Graco Series A Guida all'installazione

ti6177a

Repair

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

Displacement Pump 310894G

- For portable spray application of architectural paints and coatings

or replacement pump for Graco GMax

II sprayers -

3300 psi (228 bar, 22.8 MPa) Maximum Working Pressure

Model 287512, Series A

GMax II 3900 Sprayer,

Rental Pro 360G

Model 287513, Series A

GMax II 5900 Sprayer,

UltraMax II 1095/1595 with ProConnect

Model 287579, Series A

GMax II 5900HD Sprayer

Model 249122, Series A

GMax II 7900 Sprayer,

Ultra Max II 1895

Model 287928, Series A

Mark VtInternational

Model 287929, Series A

Mark V North America

Model 289590, Series A

TexSpray 7900HD,

Mark X, 230V, Domestic

Important Safety Instructions

Read all warnings and instructions in this manual

and in your sprayer manual. Save these

instructions.

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2 310894

Table of Contents

Warnings 2......................................

Service 3.......................................

Technical Data 9.................................

Parts, Pump

287512 10.....................................

287513 11.....................................

249122 12.....................................

287579 13.....................................

287928 14.....................................

287929 15.....................................

289590 16.....................................

Warranty 18.....................................

Graco Phone Number 18..........................

Warnings

Warning Symbol

WARNING

This symbol alerts you to the possibility of serious

injury or death if you do not follow the instructions.

Caution Symbol

CAUTION

This symbol alerts you to the possibility of damage to

or destruction of equipment if you do not follow the

instructions.

WARNING

INSTRUCTIONS

EQUIPMENT MISUSE HAZARD

Misuse can cause death or serious injury.

DDo not exceed the maximum working pressure temperature rating of the lowest rated system

component. See Technical Data in all equipment manuals.

DUse fluids and solvents compatible with equipment wetted parts. See Technical Data in all equip-

ment manuals. Read manufacturer fluid and solvent warnings.

DCheck equipment daily. Repair or replace worn or damaged parts immediately.

DDo not alter or modify equipment.

DRead all instruction manuals, tags, and labels before operating the equipment.

DUse equipment only for its intended purpose. Call your Graco distributor for information.

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

fluids containing such solvents in pressurized aluminum equipment. Such use could result in a

chemical reaction, with the possibility of explosion.

DComply with all applicable safety regulations.

MOVING PARTS HAZARD

Moving parts can pinch or amputate your fingers.

DKeep clear of moving parts.

DDo not operate equipment with protective guards or covers removed.

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

follow the Pressure Relief Procedure on page 3. Disconnect power cord.

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3310894

Service

Pressure Relief Procedure

WARNING

PRESSURIZED EQUIPMENT H

The system pressure must be manually

relieved to prevent the system from

starting or spraying accidentally. To

reduce the risk of an injury from accidental spray

from the gun, splashing fluid, or moving parts,

follow the Pressure Relief Procedure whenever

you:

Dareinstructedtorelievethepressure,

Dstop spraying,

Dcheck or service any of the system equipment,

Dor install or clean the spray nozzle.

1. Lock gun trigger safety.

2. Turn engine ON/OFF switch to OFF.

3. Move pump switch to OFF and turn pressure

control knob fully counterclockwise.

4. Unlock trigger safety. Hold metal part of gun firmly

to side of grounded metal pail, and trigger gun to

relieve pressure.

5. Lock gun trigger safety.

6. Open pressure drain valve. Leave open until ready

to spray again.

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 loos-

en tip guard retaining nut or hose end coupling to re-

lieve pressure gradually, then loosen completely. Now

clear tip or hose.

Pump Repair Kits

Pump Repair Kit

287512 248212

287513 248213

287579 248213

249122 249123

287928 249189

287929 248213

289590 249123

Tools Needed

Vise

12 in. adjustable, open end wrench (2)

Hammer, 20 oz maximum

Small screwdriver

Throat Seal Liquid

Pick or long small screwdriver

Cleaning and Inspecting Parts

1. Clean and inspect parts. Pay particular attention to

the ball seats in the intake valve and piston, which

must have no nicks or wear, and to the inside of

the sleeve and the outside of the piston rod, which

must not be worn or scratched. Replace worn or

damaged parts.

