Graco PerformAA 26B570 User manual

Instructions - Parts
Air assist spray guns for fine finish application of various solventborne and waterborne
paints and coatings. For professional use only.
4000 psi (28 MPa, 280 bar) maximum working fluid pressure.
100 psi (0.7 MPa, 7 bar) maximum working air pressure.
See page 3 for model information.
Important Safety Instructions
Read all warnings and instructions in this
manual before using the equipment.
Save these instructions.
Important Medical Information
Read the medical alert card provided with
the gun. It contains injection injury
treatment information for a doctor. Keep it
with you when operating the equipment.
3A8553A
EN
PerformAA™Auto Air
Assist Spray Guns
TI8087b
Model 26B570 Spray Gun
shown mounted on Model
288217 Manifold
II 2 G Ex h IIB T6 Gb

2 3A8553A
Contents
Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Ventilate the Spray Booth . . . . . . . . . . . . . . . . . . 6
Configure Gun and Manifold . . . . . . . . . . . . . . . . 6
Install Air Fittings . . . . . . . . . . . . . . . . . . . . . . . . . 7
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mount Gun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Connect Air Line . . . . . . . . . . . . . . . . . . . . . . . . . 9
Connect Fluid Hose . . . . . . . . . . . . . . . . . . . . . . 10
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Flush Before Using . . . . . . . . . . . . . . . . . . . . . . 11
Select a Spray Tip and Air Cap . . . . . . . . . . . . . 11
Install a Spray Tip . . . . . . . . . . . . . . . . . . . . . . . 11
Position the Air Cap . . . . . . . . . . . . . . . . . . . . . . 11
Air Cap Alignment Pin . . . . . . . . . . . . . . . . . . . . 12
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Pressure Relief Procedure. . . . . . . . . . . . . . . . . 13
Adjust the Spray Pattern . . . . . . . . . . . . . . . . . . 13
Spray Finishing Application . . . . . . . . . . . . . . . . 14
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Daily Gun Care . . . . . . . . . . . . . . . . . . . . . . . . . 16
General System Maintenance . . . . . . . . . . . . . . 16
Flushing and Cleaning . . . . . . . . . . . . . . . . . . . . 16
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
General Troubleshooting . . . . . . . . . . . . . . . . . . 19
Spray Pattern Troubleshooting. . . . . . . . . . . . . . 21
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Diffuser Seat Replacement. . . . . . . . . . . . . . . . . 24
Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Compatible Air Assist Manifolds. . . . . . . . . . . . . . 27
Spray Tip Selection Charts . . . . . . . . . . . . . . . . . . 31
Air Cap Selection Chart . . . . . . . . . . . . . . . . . . . . . 35
Kits and Accessories . . . . . . . . . . . . . . . . . . . . . . . 36
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Mounting Hole Layout . . . . . . . . . . . . . . . . . . . . . . 39
Manifolds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Technical Specifications . . . . . . . . . . . . . . . . . . . . 45
California Proposition 65 . . . . . . . . . . . . . . . . . . . . 46
Air Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 48

Models
3A8553A 3
Models
PerformAA Auto Air Assist
Models
Gun includes carbide seat and ball, indexing air cap,
and choice of AXP spray tip (unless otherwise noted).
A manifold is required to install and operate the spray
gun. Manifolds are sold separately. See Gun
Manifolds, page 37.
Model Air Cap Air Cap Part No.
26B570 General Finishing
(GF) 2GF042
26B571 Lacquer (WL) 2WL042
26B572* General Finishing
(GF) 2GF042
26B573‡ Reverse-A-Clean®
(RAC) 249478
26B574 Low Viscosity (LV) 2LV042
26B575 Waterborne (WB) 2WB042
26B576 Quick Drying (QD) 2QD042
26B577 High Viscosity (HV) 2HV042
*Gun with a plastic seat, SST ball; designed to
handle low viscosity, non-abrasive or acid-catalyzed
material.
‡ Includes choice of LTX or FFLP Reverse-a-Clean
(RAC) Spray Tip.

