Graco 238377 User manual

308613E

ENG

Instructions

Single Acting and Double Acting Paint Spray Guns for

RoadLazer™RoadPak™Line Striping System

- For the application of road marking paints and coatings -

- For professional use only -

Model: 238377 (Single-acting gun)

Model: 24G980 (Double-acting gun)

Maximum Working Pressure 3000 psi (21 MPa, 210 bar)

Important Safety Instructions

Read all warnings and instructions in this

manual. Save these instructions.

ti16339a

05952b

238377 24G980

II 2 G T5

Warnings

2308613E

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, 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.

WARNINGWARNINGWARNING

WARNING

FIRE AND EXPLOSION HAZARD

Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help prevent

fire and explosion:

• Do not spray flammable or combustible materials near an open flame or sources of ignition such as

cigarettes, motors, and electrical equipment.

• Paint or solvent flowing through the equipment is able to result in static electricity. Static electricity

creates a risk of fire or explosion in the presence of paint or solvent fumes. All parts of the spray

system, including the pump, hose assembly, spray gun, and objects in and around the spray area shall

be properly grounded to protect against static discharge and sparks. Use Graco conductive or

grounded high-pressure airless paint sprayer hoses.

• Do not clean with materials having flash points lower than 70° F (21° C). Use water-based material or

mineral spirits-type material only. For complete information about your fluid, request the MSDS from

the fluid distributor or retailer.

• Verify that all containers and collection systems are grounded to prevent static discharge.

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.

• Follow the Pressure Relief Procedure when you stop dispensing and before cleaning, checking, or

servicing equipment.

• Tighten all fluid connections before operating the equipment.

• Check hoses and couplings daily. Replace worn or damaged parts immediately.

Warnings

308613E 3

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 MSDS 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.

• 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 MSDSs 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.

WARNINGWARNINGWARNING

WARNING

Installation

4308613E

Installation

Accessories are available from Graco. Be sure all

accessories are properly sized to withstand the pres-

sures in the system.

Mount Valve

Mount the valve on a 0.50 in. (12.7 mm) diameter rod on

a mounting fixture or a dispensing machine. The paint

gun has a clamping set screw (6) for mounting.

Connect the Air Lines

Clean all lines and connections of dirt, burrs, etc. and

blow them out with clean air before connecting them to

the system. Install an air filter in the air supply line to

remove harmful dirt and moisture from the compressed

air.

Connect Fluid Lines

Connect a grounded fluid line from the pump to the fluid

adapter of the paint spray gun. You should install a fluid

pressure regulator to control fluid pressure to the paint

spray gun. The regulator enables you to control fluid

pressure more accurately than by regulating hydraulic

pressure to the pump.

Install a fluid filter to remove particles and sediment

which may clog the tip.

Install a manual ball valve to shut off fluid flow to spray

gun.

Grounding

Proper grounding is essential to maintaining a safe sys-

tem.

To reduce the risk of static sparking, ground the pump,

paint spray gun, and all other system equipment.

1. Pump: Use a ground wire and clamp.

2. Air compressors and hydraulic power supplies:

Follow manufacturer’s recommendations.

3. Air and fluid hoses connected to the pump: Use

only grounded hoses with a maximum of 500 feet

(150 m) combined hose length to ensure grounding

continuity.

4. Dispensing valve: Obtain grounding through con-

nection to a properly grounded fluid hose and pump.

5. Fluid supply container: According to local code.

6. All solvent pails used when flushing: Ground

according to local code. Use only metal pails, which

are conductive. Do not place the pail on a non con-

ductive surface, such as paper or cardboard, which

interrupts the grounding continuity.

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Double-Acting Gun

Single-Acting Gun

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Operation

308613E 5

Operation

Adjustments

Set the actuating air to at least 75 psi (5.2 bar) and start

the pump. Set the pump speed and pressure to obtain the

desired flow rate. Always use the lowest pump speed nec-

essary to achieve desired results.

Pressure Relief Procedure

1. Shut off the power to the pump.

2. Close the bleed-type master air valve (required with

air-powered pumps).

3. Actuate the dispensing valve to relieve pressure.

4. Open the pump drain valve (required in your system) to

help relieve fluid pressure in the displacement pump.

Actuating the dispensing valve to relieve pressure may

not be sufficient. Have a container ready to catch the

drainage.

5. Leave the drain valve(s) open until you are ready to

dispense again.

If you suspect that the dispensing valve or hose is com-

pletely clogged, or that pressure has not been fully relieved

after following the steps above, very slowly loosen the

hose end coupling and relieve pressure gradually, then

completely loosen. Then clear the valve or hose.

Application Data

FLUID INJECTION HAZARD

To reduce the risk of serious bodily injury, including

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

injury from moving parts, always follow this procedure

whenever you shut off the pump, when checking or

servicing any part of the dispensing system, when

installing, cleaning, or changing part of the valve and

whenever you stop dispensing.

APPLICATION

RECOMMENDATIONS*

TRAVEL SPEED IN MILES PER HOUR (KPH)

Based on 15 mils (.381 mm) wet paint

(5)

(6)

(8)

(10)

(11)

(12)

(14)

(16)

(18)

(19)

Paint Tip Size

For a 4 inch (101 mm)

wide line

433

LL5333

433

LL5333

439 439 443

LL5343

443

LL5343

445 449 453 457

For a 6 inch (152 mm)

wide line

539

LL5439

539

LL5439

543

LL5443

549 559 561 565

For a 12 inch (304 mm)

wide line

643 649

Operating Pressure

psi (bar)

Paint System 1500-2000

(102)

1500-2000

(102)

1500-2000

(102)

1500-2000

(102)

1500-2000

(102)

1500-2000

(102)

1500-2000

(102)

1500-2000

(102)

1500-2000

(102)

1500-2000

(102)

* Coverage may vary depending on paint used.

