Graco Inc 311937E User Manual

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G40 Air Assisted Spray Gun

Maximum Working Pressure: 4000 psi (280 bar, 28 MPa)

Maximum Air Working Pressure: 100 psi (7 bar, 0.7 MPa)

311937E

Model: 288513, 289604

IMPORTANT SAFETY INSTRUCTIONS. Refer to yoursprayer instruction manual for Pressure Relief, priming and

spray instructions. Keep these instructions.

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- For the application of architectural paints and coatings -

The following Warnings are for the setup, use, grounding, maintenance and repair of this equipment. The exclamation point symbol alerts you to a general warning and hazard symbols refer to procedure-specificrisks. Refer back to these Warnings. Additional,product-specificwarnings may be found throughout the body of this manual where applicable.

Instructions/Parts

WARNINGS

SKIN INJECTION HAZARD

High-pressurefluid from gun, 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 gun at anyone or at any part of the body.

Do not put your hand over the spray tip.

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

Do not spray without tip guard and trigger guard installed.

Engage trigger lock when not spraying.

Follow Pressure Relief Procedurein this manual, when you stop spraying and before cleaning, checking, or servicing equipment.

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:

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 arc).

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.

Ground all equipment in the work area. See Grounding instructions.

Use only grounded hoses.

Hold gun firmly to side of grounded pail when triggering into pail.

If there is static sparking or you feel a shock, stop operation immediately. Do not use equipment until you identify and correct the problem.

Keep a working fire extinguisher in the work area.

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 forms from distributor or retailer.

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.

PRESSURIZED ALUMINUM PARTS HAZARD

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

ids containing such solvents in pressurized aluminum equipment. Such use can cause serious chemical reaction and equipment rupture, and result in death, serious injury, and property damage.

PERSONAL PROTECTIVE EQUIPMENT

You must wear appropriate protective equipment when operating, servicing, or in the operating area of the equipment to help protect you from serious injury. This equipment includes but is not limited to:

Protective eyewear

Clothing and respirator as recommended by the fluid and solvent manufacturer

Gloves

Hearing protection

Graco Inc. P.O. Box 1441 Minneapolis, MN 55440-1441

Copyright 2007, Graco Inc. is registered to I.S. EN ISO 9001

Pressure Relief Procedure

Follow this Pressure Relief Procedure whenever instructed to relieve pressure, stop spraying, check or service equipment, or install or clean spray tip.

1.Lock trigger. Turn OFF power and turn pressure control to lowest pressure setting.

2.Unlock trigger. Hold gun against side of flushing pail. Trigger gun into pail to relieve pressure.

If you suspect spray tip or hose is clogged or that pressure has not been fully relieved after following the steps above,VERY SLOWLY loosen tip guard retaining nut or hose end coupling to relieve pressure gradually, then loosen completely. Clear hose or tip obstruction.

Gun Trigger Lock

To prevent injury when the gun is not in use, always lock the trigger if unit is being shut down or left unattended.

Trigger Locked

Trigger Unlocked

(no spray)

(spray)

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Setup

Make sure sprayer is turned off and unplugged from power source and trigger lock is locked. Refer to your sprayer instruction manual for priming and spray instructions.

Connect Gun to Sprayer

1. Attach air inlet fitting (17) and fluid inlet fitting (25) to gun.

 

17

 

25

 

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2. For Air-Assistedspraying,first

17

attach black, coiled, air supply hose (a)

 

to gun air inlet fitting (17).

 

NOTE: The first time you set up the gun

 

for spraying you will have to cut the

a

black air hose to length desired.

 

 

ti9022a

3.Attach blue fluid supply hose (b) to gun

fluid inlet fitting(25).

25

4. Attach other end of air and fluid supply

 

hoses to sprayer. Use two wrenches to

b

tighten all connections securely (see

sprayer setup instructions in sprayer

 

operation manual 311905.)

 

Installing Tip (33) and Guard (6) on Gun

1.If equipment has recently been operated, relieve pressure.

2.

Insert seat housing (35)

6

35

 

into guard (6).

 

 

 

 

3.

Insert SwitchTip (33).

 

33a 33b

4.

