Graco SaniForce 26C799 User manual

3A8816A
EN
Instructions
Hygienic SaniForce®
Automatic Airless
Spray Guns
For use in hygienic spraying applications for automatic airless systems. For professional
use only.
Model 26C799
600 psi (4.1 MPa, 41 bar) Maximum Working Fluid
Pressure
200 psi (1.4 MPa, 14 bar) Maximum Working Air
Pressure
Important Safety Instructions
Read all warnings and instructions in this
manual before using the equipment.
Save these instructions.

2 3A8816A
Contents
Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
General Information . . . . . . . . . . . . . . . . . . . . . . . 5
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . 5
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mount the Equipment . . . . . . . . . . . . . . . . . . . . . 6
Ventilate the Workspace . . . . . . . . . . . . . . . . . . . 6
Install Accessories . . . . . . . . . . . . . . . . . . . . . . . . 7
Flush Before First Use . . . . . . . . . . . . . . . . . . . . . 7
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Select a Spray Tip . . . . . . . . . . . . . . . . . . . . . . . . 8
Install the Spray Tip . . . . . . . . . . . . . . . . . . . . . . . 8
Adjust the Spray Tip . . . . . . . . . . . . . . . . . . . . . . 8
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Before Each Use . . . . . . . . . . . . . . . . . . . . . . . . . 9
Pressure Relief Procedure . . . . . . . . . . . . . . . . . . 9
Start and Adjust the Equipment. . . . . . . . . . . . . 10
Shut Down the Equipment. . . . . . . . . . . . . . . . . 11
Flushing and Storage . . . . . . . . . . . . . . . . . . . . . 11
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Establish a Preventive Maintenance Schedule . 12
Clean the Equipment . . . . . . . . . . . . . . . . . . . . . 12
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Prepare Equipment for Repair . . . . . . . . . . . . . . 15
Replace the Spray Tip . . . . . . . . . . . . . . . . . . . . 15
Repair the Fluid Section . . . . . . . . . . . . . . . . . . . 16
Repair the Air Piston, Spring, and Seals . . . . . . 17
Recycling and Disposal . . . . . . . . . . . . . . . . . . . . . 17
End of Product Life. . . . . . . . . . . . . . . . . . . . . . . 17
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Spray Tip Selection Chart . . . . . . . . . . . . . . . . . 19
Kits and Accessories . . . . . . . . . . . . . . . . . . . . . . . 20
Part Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Accessory Kits . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Technical Specifications . . . . . . . . . . . . . . . . . . . . 22
California Proposition 65 . . . . . . . . . . . . . . . . . . . . 22
Graco Standard Warranty. . . . . . . . . . . . . . . . . . . . 24
Approvals
Model 26C799 is certified:
II 2 G
Ex h IIA T6 Gb

Warnings
3A8816A 3
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The
exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks.
When these symbols appear in the body of this manual or on warning labels, refer back to these Warnings.
Product-specific hazard symbols and warnings not covered in this section may appear throughout the body of this
manual where applicable.
WARNING
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.
• Do not leave the work area while equipment is energized or under pressure.
• 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.
• Do not alter or modify equipment. Alterations or modifications may void agency approvals and
create 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 lines and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend lines or use lines to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
PRESSURIZED EQUIPMENT HAZARD
Fluid from the equipment, leaks, or ruptured components can splash in the eyes or on skin and cause
serious injury.
• Follow the Pressure Relief Procedure when you stop spraying/dispensing and before cleaning,
checking, or servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check lines, tubes, and couplings daily. Replace worn or damaged parts immediately.

