Graco HVLP Series Operation manual

309205
Rev. D
Cup Feed
Includes 1-quart (1 liter) cup
Model 244113, without fluid set
Model 244117, with # 3 fluid set
T10746
Remote Pressure Feed
Model 244115, without fluid set
Model 244118, with # 3 fluid set
INSTRUCTIONS–PARTS LIST
INSTRUCTIONS
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
US Patent Pending
HVLP–Turbine Guns
10 psi (0.07 MPa, .7 bar) Maximum Inlet Air Pressure
50 psi (0.35 MPa, 3.5 bar) Maximum Inlet Fluid Pressure
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
ECOPYRIGHT 2000, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
Parts

2 309205
Table of Contents
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spraying Techniques 12. . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty 24. . . . . . . . . . . . . . . . . . . . . .
Graco Phone Number 24. . . . . . . . . . . . . . . . . . . . . . . . . .
Symbols
Warning Symbol
WARNING
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions.
Caution Symbol
CAUTION
This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow the
instructions.
FIRE AND EXPLOSION HAZARD
Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and
result in a fire or explosion and serious injury.
DGround the equipment.
DIf there is any static sparking or you feel an electric shock while using this equipment, stop
spraying immediately. Do not use the equipment until you identify and correct the problem.
DProvide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid
being sprayed.
DWhen flammable liquid is sprayed or used for flushing or cleaning the equipment, the turbine
must be placed at least 20 feet (6.1 m) away from areas where hazardous concentrations of
flammable vapors are likely to occur.
DUse additional air hose if necessary to ensure that the turbine is operated in a clean, dry, well
ventilated area.
DNever place the turbine inside a spray booth! Use this equipment outdoors or in extremely well
ventilated areas.
DKeep the spray area free of debris, including solvent, rags, and gasoline.
DElectrically disconnect all equipment in the spray area.
DExtinguish all open flames or pilot lights in the spray area.
DDo not smoke in the spray area.
DDo not turn on or off any light switch in the spray area while operating or if fumes are present.
DDo not operate a gasoline engine in the spray area.
WARNING WARNING

309205 3
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.
DThis equipment is for professional use only.
DRead all instruction manuals, tags, and labels before operating the equipment.
DUse the equipment only for its intended purpose. If you are not sure, call your distributor.
DDo not alter or modify this equipment. Use only genuine Graco parts and accessories.
DCheck equipment daily. Repair or replace worn or damaged parts immediately.
DDo not exceed the maximum working pressure of the lowest rated system component. See the
Technical Data on page 21.
DUse fluids and solvents that are compatible with the equipment wetted parts. Refer to the Techni-
cal Data on page 21 for wetted parts.
DDo not use hoses to pull equipment.
DRoute hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not ex-
pose Graco hoses to temperatures above 82_C (180_F) or below –40_C (–40_F).
DWear hearing protection when operating this equipment.
DDo not lift pressurized equipment.
DComply with all applicable local, state, and national fire, electrical, and safety regulations.
DDo not point the gun at anyone or at any part of the body.
DFollow the Pressure Relief Procedure on page 11 if the fluid nozzle clogs and before cleaning,
checking or servicing the equipment.
DTighten all fluid connections before operating the equipment.
DCheck the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
WARNINGWARNING
INSTRUCTIONS
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the
skin, inhaled, or swallowed.
DKnow the specific hazards of the fluid you are using.
DStore hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state and national guidelines.
DAlways wear protective eyewear, gloves, clothing and respirator as recommended by the fluid
and solvent manufacturer.
DDo not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or
fluids containing such solvents in the turbine spray system, which contains aluminum and/or
galvanized-coated parts. Such use could result in a serious chemical reaction, with the possibility
of explosion, which could cause death, serious injury, and/or substantial property damage.

4 309205
Introduction
Features
The Graco HVLP–Turbine Gun features a quick–change fluid set, EasyGlidettrigger and easy–access controls.
One air cap fits all six fluid sets.
Fig. 1
Pattern adjustment knob
Fluid set/needle
Air cap
Duckbill check valve
EasyGlidetTrigger
Air flow control
Fluid flow and pattern size control
Swivel tube
Air inlet
Nut
Cup
Strainer
General Operating Instructions
1. Setup the gun:
a. Adjust the fluid supply (page 5).
b. Establish the correct air flow (page 5).
c. Select the spray pattern and shape (page 6).
d. Select a fluid set (page 7).
2. Prepare the fluid and surface (page 9).
3. Connect the gun to the fluid and air supplies (page
10).
4. Fill the cup or remote pressure pot with fluid you
will be spraying (page 11).
5. Spray (page 12).
6. Clean the gun following the clean–up instructions
(page 14).

