Graco Husky 715 Manuale utente

308–781

Rev. A

First

choice when

quality counts.



7323A

INSTRUCTIONS-PARTS

LIST

INSTRUCTIONS

This

manual contains important

warnings and information.

READ AND KEEP FOR REFERENCE.

Husky

715 T

exture Pump

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

Model

239–421, Series A

U.S.

Patent Nos. 4,789,131 and 4,867,653

Other U.S. and Foreign Patents Pending

Table

of Contents

Warnings 2.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation 4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance 5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting 6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service

– Air V

alve 7.

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service

– Duckbill V

alves 12.

. . . . . . . . . . . . . . . . . . . . . .

Service

– Diaphragm

13.

. . . . . . . . . . . . . . . . . . . . . . . . .

Parts

List

16.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts

Drawing

17.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical

Data

19.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Graco

arranty 20.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Graco

Phone Number

20.

. . . . . . . . . . . . . . . . . . . . . . . . .

GRACO INC. P.O. BOX 1441

MINNEAPOLIS, MN

55440–1441

COPYRIGHT

1997, GRACO INC.

Graco

Inc. is registered to I.S. EN ISO 9001

 

Symbols

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

Equipment

misuse can cause the equipment to rupture or malfunction and result in serious injury

This equipment is for professional use only

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

Use the equipment only for its intended purpose. If you are not sure, call your Graco distributor

Do not expose the system to rain. Always store the system indoors.

Do not alter or modify this equipment.

Check equipment daily

. Repair or replace worn or damaged parts immediately

Do not exceed the maximum working pressure of the lowest rated component in your system. This

equipment has a

100 psi (0.7 MPa, 7 bar) maximum working pressure at 100 psi (0.7 MPa,

7 bar) maximum air pressure.

The system is for use only with water-based simulated acoustic and wall texture materials.

Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the

Tech-

nical Data

section of all equipment manuals. Read the fluid and solvent manufacturer

’

s warnings.

Do not use hoses to pull equipment.

Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose

Graco hoses to temperatures above 82

C (180

F) or below –40

C (–40

_F).

Do not lift pressurized equipment.

Comply with all applicable local, state, and national fire, electrical, and safety regulations.



WARNING

TOXIC FLUID HAZARD

Hazardous

fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin,

inhaled, or swallowed.



Know the specific hazards of the fluid you are using.



Store hazardous fluid in an approved container

. Dispose of hazardous fluid according to all local,

state and national guidelines.



Always wear protective eyewear

, gloves, clothing and respirator as recommended by the fluid and

solvent manufacturer



Pipe and dispose of the exhaust air safely

, away from people, animals, and food handling areas. If

the diaphragm fails, the fluid is exhausted along with the air

FIRE AND EXPLOSION HAZARD

Improper

grounding, poor ventilation, open flames or sparks can cause a hazardous condition and

result in a fire or explosion and serious injury



Ground the equipment. See the

Grounding

section in instruction manual 308–718.237683



If there is any static sparking or you feel an electric shock while using this equipment,

stop pump-

ing immediately

Do not use the equipment until you identify and correct the problem.



Provide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid

being pumped.



Keep the work area free of debris, including solvent, rags, and gasoline.



Electrically disconnect all equipment in the work area.



Extinguish all open flames or pilot lights in the work area.



Do not smoke in the work area.



Do not turn on or of

f any light switch in the work area while operating or if fumes are present.



Do not operate a gasoline engine in the work area.

4 308-781

Operation

See your system manual for operating instructions.

5308-781

Maintenance

WARNING

PRESSURIZED EQUIPMENT HAZARD

The equipment stays pressurized until pressure is

manually relieved. To reduce the risk of serious

injury from pressurized fluid, accidental spray from

the gun or splashing fluid, follow this procedure

whenever you



Are instructed to relieve the pressure



Stop pumping



Check or service any system equipment



Install or clean the spray nozzle

Pressure Relief Procedure

1. Shut

f the system.

2. T

rigger the gun.

Open the gun air valve, if so equipped.

Disconnect the power source.

Daily checks

Before

each use, check all hoses for wear or damage

and replace as necessary

. Be sure hose connections

are tight and leak-free.

Pump lubrication

After

every 50 hours of fluid pumped, or every month,

remove the quick-disconnect hose from the pump air

inlet (A). Add two drops of machine oil into the air inlet.

Refer to Fig. 1.

Tighten pump’s threaded

connections every six months

Remove

the pump from the cart and thoroughly check

and tighten all threaded connections.