Warnings
4 3A8816A
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.
• Eliminate all ignition sources, such as pilot lights, cigarettes, portable electric lamps, 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 fluid and air lines.
• Hold gun firmly to side of grounded pail when triggering into pail. Do not use pail liners unless they
are anti-static or conductive.
•Stop operation immediately if static sparking occurs or you feel a shock. Do not use equipment
until you identify and correct the problem.
• Keep a working fire extinguisher in the work area.
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.
MOVING PARTS HAZARD
Moving parts can pinch, cut or amputate fingers and other body parts.
• Keep clear of moving parts.
• Do not operate equipment with protective guards or covers removed.
• Equipment can start without warning. Before checking, moving, or servicing equipment, follow the
Pressure Relief Procedure and disconnect all power sources.
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when in the work area to help prevent serious injury, including
eye injury, hearing loss, and inhalation of toxic fumes. 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
3A8816A 5
Installation
General Information
•A typical installation is shown in FIG. 1. It is only a
guide for selecting and installing system
components. Contact your Graco distributor for
assistance in planning a system to suit your needs.
•Always use genuine Graco parts and accessories.
•Reference numbers and letters in parentheses refer
to the callouts in the figures.
Typical Installation
KEY:
FIG. 1: Typical Installation
A
BB
B
B
C
D
D
G
G
H
J
KM
N
P
R
R
R
S
T
UV
W
Y
E
Z
F
L
12 in.
(305 mm)
AAir line filter
BBall valves
CPump
DHigh pressure fluid filters
ESecond bleed-type air valve
FPump air control (includes pump air regulator)
GFlexible, conductive fluid supply line
HGun air regulator
JNormally closed 3-way air solenoid valve
(required, not supplied)
KHeater (if used)
LTee handle
MFluid filter
NFluid drain valve
P* Automatic spray gun
RAir line
STimer
TTimer switch
UFluid regulator
V* Workpiece
WBleed-type master air valve
YFluid shutoff valve
ZPump ground wire
* Ensure that the tip of the spray gun (P) is 12 in. (305 mm)
away from the surface of the workpiece (V).
NOTE: See Accessory Kits, page 20, for system
components that are available separately (purchase
separately).

Installation
6 3A8816A
Grounding
The following grounding instructions are minimum
requirements for a system. Check your system for other
components that must be grounded. Follow local
codes and regulations. Connect the system to a true
earth ground.
Spray gun: Ground through connection to a properly
grounded fluid line and pump.
Pump: Ground as detailed in your separate pump
manual.
Air and fluid lines: Use only electrically conductive
lines with a maximum of 100 ft (30.5 m) combined line
length to ensure grounding continuity. Check electrical
resistance of lines. If total resistance to ground exceeds
25 megohms, replace line immediately.
Air compressor: Follow manufacturer’s
recommendations.
Fluid supply container: Follow local codes and
regulations.
Object being sprayed: Follow local codes and
regulations.
Solvent pails used when flushing: Follow local codes
and regulations. Use only conductive metal pails,
placed on a grounded surface. Do not place the pail on
a nonconductive surface, such as paper or cardboard,
which interrupts grounding continuity.
Accessories: Follow local codes and regulations.
To maintain grounding continuity when flushing or
relieving pressure: Hold a metal part of the spray gun
firmly to the side of a grounded metal pail, then actuate
the gun.
Mount the Equipment
1. Ensure that the mounting setup can support the
weight of the spray gun (P), system components,
and accessories, as well as the stress caused
during operation.
2. Mount the spray gun (P) on a rod (AB) with a
diameter of 0.50 in. (12.7 mm). See FIG. 2.
3. Tighten the tee handle (L) to secure the spray gun
(P) in place.
NOTE: Ensure that the tip (22) of the spray gun (P)
is 12 in. (305 mm) away from the surface of the
workpiece (V). See FIG. 2.
NOTE: For ease of operation and service, mount
the spray gun so the spray gun components are
easily accessible.
FIG. 2: Mounting Rod
Ventilate the Workspace
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.
To prevent hazardous concentrations of toxic or
flammable vapors, only use the equipment in a
well-ventilated area. Only operate the equipment
when ventilation fans are operating. Follow local
codes and regulations.
P
AB
L
22

Installation
3A8816A 7
Install Accessories
Install the following accessories in the order shown in
FIG. 1, using adapters as necessary.
Install Air Line Accessories
•Bleed-type master air valve (W): Required in your
system to relieve air trapped between the air supply
and the gun when the valve is closed. Locate
upstream from the dispensing point.
•Second bleed-type air valve (E): Required in your
system to relieve air trapped between the air supply
and the pump when the valve is closed.
•Gun air regulator (H): controls air pressure to the
gun.
•Pump air regulator (F): To control pump speed
and outlet pressure. Locate close to the pump.
•Air line filter (A): Removes harmful dirt and
moisture from compressed air supply.
•Air supply: Use a normally closed 3-way air
solenoid valve (J) to control the spray gun (P).
Attach a flexible, conductive air supply line (R) from
the 3-way air solenoid valve (J) to the air inlet
adapter (3). See FIG. 3.
FIG. 3
Install Fluid Line Accessories
•Fluid filter (M): With a 60 mesh (250 micron)
stainless steel element to filter particles from the
fluid as it leaves the pump.
•Fluid drain valve (N): Required in your system to
relieve fluid pressure in the fluid line and gun.
•Fluid shutoff valve (Y): Shuts off fluid flow.
•Fluid pressure regulator (U): For more precise
adjustment of the fluid pressure to the gun.
•Gun (P): To dispense fluid.
•Fluid supply: Connect a flexible, conductive fluid
supply line (G) from the pump to the fluid inlet
housing (9) of the gun. See FIG. 3.
Flush Before First Use
The equipment was tested with water, which is left in
the fluid passages to protect parts. If the fluid being
dispensed could be contaminated by water, flush the
equipment with a compatible solvent before using the
equipment. See Flushing and Storage, page 11.
Trapped air can cause the equipment to actuate
unexpectedly, which could result in serious injury
from splashing fluid or moving parts. Keep fingers
away from moving parts. Keep body parts away from
the spraying end of the equipment.
R
3
P
9