Insert seal (33b) over seat

 

 

(35a) and insert in seat

 

 

 

housing (25). Use black

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33

seal for water-basedmaterials and orange for solvent andoil-basedmaterials.

5.Install guard (6) over end of gun. Hand tighten.

If you notice fluid leaking from front of gun, replace the seat (33a) and/or retighten the guard nut.

Operation

Note: The following instructions are for guns used with Graco’s FinishPro Sprayers. See the sprayer instruction manual 311905. If you are using a different sprayer, see your equipment instruction manual.

If you are using a FinishPro390 Model Sprayer, air

regulation is only provided at the gun. The FinishPro395 Model Sprayers provide additional air regulation at the sprayer.

1.Unlock trigger (1a).

2.Be sure the arrow shaped tip (33) faces forward (spray).

3.Hold gun perpendicular and approximately 12-inches(304 mm) from surface. Move gun first, then pull gun trigger (3) to spray a test pattern.

4.Always hold gun at a right angle from the surface. Do not make an arc with the gun. This causes an uneven coat of fluid. To obtain an even finish, use smooth, even strokes across the object being sprayed with a 50% overlap.

Clearing a Clog

1.Relieve pressure. Lock trigger (1a).

2.Rotate tip (33) 180°. Unlock trigger (1a). Trigger gun into pail or onto ground to remove clog.

3.Lock trigger (1a). Rotate tip (33) 180° back to spray position.

2

311937E

Spraying

Flushing and Cleaning

Refer to your Sprayer Instruction manual. The following instructions are for guns used with Graco’s FinishPro Sprayers.

Air-AssistedSpraying

1.Set sprayer function selection switch to AIRLESS spraying.

2.Open gun air pressure regulator all the way.

3.Prime pump following priming instructions provided in sprayer operation manual 311905.

4.Turn sprayer fluid pressure control to highest setting.

5.Unlock trigger (1a). While triggering gun, turn down sprayer fluid pressure until you notice tails forming in spray pattern.

6.Stop triggering gun.

7.Set sprayer toggle switch to AA (Air Assisted) spraying.

8.Trigger gun. While spraying increase gun air pressure regulator until tails disappear.

9.Use gun air regulator to fine tune spray pattern.

Airless Spraying

1.Set sprayer function selection switch to AIRLESS spraying.

2.Prime pump following priming instructions provided in sprayer operation manual 311905.

3.Start with sprayer pressure turned to lowest setting.

4.Spray a test pattern. Gradually increase sprayer pressure until you achieve a consistent spray pattern, without heavy edges. Use a smaller tip if pressure adjustment alone does not eliminate edges.

Note: If you are getting an irregular spray pattern, clean air holes with solvent and a soft brush or toothpick. Do not use metal tools to clean the air cap holes as

this may scratch them. Scratches can

TI8792a

distort the spray pattern.

Maintenance

Before performing any maintenance on gun, read all warnings on front cover of this manual and relieve pressure, page2.

Daily Maintenance

Flush gun after each work shift and store in a dry location.

Do not immerse the gun or any parts in water or cleaning solvents.

Do not point gun up while cleaning it.

Do not wipe gun with cloth soaked in solvent; wring out excess.

Solvent left in gun air passages could result in a poor quality paint finish. Do not use any cleaning method that may allow solvent into gun air passages.

Flush gun before changing colors, before storing and before repairing gun.

Flush at lowest possible pressure. Check connectors for leaks and tighten as necessary.

Flush with fluid that is compatible with fluid being dispensed and equipment’s wetted parts.

1.Relieve pressure, page2. Unplug sprayer from outlet.

2.Remove tip (33) and guard (6).

3.Disconnect black air supply hose from gun.

4.Remove sprayer siphon tube set from paint and place in flushing fluid. See Cleanup instructions in sprayer operation manual 311905.

5.Plug sprayer in outlet. Set sprayer function selection switch to AIRLESS.

6.Increase pressure slowly. Point gun down into a grounded metal container. Pull gun trigger and flush gun with solvent until all traces of fluid are removed from gun passages.

7.Turn sprayer function selection switch to OFF.

8.Relieve pressure, page 2.

9.Disconnect fluid supply hose from gun.

