Vaper HVLP User manual

1
HVLP Spray Guns
Instruction Manual

SAFETY ALERT
Read and understand this entire instruction manual before
attempting to assemble, install, operate or maintain this
spray gun. Failure to comply with the instructions may result in serious personal
injury and/or property damage!
The following signal words are used to emphasize safety warnings that must be fol-
lowed when using this product:
Indicates an imminently hazardous situation that, if not
avoided, WILL result in death or serious injury.
Indicates a potentially hazardous situation that, if not avoid-
ed, COULD result in death or serious injury.
Indicates a potentially hazardous situation that, if not avoid-
ed, MAY result in minor or moderate injury.
Indicates important information, which if not followed, MAY
cause damage to equipment.
UNPACKING & INSPECTION
After opening the carton, unpack your new spray gun and related parts & accessories.
Please inspect it carefully for any damage that may have occurred during transit.
Please check it against the photograph on carton. If any parts are missing, please call
factory customer service at 1-800-386-0191.
Do not operate this spray gun if damaged during shipment,
handling or misuse. Do not operate the spray gun until the
parts have been replaced or the fault rectified. Failure to do so may result in serious
personal injuryor property damage.
All damaged parts must be repaired or replaced as needed prior to operating this
spray gun.
Check to see that all nuts, bolts and fittings aresecurebeforeputting this tool into
service. If you have any questions, or require assistance with damaged or missing
parts, please contact our factory customer service department at:
11--880000--338866--00119911
Please have the model number, and date of purchase available for refer-
ence when calling.
MODEL NUMBER: ____ _________________________
DATE of PURCHASE: _____________________________
2 3
INTRODUCTION
It is the owner and/or operator’s responsibility to study all WARNINGS, operating, and
maintenance instructions contained on the product label and instruction manual prior
to operation of this spray gun. The owner/operator shall retain product instructions
for future reference.
The owner and/or operator are responsible for maintenance, maintaining all decals or
warning labels and while in use, maintaining the unit in good working order. If the
owner and/or operator are not fluent in English, the product warnings and instruc-
tions shall be read and discussed with the operator’s native language by the purchas-
er/owner or his designee. Make sure that the operator comprehends its contents.
Safety information shall be emphasized and understood prior to usage. The spray gun
shall be inspected per the operating instructions.
Users of this spray gun must fully understand these instructions. Each person operat-
ing this spray gun must also be of sound mind and body and must not be under the
influence of any substance that might impair their vision, dexterity, or judgment.
Protect yourself and others by observing all safety information.
Failure to comply with instructions could result in personal injury and/or property
damage!
If you encounter any problems or difficulties, please contact our customer service
department at:
11--880000--338866--00119911
This instruction manual is intended for your benefit. Please read and follow the safe-
ty, installation, maintenance and troubleshooting steps described within to ensure
your safety and satisfaction. The contents of this instruction manual are based upon
the latest product information available at the time of publication. The manufacturer
reserves the right to make product changes at any time without notice.

4 5
WHAT COULD HAPPEN HOW TO PREVENT IT
HAZARD
Risk of flying objects
Certain parts are under pressure whenever the gun is connected to a
pressurized air line. These parts may be propelled if the gun is
disassembled.
Compressed air may propel dirt, metal shavings, etc. and possibly
cause an injury and/or damage to the workpiece.
Prolonged exposure to air spray can result in permanent damage to
hearing.
Disconnect the gun from the air line, or completely depressurize the
air line whenever the gun is to be disassembled.
Never point any nozzle or sprayer toward a person or part of the body.
Always wear ANSI 278.1 safety approved goggles or glasses when
spraying.
Always work in a clean environment. Do not aim the spray gun at any
dust of debris.
Always wear hearing protection when operating spray equipment.
WHAT COULD HAPPEN HOW TO PREVENT IT
HAZARD
Risk of injection
Spray guns operate at pressures and velocities high enough to
penetrate human and animal flesh, which could result in amputation or
other serious injury.
See a physician immediately!
Never place hands in front of nozzle.
Direct spray away from self and others.
WHAT COULD HAPPEN HOW TO PREVENT IT
HAZARD
Risk of bursting
Do not use pressure that exceeds the operating pressure of any of the
parts (hoses, fittings, etc.) in the painting system.