WARNING

COMPONENT RUPTURE HAZARD

Never use sharp or pointed tools to

remove sleeve or other components

which could result in pump rupture and

cause serious bodily injury. If the sleeve cannot be

removed easily, return the sleeve and cylinder to

your Graco distributor for removal.

2. Remove and clean the sleeve when you are

repacking the pump.

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4 310894

Service

Disassembling the pump

Fig. 1. Remove packing nut (202) and throat adjust-

ment spacer (228).

Fig. 1

228

202

ti6178b

Fig. 2. Unscrew intake valve from cylinder.

ti6179a

Fig. 2

Fig. 3. Disassemble intake valve. Clean and inspect.

O-ring (227) may require a pick for removal.

Fig. 3

227

7570e

211

used on

249122,

289590

Fig. 4. Tap piston rod out of cylinder with a hammer or

flip over and tap piston rod out against a bench.

Note: Sleeve may come out

of cylinder with piston rod.

ti6180a

Fig. 4

Fig. 5. Remove piston rod from sleeve, or remove

sleeve from cylinder.

ti6181a

Fig. 5

5310894

Service

WARNING

COMPONENT RUPTURE HAZARD

Do not clean or wipe the 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.

Fig. 6. Unscrew piston valve from piston rod. Clean

and inspect parts. The piston has a special thread

locking/sealing patch. Do not remove the patch. The

patch allows four disassembly/assembly procedures

before it is necessary to apply Loctiterto the threads.

ti6183a

Fig. 6

Fig. 7. Remove packings and glands from piston rod.

Not

used on

287512

ti6184a

Fig. 7

Fig. 8. Remove throat packings and glands from cylin-

der. Discard throat packings and glands.

Not used

287512

ti6182a

Fig. 8

Assembling the pump

Fig. 9. Soak all leather packings in SAE 30W oil for 1

hour minimum prior to assembly. Stack male gland

(204) on piston rod. Alternately stack UHMWPE (208)

and leather (218) packings (note orientation) on piston

rod. Install female gland (217). Install piston wiper

(216) (note orientation) and backup washer (229) on

piston valve (210). The special sealing patch on piston

valve threads is good for four repackings. Use Loctiter

on piston valve threads after four repackings.

Not

used on

287512

ti6185a 217

216

210

229

218 208204

Fig. 9

Note: pump 249122 and 289590 do not use

leather packings in piston stack. Alternately

stack blue (208) and brown (218) packings

on this pump.

6 310894

Service

Fig. 10. Install ball (206) in piston rod. If Loctiteris ap-

plied to piston valve threads, ensure that none gets on

ball.

ti6186a

Fig. 10

206

Fig. 11. Tighten piston valve to piston rod as specified:

ti6187a

Fig. 11

Torque to 27 +/--3 ft-lb

(36.61 +/-- 4.06 N•m)

(287512)

Torque to 55 +/--3 ft-lb

(74.57 +/-- 4.06 N•m)

(249122, 287513,

289590)

Fig. 12. Soak all leather packings in SAE 30W oil for 1

hour minimum prior to assembly. Place male gland

(204) in cylinder. Alternately stack UHMWPE (203) and

leather packings (223) (note orientation). Place female

gland (224) in top of cylinder. Seat packings.

Fig. 12

203

224

223

204

Not

used on

287512

ti6188a

Fig. 13. Install seal (201) into packing nut (202). Install

throat adjustment spacer (228) onto packing nut.

Loosely install packing nut into cylinder.

Fig. 13 ti6189a

201

202

228

(228 o--ring

on 249122,

289590 )

7310894

Service

UTION

Never slide piston assembly (222) into top of

sleeve (220) as this may damage piston packings.

Fig. 14. Grease o-rings (221) and place inside

cylinder (205) and on sleeve (220). Slide sleeve (220)

into bottom of cylinder (205). Replace o-ring (207) if

desired.

Fig. 14 ti6193a

221

207

205

220

Place inside cyl-

inder (205) and

push to shoulder

with sleeve (220).

Note: O-ring (207) is not required for safe pump opera-

tion.

Fig. 15. Grease top inch or two of piston rod (222) that

goes through the sleeve/cylinder assembly throat

packings (205). Grease piston packings at bottom of

piston rod.