10.If it is necessary to remove diffuser (5) to clean, trigger gun while you remove the diffuser with the gun tool (30).

11.Dip the soft end of a soft-bristlebrush into a compatible solvent.Do not continuously soak the brush’s bristles with solvent and do not use a wire brush.

12.With gun pointed down, clean front of the gun with the soft-bristlebrush and solvent.

13.Scrub the tip (33) and guard (6) with soft-bristlebrush. To clean out air cap holes, use a soft tool such as a toothpick, to avoid damaging critical surfaces. Blow air through the spray tip to ensure the orifice is clean.

14.If the diffuser (5) was removed, trigger the gun while you reinstall the diffuser with the gun tool (30). Tighten the diffuser securely to obtain a good seal. Torque to 155-165in-lb(18-19N.m). When properly tightened, the flange will bottom out on the gun.

15.Install tip (33) and guard (6) on gun, page 2.

16.Using a soft cloth dampened in solvent, wipe off outside of gun.

17.After cleaning, lubricate the following parts weekly with lubricant 111265.

Trigger pivot pin (A)

Both sides of gun where trigger contacts gun (B)

Fluid needle shaft, behind trigger (C)

A

B

C

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Cleaning/Replacing Filter (24)

1.Relieve pressure, page2. Lock trigger (1a).

2.Unscrew fluid inlet fitting (25).

3.Remove inline fluid filter (24).

311937E

3

4.Clean filter with soft brush and compatible solvent. Inspect filter and if damaged, replace it.

5.Install inline fluid filter (24) into base of fluid tube (16).

6.Screw fluid inlet fitting (25) into base of tube. Torque to 175-185in-lb(20-21N•m).

Repair

Seat Repair

Use Carbide Seat Repair Kit - 249456. For best results use all new parts provided in kit.

1.Relieve the pressure, page2. Remove the fluid and air hoses from the gun.

2.Remove the guard (6) and spray tip (33).

3.Trigger gun to pull the needle housing off the seat while you unscrew the diffuser (5) from the gun body (1), using gun tool (30).

4.Inspect o-rings(5e, 5f, and 6a) in place. Carefully remove theo-ringsfrom the diffuser housing (5a) and replace if necessary.

5.Remove the seat nut (5d), seat (5c) and seat gasket (5b) using a 7/32 in. hex wrench.

6.Inspect seat (5c) and seat gasket (5b) and replace if necessary.

7.Reinstall the seat gasket (5b) seat (5c) and seat nut (5d). Torque to 45-50in-lb(5.0-5.6N•m). Be sure not to overtighten nut.

When reinstalling the carbide seat (5c), the tapered end of the seat must point toward the gun tip.

Needle Repair (2)

1.Relieve pressure, page2. Remove the diffuser (5), see Seat Repair, page4.

2.Remove the trigger pivot pin

nut (14), pivot pin (13), and trigger (3) using the gun tool

(30) and nut driver (29).

13

14

3

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3.Remove the fluid

needle assembly

2a

(2) from the front of

2

the gun by using

 

the nut driver tool

29

(29). If the needle

is bent or

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damaged, or the

 

packing is worn or

leaking, replace the entire needle assembly. If replacement is necessary, be sure to remove the o-ring(2a) as it may stick inside the gun body.

Air Valve Repair (8)

1.Unscrew the spring cap (11) from the back of the gun body (1) using the gun tool (30). Remove the two springs (15 and 19), the shaft (9), and seat (10).

2.Push the air valve assembly (8) out the back of the gun.

3.Inspect the u-cup(7) in the gun body (1). If theu-cupis worn or leaking, carefully remove theu-cupfrom the front of the gun body, using a pick.

8 15

1 7

11

19

10

9

TI6577A

Fluid Tube Replacement (16)

1.Remove the air inlet fitting

(17)using the gun tool (30) and remove the screw (20) using a 3/16 in. hex wrench.

2.Unscrew the fluid inlet fitting

(25).Remove and clean or replace the inline fluid filter

3.Unscrew fluid tube connector (16a) from fluid inlet. Carefully remove gasket (22).