Keep hose away from sharp objects. Bursting air hoses may cause
injury.
Examine air hoses regularly and replace if damaged.
Always use a pressure regulator on the air supply to the spray gun.
Exceeding the pressure rating of air tools, spray guns, air operated
accessories, tires, and other inflatables can cause them to explode or
fly apart, and could result in serious injury.
IMPORTANT SAFETY RULES FOR ALL SPRAY GUNS
SAVE THESE INSTRUCTIONS
RReeaaddaanndduunnddeerrssttaannddaalllliinnssttrruuccttiioonnss..Failure to follow all
instructions included with this product could result in seri-
ous personal injury and/or property damage.
Follow all local electrical and safety codes as well as in the United States, the National
Electrical Codes (NEC) and the Occupational Safety and Health Act (OSHA).
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tthhiisspprroodduucctt::
WHAT COULD HAPPEN HOW TO PREVENT IT
HAZARD
Risk of explosion or fire - flammable materials
When paints or materials are sprayed, they are broken into very small
particles and mixed with air. This will cause certain paints and
materials to become extremely flammable and could result in serious
injury or death.
Never spray closer than 25 feet to the air compressor! Motors,
electrical equipment and controls can cause electrical arcs that will
ignite a flammable gas or vapor. Never store flammable liquids or
gases in the vicinity of the compressor. If possible, locate the air
compressor in separate room. Never spray into compressor,
compressor controls or the motor.
Never spray near open flames or pilot lights in stoves or heaters.
Never smoke or eat while spraying paint, insecticides, or other
flammable substances.
Provide ample ventilation when spraying indoors.
To reduce the risk of static sparking, grounding continuity to the spray
equipment and the object being sprayed must be maintained.
When spraying and cleaning, always follow the instructions and safety
precautions provided by the material manufacturer (Refer to MSDS)
WHAT COULD HAPPEN HOW TO PREVENT IT
HAZARD
Risk of explosion - incompatible materials
Halogenated hydrocarbon solvents such as 1,1,1-Trichloroethane and
Methylene Chloride can chemically react with the aluminum used in
most spray equipment, and this gun and cup, to produce an explosion
hazard and could result in serious injury or death.
Read the label or data sheet for the material you intend to spray.
1. Never use any type of spray coating material containing these
solvents.
2. Never use these solvents for equipment cleaning or flushing.
3. If in doubt as to whether a material is compatible, contact your
material supplier.
WHAT COULD HAPPEN HOW TO PREVENT IT
HAZARD
Risk of breathing
Some paints, coatings and solvents may cause lung damage, and
burns if inhaled or allowed to come into contact with skin or eyes.
Spraying of some organic solvents can cause intoxication and serious
damage to health.
Do not spray acids, corrosive materials, toxic chemicals, fertilizers or
pesticides. Using these materials could result in death or serious
injury.
Use a NIOSH approved mask or respirator and protective clothing
designed for use with your specific application and spray materials.
Some masks provide only limited protection against toxic materials
and harmful paint solvent. Consult with a Safety Expert or Industrial
Hygienist if uncertain about your equipment or materials.
Use the spray gun in well-ventilated areas.
Keep visitors away and NEVER allow children or pets in the work area.
IMPORTANT SAFETY RULES FOR ALL SPRAY GUNS
SAVE THESE INSTRUCTIONS

FEATURES AND SPECIFICATIONS
1) 600ml Aluminum Paint Cup
2) Fluid Inlet (Optional Material Filter)
3) Air Cap
4) Fluid Tip (Nozzle)
5) Trigger
6) Packing Nut (Air Valve)
7) Air Control Knob
8) Cup Lid
9) Fluid Needle
10) Fluid Control Knob
11) Spray Pattern Control Knob
12) 1/4” NPS Air Inlet Fitting
INTRODUCTION
Your new TEKZ® spray gun is a vital link in the finishing application. In addition to
operating the spray gun properly, techniques of surface preparation, paint preparation
and the nature of the specific spray material to be used must be understood. These
instructions will explain the differences among various spray methods and serve as a
guide in the proper operation and techniques of spray painting. Please refer to the
Parts section of this manual for model specific information.
TYPES OF SPRAY GUNS
There are three basic types of spray guns: siphon feed, pres-
sure feed, and gravity feed. The type of spray gun used
depends upon the application and the size of the project.