Warnings
4 3A8553A
Warnings
The following are general warnings related to the setup, use, grounding, maintenance, and repair of this equipment.
Additional, more specific warnings may be found throughout the body of this manual where applicable. Symbols that
appear in the body of the manual refer to these general warnings. When these symbols appear throughout the
manual, refer back to these pages for a description of the specific hazard.
WARNING
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. Paint or
solvent flowing through the equipment can cause static sparking. To help prevent fire and explosion:
• Use equipment only in well-ventilated area.
• Eliminateall ignition sources;suchas pilot lights,cigarettes, portable electriclamps,and plastic drop
cloths (potential static sparking).
• Ground all equipment in the work area. See Grounding, instructions.
• Never spray or flush solvent at high pressure.
• Keep work area free of debris, including solvent, rags and gasoline.
• Do not plug or unplug power cords, or turn power or light switches on or off when flammable fumes
are present.
• Use only grounded hoses.
• Hold gun firmly to side of grounded pail when triggering into pail. Do not use pail liners unless they
are anti-static or conductive.
•Stopoperationimmediatelyifstaticsparkingoccursoryoufeelashock.Donotuseequipmentuntil
you identify and correct the problem.
• Keep a working fire extinguisher in the work area.
SKIN INJECTION HAZARD
High-pressure fluid from dispensing device, hose leaks, or ruptured components will pierce skin. This
may look like just a cut, but it is a serious injury that can result in amputation. Get immediate surgical
treatment.
• Do not point dispensing device at anyone or at any part of the body.
• Do not put your hand over the fluid outlet.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Followthe Pressure Relief Procedure,when youstopdispensing andbefore cleaning,checking, or
servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses and couplings daily. Replace worn or damaged parts immediately.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or
swallowed.
• Read Safety Data Sheets (SDSs) to know the specific hazards of the fluids you are using.
• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.

Warnings
3A8553A 5
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not exceed the maximum working pressure or temperature rating of the lowest rated system
component. See Technical Specifications in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical
Specifications in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For
complete information about your material, request Safety Data Sheets (SDSs) from distributor or
retailer.
• Turn off all equipment and follow the Pressure Relief Procedure, when equipment is not in use.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine
manufacturer’s replacement parts only.
• Donot alterormodify equipment.Alterations ormodificationsmay voidagency approvalsandcreate
safety hazards.
• Make sure all equipment is rated and approved for the environment in which you are using it.
• Use equipment only for its intended purpose. Call your distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when in the work area to help prevent serious injury, including
eye injury, hearing loss, inhalation of toxic fumes, and burns. Protective equipment includes but is not
limited to:
• Protective eyewear, and hearing protection.
• Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer.
WARNING

Installation
6 3A8553A
Installation
Ventilate the Spray Booth
The spray booth must have a ventilation system.
Electrically interlock the gun fluid supply with the
ventilators to prevent gun operation any time that the
ventilation air flow falls below minimum values. Check
and follow all local codes and regulations regarding air
exhaust velocity requirements. Verify the operation of
the interlock at least once a year.
Configure Gun and Manifold
The gun is supplied with an internal fluid plug and seals
(5, 6, 7). To use the gun in a circulating system, remove
the internal plug. In a non-circulating system, leave the
plug in place to minimize flush time.
Circulating System
1. Apply anti-seize lubricant 222955 to the threads and
mating faces of the manifold (101) and the elbows
(107), supplied unassembled.
2. Install the elbows (107) in both fluid ports of the
manifold (101).
3. Connect the fluid supply hose to one elbow and the
fluid return hose to the other. The manifold fluid
ports are reversible.
4. Install the gun on the manifold, using the four
screws (17). Start the threads of all four screws, and
tighten the front two screws first, and then tighten
the back two screws to 65 in-lb (7.3 N•m).
Non-circulating System
1. See FIG. 1. Apply anti-seize lubricant 222955 to the
threads and mating faces of the manifold (101), plug
(109), and elbow (107), supplied unassembled.
2. Install an elbow (107) in one fluid port of the
manifold (101), and a plug (109) in the other port.
3. Install the internal plug (5) in the gun fluid port on
the same side as the manifold plug.
4. Connect the fluid supply hose to the manifold elbow
(107).
5. Install the gun on the manifold, using the four
screws (17). Start the threads of all four screws, and
tighten the front two screws first, and then tighten
the back two screws to 65 in-lb (7.3 N•m).
Do not operate the gun unless ventilating air flow is
above the minimum required value. Provide fresh air
ventilation to avoid the buildup of flammable or toxic
vapors when spraying, flushing, or cleaning the gun.
Interlock the gun fluid supply to prevent operation
unless ventilating air flow is above the minimum
required value.
FIG. 1: Non-Circulating Setup Shown (cutaway view)
Remove when used in circulating systems.
1
Replace with a reducing nipple (107) when used in circulating
systems.
2
Install optional filter in fluid inlet port. See Kits and
Accessories, page 37.
3
5
101
107
109
TI8587b
1
2
3
7
6

