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
3
(5)
4
(6)
5
(8)
6
(10)
7
(11)
8
(12)
9
(14)
10
(16)
11
(18)
12
(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
ti16179a
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.
ti16345a
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16
17
20
18
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16
17
20
18
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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
1
1
ti16792a
Double-Acting
24G980
Single-Acting
238377
1
1
ti16999a

Replacement Parts and Kits (Double Acting Gun 24G980)
308613E 9
Replacement Parts and Kits (Double Acting Gun 24G980)
2
1
20
3
4
11
10
12
13
14
15
16
17 18
19
18
9
24
6
5
23
ti16354a
25
8
27
(Not included)
26
(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
22
17
14
5
6
15
13
12
11
9
8
21
7
10
3
2
1
20
19
4
16
18
28
(Not included)
26
(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.