Graco 308491U Operation manual

II 2 G
308491U
EN
Instructions - Parts List
Texture Airless
Spray Gun
27.6 MPa (276 bar, 4000 psi) Maximum Working Pressure
Part No. 241705, Series B
Includes Rac®Tip Guard and LTX531 Switch Tip®
Part No. 289605 (Europe Only), Series B
Includes Rac®Tip Guard and HDA531 Switch Tip®
IMPORTANT SAFETY INSTRUCTIONS
Read all warnings and instructions in the repair kit instructions and in the Owners/Operation manual for the
sprayer.
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2308491U
Contents
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation/Operation . . . . . . . . . . . . . . . . . . . . . . . 5
System Requirements . . . . . . . . . . . . . . . . . . . . . 5
Ground the System . . . . . . . . . . . . . . . . . . . . . . . 5
Pressure Relief Procedure . . . . . . . . . . . . . . . . . 5
How to Use the Gun Trigger Safely . . . . . . . . . . 5
How to Operate the Gun . . . . . . . . . . . . . . . . . . . 6
How to Adjust the Spray Pattern . . . . . . . . . . . . . 6
Care of the Spray Tip and Tip Guard . . . . . . . . . 7
How to Flush the Gun . . . . . . . . . . . . . . . . . . . . . 8
How to Check the Gun Diffuser Operation . . . . . 9
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Repair Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Test the Gun Before Regular Use . . . . . . . . . . . 13
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Part No. 241705, Series B
Texture Airless Spray Gun . . . . . . . . . . . . . 14
Technical Specifications . . . . . . . . . . . . . . . . . . . . 15
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 16
Graco Information. . . . . . . . . . . . . . . . . . . . . . . . . . 16

Warnings
308491U 3
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama
tion 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.
SKIN INJECTION HAZARD
High-pressure spray is able to inject toxins into the body and cause serious bodily injury. In the event
that injection occurs, get immediate surgical treatment.
• Do not aim the gun at, or spray any person or animal.
• Keep hands and other body parts away from the discharge. For example, do not try to stop leaks
with any part of the body.
• Always use the nozzle tip guard. Do not spray without nozzle tip guard in place.
• Use Graco nozzle tips.
• Use caution when cleaning and changing nozzle tips. In the case where the nozzle tip clogs while
spraying, follow the Pressure Relief Procedure for turning off the unit and relieving the pressure
before removing the nozzle tip to clean.
•Equipment maintains pressure after power is shut off. Do not leave the equipment energized or
under pressure while unattended. Follow the Pressure Relief Procedure when the equipment is
unattended or not in use, and before servicing, cleaning, or removing parts.
• Check hoses and parts for signs of damage. Replace any damaged hoses or parts.
• This system is capable of producing 4000 psi. Use Graco replacement parts or accessories that are
rated a minimum of 4000 psi.
• Always engage the trigger lock when not spraying. Verify the trigger lock is functioning properly.
• Verify that all connections are secure before operating the unit.
• Know how to stop the unit and bleed pressure quickly. Be thoroughly familiar with the controls.
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. Paint or sol
vent 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 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.
•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.

Warnings
4308491U
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 Data in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in
all equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information
about your material, request Safety Data Sheet (SDS) from distributor or retailer.
• Do not leave the work area while equipment is energized or under pressure. (If applicable.)
• 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 man
ufacturer’s replacement parts only.
• Do not alter or modify equipment. Alterations or modifications may void agency approvals and cre
ate 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.
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 Sheet (SDS) 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.
RECOIL HAZARD
Gun may recoil when triggered. If you are not standing securely, you could fall and be seriously
injured.

Installation/Operation
308491U 5
Installation/Operation
System Requirements
1. The pressure drain valve assists in relieving fluid
pressure in the displacement pump, hose and gun;
triggering the gun to relieve pressure may not be
sufficient.
2. Strain the fluid you are spraying if it contains parti
cles which could clog the spray tip.
Ground the System
Pressure Relief Procedure
1. Lock the gun trigger safety.
2. Shut off the power to the pump.
3. Unlock the gun trigger safety
4. Hold the metal part of the gun firmly to a grounded
metal pail. Trigger the gun to relieve pressure.
5. Lock the trigger lock safety.
6. Open the drain valve, having a container ready to
catch the drainage. Observe the pressure gauge.