309205 5
Setup
Fluid Flow
1. To obtain maximum fluid flow, turn fluid adjustment
knob (21) counterclockwise until the trigger (10)
moves freely. See Fig. 2.
Fig. 2
21
T10746
10
2. For remote pressure pot, hold gun parallel to floor
and adjust fluid pressure at 8 to 10 inch (203 to
254 mm) fluid stream. See Fig. 3.
For 2-quart remote pressure pot:
Set at 4 to 6 psi (0.28 to 0.42 bar).
For 21/2-gallon remote pressure pot:
Set at 8 to 10 psi (0.56 to 0.70 bar).
NOTE: Heavier fluids or longer fluid hoses require
greater pressures.
WARNING
Over-pressurizing the accessory remote pres-
sure pots can cause serious injury. To reduce
the risk, never exceed 50 psi (0.35 MPa,
3.5 bar) Maximum Inlet Fluid Pressure.
Fig. 3 TI0805
8–10 in.
(203–254 mm)
3. If further gun fluid adjustment is needed, turn fluid
adjustment knob (21) clockwise to reduce volume
of fluid output. See Fig. 4.
21
Fig. 4
T10825
Fluid control, adjusts fluid
volume.
+
–
CAUTION
Restricting the trigger and fluid needle travel by
continuously spraying with the fluid adjustment
knob closed (turned clockwise), will cause
accelerated abrasive wear on the fluid needle and
wear on the trigger.
For best results, adjust fluid flow at the pressure
source or use a different size needle/nozzle/air cap
combination.
Air Flow
4. Test spray pattern and atomization while holding
gun about 6 to 8 inches (150 to 200 mm) from test
piece.
5. Air Control Valve (B) on end of the gun controls
both atomizing air and pressure in spray gun cup.
See Fig. 5. Adjust air control valve as needed.
Fig. 5
B
02850
Air control, adjust total
air flow to spray gun.

6 309205
Setup
NOTES:
DControl over-spray mist by using only as much air
as necessary to spray fluid. Lighter fluids require
less air.
DIf atomization is still unacceptable, fluids may be
thinned further or a different fluid set may be re-
quired. Refer to page 8 to determine fluid set or
page 9 to prepare fluid.
Spray Pattern Direction and Shape
The spray pattern and direction are determined by the
pattern selection knob (A) fluid adjustment knob (21)
and air cap (15) positions. See Fig. 6.
Fig. 6
21
T10746
15
A
B
Selecting the Pattern Shape
The Pattern Selection Knob (A) determines the shape
of the spray pattern. To create a round spray pattern,
set the pattern selection knob (A) to RND. To create a
fan pattern, set the pattern selection knob (A) to FAN.
Refer to Fig. 7.
Fig. 7
Pattern selection
knob, adjusts fan
pattern.
Round pattern
Set knob to RND
Vertical pattern
Set knob to FAN
A
Horizontal pattern
Set knob to FAN
TI0825
Adjusting the Pattern
Change the pattern by adjusting the fluid knob (21)
and pattern selection knob (A).
NOTE: Reducing the fluid flow rate or turning the air
knob to RND will reduce the pattern width. Using air
cap 197056 will create a highly productive, wider
pattern. See Fig. 8.
The air control (B) controls the TOTAL air to the pat-
tern and gun. See Fig. 6.
As the fluid flow rate is reduced the pattern becomes
smaller.
Using too much air will cause overspray.
Fig. 8
–
+
TI0812
–
+

