Graco 241705 Operation manual

Instructions -- Parts List

GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440- 1441

Texture Airless Spray Gun

27.6 MPa (276 bar, 4000 psi) Maximum Working Pressure

Part No. 241705, Series B

Includes a RACrTip Guard and LTX531 Switch Tipr

Part No. 289605 (Europe Only), Series B

Includes a RACrTip Guard and HDA531 Switch Tipr

308491S

03965

II 2 G

Important Safety Instructions

Read all warnings and instructions in this manual.

Save these instructions.

See page 2 for Table of Contents.

3084912

Table of Contents

Symbols 2.................................

Warnings 3.................................

Installation/Operation 5......................

System Requirements 5...................

Ground the System 5......................

How to Use the Gun Trigger Safety 5........

Pressure Relief Procedure 5................

HowtoUsetheGun 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.................................

Parts 14...................................

Technical Data 15...........................

Dimensions 15..............................

Graco Phone Numbers 15....................

The Graco Warranty and Disclaimers 16.......

Symbols

Warning Symbol

WARNING

This symbol alerts you to the possibility of serious

injury or death if you do not follow the instructions.

Caution Symbol

CAUTION

This symbol alerts you to the possibility of damage to

or destruction of equipment if you do not follow the

corresponding instructions.

308491 3

SKIN INJECTION HAZARD

Spray from the gun, leaks or ruptured components can inject fluid into your body and cause ex-

tremely serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin

can also cause serious injury.

DFluid injected into the skin may look like just a cut, but it is a serious injury. Get immediate surgi-

cal treatment.

DDo not point the spray gun at anyone or any part of the body.

DDo not put hand or fingers over the spray tip.

DDo not stop or deflect fluid leaks with your hand, body, glove or rag.

DDo not “blow back” fluid; this is not an air spray system.

DAlways have the tip guard and the trigger guard on the spray gun when spraying.

DCheck the gun diffuser operation weekly. Refer to the gun manual.

DBe sure the gun trigger safety operates before spraying the gun.

DLock the gun trigger safety when you stop spraying.

DFollow the Pressure Relief Procedure on page 5 if the spray tip clogs and before cleaning,

checking or servicing the equipment.

DTighten all fluid connections before each use.

DCheck the hoses, tubes and couplings daily. Replace worn or damaged parts immediately. Per-

manently coupled hoses cannot be repaired.

DHandle and route hoses and tubes carefully. Keep hoses and tubes away from moving parts and

hot surfaces. Do not kink or over bend the hoses or use the hoses to pull equipment. Do not

expose Graco hoses to temperatures above 180_F(82_C) or below --40_F(--40_C).

FIRE AND EXPLOSION HAZARD

Improper grounding, poor air ventilation, open flames or sparks can cause a hazardous condition

and result in a fire or explosion and serious injury.

DGround all equipment in the work area. See Ground the System on page 5.

DIf there is any static sparking while using the equipment, stop spraying immediately. Identify

and correct the problem.

DProvide fresh air ventilation to avoid the buildup of flammable vapors from solvent or the fluid be-

ing sprayed.

DDo not smoke in the spray area.

DExtinguish all open flames or pilot lights in the spray area.

DDo not turn on or off any light switch in the spray area.

DElectrically disconnect all equipment in the spray area.

DKeep the spray area free of debris, including solvent, rags and gasoline.

DDo not operate a gasoline engine in the spray area.

DKeep a fire extinguisher in the work area.

WARNING

3084914

EQUIPMENT MISUSE HAZARD

Equipment misuse can cause the equipment to rupture, malfunction or start unexpectedly and result

in serious injury.

DThis equipment is for professional use only.

DRead all instruction manuals, tags, and labels before operating the equipment.

DUse the equipment only for its intended purpose. If you are in doubt about this, call your Graco

distributor.

DDo not alter or modify this equipment.

DCheck equipment daily. Repair or replace worn or damaged parts immediately.

DDo not exceed the maximum working pressure of the lowest rated system component. Refer to

the Technical Data on page 15 for the maximum working pressure of this equipment.

DDo not move or lift pressurized equipment.

DUse fluids or solvents which are compatible with equipment wetted parts. Refer to the Technical

Data section on page 15 and all equipment manuals. Read the fluid and solvent manufacturer’s

warnings.

DDo not use 1,1,1--trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or

fluids containing such solvents in pressurized aluminum equipment. Such use could result in a

chemical reaction, with the possibility of explosion.

DFluid hoses must have spring guards on both ends to protect them from rupture caused by kinks

or bends at or close to the couplings.

DComply with all applicable local, state and national fire, electrical and other safety regulations.

TOXIC FLUID HAZARD

Improper handling of hazardous fluids or inhaling toxic fumes can cause extremely serious injury,

even death, due to splashing in the eyes, ingestion, or bodily contamination.

DKnow the specific hazards of the fluid you are using.