Setup
8 3A8816A
Setup
Select a Spray Tip
A spray tip (22) is not provided with the gun assembly.
Select a spray tip (purchase separately) to install in the
gun. See Spray Tip Selection Chart, page 19.
Install the Spray Tip
1. Follow the Pressure Relief Procedure, page 9.
2. Close all air valves.
3. Unscrew the tip retaining nut (23).
4. Remove the gasket (21).
5. Install the spray tip (22) and gasket (21) inside the
tip retaining nut (23).
6. Securely tighten the tip retaining nut (23) to the
housing (9).
FIG. 4: Spray Tip
Adjust the Spray Tip
Adjust the Spray Pattern
The spray tip position determines the spray direction
and pattern orientation. To adjust the spray pattern
orientation:
1. Loosen the tip retaining nut (23).
2. Orient the slot in the spray tip (22) horizontally for a
horizontal pattern and vertically for a vertical
pattern. See FIG. 5.
3. Tighten the tip retaining nut (23) to secure the tip in
place. See FIG. 4.
Adjust the Spray Coverage
The spray tip orifice size and cut angle determine the
coverage and size of the spray pattern. For more
coverage, install a spray tip with a larger orifice.
1. Select a spray tip. See Spray Tip Selection Chart,
page 19.
2. Replace the spray tip as needed to meet your
coverage and spray pattern requirements. Follow
Replace the Spray Tip, page 15.
To avoid injury from pressurized fluid, do not put your
hand in front of the spray tip when installing,
removing, or adjusting the spray tip.
NO YES
20
21
22
23
9
Vertical Pattern
Horizontal Pattern
FIG. 5: Spray Pattern ti8196a ti8170
NOTICE
To prevent equipment damage, do not increase
pump pressure to increase spray coverage. Instead,
use a larger spray tip.

Operation
3A8816A 9
Operation
Before Each Use
Check the Spray Tip
Before each use, check the spray tip (22) before
operating the equipment:
• Clean the spray tip as needed. See Clean the
Spray Tip, page 13.
• Adjust the spray tip as needed. See Adjust the
Spray Tip, page 8.
• Replace worn or damaged parts as needed.
Tighten Connections
Before each use, check and tighten all air and fluid
connections before operating the equipment. Replace
worn or damaged parts as needed.
Lubricate the Equipment
1. Before each day of operation, lubricate the
exposed portion of the needle (19) and the air
piston (16). Use a lubricant compatible with the
fluid being dispensed.
2. After lubricating, cover the exposed portions or the
needle (19) and air piston (16) with a piece of plastic
to prevent fluid build-up on these parts.
Flush the Equipment
Flush the equipment before each use, before changing
colors, and after operating the equipment.
See Flushing and Storage, page 11.
Pressure Relief Procedure
Follow the Pressure Relief Procedure
whenever you see this symbol.
1. Shut off power to the pump (C).
2. Close the bleed-type air valve (E).
3. Close the fluid shutoff valve (Y).
4. Hold a metal part of the gun firmly to a grounded
metal pail. See FIG. 6.
5. Actuate the gun into a grounded metal waste
container to relieve pressure. See FIG. 6.
FIG. 6
6. Close the bleed-type master air valve (W).
NOTICE
Firmly tighten all fasteners and connections to avoid
air or fluid leaks. Air or fluid leaks may damage
equipment parts.
NOTICE
Do not over-lubricate the equipment. Lubricant could
contaminate your fluid supply or other equipment.
Excessive lubrication can also cause the equipment
to malfunction.
NOTICE
Fluid buildup on equipment parts could damage the
fluid section. To prevent fluid buildup on equipment
parts, cover exposed equipment parts with a piece of
plastic.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as splashing fluid and moving
parts, follow the Pressure Relief Procedure when
you stop spraying and before cleaning, checking, or
servicing the equipment.
AC
23