309205 7
Setup
Selecting Fluid Sets
The Turbine Spray Gun includes a #3 fluid set, Part
No. 244124. Grooves at the end of the fluid needle
indicate the size of fluid set.
Fluid sets include a nozzle (14a), o–ring (4) and needle
assembly (14b). See Fig. 9.
NOTE: To order other replacement parts for gun, see
parts drawing and list for gun model on page 23.
Fig. 9
fluid set
14b
TI082
4
4
14a
WARNING
Do not exceed the gun’s 50 psi (0.35 MPa,
3.5 bar) Maximum Inlet Fluid Pressure and
10 psi (0.07 MPa, 0.7 bar) Maximum Inlet Air
Pressure. Higher pressures can cause parts to
rupture and result in serious injury or property
damage.
Turbine spray gun fluid sets range in size to provide
different fluid flow rates. Selection charts on page 8
show recommended combinations based on fluid
viscosities, flow rates, and usage.
As a general guideline, use fluid nozzle that will give
required flow with needle fully triggered at lowest fluid
pressure.
For low flow rates or light viscosity fluid, select smaller
nozzle sizes.
For high flow rates or high viscosity fluid, select larger
nozzle sizes.
Graco offers six different fluid sets:
Fluid Set Part Number Orifice Size (inch)
#2 244123 0.032
#3 244124 0.051
#4 244125 0.071
#5 244126 0.087
#6 244127 0.098
#7 244128 0.115

8 309205
Setup
Contractor Fluid Set Chart
Use this chart to determine Fluid Set for specific contractor application. Fig. 10.
Fig. 10
Installing the Fluid Set
CAUTION
Trigger the gun whenever you tighten or remove
the nozzle. This keeps the needle seat away from
the nozzle seating surface and prevents the seat
from being scratched.
Complete spray guns are available with a #3 fluid set.
To install other fluid sets, perform the following steps.
See Fig. 11.
1. Use your hand to loosen and remove the air cap
retaining ring (13) and the air cap housing (15).
2. While triggering the gun, use your hand to loosen
and remove the nozzle (14a) from the gun.
3. Use your hand to loosen and remove the fluid
knob assembly (21) and compression spring (23)
from back of gun and remove the old needle.
4. Insert the needle assembly (14b) into the back of
the gun. Replace the nozzle (14a) air cap housing
(15) and air cap retaining ring and tighten by hand.
NOTE: O–ring (4) should always be on the nozzle.
Fig. 11
13
15 14a
21
23
14b
4TI0816

309205 9
Setup
Preparing to Spray
Paint Reduction — Industrial or Domestic
Coatings
Reduce and catalyze all paint to manufacturer’s
specifications. If no reductions are given, first
thoroughly mix fluid to be sprayed. Gradually mix in
reducer, testing fluid for correct spraying consistency.
Test consistency, remove stir stick from thinned paint.
Consistency is right when first drops from stir stick are
about one second apart.
Prepare the Surface
To achieve proper adhesion, make sure the surface to
be sprayed is completely clean.

10 309205
Setup
Turbine Spray Unit (for more information
see manual 309241)
Connect the Fluid and Air Supply
NOTES:
DThe HVLP Cart/Compressor provides the air supply
for the remote pressure pot.
DCircled letters in Fig. 12 indicate hose line connec-
tions.
1. Connect gun air supply hose (A) between turbine
air outlet (B) and gun air inlet (C). DO NOT use
wrench to tighten connections; hand tighten only.
See Fig. 12.
2. If using a spray gun cup (D):
Connect cup to gun fluid inlet (E).
If using accessory remote pressure pots (F):
Connect fluid supply hose (G) between remote
pressure pot fluid outlet (H) and gun fluid inlet (E),
or connect pressure pot air hose (J) between
pressure pot air regulator inlet (K) and the cart
compressor air outlet (L).
Fig. 12 8068A
C
D
F
J
J
A
G
G
G
C
A
B
L
E
E
Z
Z
HH
F
K
K
Y
XX
Y
Y
Z
X
21/2-gallon remote pressure pot2-quart remote pressure pot
cup setup
for spray gun

309205 11
Setup
Fill Cup or Remote Pressure Pot
Spray Gun Cup
WARNING
The spray gun cup is pressurized by the gun’s air
supply. To reduce the risk of serious injury from
pressurized fluid or accidental spray from the gun,
always turn off the air supply to the gun before
removing the spray gun cup.
Fill cup 3/4 full to keep air pressure tube clean. Install
cover. Latch the under-cup cover (H) to secure it to
cup.
NOTE: Strainer may be removed for high viscosity
applications which may plug strainer.
Fig. 13
H
Accessory Remote Pressure Pot
WARNING
The accessory remote pressure pots remain pres-
surized until pressure is manually relieved. To
reduce the risk of serious injury from pressurized
fluid or accidental spray from the gun, always
relieve pressure in the pressure pot before loosen-
ing or removing the cover.
Pressure Relief Procedure
1. Relieve remote pressure pot pressure as follows
(see Fig. 14):
a. Turn off air supply to pressure pot.
b. 21/2-gallon remote pressure pot:
Pull pressure relief valve ring (206c) until
pressure is completely relieved.
2-quart remote pressure pot:
Turn out pressure relief knob (113) one turn.
Wait until pressure is completely relieved
before removing cover. Close knob.
02882A
Fig.
14
206c
113
2 quart
8069A
21/2gallon
2. Remove pressure pot cover and fill. Secure cover.
NOTE: 2-quart remote pressure pot only:
Lightly coat cover threads with petroleum jelly.
CAUTION
If the 2-quart remote pressure pot is accidentally
tipped over or held at too great of an angle, fluid
may leak into the air regulator and cause damage.
Take precautions to avoid this. If fluid does get into
the regulator, clean immediately.
CAUTION
Do not tighten the pressure pot cover more than
hand-tight. Excessive tightening may damage the
cover gasket.

