Ransburg Evolver Solvent Applicator 79190-XXXXXXXX - Manual (Page 32)

27
Evolver Solventborne Robotic Atomizers - Maintenance
Figure 7: Polar and Non-Polar Solvents
8. Remove fluid nozzle [32] by unscrewing counter-
clockwise. Inspect o-ring [30] and all passages for
build up or damage. Clean or replace as necessary.
Lubricate and reinsert o- ring into gun barrel
and reinstall fluid nozzle. Torque fluid nozzle to 25
lbs•in (2.82 Nm).
> There should be a small gap between
the fluid nozzle and the gun barrel after
tightening.
NOTE
9. After cleaning, insert the electrode assembly
[31] back into the spray head assembly. Apply
Loctite #222, low strength (purple) thread-locker, to
the threads of the electrode assembly before reas-
sembly.
10. Screw fluid tip [34] back into place. Hand tighten
first, then with a small wrench, tighten an additional
30 degrees.
11. Replace air cap locator [33], air cap [35], and
air cap retainer [36].
12. Apply a thin film of petroleum jelly to valve
and
needle springs [2] and [3]. Install the springs back
into the end cap and the spray head assembly.
13. Screw end cap [1] back on.
Current Output Test
1. Clean and blow out all fluid passages with non-
conductive solvent.
2. Remove from robot and perform bench test using
a spare tubing bundle.
3. Turn the control unit power ON.
4. Activate high voltage and slowly approach the
gun electrode with ground hook or wire.
5. Monitor the current output on the MicroPak.
Current should rise as ground approaches. At approxi-
mately 85 microamperes, the MicroPak will shut off.
The OVERCURRENT indicator should come on.
The spray head can be removed from assembly as
shown in Figure 8 for cleaning and service.
> The fluid tip [34] should always be installed
and tightened before installing the needle
and valve springs.
NOTE
> After tightening the fluid tip, always check to
see if the proper gap (1/16") between the needle
nuts and air valve stem occur, before installng the
needle and valve springs back into the head.
C A U T I O N
!
Amyl Acetate
Methyl Amyl Acetate
Toluene
Xylene
High Flash Naptha
Mineral Spirits
Non-Conductive (Non-Polar)
POLAR AND NON-POLAR SOLVENTS
Moderately Conductive Extremely Conductive (Polar)
Methyl Isobutyl Ketone
Ethyl Acetate
Methyl Ethyl Ketone
Butyl Carbitol
Methanol
Carbitol
Diacetone
Butyl Alcohol
Acetone
Butyl Cellosolve
AA-03-02.11