Installation
3A8553A 7
Install Air Fittings
1. Install the supplied 1/4 in. (6 mm) tube fitting into the
cylinder (CYL) air port.
2. Install 3/8 in. (8 mm) tube fittings into the atomiza-
tion (ATOM) air port and the fan (FAN) air port.
Grounding
The following grounding instructions are minimum
requirements for a system. Your system may include
other equipment or objects that must be grounded.
Check your local electrical code for detailed grounding
instructions for your area and type of equipment. Your
system must be connected to a true earth ground.
Spray Gun: Ground the spray gun by mounting it to a
grounded mount, such as a reciprocator, robot, or
stationary support, and connect it to a properly
grounded fluid hose and pump.
Pump: Ground the pump by connecting a ground wire
and clamp between the pump and a true earth ground
as instructed in your separate pump instruction manual.
Air Compressors and Hydraulic Power Supplies:
Ground air compressors and hydraulic power supplies
according to the manufacturer recommendations.
Air, Fluid, and Hydraulic Hoses Connected To
Pump: Use only electrically conductive hoses with a
maximum of 100 ft (30.5 m) combined hose length to
ensure grounding continuity. Check the electrical
resistance of your air and fluid hoses at least once a
week. If the total resistance to ground exceeds 25
megohms, replace the hose immediately. Use a meter
that is capable of measuring resistance at this level.
Fluid Supply Container: Ground the fluid supply
container according to local code.
Object Being Sprayed: Ground the object that is being
sprayed according to local code.
Solvent Pails: Ground all solvent pails that are used
when flushing according to local code. Use only metal
pails, which are conductive. Do not place the pail on a
non-conductive surface, such as paper or cardboard,
which interrupts the grounding continuity.
FIG. 2: Air fittings installation
The equipment must be grounded to reduce the risk
of static sparking. Static sparking can cause fumes to
ignite or explode. Grounding provides an escape wire
for the electric current.
CYL
ATOM
FAN TI8211a

Installation
8 3A8553A
Mount Gun
Reciprocating Arm Rod Mount
To mount the gun on a reciprocating arm rod [0.5 in. (13
mm) diameter maximum]:
1. Insert the mounting bar (A) through the hole in the
manifold as shown in FIG. 3.
NOTE: Use the 1/8 in. alignment pin (P) to assist in
orienting the gun.
2. Secure the gun to the bar by tightening the
mounting screw (B).
Stationary Support
To mount the gun on a stationary support (refer to FIG.
4. and to Mounting Hole Layout, page 40):
1. Align the manifold with the alignment pins. Locate
alignment pins and holes per the Mounting Hole
Layout illustration, page 40.
2. Secure the gun to the support with two M5 x 0.8
capscrews (S). The screws must be long enough to
engage the threaded holes in the gun manifold to a
depth of 1/4 in. (6 mm).
Retrofit Adapter Plate
The retrofit adapter plate enables the manifold to be
attached to a variety of bolt patterns.
To mount the gun using the retrofit adapter plate (kit
288197):
1. Mount adapter plate to manifold using the three
screws provided with the kit (FIG. 5).
2. Bolt plate to mounting surface using four M5 x 0.8
capscrews. Refer to the Mounting Hole Layout,
page 40.
FIG. 3: Reciprocating Arm Mount
B
ATI8120a
P
FIG. 4: Stationary Support Mount
FIG. 5: Retrofit Adapter Plate
STI8121a
TI8180a