These types of spray guns can be either “conventional” spray
or HVLP (High Volume Low Pressure) spray.
Conventional spray guns use a much higher air cap pressure
(more than 10 PSI) to atomize the paint than is used by HVLP
spray guns which results in more overspray and lower transfer
efficiency. (Transfer efficiency refers to the percentage of paint
sprayed that actually adheres to the surface being painted).
HVLP, electrostatic and airless paint spray guns are the only spray methods that meet
the strict 65% transfer efficiency rate required by some air quality district regulations.
This improved transfer efficiency results in a significant material savings when com-
pared to conventional spray guns. Be sure to check local, state and national regula-
tions that may apply before performing any spraying operations.
6 7
Conventional
HVLP
WORK AREA SAFETY
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MMAATTEERRIIAALL..
1. KKeeeeppyyoouurrwwoorrkkaarreeaacclleeaannaannddwweelllllliitt..Clutter and dark areas invite accidents.
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ssuucchhaassiinntthheepprreesseenncceeooffffllaammmmaabblleelliiqquuiiddss,,ggaasseess,,oorrdduusstt. Electric motors used
in these machines create sparks which may ignite the dust or fumes.
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PPRREESSSSUURREEFFEEEEDDCCIIRRCCUULLAATTIINNGGHHOOOOKKUUPP
For heavy production spraying, air pressure for atomiza-
tion is controlled by the regulator on the air source. The
fluid pressure is regulated by a separate fluid regulator
at the bulk paint source.
GGRRAAVVIITTYYFFEEEEDDCCUUPPHHOOOOKKUUPP
This popular method is similar to the siphon feed with cup
except that the paint cup is mounted above the spray gun.
This creates a positive fluid pressure in the fluid nozzle while
providing better balance and comfort for the operator.
ASSEMBLY
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ffiirrsstt; this will avoid the possibility of cross threading the
parts. If the parts can not be turned by hand easily, make sure you have the correct
parts, unscrew by hand easily, make sure you have the correct parts, unscrew,
realign, and try again. NEVER use undue force in mating parts.
1) Connect the paint cup to the fluid inlet nipple and tighten to ensure a good seal,
using spanner. Use of the supplied filter screen is optional. This filter helps protect
against small particle contaminants. See parts drawing for proper filter placement.
2) Wrap the threads on the air inlet nipples of
the spray gun and the regulator with a
couple of layers of PTFE tape to help
prevent air leaks.
3) Connect the regulator to the air inlet nipple
at the base of the gun handle.
4) Connect the air supply to the air inlet
nipple on the regulator.
8 9
Filtered,
regulated
air source
Fluid Fluid Regulator
Air
Filtered
air source
PTFE Tape Air Source
In order to qualify as an HVLP spray gun, dynamic air pressure, when measured at
the air cap, must not exceed 10 PSI. HVLP Spray guns produce a soft, low velocity
spray pattern which provides increased control while reducing paint “bounce-back”
and overspray. As a result, HVLP is also well suited for spraying surfaces with
recessed areas.
TYPES OF SPRAY GUN HOOKUPS
SSIIPPHHOONNFFEEEEDDCCUUPPHHOOOOKKUUPP
Air pressure for atomization is controlled by the regulator
on the air source. The amount of fluid is adjusted by the
fluid control knob on the gun, the paint viscosity, and the
air pressure. The siphon cup must be vented to the
atmosphere.
PPRREESSSSUURREEFFEEEEDDCCUUPPHHOOOOKKUUPP
Air pressure for atomization is controlled by the regu-
lator on the air source. The fluid pressure is set by
adjusting the cup regulator. The amount of fluid is also
adjusted by the fluid control knob. This method is
required for heavy fluids and when using internal mix
nozzle spraying. This method generally requires a spe-
cial fluid tip, needle and air cap set.
PPRREESSSSUURREEFFEEEEDDTTAANNKKHHOOOOKKUUPP
This method is similar to the pressure feed cup hookup
with the added benefit of being able to orient the gun in
any position independent of the tank. This method is
useful for medium production or large scale spraying
applications where large quantities of paint are used.
For medium production spraying (single regulator setup
on tank), air pressure for atomization is controlled by
the regulator at the air source. The amount of fluid is
adjusted by the regulator on the paint pressure tank.
