Graco 287834 Manual de instrucciones

311485J

Operation

Displacement Pump

- Use with Architectural Coatings, Paints, Roof Coatings

and Below Grade Coatings -

Model 287834

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

Important Safety Instructions

Read all warnings and instructions in this

manual. Save these instructions.

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Warnings

2311485J

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.

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 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.

MOVING PARTS HAZARD

Moving parts can pinch, cut 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 and disconnect all power sources.

Operation

311485J 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 following the steps above, VERY SLOWLY, loosen

tip guard retaining nut or hose end coupling to relieve

pressure gradually, 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

4311485J

Service

Removal

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

sible.

2. Perform Pressure Relief Procedure, 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).

7. Slide cover (124) up.

ti7597b

147

ti7845b

ti7119b

110

ti7789b

121

ti7816b

124

Service

311485J 5

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 and clean all parts and o-rings (207).

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

semble as shown.

ti7814b

125

ti7782b

122

ti7804b

ti7875b

213

ti7879b

215

212

207

213

214

209

Shortest Ball Travel Longest Ball Travel

(for light material) (for heavy material)

ti7881a ti7874a

Service

6311485J

Piston Rod Assembly

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.

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).

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.

ti7877a

ti7880a

ti7878a

222

218

203

223

219

206

210

Lips Up

210

206

219

223 203

218

208 222

Lips Up

ti7878a

Torque to 200

ft.-lb (272 N.m)

Service

311485J 7

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 the cylinder throat packings.

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).

222

220

ti7898a

222

220

ti7896a

222

ti7897a

222

207

205

207

ti7895a

217

238

204

222

237 Lips Down

Lips Down

205

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202

201

Service

8311485J

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-lb (475 N•m).

12. Torque packing nut (202) down to 50 ft-lb (68 N•m).

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).

213

212

207

214

215

209

ti7873a

ti7882a

122

ti7779a

ti7817a

122

ti7771a

125

ti7815a

125

124

Service

311485J 9

17. Replace clip pin (121) to secure.

18. Reinstall filter housing (110).

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

121

125

ti7809a

ti7772a

110

ti7764a

147

Parts

10 311485J

Parts

Ref. Part Description Qty.

201* 116385 PLUG 1

202 15G198 NUT, packing 1

203* 15G285 V-PACKING, UHMWPE, blue 3

204* 15H250 GLAND, male, throat 1

205 287836 CYLINDER, pump 1

206* 102972 BALL, sst, 0.875 in. 1

207*† 116377 PACKING, o-ring 3

208 15G196 GUIDE, ball 1

209 197306 SHIM, inlet 3

210 287837 VALVE, piston 1

212† 287838 SEAT, carbide, includes 214 and

207

213 15G195 HOUSING, intake (foo) 1

214*† 108001 BALL, sst, 1.5 in. 1

215 15G199 GUIDE, ball 1

216 15H335 FITTING, nipple, 1 inch NPT 1

217* 15H251 GLAND, female, piston steel 1

218* 15G282 GLAND, male 1

219* 15G283 GLAND, female 1

220 287833 SLEEVE, cylinder 1

222 287832 ROD, piston 1

223* 15G284 V-PACKING, brown 2

237* 184307 PACKING, vee, leather 2

238* 108451 PACKING, vee, (UHMWPE) 3

* These parts are included in repair kit 287835, which

may be purchased separately.

† These parts are also included in Carbide Seat Kit

287838, which may be purchased separately.

Ref. Part Description Qty.

213

212

207

214

215

209

207

220

207

205

210

206

223

219

203

218

208

222

204

238

237

217

202

201

216

Assemble with lips facing up

Assemble with lips facing down

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