12 309205
Spraying Techniques
General Spraying Techniques
DSelect proper fluid set. To determine correct fluid
set see charts on page 8.
DWhen fluid is first applied, start with fluid valve and
maximum air and the knob set to the FAN spray
pattern position. Then adjust as needed. See Fig. 8
for pattern size adjustment.
DKeep gun perpendicular to surface and maintain
consistent distance of approximately 6 to 8 inches
(150 to 200 mm) from object being sprayed.
See Fig. 15.
DAlways have spray gun in motion before triggering.
Move spray gun across workpiece in straight,
smooth, stroke. Maintaining speed and distance.
Release trigger at end of stroke.
DTo obtain even finish, overlap previous strokes
by 50%.
DApply full, wet coat whenever possible.
Automotive Spraying Techniques
DWhen blending spots, work from outside in.
DTwo 20-foot (6.1 m) hoses are recommended when
applying automotive finish coats. Additional hose
allows air to cool for better flow.
WRONG 0793
RIGHT 0793
6 to 8 in.
(150 to 200 mm)
Fig. 15

309205 13
Spraying Techniques
Swivel Tube Adjustment
The adjustable swivel tube allows the HVLP–Turbine
Gun to be held in any position why spraying. To adjust
the position of the tube in the cup:
1. Loosen the nut (A) with a wrench (42).
2. Rotate the cup to the desired spray position.
3. Retighten the nut (A) with a wrench (42).
Fig. 16
A
Cup
A
Cup
Swivel tube positioned for spraying UPSwivel tube positioned for spraying DOWN
TI0804
Swivel tube Swivel tube
Converting the HVLP Turbine Cup Feed
Gun to Pressure Feed (Parts, page 22).
1. Using a pair of pliers, remove air pressure tube
(30b) from air stem (31).
2. Hold adapter fitting (28) with wrench. Remove cup
assembly.
3. Remove air stem (31) from gun body (1).
4. Apply medium strength thread locker to set screw
(36) and assemble into gun body (1).
NOTE: To convert from pressure feed cup to cup
feed, reverse these instructions.

14 309205
Maintenance
Cleaning the Spray Gun
1. Clean gun and cup by hand with compatible
solvent or place them in gun washer with trigger
held open; cycle washer as necessary to clean
gun.
2. Remove air cap retaining ring (13), air cap (15),
nozzle (14a) and o–ring (4). See Fig. 17.
3. Trigger gun while using you hand to remove the
fluid nozzle (14a). See Fig. 17.
CAUTION
Trigger the gun whenever you tighten or remove
the nozzle. This keeps the needle seat away from
the nozzle seating surface and prevents the seat
from being scratched.
Fig. 17
TI0884
T
13
15
Gun
14a
4
4. Clean the air cap retaining ring, air cap, and fluid
nozzle with water or solvent.
5. Dip the end of a soft-bristle brush into a compatible
solvent. Do not continuously soak the brush’s
bristles with solvent and do not use a wire brush.
Fig. 18 02007
6. With the gun pointed down, clean the front of the
gun, using the soft-bristle brush and solvent.
Fig. 19 TI0817
7. Scrub the air cap retaining ring, air cap, and fluid
nozzle with the soft-bristle brush. To clean out air
cap holes, use a soft implement, such as a tooth-
pick, to avoid damaging critical surfaces. Clean the
air cap and fluid nozzle daily, minimum. Some
applications require more frequent cleaning. Do
not soak the air cap retaining ring in solvent for
prolonged periods of time.
Fig. 20 TI0813