Operation
10 3A8816A
7. Open all fluid drain valves (N) in the system. Have a
waste container ready to catch drainage. Leave
drain valves open until ready to spray again.
8. If the spray tip or line is clogged, or if the pressure
has not been fully relieved:
a. Very slowly loosen the tip retaining nut (23) or
the fluid line clamp (AC) to gradually relieve
pressure. See FIG. 6.
b. Remove the tip retaining nut (23) or the fluid line
clamp (AC) completely.
c. Clear the obstruction in the line or tip.
Start and Adjust the Equipment
1. Confirm that the equipment is properly grounded.
See Grounding, page 6.
2. Check the spray tip (22) before operating the
equipment. See Check the Spray Tip, page 9.
3. Check and tighten the tip retaining nut (23) before
operating the equipment. Replace worn or
damaged parts as needed.
4. Check and tighten all air and fluid connections
before operating the equipment. Replace worn or
damaged parts as needed.
5. Set the timer (S) so that the gun will start spraying
before meeting the workpiece (V) and stop spraying
just after the workpiece has passed.
6. Set the actuating air to a minimum of 50 psi (325
kPa, 3.4 bar). Do not exceed 200 psi (1.4 MPa,
14 bar)
7. Start the pump. See your separate pump manual.
8. Adjust the pump speed and pressure to modify
atomization.
NOTE: Use the lowest pump speed and pressure
necessary for the desired results. Higher speed or
pressure may not improve the spray pattern and
will cause premature tip wear and pump wear.
NOTE: The spray tip orifice size and angle determine
coverage and pattern. See Adjust the Spray Pattern,
page 8, and Adjust the Spray Coverage, page 8.
To avoid injury from pressurized fluid, such as
splashing fluid and moving parts:
• Do not put your hand in front of the spray tip.
• Keep fingers away from moving parts, such as the
needle (19).
• Do not exceed the maximum fluid pressure rating.
See Technical Specifications, page 22.
NOTICE
Firmly tighten all connections to avoid air or fluid
leaks. Air or fluid leaks may damage equipment
parts.
NOTICE
To prevent equipment damage, do not increase
pump pressure to increase spray coverage. Instead,
use a larger spray tip.

Operation
3A8816A 11
Shut Down the Equipment
At the end of each work shift, follow Pressure Relief
Procedure, page 9.
Flush the equipment if necessary. See Flushing and
Storage, page 11.
Flushing and Storage
•Flush before changing fluid materials, before fluid
can dry or freeze in the equipment, at the end of the
day, before storing, and before repairing equipment.
•Flush at the lowest pressure possible. Check and
tighten all fluid connections. Replace worn or
damaged parts as needed.
•Flush with a solvent that is compatible with the fluid
being dispensed and the equipment wetted parts.
•Flushing schedule will vary based on particular
uses.
•Always follow Pressure Relief Procedure, page 9,
and flush the equipment before storing it for any
length of time.
1. Follow Pressure Relief Procedure, page 9.
2. Remove the spray tip and thoroughly clean parts.
Follow Disassemble the Spray Tip, page 15, and
Clean the Spray Tip, page 13.
3. Supply a compatible solvent to the gun.
4. Set the pump to the lowest possible fluid pressure,
and start the pump. See your separate pump
manual.
5. Hold a metal part of the gun firmly to a grounded
metal pail. Actuate the gun until clean solvent
dispenses. See FIG. 7.
NOTE: Never point the gun up while dispensing
fluid.
FIG. 7
6. Follow Pressure Relief Procedure, page 9.
7. Disconnect the solvent supply.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as splashing fluid and moving
parts, follow the Pressure Relief Procedure when
you shut down the equipment.
To avoid fire and explosion, always ground
equipment and waste container. To avoid static
sparking and injury from splashing fluid, always flush
at the lowest possible pressure.

