Page 4 SB-2-605-F
CLEANING
Note
For routine cleaning, it is not nec-
essary to remove cup from gun.
Do not remove washer (26) from
gun. If washer (26) is removed, it
must be replaced.
Do not soak the lid in solvent for
extended periods of time. Doing
so could cause cup/lid sealing
problems and leakage.
The cup lid is designed to be disposable
but may be cleaned and reused if slightly
contaminated with overspray.
If lid
becomes tight, or does not fit, it is due
to extended soaking in solvent. Let lid air
dry overnight and the lid should return to
its original size and fit.
Remove lid and properly dispose of any
excess paint. Pour in a small amount of
clean solvent. The amount will vary with
different coatings and solvents. Reinstall
lid. Shake cup to wash down the inside
surfaces.
Hold lid while shaking to prevent
lid from coming off
. Pull trigger to allow
some solvent to be flushed through gun.
Remove lid and pour out dirty solvent. Add
a small amount of clean solvent and repeat
procedure. Wipe exterior of lid with a clean
cloth and clean solvent.
If a paint filter was used in the bottom of
the cup outlet, it should be removed and
cleaned or replaced at this time. Dispose
of used cup lid if contaminated and
replace with new.
Chart 1 For Model Numbers FLG-615 and FLG-635 Gravity Feed Spray Guns
Spray Gun
Spray Gun
No. on
Ref. No. 2
Ref. No. 3
Fluid
Model
Computer
Air
Air Cap
Fluid Tip
Tip
Number
Number
Cap
Part No.
Computer No.
Part No.
Computer No.
Size
FLG-615-114
611101
1
FLG-1-1
690000
FLG-102-14K
690003
1.4 (Std.)
FLG-635-316
611103
3
FLG-1-3
690001
FLG-102-16K
690004
1.6 (Std.)
FLG-102-14K
690003
1.4 (Std.)
FLG-102-18K
690005
1.8 (Opt.)
FLG-102-22K
690006
2.2 (Opt.)
TROUBLESHOOTING
CONDITION
CAUSE
CORRECTION
Heavy top or
bottom pattern
Heavy right or left
side pattern
Heavy center pattern
Split spray pattern
Jerky or fluttering spray
Unable to get round spray
Will not spray
Horn holes plugged.
Obstruction on top or bottom of fluid tip.
Cap and/or tip seat dirty.
Left or right side horn holes plugged.
Dirt on left or right side of fluid tip.
Remedies for the top-heavy, bottom-heavy, right-heavy, and left-heavy patterns:
1. Determine if the obstruction is on the air cap or the fluid tip. Do this by making a test spray
pattern. Then, rotate the cap one-half turn and spray another pattern. If the defect is inverted,
obstruction is on the air cap. Clean the air cap as previously instructed.
2. If the defect is not inverted, it is on the fluid tip. Check for a fine burr on the edge of the fluid
tip. Remove with #600 wet or dry sand paper.
3. Check for dried paint just inside the opening; remove by washing with solvent.
Clean. Ream with non-metallic point.
Clean.
Clean.
Clean. Ream with non-metallic point.
Clean.
Fluid flow too high for atomization air.
Material flow exceeds air cap's capacity.
Spreader adjustment valve set too low.
Atomizing pressure too low.
Material too thick.
Atomization air pressure too high.
Fluid flow too low.
Spreader adjusting valve set too high.
*Loose or damaged fluid tip/seat.
Material level too low.
Container tipped too far.
Obstruction in fluid passage.
Dry or loose fluid needle packing nut.
Spreader adjustment screw not seating
properly.
Air cap retaining ring loose.
No air pressure at gun.
Fluid needle adjusting screw not open enough.
Fluid too heavy for gravity feed.
Balance air pressure and fluid flow. Increase spray
pattern width with spreader adjustment valve.
Thin or lower fluid flow.
Adjust.
Increase pressure.
Thin to proper consistency.
Reduce at transformer or gun.
Increase fluid flow (increases gun handling speed).
Adjust.
Tighten or replace.
Refill.
Hold more upright.
Backflush with solvent.
Lubricate or tighten.
Clean or replace.
Tighten.
Check air supply and air lines, blow out gun air
passages.
Open fluid needle adjusting screw.
Thin material and/or change to larger tip size.
*Most common problem.