22

17

 

16a

16

Flat Tip Conversion Kit

24

20

(Optional)

 

 

25

 

 

The Flat Tip Conversion Kit allows

ti6573a

 

AAM Flat Tips to be used with this

 

 

gun. Order part number 288514.

 

 

4

311937E

Reassembly

1.Install the tube gasket (22) in the gun. Hand tighten the fluid tube connector (16a) into the gun’s fluid inlet. Antigens the air inlet fitting (17) and screw (20). Torque the fluid tube connector to 150-160in-lb(17-18N•m). Torque the air inlet fitting to175-185in-lb(20-21N•m). Torque the fluid tube bracket screw to50-60in-lb(6-7N•m).

2.Install the inline fluid filter (24) into the base of the fluid tube (16). Screw the fluid inlet fitting (25) into the base of the tube. Torque to 175-185in-lb(20-21N•m).

3.Place the new u-cup(7) on the seal installation tool (28), with theu-cuplips facing the tool. Push theu-cupinto the back of the gun until you feel a definite snap.

3

Lubricate lightly.

8

Lips face out of gun body.

8 3 7

28

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4.Lubricate the front end of the air valve assembly (8). Gently slide the air valve assembly into the back of the gun, passing through the u-cup(7), as far as it will go. Be careful not to damage theu-cup.

5.Slide the seat (10) onto the shaft (9). Be sure that the tapered end of the seat is toward the thicker end of the shaft. Carefully insert the shaft (9) and seat (10) in the air valve (8).

Technical Data

Maximum Working Fluid Pressure

4000 psi

 

(28 MPa, 280 bar)

Maximum Working Air Pressure

100 psi

 

(0.7 MPa, 7 bar)

Maximum Working Fluid Temperature

110° F (43° C)

Fluid inlet

1/4-18npsm

Air Inlet

1/4-18npsm

Gun Weight

16 oz (450 grams)

Sound Pressure*: 20 psi (140 kPa, 1.4 bar)

66.9 dB(A)

Sound Pressure*: 100 psi (0.7 kPa, 7 bar)

80.0 dB(A)

Sound Power*: 20 psi (140 kPa, 1.4 bar)

76.8 dB(A)

Sound Power*: 100 psi (0.7 kPa, 7 bar)

89.9 dB(A)

Wetted Parts: Stainless Steel, Carbide, Ultra High Molecular Weight Polyethylene, Acetal, PTFE, Nylon, Flouroelastomer

*All readings were taken with fan valve fully closed, (full fan size) at 20 psi (140 kPa, 1.4 bar) and 100 psi (0.7 kPa, 7 bar) and at the assumed operator position. Sound Power tested to ISO 9614-2.

6.Install the two springs (15 and 19). Screw the spring cap (11) into the back of the gun body. Torque to 175-185in-lb(20-21N•m).

7.Lightly lubricate the needle assembly o-ringsand shaft where the packing slides. Be sure that theo-ring(2a) is in place in the gun body (1).

8.Insert the fluid needle assembly (2) into the front of the gun. Use the nut driver (29) to screw the fluid needle assembly into the gun body (1) and torque to 50-60in-lb(6-7N•m).

1

2a

2

29

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9.Install the trigger (3), pivot pin (13), and nut (14). Use low strength thread locker and be sure that the brass piece of the fluid needle assembly (2) is behind the trigger.

Lubricate both sides of the pivot pin where the trigger contacts the pin and lubricate the boss on both sides of the gun where the trigger contacts the gun body. Torque the nut to 20-30in-lb(2-3N•m).

10.Trigger the gun to pull the needle back while you screw the diffuser assembly (5) into the gun body (1) using the gun tool (30). Torque to 155-165in-lb(18-19N•m). When properly tightened, the flange will bottom out on the gun.

11.Attach the guard (6) and spray tip (33), page 2.

Tranlated Manuals

Spanish - 311939

Estonian - 311957

 

 

French - 311938

Latvian - 311958

 

 

Dutch - 311941

Lithuanian - 311956

 

 

German - 311950

Polish - 311951

 

 

Italian - 311940

Hungarian - 311954

 

 

Turkish - 311942

Czech - 311953

 

 

Greek - 311943

Slovakian - 311959

 

 

Croatian - 311955

Portuguese - 311944

 

 

Danish - 311948

Finnish - 311946

 

 

Chinese - 311960

Swedish - 311947

 

 

Japanese - 311961

Norwegian - 311949

 

 

Korean - 311962

Russian - 311952

 

 

Translated manuals can be obtained from a distributor or by visiting www.graco.com.