Maintenance
12 3A8816A
Maintenance
Establish a Preventive
Maintenance Schedule
Establish a preventive maintenance schedule based on
the equipment service history.
Inspect the Equipment
Regularly inspect the equipment for leaks and worn or
damaged parts. Replace parts as needed.
Tighten Connections
Check and tighten all air and fluid connections before
operating the equipment. Replace worn or damaged
parts as needed.
Flush the Equipment
Flush the equipment before each use, before changing
colors, and after operating the equipment.
1. Follow Flushing and Storage, page 11.
2. Disassemble and clean individual parts as needed.
See applicable disassembly procedures.
Clean the Equipment
NOTE: Cleaning kits are available (purchase
separately). See Kits and Accessories, page 20.
Clean Filters
Clean the fluid filters and air line filters daily. If using an
in-line filter, regularly remove and clean the in-line filter
thoroughly in a compatible solvent. Replace filters as
needed.
NOTICE
Regularly maintain the equipment to avoid
equipment damage.
NOTICE
Firmly tighten all connections to avoid leaks and
damage to equipment parts.
To avoid injury from pressurized fluid, such as
splashing fluid and moving parts:
• Do not put your hand in front of the spray tip.
• Keep fingers away from moving parts, such as the
needle (19).
NOTICE
To avoid damage to equipment parts:
• Ensure that the cleaning solvent is compatible
with the fluid being dispensed.
• Do not use any cleaning method that may cause
solvent to enter the air passages of the gun.
• Do not immerse the gun in solvent.
• Do not clean the gun with a cloth soaked in
solvent. Remove excess solvent. Only use a soft
cloth that is dampened with a compatible solvent.
• Do not use metal instruments or sharp tools to
clean the hole in the spray tip.

Maintenance
3A8816A 13
Clean the Spray Tip
To reduce buildup, frequently clean the front of the
spray tip throughout the day.
1. Follow Pressure Relief Procedure, page 9.
2. Clean the outside of the spray tip with a soft cloth
or soft brush dampened with a compatible solvent.
Clear Clogs
1. Follow Pressure Relief Procedure, page 9.
2. Follow Disassemble the Spray Tip, page 15.
3. Clean the inside and outside of the spray tip with a
soft cloth or soft brush dampened with a
compatible solvent.
NOTE: As needed, soak the clogged tip in a
compatible solvent and use a soft bristled brush to
clean the tip. Do not use sharp or metal tools to
clean the spray tip.
NOTE: To remove a hardened particle from the
spray tip: Remove the spray tip and blow air
through the orifice from the front.
4. Inspect parts for wear or damage. Replace parts as
needed.
NOTICE
To avoid damage to the spray tip, only clean the
spray tip with a compatible solvent and soft cloth or
soft brush.
NOTICE
To avoid damage to the spray tip, do not use metal
instruments or sharp tools to clean the hole in the
spray tip. Metal instruments and sharp tools may
damage the hole in the spray tip and distort the
spray pattern.

Troubleshooting
14 3A8816A
Troubleshooting
1. Follow Pressure Relief Procedure, page 9, before
checking or repairing the equipment.
2. Check all possible problems and causes before
disassembling the equipment.
Problem Cause Solution
Uneven spray pattern Low fluid pressure Increase pressure to pump or adjust
fluid pressure regulator.
Spray pattern leaves tails or fingers Low fluid pressure Increase pressure to pump or adjust
fluid pressure regulator.
Fluid too viscous Decrease fluid viscosity by thinning,
heating, or agitation.
Fluid supply is low Refill supply.
Tip orifice too small for fluid Change to larger tip.
Gun will not stop spraying Fluid needle is binding Clean, repair.
Piston packing is binding Repair.
Obstructed or worn needle or seat Clean or replace.
Spring housing assembly (5, 6) not
fully tightened
Fully tighten the spring housing
assembly (5, 6) in the air cylinder
cap (4).
Gun will not spray Pump not operating Refer to separate pump manual.
Fluid line clogged Clear.
Fluid valve closed Open.
Clogged spray tip or needle seat Clean.
No actuator air pressure Check, clean air lines.
Worn or dry piston packings Replace.
Distorted spray pattern Low fluid pressure Increase pressure to pump or adjust
fluid pressure regulator.
Clogged spray tip or needle seat Clean.
Fluid buildup on tip or worn tip Clean, replace.