For portable painting operations (double regulator setup
on tank), air pressure for atomization and fluid supply is
regulated by two individual air regulators on the paint
pressure tank.
Filtered,
regulated
air source
Fluid
control
knob
Filtered,
regulated
air source
Fluid
control
knob
Fluid pressure
regulator
Cup pressure hose
Filtered,
regulated
air source
Pressure Tank
Fluid Outlet
Air
Air
Filtered,
regulated
air source
Pressure Tank
Fluid
Air
Air

9) Adjust the air pressure and paint flow to provide a uniform dispersion of atomized
paint throughout the pattern. Keep air pressure as low as possible to minimize
paint “bounce back” and overspray. Excessive fluid flow will result in a heavy
center spray pattern. Inadequate flows will cause the spray pattern to split.
Please see the Troubleshooting section of this guide if any problems occur.
FAN DIRECTION
The position of the air cap horns determines the direc-
tion of the fan (horizontal or vertical spray pattern).
Loosen the lock ring on the air cap and rotate the horns
to achieve the desired pattern. Hand tighten lock ring
after adjustment.
SPRAY PATTERN ADJUSTMENT
SIPHON AND GRAVITY FEED GUNS
1) Adjust air pressure to the spray gun according to the
recommendations supplied by the spray material
manufacturer. This air pressure is typically below 20
PSI for HVLP spray guns and between 40 to 60 PSI
for conventional spray guns. Adjust air pressure with
the trigger pulled and the air control knob (if applica-
ble) fully open.
2) The width of the “fan spray” is controlled by the pat-
tern control knob. Turn knob counterclockwise to
increase the width of the fan spray pattern. Turn knob
clockwise to decrease the spread of the fan spray pattern for a round pattern.
3) Trigger a short burst while turning fluid control knob until the desired pattern on
the test target and adjust the fluid control knob until the desired atomization
(spray) pattern is achieved. If the spray is too fine, creating excessive overspray,
there is too much air for the amount of paint being sprayed - Reduce the air pres-
sure or open the fluid control to spray more material. If the spray is too coarse,
(spitting globs of paint), reduce the amount of material with the fluid control knob
or thin the paint.
10 11
Nozzle wings
horizontal
Lock ring
Vertical
pattern
Nozzle wings
vertical Horizontal
pattern
Lock ring
Spray Pattern
Control Knob
PREPARATION FOR SPRAYING
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pprriioorrttoosshhiippmmeenntt..
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WATER AND/OR OIL IN COMPRESSED AIR
All compressor pumps discharge some condensed water, oil or contaminates with
the compressed air. IIMMPPOORRTTAANNTT::This condensation will cause “fish eyes” to appear
in the paint job. Install appropriate water/oil removal filter equipment and controls
as necessary for the intended application.
Failure to install appropriate water/oil removal equipment
may result in damage to machinery or workpiece.
1) Thoroughly mix paint to be sprayed in accordance with the manufacturer’s
instructions, adding thinner where necessary.
2) Strain material through 60 to 90 mesh screen.
3) Fill the gravity feed paint cup with the material. Be careful not to overfill the cup.
Install cup lid and make sure vent hole is clear.
4) Attach 1/4" NPS (F) air outlet of locking pressure regulator to 1/4" NPS air inlet on
spray gun.
5) Attach air supply to 1/4" NPT (M) air inlet on locking pressure regulator.
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5) Start the air compressor.
6) Adjust air pressure via air supply regulator. NNOOTTEE::HHVVLLPPooppeerraattiioonnrreeqquuiirreessaa
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DDOONNOOTTeexxcceeeedd110000PPSSIIMMaaxxiimmuummpprreessssuurree
7) Prepare a piece of scrap material for use as a spray gun test target.
8) Depress spray gun trigger fully to spray material.
NNOOTTEE: Depressing trigger partially will cause only air to be released.

CARE AND MAINTENANCE
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mmeenntt,,oorraannyyssoouurrcceeooffhheeaattoorrssppaarrkkss..
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iinngg..SSuucchhssoolluuttiioonnsswwiillllaattttaacckkaannddddeeggrraaddeeaalluummiinnuummaallllooyyppaarrttssooffgguunnmmaakkiinnggiitt
uunnuussaabbllee..
