Sears 919.15516 - Manual (Page 7)

MAINTENANCE
The recommended cleaning procedures for suction feed
and pressure feed are given below. The air cap cleaning
and lubrication procedure are the same regardless of the
type of feed set-up used. Be sure to follow these instruc­
tions after each use.
SPRAY GUN CLEANING
Suction Feed Clean-Up
1. Turn off air supply, and remove cup from lid.
2. Empty the material from cup and rinse with a clean
solvent.
3. Fill cup with solvent and attach to the lid.
Note
Always clean with reduced air pressure. An air
pressure no greater than 15 to 20 PS I will allow
quick and thorough cleaning of the cup and gun.
4. Turn on the air supply and spray solvent through the
spray gun. While spraying, shake the gun up and
down to remove all excess material from the lid.
Repeat Steps 1-4 above with a clean solvent until all
traces of material are removed.
5. Turn off air supply to gun.
6. To clean vent hole, shut off air to gun, hold the trigger
back and invert cup over solvent container. Allow sol­
vent to drip out vent hold in lid until clear solvent is
seen.
7. Wipe the outside of the spray gun and cup with a
solvent soaked cloth.
8. Clean air cap and lubricate gun per instructions given
in “Air Cap Cleaning.”
Pressure Feed Clean-Up:
1. First, turn off air supply to material source (cup, tank or
pump). Release material pressure from the system by
opening relief valve or pulling trigger on gun.
2. On a pressure cup or tank, material in hoses may be
drained back. Lid must be loose and all air pressure
off. Keep gun higher than container and pull the trig­
ger. Allow material to drain back into the container.
Pour off remaining material.
Note
Do not immerse the gun in solvent - this will
wash out the lubricants and dry out packings.
3. Equipment, such as a commercial hose cleaner, can
be used to clean inside of fluid hose, gun and fluid
tube in cup or tank. Connect fluid hose to hose
cleaner. Open air valve at hose cleaner. Pull trigger on
gun and slowly open cleaning solvent valve on hose
cleaner. Flush until clean. Shut off mixing valve when
solvent and air discharge is clear. Allow air to dry
passages and then shut air valve at hose cleaner. To
clean cup or tank lid, repeat with hose connected to
hose cleaner. Lid of cup or tank should be set on a
waste container or off to one side of the tank shell.
Note
The hose cleaner cannot be used with a pump.
Pump must be run with proper solvent to clean.
4. Clean inside of container and lid. Wipe down gun with
a rag dampened with cleaning solvent.
5. Without a hose cleaner, remove excess material from
cup or tank and clean. Set up cup, tank or pump to
operate with clean cleaning solvent. Turn off atomiza­
tion air to gun. Trigger gun into a waste container.
Continue flushing until cleaning solvent is clear. Blow
air through hose to dry. Wipe hose and gun with a rag
dampened with cleaning solvent.
6. Clean air cap and lubricate gun per instructions given
below.
AIR CAP CLEANING
Remove the air cap and, if dirty with dry paint, let it soak
in clean solvent. Later, brush and wipe off the air cap. If
any holes in the cap are clogged, probe them with a
toothpick. Don’t use wire, nails, or metal tools. This may
damage the holes and result in imperfect spray
patterns.
Lubrication:
After each use, place drop of oil on points shown.
Springs behind the fluid needle and air valve should
have a light coat of grease.
Fluid Needle
Spring
Trigger Bearing Screw
Fluid Needle
Packing
Fluid inlet
- (e.g. paint)
Oil Fluid Needle to
Lubricate Packing
- Air Valve Packing
- Air Valve Spring
■ Air inlet