Graco 287834 User manual

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

- Use with Architectural Coatings, Paints, Roof Coatings

and Below Grade Coatings -

4000 psi (27.6 MPa, 275.8 bar) Maximum Working Pressure

Model: 287834

Related Manuals

Important Safety Instructions. Read all

warnings and instructions in this manual. Save

these instructions.

311279

311283

311484

311254

ti7629a

311485D

Instructions

Displacement Pump

Warning

2311485D

Warning

The following are general warning related to the safe setup, use, grounding, maintenance and repair of this equipment.

Additional, more specific warnings may be found throughout the body of this manual where applicable. Symbols ap-

pearing in the body of the manual refer to these general warnings. When these symbols appear throughout the man-

ual, refer back to these pages for a description of the specific hazard.

WARNING

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 Manu-

facturer’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.

MOVING PARTS HAZARD

Moving parts can pinch or amputate fingers and other body parts.

• Keep clear of moving parts.

• Do not operate equipment with protective guards or covers removed.

• Pressurized equipment can start without warning. Before checking, moving, or servicing equipment,

follow the Pressure Relief Procedure in this manual. Disconnect power or air supply.

Operation

311485D 3

Operation

Pressure Relief Procedure

1 Set pump valve OFF. Turn engine OFF.

2 Turn pressure to lowest setting. Trigger gun into pail to relieve pressure.

3 Open prime valve (vertical).

If you suspect that the spray tip or hose is completely clogged, or that pressure has not been fully relieved after fol-

lowing the steps above, VERY SLOWLY, loosen tip guard retaining nut or hose end coupling to relieve pressure grad-

ually, then loosen completely. Then clean tip and hose.

System pressure must be manually relieved to prevent

it from starting or spraying accidentally. Fluid under

high pressure can be injected into the skin and cause

serious injury. To reduce risk of injury from injection,

follow this procedure whenever you are instructed to

relieve pressure, stop spraying, service equipment or

install or clean spray tip. Read warnings, page 2.

TIA

Service

4311485D

Service

Removal

1. Flush pump (36). Stop pump on down stroke if

possible.

2. Relieve pressure, page 3.

3. Remove suction set (147) from pump (36).

4. Remove paint and drain lines from filter housing.

5. Using a wrench, loosen filter housing fitting (110)

and remove housing from pump.

6. Using a pliers, remove clip (121).

147

ti7845a

ti7119

110

ti7789

121

Service

311485D 5

7. Slide cover up (124).

8. Separate coupling (125) and remove.

9. Using a hammer, loosen jam nut (122). Unscrew

pump (36) from power head.

10. Remove pump (36).

Ball Adjustment

1. Using a hammer, loosen and remove intake valve

(213).

2. Disassemble. Clean all parts and inspect o-rings

(207).

ti1816a

124

ti1814a

125

ti7782a

122

ti7804a

213

ti7875a

213

212

207

214

215

209

ti7879a

Service

6311485D

3. Select proper ball travel for material sprayed. Reas-

semble as shown.

Piston Rod Disassembly

1. Tap piston rod out of cylinder with a hammer or flip

over and tap piston rod out against bench. NOTE:

Sleeve may come out of cylinder with piston rod.

2. If piston rod and sleeve did not separate, invert pis-

ton rod (222) and sleeve (220) and pound on hard

surface until piston rod comes out of sleeve.

3. Hold piston valve (210) securely in vice. Using a

wrench, separate piston valve (210) from rod (222).

4. Remove parts. Note orientation of parts for reas-

sembly.

5. Clean all parts with a compatible solvent and

inspect them for wear or damage. Replace any worn

parts.

Component Rupture Hazard. Do not clean or wipe

piston valve threads. Cleaning the piston valve threads

could destroy the special sealing patch and cause the

piston valve to come loose during operation, causing

pump bursting and possible serious bodily injury.

Shortest Ball Travel Longest Ball Travel

ti7881a ti7874a

(for light material) (for heavy material)

ti7877a

222

210

ti7880a

222

218

203

223

219

206

210

Lips Up

ti7878a

Service

311485D 7

Reassembly

1. Soak all leather packings (237) in SAE 30W oil for at

least 1 hour prior to assembly.

2. Alternately stack V-Packings (203) and V-Packings

(223).

3. Grease piston rod (222) packings and top edge of

sleeve (220).

4. Carefully slide piston rod assembly (222) into top

edge of sleeve (220).

5. Grease top inch or two of piston rod (222) that will

go through he cylinder throat packings.

210

206

219

223 203

218

208 222

Lips Up

ti7878a

Torque to 200

ft.-lbs (272 N.m)

222

220

222

220

222

Service

8311485D

6. Grease o-ring (207) and place on sleeve. Slide one

o-ring (207) inside cylinder (205). Slide sleeve/pis-

ton rod assembly (222) into bottom of cylinder.

7. Install male gland (204) in cylinder (205).

8. Alternately stack UHMWPE packings (238) and

leather packings (237) (note orientation).

9. Place female gland (217) in top of cylinder. Loosely

install packing nut (202) and plug (201).

10. Reassemble intake valve (213) as shown.

11. Place intake valve (213) assembly in vice. Install

cylinder (205) assembly to intake valve. Torque to

350 ft.-lbs (475 N•m).

12. Torque packing nut (202) down to 50 ft.-lbs (68

N•m).

222

207

205

207

217

238

204

222

237 Lips Down

Lips Down

205

ti7884a

202

201

213

212

207

214

215

209

ti7873a

ti7882a

Service

311485D 9

13. Screw jam nut (122) to bottom of pump threads

(36). Screw pump completely up into power head.

14. Hand tighten jam nut (122). Then tighten securely

1/8 to 1/4 turn with hammer or torque to 330 ft-lb

(447.4 N•m).

15. Install coupling (125) around pump rod.

16. Slide cover (124) over coupling (125).

17. Replace clip pin (121) to secure.

122

ti7779a

ti7817a

122

ti7771a

125

ti7815a

125

124

121

125

ti7809a

Service

10 311485D

18. Reinstall filter housing (110).

19. Connect suction hose (147) to pump outlet (36).

ti7772a

110

ti7764a

147

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