Installation
3A8553A 9
Connect Air Line
1. Install an air/water separator and an air line filter to
ensure a clean, dry air supply to the gun. Dirt and
moisture in the line can ruin the appearance of your
finished piece.
2. Install an air pressure regulator on each gun air
supply line.
3. For manifolds with separate fan and atomization
ports, the gun cylinder, fan, and atomization air
must be supplied and regulated separately. For
adjustable manifolds with a manual valve, only one
supply line is required for both atomization and fan
air.
NOTE: A minimum of 50 psi (0.34 MPa, 3.4 bar) air
pressure must be supplied to the cylinder for proper
operation. Set the atomization air as needed for
complete atomization of the entire pattern. The tip size
is the primary controller of the pattern size. Use the fan
air only as needed to slightly adjust the pattern size.
4. Install a bleed-type master air shutoff valve on the
main air line. Install an additional bleed-type valve
on each pump air supply line, downstream of the
pump air regulator, to relieve air trapped between
this valve and the pump after the air regulator is
shut off.
5. Install a bleed-type air shutoff valve on each gun air
supply line, downstream of the gun air regulator, to
shut off air to the gun.
6. For manifolds with separate fan and atomization
ports, connect a separate air supply line to the gun
atomizing air inlet (D) and cylinder air inlet (C).
Connect an air supply line to the fan air inlet (E) if
desired. See FIG. 6. For manifolds with a manual fan
valve, only one supply line is required for both
atomization and fan air.
NOTE: The gun atomizing and fan air inlets are 3/8 in.
(9.5 mm) O.D. tubing compatible. The cylinder air inlet
accepts 1/4 in. (6.3 mm) O.D. tubing.
Trapped air can cause the gun to spray unexpectedly,
which could result in serious injury including splashing
fluid in the eyes or on the skin. Install bleed-type air
shutoff valves.

Installation
10 3A8553A
Connect Fluid Hose
NOTE: A fluid drain valve(s) is required in your system
to assist in relieving fluid pressure in the displacement
pump, hose and gun; triggering the gun to relieve
pressure may not be sufficient.
NOTE: A fluid pressure regulator must be installed in
the system if the pump's maximum working pressure
exceeds the gun's maximum fluid working pressure (see
the front cover).
Before connecting the fluid hose, blow it out with air and
flush it with solvent. Use solvent that is compatible with
the fluid to be sprayed.
1. Install a fluid filter and drain valve(s) close to the
pump's fluid outlet.
2. Install a fluid pressure regulator to control fluid
pressure to the gun.
NOTE: Some applications require fine-tuned control of
fluid pressure. You can control fluid pressure more
accurately with a fluid pressure regulator than by
regulating the air pressure to the pump.
3. Install a fluid shutoff valve to shut off the fluid supply
to the gun.
4. Install an in-line fluid filter on the gun fluid inlet (F) to
avoid clogging the spray tip with particles from the
fluid. See FIG. 6.
5. In a circulating system, connect a grounded fluid
supply hose to the gun fluid fitting. Connect a
grounded return hose to the other port.
In a non-circulating system, remove the gun fluid
outlet fitting (G) and plug the outlet port with the pipe
plug (109) supplied.
FAN ATOM
CYL
Cylinder Air Inlet: accepts 1/4 in. (6.3 mm) O.D. tubing
Atomization Air Inlet: 1/4-18.6 npsm
Fan Air Inlet: 1/4-18.6 npsm
Fluid Inlet: 1/4-18 nptf or #5 JIC (1/2-20 unf)
Fluid Outlet (circulating gun only): 1/4-18 nptf or #5 JIC
(1/2-20 unf)
KEY
C
D
E
F
G
CF (or G)
G (or F)
ED
TI8113a
FIG. 6: Side Mounted Air Assist Manifold Ports

Setup
3A8553A 11
Setup
Flush Before Using
The equipment was tested with lightweight oil, which is
left in the fluid passages to protect parts. To avoid
contaminating your fluid with oil, flush the equipment
with a compatible solvent before using the equipment.
See Flushing and Cleaning, page 16.
Follow the Pressure Relief Procedure, page 14.
Select a Spray Tip and Air Cap
The fluid flow and pattern width depend on the size of
the spray tip, the fluid viscosity, and the fluid pressure.
See Spray Tip Selection Charts, page 32. Contact
your Graco distributor for assistance in selecting an
appropriate spray tip for your application.
Install a Spray Tip and Air Cap
1. Follow the Pressure Relief Procedure, 14.
2. Install a spray tip in the gun. Align tip locating tab
with slot on the air cap.
3. Rotate the air cap to a horizontal, vertical, or angled
spray pattern.
NOTE: Manually adjust angled spray patterns to
approximate position before using the optional Air Cap
Alignment Tool.
TI6558A
Vertical Spray
Pattern
(factory-set)
Horizontal
Spray Pattern
4. Tighten the air cap retaining ring (8) firmly by hand
to ensure a proper seal between the tip gasket and
the diffuser (10).
Optional: Use an Air Cap Alignment Tool to quickly set
the spray pattern to an exact angle. See Air Cap
Alignment Tool Procedure, page 12.
To avoid serious injury from skin injection, do not put
your hand in front of the spray tip when installing or
removing the spray tip and tip guard.
FIG. 7: Spray tip and air cap setup
FIG. 8: Spray pattern positions
TI6847A
Tip Locating Tab
Slot