311937E

5

Parts

 

 

 

 

5e

5c

5d

 

 

 

 

 

33b

5a

5f

5b

 

 

 

 

 

 

 

 

 

 

 

 

35

33a

 

 

 

15

 

 

 

 

 

 

 

 

11

 

 

6a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

 

4

8

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

 

13

 

 

 

 

 

 

 

 

 

 

 

19

 

 

33

 

 

 

 

 

9

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

2

2a

 

 

 

 

29

 

 

 

 

 

 

1a

 

 

 

 

 

 

 

 

30

22

 

 

 

 

14

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

16

 

 

 

 

17

 

 

 

 

 

 

 

 

 

 

 

 

 

36

 

 

 

 

 

12

 

 

 

 

 

 

 

 

 

28

 

 

 

24

 

20

 

 

 

 

 

 

 

 

 

 

 

 

 

25

 

 

 

ti7203d

Ref.

Part No.

Description

Qty.

1

 

BODY, gun, assy

1

1a

249423

SAFETY, trigger

1

2

 

NEEDLE, assy; 3/32 carbide ball;

1

 

 

includes item 2a

 

2a*

110004

PACKING, o-ring;PTFE

1

3

249585

KIT, trigger, repair, includes 13 and 14

1

4

15G713

NUT, air plug

1

5

249877

DIFFUSER, assy, RAC

1

5a

 

DIFFUSER, housing

1

5b

 

GASKET, seat; nylon

1

5c

 

SEAT; carbide

1

5d

 

NUT, seat

1

5e*

111457

PACKING, o-ring,seat; PTFE

1

5f*

109450

PACKING, o-ring;PTFE

1

6

288839

GUARD, RAC

1

6a*

109213

PACKING, o-ring,PTFE

1

7*

188493

PACKING, u-cup,gun; UHMWPE

1

8*

 

VALVE, air, assy

1

9

15F193

SHAFT, fluid spring

1

10

15F194

SEAT, spring

1

11

15F195

CAP, spring

1

12

288715

VALVE, swivel with hose fitting

1

13

15F739

PIN, pivot

1

14

15F740

PIN, pivot, nut

1

15

114069

SPRING, compression

1

16

249136

TUBE, assy

1

17

15F202

FITTING, air inlet

1

Ref.

Part No.

Description

Qty.

19

115141

SPRING, compression

1

20

119996

SCREW, cap, socket hd; 1/4-20x 3/8 in.

1

 

 

(10 mm)

 

22*

115133

GASKET, tube, acetal

1

24

224453

FILTER

1

24a‡

162863

GASKET, non-metallic(sold separately)

 

25

15F186

FITTING, fluid inlet

1

28*

 

TOOL, installation; seal

1

29

117642

TOOL, nut driver

1

30

15F446

TOOL, gun

1

31

222385

CARD, warning (not shown)

1

32

172479

TAG, warning (not shown)

1

33

FFT210

SPRAY TIP (288513)

1

 

FFA210

SPRAY TIP (289604)

1

33a

 

SEAT, gasket

1

33b

 

SEAL

1

35†

15J770

HOUSING, cylinder

1

36

239663

SWIVEL

1

Replacement Danger and Warning labels, tags, and cards are available at no cost.

Included in Needle/Seat Repair Kit 255160 (purchase separately)

† Included in RAC Guard Kit 288839

*Included in Seal Repair Kit 249422 (purchase separately)

‡ If you want to remove the filter, order 162863 to use as a seal in its place.

For complete warranty information contact your local Graco distributor, call Graco customer service: 1-800-690-2894or visit our website: www.graco.com.

All written and visual data contained in this document reflects the latest product information available at the time of publication. Graco reserves the right to make changes at any time without notice.

This manual contains English. MM 311937

Graco Headquarters: Minneapolis

International Offices: Belgium, China, Japan, Korea

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

Revised 05/2008