Repair
3A8816A 15
Repair
NOTE: Repair kits are available (purchase separately).
See Kits and Accessories, page 20.
Prepare Equipment for Repair
Always complete the following procedure before
performing any service or repair to the equipment.
1. Follow Pressure Relief Procedure, page 9.
2. Follow Flushing and Storage, page 11.
3. Verify that the equipment is turned off and power to
the system is disconnected before performing any
service or repair procedure.
4. Disconnect all air and fluid lines.
Replace the Spray Tip
Disassemble the Spray Tip
1. Follow the Pressure Relief Procedure, page 9.
2. Close all air valves.
3. Unscrew the tip retainer (23).
4. Disassemble the gasket (21) and spray tip (22).
5. Clean and inspect parts for wear or damage.
Replace parts as necessary.
Reassemble the Spray Tip
6. Install the spray tip (22) and gasket (21) inside the
tip retainer (23).
7. Securely tighten the tip retainer (23) to the housing
(9). See FIG. 8.
NOTE: The spray tip position determines the direction
and pattern width. To adjust the pattern, see Adjust the
Spray Pattern, page 8.
FIG. 8
Servicing this equipment may cause injury from
pressurized fluid if work is not properly performed.
• Do not service this equipment unless you are
trained and qualified.
• To reduce risk of injury, follow the Pressure
Relief Procedure before checking, servicing, or
repairing the equipment.
To avoid injury from pressurized fluid, do not put your
hand in front of the spray tip when installing,
removing, or adjusting the spray tip.
20
21
22
23
9

Repair
16 3A8816A
Repair the Fluid Section
Disassemble the Fluid Section
See FIG. 9.
1. Follow Prepare Equipment for Repair, page 15.
2. Unscrew the locknut (11).
3. Use an applicable wrench to hold the nut (15)
securely in place. At the same time, unscrew the
housing (9).
4. Remove the housing (9) from the gun body (1).
5. Remove the seat (20) and gasket (12) from the
housing (9).
6. Remove the needle (19) assembly from the socket
in the air piston (16).
7. Disassemble the needle (19), locknut (11), nut (15),
gland (14), and washers (13).
8. Remove the spray tip. Follow Disassemble the
Spray Tip, page 15.
9. Remove the seat (20) and gasket (12) from the
housing (9).
10. Clean and inspect parts for wear or damage.
Replace parts as necessary.
Reassemble the Fluid Section
See FIG. 9.
1. Install the gasket (12) and seat (20) in the
housing (9). Torque the seat (20) to 190–210 in-lb
(21–24 N•m).
2. Install the spray tip. Follow Reassemble the Spray
Tip, page 15.
3. Assemble the needle (19), locknut (11), nut (15),
gland (14), and washers (13).
4. Install the needle (19) assembly in the socket of the
air piston (16).
5. Insert the housing (9) assembly over the needle (19)
and through the hole in the gun body (1).
6. Use an applicable wrench to hold the nut (15)
securely in place. At the same time, tighten the
housing (9) to the gun body (1). Securely tighten.
7. Securely tighten the locknut (11) to the housing (9).
FIG. 9: Fluid Section
FIG. 10: Cutout View of Fluid Section
11
19
15
14
1
13
9
12
2123
16
1
Torque to 190–210 in-lb (21–24 N•m).
1
20
4
16
18
19
13/14
9/10
23
1
22
15

Repair
3A8816A 17
Repair the Air Piston, Spring,
and Seals
Disassemble the Air Piston, Spring, and
Seals
See FIG. 11.
1. Follow Prepare Equipment for Repair, page 15.
2. Follow Disassemble the Fluid Section, page 16.
3. Remove the air cylinder cap (4) assembly.
4. Remove the spring (7).
5. Remove the guide (8), seal (17), air piston (16), and
seal (18) from the gun body (1).
6. Clean and inspect parts for wear or damage.
Replace parts as necessary.
Reassemble the Air Piston, Spring, and
Seals
See FIG. 11.
1. Lubricate applicable parts with a light, waterproof
grease. See FIG. 11.
2. Install the seal (18), air piston (16), seal (17), guide
(8) in the gun body (1).
3. Install the spring (7) in the air cylinder cap assembly
(4, 5, 6).
4. Install the air cylinder cap assembly (4, 5, 6) to the
gun body (1). Securely tighten.
5. Fully turn the spring housing assembly (5, 6) onto
the air cylinder cap assembly (4) to secure the
spring (7) in place. Securely tighten.
NOTE: Ensure the spring housing assembly (5, 6) is
fully tightened to the air cylinder cap (4).
FIG. 11: Air Piston, Spring, and Seals
Recycling and Disposal
End of Product Life
At the end of a product’s useful life, recycle it in a
responsible manner.
To avoid injury from pressurized fluid, ensure the
spring housing assembly (5, 6) is fully tightened to
the air cylinder cap (4). If the spring housing
assembly (5, 6) is not fully tightened, the gun may not
shut off.
6
8
5
4
16
1
1
Liberally apply a light, waterproof
grease.
1
1
17
18
1
7
2
2Lightly apply a light, waterproof grease
to threads.
2