Setup
12 3A8553A
Air Cap Alignment Tool
Procedure
Use an alignment tool (26B736) to quickly set exact
spray pattern angles.
NOTE: The alignment tool is sold separately.
1. Place the alignment tool onto the tightened retaining
ring (8).
2. Rotate the alignment tool to the desired angled
spray pattern position.
3. Remove the alignment tool.
Air Cap Alignment Pin
Air caps are factory-set with an air cap alignment pin to
position the air cap. The standard location of the air cap
alignment pin is the vertical spray pattern.
To change the spray pattern direction, use a needle
nose pliers to unscrew the pin and relocate it to the
desired position. See FIG. 11. When relocating the pin
use low-strength thread locker. Torque to 1.5-2.5 in-lb
(0.2-0.3 N•m). Do not overtighten.
TI6847A
Horizontal
Air Cap Position
(standard)
Vertical
Air Cap Position
FIG. 9: Alignment tool on an air cap in the vertical
position (0°)
FIG. 10: 160° angled spray pattern
FIG. 11: Air cap alignment pin positions

Setup
3A8553A 13
Reverse-A-Clean® (RAC) Spray
Tip Setup
Convert any air assist gun models to a RAC gun model
with RAC Conversion Kit 287917. See Kits and
Accessories, page 37.
NOTE: Replace the seat and gasket part as needed.
See RAC Spray Tip Assembly and Kits, page 35.
1. Follow the Pressure Relief Procedure, page 14.
2. Insert the RAC housing (11) into the tip guard (46).
3. Insert the tip gasket seat assembly (9a).
4. Screw the guard (46) onto the gun, and tighten
firmly by hand.
5. Insert the RAC SwitchTip (9).
46
11
9a
46
9

Operation
14 3A8553A
Operation
Pressure Relief Procedure
Follow the Pressure Relief Procedure whenever
you see this symbol.
1. Turn off the air and fluid supply to the gun.
2. Close the bleed-type master air valve (required in
the system).
3. Hold a metal part of the gun firmly to a grounded
metal pail. Trigger the gun to relieve pressure.
4. Open the pump drain valve (required in the system)
to relieve fluid pressure in the displacement pump.
In addition, open the drain valve connected to the
fluid pressure gauge (in a system with fluid
regulation) to relieve fluid pressure in the hose and
gun. Have a container ready to catch the drainage.
5. Leave the drain valve(s) open until you are ready to
spray again.
6. If you suspect that the spray tip or hose is
completely clogged or that pressure has not been
fully relieved:
a. Very slowly loosen the retaining ring or the hose
end coupling to relieve pressure gradually.
b. Loosen the coupling completely.
c. Clear the obstruction in the hose or tip.
Adjust the Spray Pattern
The air assist spray gun combines airless and air spray
concepts. The spray tip shapes the fluid into a fan
pattern, as does a conventional airless spray tip. Air
from the air cap further atomizes the fluid and completes
the atomization of the paint tails into the pattern to
produce a more uniform pattern.
The fan air can be used if necessary to slightly adjust
the pattern size.
NOTE: Air assist spray guns differ from air spray guns in
that increasing the fan air reduces the pattern width. To
increase the pattern width, use less fan air or a larger
size tip.
1. Set the fluid pressure at 300 psi (2.1 MPa, 21 bar)
with the fluid regulator.
2. Trigger the gun to check the atomization; do not be
concerned about the pattern shape yet.
3. Slowly Increase the fluid pressure just to the point
where a further increase in fluid pressure does not
significantly improve fluid atomization.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection and splashing
fluid, follow the Pressure Relief Procedure when you
stop spraying and before cleaning, checking, or
servicing the equipment.
FIG. 12: Pressure Relief
TI8174a
To avoid serious injury from skin injection, do not put
your hand in front of the spray tip when operating the
spray gun.