The gauge reads 0 psi/bar when fully drained.
Leave the drain valve open until you are ready to
spray again.
7. If you suspect the spray tip or hose is clogged or
that pressure has not been fully relieved:
a. VERY SLOWLY loosen the spray tip guard
retaining nut or the hose end coupling to relieve
pressure gradually.
b. Loosen the nut or coupling completely.
c. Clear airless hose or spray tip obstruction.
How to Use the Gun Trigger
Safely
1. To lock the gun trigger safety, turn the safety to a
right angle with the gun body.
2. To unlock the gun trigger safety, push the safety out
and turn it parallel with the gun body.
Keep the wallet-sized warning card provided with this
gun with the operator at all times. The card contains
important treatment information should an injection
injury occur. Additional cards are available at no
charge from Graco Inc.
To reduce the risk of static sparking, ground the
pump and all other equipment used or located in the
spray area. Check your local electrical code for
detailed grounding instructions for your area and type
of equipment. Also follow the grounding instructions
provided in your pump or sprayer manual. The gun
obtains grounding through connection to a properly
grounded fluid hose and pump or sprayer. Also read
FIRE OR EXPLOSION HAZARD on page 3.
To reduce the risk of serious injury, including fluid
injection, splashing fluid or solvent in the eyes or on
the skin, follow this procedure when you are instructed
to relieve pressure, when you stop spraying, shut off
the pump, check or service any system equipment, or
install, clean or change spray
tips.
Gun trigger safety shown locked
Gun trigger safety shown unlocked
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2
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Installation/Operation
6308491U
How to Operate the Gun
1. Connect an electrically conductive fluid hose (A) to
the gun inlet.
2. With no tip installed, start the pump. Flush the pump
according to the instructions supplied with it. Use
the lowest pressure possible. Prime the system with
the material.
3. Relieve pressure.
4. Install the SwitchTip (8) and tip guard (30). Follow
the instructions in the manual, supplied.
5. Start the pump. Trigger the gun onto test paper.
Adjust the fluid pressure until the spray is com
pletely atomized. Use the lowest pressure neces
sary to get the desired results. Higher pressure may
not improve the spray pattern and will cause prema
ture tip and pump wear.
6. If adjusting the pressure does not give a good spray
pattern, relieve pressure and then try another tip
size.
7. Use a full-open, full-close trigger action. Hold the
gun about 14 in. (350 mm) from and at right angles
to the work surface. Don’t swing the gun in an arc.
Practice to find the best length and speed of stroke.
How to Adjust the Spray Pattern
1. To adjust the spray pattern direction, relieve pres
sure. Loosen the tip guard retaining nut (B). Turn
the tip guard/tip groove horizontally (C) for a hori
zontal pattern and vertically (A) for a vertical pattern.
Tighten the nut.
2. The spray tip orifice and spray angle determines the
coverage and size of pattern. When more coverage
is needed, use a larger spray tip rather than increas
ing fluid pressure.
To reduce the risk of component rupture, and serious
injury, including fluid injection, do not exceed the
gun’s 4000 psi (276 bar, 27.6 MPa) Maximum
Working Pressure or the maximum working
pressure of lowest rated component in the system.
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8
A
NOTICE
Openings in the tip guard reduce paint buildup on the
guard while spraying. Damage to the sharp edges of
the openings causes paint to collect at that area.
Never hang the gun by the tip guard.
A
B
C
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Installation/Operation
308491U 7
Care of the Spray Tip and Tip
Guard
Cleaning during the day
1. Relieve pressure.
2. Clean the front of the tip frequently during the day to
help reduce buildup. Also clean the tip and tip guard
at the end of each work day. Use a solvent soaked
brush to clean the spray tip.
If the spray tip clogs while spraying
1. Stop spraying immediately.
2. Lock the gun trigger safety. Rotate the tip handle
back 180_.
3. Unlock the gun trigger safety. Trigger the gun into a
pail or onto the ground to remove the clog.
4. Lock the gun trigger safety. Rotate the tip handle to
the spraying position.
5. If the tip is still clogged, engage the gun trigger
safety, shut off the sprayer and disconnect the
power source, and open the pressure drain valve to
relieve pressure. Clean the spray tip as shown in
operation manual.