Parts
18 3A8816A
Parts
4
6
5
7
8
17
16
18
1
11
3
2
19
15
14
13
9
12
20
21
23 22
25▲
9a
100
101

Parts
3A8816A 19
Parts
Spray Tip Selection Chart
Ref. Part Description Qty.
1– – – BODY, gun, valve housing 1
2 205355 SCREW, handle, tee 1
3 162453 FITTING, air connection, 1/4
npsm x 1/4 npt
1
4 166848 CAP, cylinder 1
5 164737 HOUSING, spring 1
6 164736 PIN, drive 1
7 164739 SPRING, compression 1
8 164740 GUIDE, spring 1
9– – – HOUSING, fluid 1
9a – – – CONNECTION, fluid, 1/2 in.
sanitary clamp connection
11 102300 NUT 1
12* 176255 GASKET, nylon 1
13* 168296 WASHER, packing 3
14* – – – GLAND, packing 1
15* – – – NUT, packing 1
16 164741 PISTON, air 1
17* 156593 SEAL, o-ring 1
18* 155685 SEAL, o-ring 1
19* – – – NEEDLE, fluid 1
20* – – – SEAT, valve 1
21 166969 GASKET, non-metallic 1
22‡◆– – – TIP, spray 1
23 18F539 NUT, tip, retainer 1
25▲26D796 TAG, warning 1
100‡*– – – GASKET 1
101‡*– – – CLAMP 1
– – – Not available separately.
▲Replacement safety labels, tags, and cards are
available at no cost.
*See Kits and Accessories, page 20.
‡Not part of the equipment assembly. Only available
separately.
◆See Spray Tip Selection Chart, page 19.
Ref. Part Description Qty.
Spray Tips
Orifice Size
Fluid Output
(at 600 psi
(4.1 MPa, 41 bar))
Maximum Pattern Width
(at 12 in. (305 mm) distance from the workpiece)
6 to 8 in.
(150 mm)
8 to 10 in.
(200 mm)
10 to 12 in.
(250 mm)
12 to 14 in.
(300 mm)
14 to 16 in.
(300 mm)
16 to 18 in.
(400 mm)
18 to 20 in.
(450 mm)
in. mm oz/min lpm Part
0.013 0.330 0.018 0.69 16S313
0.015 0.381 0.024 0.91 16S315 16S415 16S515
0.017 0.432 0.031 1.17 16S417 16S517 16S717
0.019 0.483 0.39 1.47 16S419 16S519 16S719 16S819 16S919
0.021 0.533 0.47 1.79 16S421 16S521 16S621 16S821 16S921
0.023 0.584 0.57 2.15 16S423 16S523 16S723 16S823 16S923
0.025 0.635 0.67 2.54 16S525 16S825
0.027 0.686 0.78 2.96 16S527

Kits and Accessories
20 3A8816A
Kits and Accessories
Part Kits
Fluid Section Kits
Accessory Kits
Clamp Kits
Air Valve Kits
Tool Kits
Cleaning Kits
Kit Description Includes
26D735 KIT, fluid section,
needle valve
• 1 seat valve (20)
• 1 gasket (12)
• 3 washers (13)
• 1 packing gland (14)
• 1 nut (15)
• 1 needle (19)
• 1 seal (17)
• 1 seal (18)
Kit Description Includes
26D734 GASKET,
1/2 in.
Buna-N
gasket for
sanitary
tri-clamps
5 gaskets
(100)
19F478 CLAMP, 1/2
in. sanitary
clamp
1 clamp
(101)
Kit Description Includes
107141 VALVE, air,
ball, vented;
3/4-14 npt
inlet and
outlet
1 bleed type
master air
valve (W)
107142 VALVE, air,
ball, vented;
1/2-14 npt
inlet and
outlet
1 bleed type
master air
valve (W)
WLD
Kit Description Includes
171147 TOOL,
wrench
1 wrench
Kit Description Includes
101891 BRUSH, nylon,
cleaning, 3/8 in.
diameter
1 brush