DAILY CLEANING
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sspprraayymmaatteerriiaallssddrryyqquuiicckkllyyiinntthheessmmaallllppaassssaaggeessoofftthhee
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ddaanncceewwiitthhllooccaallccooddeess..FFoolllloowwmmaannuuffaaccttuurreerr’’ssiinnssttrruuccttiioonnssffoorrpprrooppeerruusseeooffcclleeaann--
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CLEANING SPRAY GUNS WITH PAINT CUPS
1) Empty paint cup; then rinse with appropriate solvent recommended by the spray
material manufacturer.
2) Refill paint cup with cleaning solvent and attach to gun. Spray solvent through the
gun while shaking the gun. Wipe the exterior of the gun with a solvent soaked rag.
Repeat until the gun is clean.
3) Remove the air cap and soak in solvent until clean. Use a small bristle brush for
stubborn stains. If it becomes necessary to clean the air cap holes, use a toothpick
or small brush. Our #19112 Spray Gun Cleaning Kit provides an
assortment of cleaning brushes to maintain your spray guns and help keep them
lasting longer. NNEEVVEERRUUSSEEAAMMEETTAALLWWIIRREEOORROOTTHHEERRHHAARRDDIINNSSTTRRUUMMEENNTTTTOO
CCLLEEAANNPPRREECCIISSIIOONNDDRRIILLLLEEDDAAIIRRPPAASSSSAAGGEESS..DDAAMMAAGGEEDDAAIIRRPPAASSSSAAGGEESSWWIILLLL
CCAAUUSSEEAADDIISSTTOORRTTEEDDSSPPRRAAYYPPAATTTTEERRNN.
12 13
PATTERN ADJUSTMENT FOR PRESSURE HOOKUPS
1) Adjust air pressure to the spray gun according to the recommendations supplied
by the spray material manufacturer. This air pressure is typically between 40 to 60
PSI for conventional spray guns. Adjust air pressure with the trigger pulled and the
air control knob (if applicable) fully open.
2) The width of the “fan spray” is controlled by the pattern control knob. Turn knob
counterclockwise to increase the width of the fan spray pattern. Turn knob
clockwise to decrease the spread of the fan spray pattern for a round pattern.
3) Open the fluid control knob by turning counterclockwise about three turns.
4) Start the tank pressure at 0 PSI and turn the tank regulator slowly to increase fluid
delivery until the desired atomization (spray) pattern is achieved.
5) If the spray pattern is too coarse, reduce the tank pressure with the tank regulator
to reduce the amount of material. Trigger a short burst to relieve the tank pressure,
and then increase tank pressure to slowly until a proper atomization pattern is
achieved.
6) The fluid control knob can be used for fine adjustment of the atomization pattern.
Before spraying the workpiece, practice on a cardboard or
other suitable test target to ensure that the spray pattern size
and consistency are correct.
GUN HANDLING
For best results, please follow these basic guidelines
when spraying:
1) Always keep the spray gun perpendicular to the
surface being painted.
2) Keep the nozzle about 6 to 12 inches from the work
surface throughout the stroke.
3) Always keep the gun in motion while spraying.
Stopping the gun motion in mid-stroke will cause a
build up of paint which can cause runs in the finish.
4) Do not “fan” the gun in an arcing motion as this
creates an uneven finish by producing a build up of
paint in the middle portion of the stroke and thinner
coating at each end of the stroke.
5) Trigger the gun properly - Start the gun moving at
the beginning of each stroke BEFORE SQUEEZING THE TRIGGER and release the
trigger BEFORE STOPPING GUN MOTION at the end of each stroke.
6) The amount of paint being applied to the surface varies due to the speed of the
stroke, distance from the work surface, the adjustment of the fluid control knob
and the air pressure being used. NNOOTTEE::TToorreedduucceeoovveerrsspprraayyaannddmmaaxxiimmiizzee
eeffffiicciieennccyy,,aallwwaayysssspprraayywwiitthhtthheelloowweessttppoossssiibblleeaattoommiizziinnggaaiirrpprreessssuurree..
7) The material deposited should always be even and wet. Overlap each stroke just
enough to obtain a uniform finish.
8) Use appropriate masking materials (masking paper, tape, etc.) as needed to protect
other surfaces from overspray.