TI0792
No Pressure Too little
pressure Correct
amount of
pressure
Operation
3A8553A 15
4. Turn on the atomizing air and set the air pressure at
about 10 psi (70 kPa, 0.7 bar). Check the spray
pattern, and then adjust the air pressure until the
tails are completely atomized and pulled into the
spray pattern. See FIG. 13. Do not exceed 100 psi
(0.7 MPa, 7 bar) air pressure to the gun.
NOTE: For HVLP operation do not exceed 10 psi at the
air cap. Use HVLP verification kit 249140 to measure
the atomization pressure at the air cap.
5. Adjust the pattern width if desired.
For a narrower pattern, supply air to the gun fan air inlet
(or open the fan adjustment valve on adjustable
manifolds). The tip size is the primary controller of the
pattern size. Use the fan air only as needed to slightly
adjust the pattern size.
Spray Finishing Application
The spray gun has a built-in lead and lag operation.
When triggered, the gun begins emitting air before the
fluid is discharged. When the trigger actuation air is
stopped, the fluid stops before the air flow stops. This
helps assure the spray is atomized and prevents fluid
buildup on the air cap and tip.
Adjust the system control device, if it is automatic, so
the gun starts spraying just before meeting the work
piece and stops as soon as the work piece has passed.
Keep the gun a consistent distance, 8 to 10 inches (200
to 250 mm), from the surface of the object being
sprayed.
To achieve best results when applying fluid:
• Keep gun perpendicular and 8 to 10 inches (200 to
250mm) from object being sprayed.
• Use smooth, parallel strokes across surface to be
sprayed with 50% overlap. See FIG. 15.
Incorrect
Correct TI8098a
FIG. 13: Correct Spray Pattern
FIG. 14: Spray pattern widths
Wide pattern
(Standard) Narrow Pattern
FIG. 15: Correct Spray Method

Maintenance
16 3A8553A
Maintenance
Daily Gun Care
Follow the general system maintenance and flushing
and cleaning procedures daily.
General System Maintenance
1. Follow the Pressure Relief Procedure, page 14.
2. Clean the fluid and air line filters daily.
3. Check for any fluid leakage from the gun and fluid
hoses. Tighten fittings or replace equipment as
needed.
4. Flush the gun before changing colors and whenever
you are done operating the gun.
Flushing and Cleaning
This gun is not adjustable. To ensure proper shutoff,
tighten the piston cap (27) onto the housing (1) until it
bottoms out.
• Flush before changing colors, before fluid can dry in
the equipment, at the end of the day, before storing,
and before repairing equipment.
• Flush at the lowest pressure possible. Check
connectors for leaks and tighten as necessary.
• Flush with a fluid that is compatible with the fluid
being dispensed and the equipment wetted parts.
• Clean the front of the tip frequently during the day to
reduce buildup.
To reduce the risk of an injury, follow the Pressure
Relief Procedure, page 14, whenever you are
instructed to relieve the pressure.
NOTICE
Methylene chloride with formic or propionic acid is not
recommended as a flushing or cleaning solvent with
this gun as it will damage aluminum and nylon
components.
To reduce the risk of an injury, follow the Pressure
Relief Procedure, page 14, whenever you are
instructed to relieve the pressure.
To avoid fire and explosion, always ground equipment
and waste container. Maintain metal to metal contact
between the gun and the flushing pail. To avoid static
sparking and injury from splashing fluid, always
remove the spray tip and flush at the lowest possible
pressure.

Maintenance
3A8553A 17
NOTE: 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.
TI8174a
TI6570A
• Do not point gun up while cleaning.
• Do not wipe the gun with a cloth soaked in solvent;
wring out the excess.
• Do not immerse the gun in solvent.
• Do not use metal tools to clean the air cap holes;
this may scratch them. Scratches may distort the
spray pattern.
1. Follow the Pressure Relief Procedure, page 14.
2. Shut off the gun fan and atomizing air.
3. Remove the air cap retaining ring (8), air cap (30),
and spray tip (9).
4. Disconnect the fluid supply hose and air supply
hose from the gun.
5. Connect the solvent supply hose to the gun.
6. Point the gun down into a grounded metal container.
Hold a metal part of the gun firmly to the grounded
metal container. Increase the fluid pressure slowly.
Flush until clean solvent flows from the gun.
7. Turn off the solvent supply.
8. Follow the Pressure Relief Procedure, 14.
9. Disconnect the solvent supply hose from the gun.
10. 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.
11. With the gun pointed down, clean the front of the
gun, using the soft-bristle brush and solvent.
12. Scrub the air cap retaining ring (8), air cap (30), and
spray tip (9) with the soft-bristle brush. To clean out
air cap holes, use a soft tool, such as a toothpick, to
avoid damaging critical surfaces. Blow air through
the spray tip to ensure the orifice is clean. Clean the
air cap and spray tip daily, minimum. Some
applications require more frequent cleaning.
To avoid serious injury from skin injection, do not put
your hand in front of the spray tip when removing,
installing, or maintaining the air cap and spray tip.
TI4845A