Maintenance

6308613E

Maintenance

Clean Dispensing Valve and

System Daily

An important part of the care and maintenance of your

automatic dispensing valve is proper flushing. Flush the

valve daily with a compatible solvent until all traces of

fluid are removed from the valve passages. Perform

Pressure Relief Procedure, page 5 before flushing.

Clean the outside surfaces of the valve by wiping with a

soft cloth dampened with a compatible solvent.

To remove a hardened particle from the orifice, blow air

through the orifice from the front.

Oil Dispensing Valve Daily

Before each use, lubricate with a spray of oil inside the

protection tube (13) to prevent fluid buildup on these

parts. Any buildup could damage the valve packings

(16, 17, 18).

Service

Needle, Seat and Packings

To clean or replace the needle, its seat or packings (16,

17, 18), proceed as follows:

1. Perform Pressure Relief Procedure, page 5.

2. Remove valve housing:

a. Remove cap and spring.

b. Loosen nut.

c. Pull down housing and needle assembly to

expose needle shaft.

d. Slide needle through air piston to remove.

3. Remove RAC guard.

NOTICE

Be sure that the solvent you use is compatible with the

fluid being dispensed to avoid clogging the fluid pas-

sages in the valve.

NOTICE

Never immerse the entire dispensing valve in solvent.

Immersing in solvent removes lubricants and can

damage packings.

ti16355a

Double-Acting Gun Single-Acting Gun

5954b

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ti16180a

ti16192a

ti16344a

Service

308613E 7

4. Use an open-end wrench to remove valve seat from

valve housing.

5. Remove gun needle from valve body.

6. Remove packing nut from the valve body.

7. Remove packings (16, 17, 18, 20) from valve body.

8. Clean all parts.

9. Lubricate and install gun needle into valve body.

10. Install packings (16, 17, 18, 20) on gun needle.

11. Install packing nut and hand-tighten into valve body.

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Service

8308613E

12. Install seat valve into valve housing.

13. Install valve body. Tighten nut.

14. Install RAC guard.

Air Piston, Spring and Seal

Perform Pressure Relief Procedure, page 5. Remove

valve as explained on page 6. Remove air cylinder cap,

take out spring and pull out the piston. Clean and

inspect all parts. Check the piston o-rings (see note 1)

carefully. Lubricate all parts with a light waterproof

grease and reassemble with valve using new parts as

necessary.

ti16352a

ti16196a ti16193a

ti16353a

ti16792a

Double-Acting

24G980

Single-Acting

238377

ti16999a

Replacement Parts and Kits (Double Acting Gun 24G980)

308613E 9

Replacement Parts and Kits (Double Acting Gun 24G980)

17 18

ti16354a

(Not included)

Ref. Part Description Qty.

1 243161 GUARD, RAC 1

*2 206987 SEAT, valve 1

3 101748 PLUG, pipe, 3/8 npt 1

4 166470 HOUSING, valve 1

5 166847 HOUSING, valve 1

6 101554 SET SCREW, cup point 1

7 166848 CAP, air cylinder 1

8 16G764 SPRING, helical compression 1

9 16G169 GUIDE, spring 1

10 164741 PISTON, air 1

*11 156593 O-RING, nitrile rubber 1

*12 155685 O-RING, nitrile rubber 1

*13 191195 TUBE, protection 1

14 191174 NUT, packing 1

15 102300 NUT, 9/16-18 nf 1

*16 166255 GLAND, packing 1

*17 166258 PACKING, valve 1

*18 181523 PACKING, valve 2

*19 220194 NEEDLE, gun 1

*20 167730 GASKET, copper 1

21 164737 SCREW, adjusting 1

22 164736 PIN, handle 1

23 FITTING 1

24 FITTING 1

25 C20179 O-RING 1

26 207123 UNION, swivel, 90 deg (not included)

27 24F607 VALVE, ball, 3/8 npt, e-nickel plt

(not included)

* Included in Repair Kit 238399. Order separately.

Ref. Part Description Qty.

Replacement Parts and Kits (Single Acting Gun 238377)

10 308613E

Replacement Parts and Kits (Single Acting Gun 238377)

5953b

(Not included)

Ref. Part Description Qty.

1 243161 GUARD, RAC 1

*2 206987 SEAT, valve 1

3 101748 PLUG, pipe, 3/8 npt 1

4 166470 HOUSING, valve 1

5 166847 HOUSING, valve 1

6 101554 SET SCREW, cup point 1

7 166848 CAP, air cylinder 1

8 114060 SPRING, helical compression 1

9 164740 GUIDE, spring 1

10 164741 PISTON, air 1

*11 156593 O-RING, nitrile rubber 1

*12 155685 O-RING, nitrile rubber 1

*13 191195 TUBE, protection 1

14 191174 NUT, packing 1

15 102300 NUT, 9/16-18 nf 1

*16 166255 GLAND, packing 1

*17 166258 PACKING, valve 1

*18 181523 PACKING, valve 2

*19 220194 NEEDLE, gun 1

*20 167730 GASKET, copper 1

21 164737 SCREW, adjusting 1

22 164736 PIN, handle 1

26 207123 UNION, swivel, 90 deg (not included)

28 238694 VALVE, ball (not included)

* Included in Repair Kit 238399. Order separately.

Ref. Part Description Qty.

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