Thin Coat Thick Coat Thin Coat
INCORRECT
Uniform
Coat
Uniform
Coat
Uniform
Coat
Start
stroke
Pull
Trigger
6 to 9"
Release
Trigger End
Stroke
CORRECT

AIR NOZZLE, FLUID TIP, NEEDLE ASSEMBLY
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1) All nozzles and needles are precision made and should be handled with care.
2) Except as described in “Fluid Needle Adjustment”, do not make any alterations in
the gun. To do so will cause finishing difficulties.
3) To clean nozzles, soak them in solvent to dissolve any dried material, then blow
them clean with compressed air.
4) Do not probe any of the holes in the nozzles with metal instruments. If probing is
necessary, use only a tool that is softer than brass.
FLUID NEEDLE ADJUSTMENT
1) Loosen the needle cap.
2) Screw the needle assembly locknut out for more trigger movement, in for less
trigger movement.
3) Adjust the needle assembly so that when the trigger moves, the air valve assembly
moves 1/16” to 3/32” before the needle assembly moves.
4) Tighten the needle cap.
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O-RINGS, SEALS, AND PACKING NUTS
1) Check and replace any damaged 0-rings and seals. O-rings and seals can be wiped
clean but not soaked in solvent.
2) Unscrew packing nuts and replace the packing ONLY if a leak will not stop when
the nut is tightened. Do not over tighten a packing nut as this will restrict
movement of the needle.
3) Reassemble in reverse order of above and use light machine oil to lubricate
moving parts.
STORAGE
1) When not in use, turn the fluid adjustment knob counter-clockwise to open to
reduce the spring tension on the needle fluid tip.
2) Spray gun mmuussttbbeecleaned and lightly lubricated prior to storage.
14 15
4) Clean gaskets with solvent soaked rag. To prevent damage, do not immerse gas-
kets or spray gun in solvents as this is detrimental to the lubricants and packings.
5) After using water to clean out water based paints or materials, spray mineral spirits
through the gun to prevent corrosion.
6) Lubricate gun after cleaning using light machine oil.
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Apply light machine oil to: fluid needle packing, air valve packing, side port control
packing, and trigger point. Coat fluid control spring and all threaded connections with
petroleum jelly prior to storage.
CLEANING SPRAY GUNS USED WITH PAINT TANKS
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1) Open the vent on the paint tank. If using an external mix cap, loosen cap slightly.
2) Reduce air pressure to 10 to 20 PSI. Hold a wadded piece of cloth over the tightly
around the air cap opening(s) and pull the trigger. Air will back up thorough the
fluid nozzle and force fluid out of the hose and back into the tank.
3) Pour paint from the tank and clean tank with solvent and rags.
4) Pour enough thinner into the tank to clean the hose and gun thoroughly. Close the
tank and spray from the gun until the solvent comes out clean.
5) Remove fluid hose and blow it out thoroughly to remove all traces of solvent in the
hose.
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TROUBLESHOOTING (Continued)
16 17
Problem Encountered Possible Cause Corrective Action
Excessive overspray Gun too far from work surface. Adjust to proper distance.
Improper stroking Move at moderate pace, parallel to
(arcing, gun motion too fast). work surface.
Excessive fog Too much, or too fast-drying thinner. Remix properly.
Toomuch atomization air pressure. Reduce pressure.
Dry spray Air pressure too high. Reduce air pressure.
Guntip too far from work surface. Adjust to proper distance.
Gunmotion too fast. Slow down.
Gunout of adjustment. Adjust.
Fluid leaking from packing nut Packing nut loose. Tighten, do not bind needle.
Packing worn or dry. Replace or lubricate.
Fluid leaking or dripping from Packing nut too tight. Adjust.
front of pressure feed gun Dry packing. Lubricate.
Fluid tip or needle worn or damaged. Replace tip.
Foreign matter in tip. Clean.
Fluid needle spring broken. Replace.
Wrong size needle or tip. Replace.
Runs and sags Too much material flow. Adjust gun or reduce fluid pressure.
Material too thin. Mix properly or apply light coats.
Guntilted on an angle, or gun motion Hold gun at right angle to work and adapt
too slow. to proper gun technique.
Thin, sandy coarse finish Gun too far from surface. Check distance. Normally about 8”.
drying before it flows out Too much air pressure. Reduce pressure and check spray pattern.
Improper thinner being used. Follow paint manufacturer’s
mixing instructions.