309205 15
Maintenance
8. Trigger gun while hand tightening the fluid nozzle
(14a).
9. Install air cap (15) and retaining ring (13).
10. Dampen a soft cloth with solvent. Wring out the
excess. Point the gun down and wipe off the
outside of the gun.
Fig. 21
TI0818
11. Lubricate gun after cleaning it as instructed on
page 17.
CAUTION
Solvent left in gun air passages could result in a poor quality paint finish. Do not use any cleaning method which
may allow solvent into the gun air passages.
02055
02027
Do not immerse the gun in solvent.
Do not wipe the gun with a cloth soaked in
solvent; ring out the excess.
Do not point the gun up while cleaning it.
Do not use metal tools to clean the air cap
holes as this may scratch them; scratches can
distort the spray pattern.
07041A
TI0818

16 309205
Maintenance
Flushing the Spray Gun Using a Remote
Pressure Pot
NOTES:
DCheck for any fluid leakage from gun and fluid
hoses. Tighten fittings or replace equipment as
needed.
DFlush gun before you change colors and when you
are finished spraying.
CAUTION
Clean all parts with a solvent compatible with the
fluid being sprayed and compatible with the spray
gun and cup or accessory remote pressure pot
wetted parts. See Technical Data on page 21.
1. Turn off air supply to gun.
2. Follow the pressure relief procedure described on
page 11.
3. Fill pressure pot with water or a compatible
solvent.
4. Flush spray gun, using compressor air only. Point
gun down into container and flush until solvent
runs clean.
5. Relieve pressure pot pressure, following the
pressure relief procedure described on page 11.
6. Disconnect air and fluid hoses from gun.
7. Clean and lubricate gun as instructed starting on
page 14.
Flushing the Spray Gun and Cup
1. Turn off air supply to gun.
2. Unlatch cup cover, and remove cup from cover.
3. Turn the pattern selection knob (A) to RND to
create a round pattern. Turn air control valve (B)
half open to reduce solvent mist.
4. Fill empty cup with about 11/2inches (38 mm) of
compatible solvent, and reinstall cup. Be sure
cover is secured.
5. Turn on air to gun.
6. Point gun down into and ground against container
and flush until solvent runs clean. See Fig. 22.
Fig. 22
7. Turn off air to gun.
8. Disconnect air supply and remove cup from gun.
Clean and lubricate gun as instructed on pages 14
and 17.

309205 17
Service
Lubricating the Spray Gun
After cleaning or servicing gun, lubricate parts
indicated in Fig. 23 with silicone-free spray gun
lubricant or similar material.
DAll threaded areas (A)
DTrigger screws (B)
DTrigger axle (C)
DFluid needle assembly (D) (see #16, Parts, page
22)
Fig. 23
B
A
TI0883
C
A
D
Replacing the Needle
WARNING
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury, follow the
Pressure Relief Procedure on page 11 before
checking or repairing any part of the gun or sys-
tem.
1. Relieve the pressure.
CAUTION
Trigger the gun whenever you tighten or remove the
nozzle. This keeps the needle seat away from the
nozzle seating surface and prevents the seat from
being scratched.
2. Remove the fluid adjustment knob (21) and fluid
spring (23).
3. Pull the fluid needle assembly (16) out the back of
the gun.
4. Check the fluid needle (16) for damage or exces-
sive wear. Replace needle if necessary.
5. Insert the fluid needle assembly (16) into the back
of the gun.
6. Tighten the packing screw (8). The needle (16)
must move freely.
NOTE: To ensure proper alignment of the parts, follow
the next steps in the order they are given.
7. Lubricate and install the fluid needle (16).
8. Lubricate the fluid adjustment knob threads (21),
and install the fluid spring (23) and adjustment
knob.
9. Trigger the gun to test the needle movement. If the
needle does not return after the trigger is released
or is slow in returning, loosen the packing screw
(8) slightly until the needle returns freely.
10. Make sure the gun fluid packings are sealing
properly by spraying solvent at low pressure
before fully pressurizing the gun with the fluid to be
sprayed.
If the fluid packings leak, tighten the packing screw
(8) slightly and retest until the packings and needle
seal completely.