Maintenance
18 3A8553A
13. Install the air cap retaining ring (8), air cap (30), and
spray tip (9).
14. Dampen a soft cloth with solvent and wring-out the
excess. Point the gun down and wipe off the outside
of the gun.
Clear a Clogged RAC Tip
9c
1. Rotate the tip 180 so the arrow on the tip cylinder
(9c) faces backward.
2. Trigger the gun into a grounded metal waste
container or onto the ground to remove the clog.
3. Rotate the tip 180 back to the spray position.
4. If the RAC tip is still clogged, then follow the
Pressure Relief Procedure, page 14, and remove
the spray tip for cleaning.

Troubleshooting
3A8553A 19
Troubleshooting
NOTE: Check all possible remedies in the
troubleshooting charts before disassembling the gun.
Some improper patterns are caused by the improper
balance between air and fluid. Refer to Spray Pattern
Troubleshooting, page 21.
General Troubleshooting
To reduce the risk of a skin injection injury, always
follow the Pressure Relief Procedure, page 14,
whenever instructed to relieve the pressure. To avoid
serious injury from skin injection, do not put your hand
in front of the spray tip when installing or removing the
air cap assembly and spray tip.
Problem Cause Solution
Fluid leakage through venting holes. Worn packings or needle. Replace needle assembly (14).
Air leakage through venting hole. Worn o-ring (23) or gasket (15). Check and replace parts as needed.
Air leakage from back of gun. Worn o-rings (22, 23). Replace o-rings.
Air does not trigger. Piston stem is disconnected from
main body of piston assembly (20). Replace piston assembly.
Air does not shut off. Piston assembly not seating
properly.
Broken return spring (29).
Swollen o-ring (22).
Worn piston stem o-rings (25, 26).
Bottom gasket (16) failed.
Clean/service piston assembly.
Replace worn or swollen o-rings.
Replace spring.
Replace o-rings.
Replace o-rings.
Replace gasket.
Fluid leakage from front of gun. Fluid needle (14) dirty, worn, or
damaged.
Dirty or worn diffuser-seat (10).
Clean or replace fluid needle.
Clean or replace diffuser-seat.
To improve sealing while spraying
lightweight materials and sealing life
while spraying acid catalyzed
materials, use optional SST ball and
plastic seat.
Fluid is present at air cap holes. Spray tip is leaking.
Diffuser-seat (10) is insufficiently
tightened.
Verify that retainer (8) or RAC air
cap assembly (30), are tight. If so,
replace spray tip (9).
Tighten diffuser-seat.

Troubleshooting
20 3A8553A
Fluid needle will not trigger. Loose or missing fluid needle stop
(21) or setscrew (19).
Broken fluid needle (14).
Air leaking around piston (20).
Swollen piston o-ring (22).
Insufficient air pressure on trigger.
Spray tip (9) is plugged.
Fluid filter is plugged.
Plug (5) is in incorrect fluid port.
Replace stop or tighten setscrew.
Replace fluid needle.
Replace o-ring (22) or piston
assembly (20).
Replace o-ring. Do not immerse
piston in solvent.
Increase air pressure or clean air
line.
Clean spray tip and air cap (30).
Clean or replace filter.
Move plug to fluid port consistent
with manifold plumbing, unless you
are using gun in a circulating
system. If you are, all fluid ports in
gun and on manifold should be
open.
Fluid does not shut off. Worn o-ring (25).
Piston cap (27) not fully tightened.
Spring (28) not in place.
Swollen piston o-ring (22).
Replace o-ring.
Tighten piston cap until it bottoms
out.
Check spring position.
Replace o-ring. Do not immerse
piston in solvent
Problem Cause Solution