Thick, dimpled finish Gun too close to surface. Check distance. Normally about 8”.
“orange peel” Too much material coarsely atomized. Increase air pressure or reduce
fluid pressure.
Airpressure too low. Increase air pressure or reduce
fluid pressure.
Improper thinner being used. Follow paint manufacturer’s
mixing instructions.
Material not properly mixed. Follow paint manufacturer’s instructions.
Surface rough, oily, dirty. Properly clean and prepare surface.
TROUBLESHOOTING
Problem Encountered Possible Cause Corrective Action
Heavy top or bottom pattern. Horn holes plugged. Clean. Ream with non-metallic point.
Obstruction on top or bottom of fluid tip. Clean.
Capand/or tip seat dirty. Clean.
Heavy right or left side pattern. Left or right side horn holes plugged. Clean Ream with non-metallic point.
Dirt on left or right side of fluid tip. Clean.
Heavy center pattern. Fluid pressure too high for atomization air Balance air and fluid pressure.
(pressure feed).
Material flow exceeds air cap’s capacity. Increase spray pattern width with
spreader adjustment valve.
Thin or lower fluid flow.
Spreader adjustment valve set too low. Adjust.
Increase pressure.
Material too thick. Thin to proper consistency.
Split spray pattern. Atomization air pressure too high. Reduce at regulator or gun.
Fluid pressure too low (pressure feed only). Increase fluid pressure
(increases gun handling speed).
Spreader adjusting valve set too high. Adjust.
Spitting or pulsating spray. Loose or damaged fluid tip/seat. Tighten or replace.
May also be accompanied by
bubbling in the paint cup. Material level too low. Refill.
Container tipped too far. Hold more upright.
Obstruction in fluid passage. Back flush with solvent.
Loose or broken fluid tube or Tighten or replace.
fluid inlet nipple.
Dry, loose or worn needle packing. Replace packing.
Unable to get round spray. Spreader adjustment screw not Clean or replace.
seating properly.
Aircap retaining ring loose. Tighten.
Will not spray. No air pressure at gun. Check air supply and air lines.
Internal mix or pressure feed air cap and Change to proper suction feed air cap
tip used with suction feed. and tip.
Fluid pressure too low with internal mix Increase fluid pressure at tank.
cap and pressure tank.
Fluid needle adjusting screw not open Open fluid needle adjusting screw.
enough.
Fluid tool heavy for suction feed. Thin material or change to pressure feed.
Starved spray pattern. Inadequate material flow. Back fluid adjusting screw out to first
thread or increase fluid pressure at tank.
Lowatomization air pressure (suction feed). Increase air pressure and rebalance gun.
Toomuch atomization air pressure. Reduce pressure.

18 19
PRODUCTION GUN PARTS BREAKDOWNTOUCH UP GUN PARTS BREAKDOWN
11
Air Adjustment Valve
21
Gasket
31
Air Valve Spring
41
Air Valve Piston Shaft
51
O-Ring
71
O-Ring
81
Pliable Packing Washer
61
Air Valve Seat
91
Air Valve Packing Nut
10 1
Air Cap
12 1
Air Manifold Spacer
11 1
Fluid Nozzle
13 1
Retention Screw
14 1
Paint Needle Washer
15 1
Sealing Washer
16 1
Locking Spring
17 1
O-Ring
18 1
Trigger Pin - Pivot
Ln # QtyDescription
19 1
Trigger Pin- Fluid Needle
20 1
Trigger
22 1
Lid
23 1
Cup
21 2
Retaining Ring
24 1
Fluid Filter
25 1
Fluid Inlet Fitting
27 1
Fluid Needle
26 1
Gun Body
28 1
Fluid Needle Spring
29 1
Fluid Adjustment Locking Ring
30 1
Fluid Adjustment Knob
31 1
Pattern Adjustment Valve
32 1
Air Inlet Fitting
33 1
Gun Wrench
34 1
Internal/External Hex Wrench
35 1
Brush
Ln # QtyDescription
1
33
34
35
23456789
10 11 12 13 14 16
15 17
18 19 20 21 22
23
24
25
27 28 29 30
31
32
26
Item numbers in REVERSE TYPE included in 19910 Spray Gun Rebuild Kit
Item numbers in REVERSE TYPE included in 19909 Spray Gun Rebuild Kit