DStore hazardous fluid in an approved container. Dispose hazardous fluid according to all local,

state and national guidelines.

DWear appropriate clothing, gloves, eyewear and respirator.

RECOIL HAZARD

Due to the high pressure fluid emitted, a strong recoil action may occur when you trigger this gun. If

you are unprepared, your hand could be forced back toward your body or you could lose your bal-

ance and fall, resulting in serious injury.

WARNING

INSTRUCTIONS

308491 5

Installation/Operation

System Requirements

WARNING

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.

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

particles which could clog the spray tip.

Ground the System

WARNING

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 con-

nection to a properly grounded fluid hose and pump

or sprayer. Also read FIRE OR EXPLOSION HAZ-

ARD on page 3.

How to Use the Gun Trigger Safety

1. To lock the gun trigger safety, turn the safety to a

right angle with the gun body. See Fig. 1.

2. To unlock the gun trigger safety, push the safety

out and turn it parallel with the gun body.

See Fig. 1.

Pressure Relief Procedure

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.

WARNING

1. Lock the gun trigger safety.

2. Shut off the power to the pump.

3. Unlock the gun trigger safety.

4. Hold a metal part of the gun firmly to a grounded

metal pail. Trigger the gun to relieve pressure.

5. Lock the gun trigger 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.

If you suspect that the spray tip or hose is completely

clogged or that pressure has not been fully relieved,

very slowly loosen the tip guard retaining nut or hose

end coupling and relieve pressure gradually. Clean the

tip or hose obstruction.

Fig. 1

Gun trigger safety shown locked

Gun trigger safety shown unlocked

03966

3084916

Installation/Operation

How to Operate the Gun

WARNING

To reduce the risk of component rupture, and seri-

ous injury, including fluid injection, do not exceed

the gun’s 4000 psi (276 bar, 27.6 MPa) Maximum

Working Pressure or the maximum working pres-

sure of lowest rated component in the system.

04731

Fig. 2

1. Connect an electrically conductive fluid hose (A) to

the gun inlet. See Fig. 2.

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 i nstructions in the manual, supplied.

See Fig. 2.

5. Start the pump. Trigger the gun onto test paper.

Adjust the fluid pressure until the spray is

completely atomized. Use the lowest pressure

necessary to get the desired results. Higher pres-

sure may not improve the spray pattern and will

cause premature 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. See Fig. 3.

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 increasing fluid pressure.

CAUTION

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.

Fig. 3

03968

308491 7

Installation/Operation

Care of the Spray Tip and Tip Guard

WARNING

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.

Cleaning during the day

WARNING

SKIN INJECTION HAZARD

To reduce the risk of serious injury,

whenever you are instructed to relieve

pressure, follow the Pressure Relief

Procedure on page 5.

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 RAC IV tip

handle back 180_. See Fig. 4.

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. See Fig. 4.

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 manual 308644, supplied with the RAC IV.

CAUTION

Never soak the entire gun in solvent. Prolonged

exposure to solvent can ruin the packings.

Fig. 4

Spraying position shown.

Turn handle 180_and

trigger gun to clear clog.

103965

3084918

Installation/Operation

How to Flush the Gun

WARNING

To reduce the risk of serious injury, including

splashing fluid in the eyes or on the skin, or static

electric discharge when flushing:

DBe sure the entire system, including flushing

pails, are properly grounded.

DRemove the tip guard and spray tip.

DMaintain metal to metal contact between the

gun and the flushing pail.

DUse the lowest possible pressure.

04735

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 compat-

ible 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.

308491 9

Installation/Operation

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.

The diffuser, located in the valve seat, creates an

irregular spray pattern when the gun is sprayed

without a 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.

WARNING

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.

WARNING

SKIN INJECTION HAZARD

To reduce the risk of serious injury,

whenever you are instructed to relieve

pressure, follow the Pressure Relief

Procedure on page 5.

1. Relieve pressure.

2. Remove the tip guard and spray tip.

3. Start the sprayer and adjust it to the lowest

pressure.

4. Aim the gun into a grounded metal pail while hold-

ing it firmly to the pail. Trigger the gun. If the fluid

emitted is not diffused into an irregular stream,

replace the entire needle kit immediately. See Fig.

Fig. 5

1Irregular spray pattern

04735

30849110

Service

To reduce the risk of serious injury from fluid injec-

tion or splashing, always follow the Pressure

Relief Procedure on page 5 before servicing the

gun.

WARNING

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 rec-

ommended 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.

Fig. 6

04731

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.

See Fig. 6.

Fig. 7

2a 2b

03969

3. Unscrew the valve seat (2a). Remove the gasket

(2b). See Fig. 7.

Fig. 8

0473

4. Remove one e-clip (27). Push out the pin (18).

Remove the screw (29), pivot pin (28), and trigger

(25). See Fig. 8.

Fig. 9 24 04733

5. Remove the screws (24). See Fig. 9.

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