged and after seating.
Replacing Fluid Packing
The fluid packing (23) is replaced when the needle (41) is removed. Remove the packing nut (22) then pick out the packing and replace. Replace the packing nut. In- sert the fluid needle, tighten the packing nut and apply pressure on the packing to a firm seating. Do not over- tighten. The fluid needle should move without binding. When the gun is completely assembled and fluid pressure applied, the packing nut may be tightened to correct a slight leak.
Removing Gun Barrel
It is seldom necessary to remove the gun barrel (42) from the gun body (37). When necessary, this is ac- complished by unscrewing the gun coupling (8) and carefully lifting away from the gun body. Inspect
Replacing Cylinder Adapter
The cylinder adapter (43) should not be removed unless damaged.
Replacing Electrode Stem of Fluid Needle
If electrode stem (48) of fluid needle (41) needs replace- ment, first unscrew electrode stem from fluid needle ex- tension (46). Unscrew setscrew, and remove old elec- trode stem.
Insert new electrode stem and replace setscrew. Reassemble fluid needle (41) to fluid needle extension Ma