To reduce the risk of fluid injection or splashing in the
eyes or on the skin, do not hold a hand, body or rag
in front of the spray tip when cleaning or checking a
clogged tip. Point the gun toward the ground or into a
waste container when checking to see if the spray tip
is cleared.
Do not try to “blow back” paint; this is not an air spray
gun.
Do not wipe fluid buildup off the gun or spray tip until
pressure is relieved.
SKIN INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to
relieve pressure, follow the How to
Operate the Gun page 6.
NOTICE
Never soak the entire gun in solvent. Prolonged
exposure to solvent can ruin the packings.
Spraying position shown. Turn handle 180° and trigger gun
to clear clog.
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Installation/Operation
8308491U
How to Flush the Gun Always flush the pump and gun before the fluid being
sprayed can dry in it.
Note: This procedure requires a grounded pail of
compatible solvent.
1. Relieve pressure.
2. Remove the tip guard and spray tip. Soak and clean
the parts.
3. Remove the pump intake from the original pail.
4. Put the pump intake in a grounded pail of compati
ble solvent.
5. Start the pump at its lowest pressure.
6. Trigger the gun into the original pail. When solvent
appears, release the trigger.
7. Now trigger the gun into the solvent pail. Circulate
the fluid until the system is thoroughly flushed.
8. Relieve pressure.
To reduce the risk of fluid injection or splashing in the
eyes or on the skin, or static electric discharge when
flushing:
• Be sure the entire system, including flushing
pails, are properly grounded.
• Remove the tip guard and spray tip.
• Maintain metal to metal contact between the gun
and the flushing pail.
• Use the lowest possible pressure
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Installation/Operation
308491U 9
How to Check the Gun Diffuser
Operation
The Standard Needle and Seat Kit, 237398, has the
number 090 stamped on the needle and seat. The seat
does have a diffuser.
The optional Non-diffused Needle and Seat Kit, 237260,
has the number 125 stamped on the needle and seat.
The seat does not have a diffuser.
Check the diffuser operation weekly. The gun
diffuser/seat (2a) breaks up spray and reduces the risk
of fluid injection when the tip is not installed. Perform the
test below. If it fails, replace the entire Needle and Seat
Kit. Diffuser/seats and needles are not sold separately;
using old parts with new ones will result in leakage.
1. Relieve pressure.
2. Remove the tip guard and spray tip.
3. Start the sprayer and adjust it to the lowest pres
sure.
4. Aim the gun into a grounded metal pail while holding
it firmly to the pail. Trigger the gun. If the fluid emit
ted is not diffused into an irregular stream, replace
the entire needle kit immediately
The diffuser, located in the valve seat, creates an
irregular spray pattern when the gun is sprayed
without the tip guard, such as during cleaning. This
reduces the risk of an injection injury.
If you are using the optional Kit 237260, you must
take extra precautions to keep your hands and body
away from the nozzle of the gun.
always have the tip guard in place during regular
spraying operations.
SKIN INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to
relieve pressure, follow the How to
Operate the Gun page 6.
Irregular Spray Pattern.
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Service
10 308491U
Service
Repair Notes
The needle and seat are available only as a kit which
includes items 2a to 2e.
The Standard Needle and Seat Kit, 237398, has the
number 090 stamped on the needle and seat.
A Non-diffused Needle and Seat Kit, 237260, has the
number 125 stamped on the needle and seat. It is
recommended only for use with mastics, sealers and
other high viscosity materials which have fillers that
cannot pass through the standard seat’s diffuser.
Use high quality, general purpose grease where grease
is indicated.
Disassembly
NOTE: If replacing only the needle and seat, Step 4 and
5 are not required. However, removing them allows you
to clean the gun more thoroughly.
1. Relieve pressure
2. Disconnect the fluid hose (A). Remove the tip guard
(30). Unscrew the spring screw (21) about 1/4 in. (7
mm) to release spring tension.
3. Unscrew the valve seat (2a). Remove the gasket
(2b).
4. Remove one e-clip (27). Push out the pin (18).
Remove the screw (29), pivot pin (28), and trig
ger(25).
5. Remove the screws (24).
To reduce the risk of serious injury from fluid injection
or splashing, always follow the How to Operate the
Gun page 6 before servicing the gun.
3
0
21
A
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a
2b
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9
28
27
18
2
5
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