Carefully slide piston assembly (222) into bottom of

sleeve/cylinder assembly (205) until pump rod pro-

trudes at the top and piston packings are totally inside

the sleeve (220).

Fig. 15

222

ti6273a

205

207

8 310894

Service

Fig. 16. Reassemble intake valve with new o-ring

(227), seat (212) and ball (214). Seat may be flipped

over and used on other side. Clean seat thoroughly.

ti6197a

Fig. 16

227

212

214

211

used on

249122,

289590

Fig. 17. Install intake valve on cylinder. If a wrench is

used torque as follows:

70 +/--5 ft-lb (94.91 +/-- 6.77 N•m) (Model 287512)

80 +/--5 ft--lb (108.5 +/-- 6.77 N•m)

(Model 287513, 287579 )

200 +/--15 ft--lb (271.2 +/-- 20.34 N•m)

(Model 249122, 289590 )

If a wrench is not used, be sure intake valve is bot-

tomed out against cylinder.

ti6194a

Fig. 17

Fig. 18. Torque packing nut (202) down onto adjust-

ment spacer (228) 140 +/--10 in-lb (15.82 +/-- 1.13

N•m).

Remove throat adjustment spacer (228) when pump

packings begin to leak after much use. Then tighten

packing nut down until leakage stops or lessens. This

allows approximately 100 gallons of additional opera-

tion before a repacking is required.

Fig. 18

202

228

ti6195a

(228 o--ring

on 249122,

289590)

9310894

Service

Cross Sectional Reference

Pump 287512

ti6196a

Pump 287512

Fig 19

223 203

218 208

217

213

214

204

221

224

205

219

215

212

227

222

202

221

216

206

210

201

220

228

207

229

V-MaxtUHWMPE, blue

Leather

V-MaxtUHWMPE,

brown on 249122,

289590

211

Only on

249122,

289590

Technical Data

Maximum working pressure 3300 psi...............

(228 bar, 22.8 MPa)

Fluid inlet size 1-5/16 npt(m)......................

Fluid outlet size 3/8 npt(f).................

Wetted parts stainless steel, PTFE,.................

leather, nylon, zinc-plated carbon steel,

tungsten carbide, brass, fluoroelastomer,

acetal, polyethylene

NOTE: LoctiteRis a Loctite Company registered

trademark.

10 310894

Parts -- Pump 287512

Model 287512, Series A

Ref

No. Part No. Description Qty.

201 179810 SEAL, throat 1

202 193046 NUT, packing 1

203* 192692 V-PACKING, throat, 3

V-MaxtUHMWPE, blue

204* 15C987 GLAND, male, throat 1

205 287551 CYLINDER, pump

206* 105444 BALL, sst, 0.3125 in. 1

207* 114054 PACKING, o-ring 1

208* 192693 V-PACKING, piston 3

V-MaxtUHMWPE, blue

210 239932 VALVE, piston 1

212† 239922 KIT, seat, carbide 1

includes 214 and 227

213 15C785 VALVE, intake (foot) 1

214*† 105445 BALL, sst, 0.5000 in. 1

215 192624 GUIDE, ball 1

216* 118503 WIPER, piston 1

217* 178969 GLAND, female, piston 1

218* 178939 V-PACKING, leather, piston 2

219* 196880 GLAND, male 1

220 248209 SLEEVE, cylinder 1

221* 108526 O-RING, PTFE 2

222 248206 ROD, piston 1

223* 178940 V-PACKING, leather, throat 2

224* 15C988 GLAND, female

227*† 107079 PACKING, o-ring 1

228 192714 SPACER, throat, nut 1

229* 15C997 WASHER, backup 1

230†† 15E802 FITTING, pump (not shown) 1

231 118494 O-RING, acetal 1

232†† 15E807 TUBE, intake (not shown) 1

* These parts are also included in Repair Kit 248212,

which may be purchased separately.

†These parts are also included in Carbide Seat Kit

239922, which may be purchased separately.

†† These parts are included with pump 287512.

ti5491a

*223

216*

201

202

224*

203*

204*

205

221*

220

222

206*

219*

218*

217*

210

215

212†

213

†*214

*208

221*

207*

†*227

228

229

231

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