Graco 308491U Operation manual

II 2 G

308491U

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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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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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.

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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.

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