18 309205
Service
Replacing the Air Valve (243840)
The air valve (25) cannot be repaired. If it is damaged,
the entire piece must be replaced.
To remove the air valve, use a screwdriver to gently
push the valve back about 0.25”, then gently pull it out
of the back of the gun. Insert the new air valve, twist
counter–clockwise (approximately one–half turn) until it
is securely seated in the back of the gun. Fig. 24.
Fig. 24
Replacing the Duckbill Valve (Kit –
244135)
If the duckbill valve is worn or broken, replace it with a
new one immediately. To replace the duckbill valve:
1. Lift the cover away from the cup.
2. Using a screwdriver, slightly pull the worn duckbill
valve and o–ring out of the lid.
3. Put the o–ring on the new duckbill valve.
4. Press the new duckbill valve and o–ring onto the
lid.
Fig. 25
Duckbill valve
TI0810
Replacing the Cup Gasket (Kit – 240625)
If the gasket is worn or swelled, replace it with a new
one immediately. To replace the cup gasket:
1. Lift the cover away from the cup.
2. Remove the worn gasket.
3. Press a new gasket into the lid slot.
Fig. 26
Cup Gasket

309205 19
Troubleshooting
Spray Finish Problems
PROBLEM CAUSE SOLUTION
Orange peel finish — Paint
surface not smooth
Paint droplets too large DMaintain proper spraying distance.
See page 12.
DKeep the turbine air filters clean to
allow full air flow.
DDo not use an air hose that is too
long to provide sufficient
atomization pressure.
DIf droplets are still too large, reduce
the fluid.
Paint droplets drying too fast to
properly flow out of gun
Keep the object being sprayed out of
direct sunlight. When spraying in
warmer temperatures, use a slower
evaporating solvent or a retarder.
Cold weather spraying Keep the fluid and the object being
sprayed as close to room temperature
as possible. When sprayed on a cold
surface, most paints will become too
thick to flow properly.
Blushing — Clear coatings
appear milky
Moisture condensation is trapped in
the lacquer when spraying in hot,
humid conditions
DAllow the turbine to warm up a few
minutes before spraying.
DStore the lacquer off concrete
floors, at room temperature.
DApply lighter coats and allow for
proper drying time.
DUse a slower evaporating solvent
or retarder.
DDo not spray in windy conditions.
Fish eyes — Small pools on
painted surface that will not
fill
Silicone contamination from lubricants,
grease, polish, or waxes on the
surface being sprayed
Clean all parts with a cleaning solvent;
use a solvent rag and a clean rag to
wipe with. Replace rags as needed. If
the problem persists, use a fish eye
eliminator.
Runs and sags Applying too much paint per pass for
the drying conditions
DMove the gun faster or decrease
the fluid flow.
DMaintain proper spraying distance.
See page 12.
DReduce the amount of thinner or
use a faster drying thinner.
Solvent pops or bubbles Sprayed surface drying before solvent
gas can be released
DApply fluid in lighter coats to allow
for proper evaporation.
DUse the recommended thinners.
DFollow the solutions, above, for
Orange peel finish — Paint droplets
too large.

20 309205
Troubleshooting
Spray Gun Problems
PROBLEM CAUSE SOLUTION
No or slow fluid flow,
intermittent spray, or
fluttering spray
Wrong size fluid set being used or the
o–ring on nozzle is missing
Select the proper fluid set for the fluid
being sprayed (see page 8) or put an
o–ring on the nozzle.
Gun fluid nozzle blocked by dried
paint, or damaged
Clean or replace fluid nozzle.
Cup or pressure pot cover not tight
enough, or gasket damaged
Tighten cover or replace gasket.
Cup or pressure pot fluid tube blocked
by dried paint or damaged
Clean or replace fluid tube.
Air flow to cup blocked To check, remove the cup (leave cover
connected), trigger the gun and check
for air flow out of the duckbill valve. If
air is not flowing freely, clean or
replace the duckbill valve.
Needle packings not properly adjusted
NOTE: Fluid loss though the packings
affects fluid pressure and causes a
fluid leak from the gun body.
Clean the gun body with solvent and
the brush provided. Adjust the needle
packings.
Plugged inlet strainer Replace strainer if plugged or remove
strainer if material is highly viscous.
Fluid leaks at fluid nozzle
after the trigger is released
Needle not seating in fluid nozzle Check for a loose fluid nozzle or a
bent nozzle or needle; tighten the
nozzle or replace parts as needed.
Poor spray pattern Air cap horn holes and/or fluid nozzle
plugged
Soak air cap and/or fluid nozzle in
solvent. Clean air cap horn holes with
non-metallic item to avoid permanently
damaging them. See page 14.