When tightening the clamps (109), apply thread

lubricant to the bolts, and

be sure

to torque the nuts

10) to 75 to 85 in-lb (8.5 to 9.6 N.m). See Fig. 1.

orque the manifold bolts (105) and the adaptor bolts

(59) to 3 to 6 ft-lb (4 to 8 N-m).

110

Key

Air inlet

110

Clamp nuts

109 Clamps

Add

two drops of machine

oil into air inlet every 50

hours.

109

Apply thread lubricant to

bolts, and torque the nuts

10) to 75 to 85 in-lb

(8.5 to 9.6 N.m).

Fig.









7324A

105 

Torque

to 3 to 6 ft-lb

(4 to 8 N-m).



6 308-781

Troubleshooting

WARNING

reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the

Pressure Relief Procedure

on page 5.

See the

Troubleshooting

section of instruction manual 308–718 before you proceed with the table below

. Check

all possible problems and causes before you disassemble the pump.

PROBLEM CAUSE SOLUTION

Pump will not cycle, or cycles once

and stops.

Air valve (200) is stuck or dirty.

Disassemble, clean, and lube air valve.

See page 9.

Broken or damaged springs (209, 212)

and/or valve cup (210) and plate (13).

Repair or replace components, or re

place complete air valve (kit 237–683).

See page 7.

orn or broken detent link (213).

Replace detent link and ball (207), or

complete air valve (kit 237–683).

Pump cycles at stall, or fails to hold

pressure at stall.

Leaky duckbill valves (52).

Repair or replace.

See page 12.

Excessive air leakage from exhaust

port, or air exhausts at stall.

orn air valve cup (210) or plate (13). Repair or replace.

See page 9.

orn shaft seals (30).

Repair or replace.

See page 14.

Pump operates erratically

. Sticky or leaking duckbill valves (52).

Repair or replace.

See page 12.

Air bubbles in fluid.

Suction line is loose.

Tighten.

Diaphragm (60) is ruptured.

Replace.

See page 13.

Loose manifold (102) or adapters (57)

ighten bolts (59, 105).

See page 5.

Manifold o-rings (50) or adapter o-rings

(53) are leaking.

Replace.

See page 12.

Loose outer diaphragm plates (1

18). T

ighten.

See page 14.

Fluid in exhaust air

Diaphragm (60) is ruptured, or dia

phragm plates (1

18, 1

16) are loose or

cracked.

Replace diaphragm and/or tighten

plates.

See page 14.

Pump exhausts air from clamps.

Clamps (109) are loose.

ighten clamps.

See page 5.

Pump exhausts air near air valve.

Air valve screws (10) are loose. Tighten screws.

See page 7.

Air valve o-ring (201) is damaged.

Inspect; replace.

See page 8.

Pump leaks fluid from check valves.

Adaptors (57) are loose.

ighten bolts (59).

See page 12.

orn or damaged o-rings (50).

Inspect; replace.

See page 12.



Pump

Repair – Air V

alve

Replacing the Air Valve

WARNING

reduce the risk of serious injury whenever you

are instructed to relieve pressure, always follow the

Pressure Relief Procedure

on page 5.

NOTE:

Air V

alve Kit 237–683 is available. Parts

included in the kit are shown with a dagger (

) after the

Ref. No. A tube of general purpose grease is supplied

in the kit. Replace the air valve as follows:

Relieve the pressure.

Unscrew the six mounting screws (10), and

remove the air valve (200). See Fig. 2.

Use an o-ring pick to remove the bearing (125).

Remove the lower link bearing (24). See Fig. 3.

Remove the two screws (23) holding the valve

plate (13) to the pump. Use an o-ring pick to

remove the valve plate and seal (12). Clean and

inspect the parts. Replace any worn ones. See

Fig. 3.

If the pilot pins (26) are accessible from the inside

of the pump housing (2), pull them out. See Fig. 3.

If not accessible, disassemble the fluid section as

explained on pages 13 to 15.

NOTE:

Inspect the pilot pin o-rings (28) and bearings

(27) in place. Removal will destroy the bearings and is

not required unless they are damaged. T

o service the

bearings, first perform steps 4 and 5 on page 13.

Use a 1/8 in. EZY

-OUT to remove the bearings

(27) from the housing (2). See Fig. 10 on page 14

for an illustration of how to use an EZY

-OUT.

Remove the o-rings (28). Clean and inspect the

parts. Replace any worn parts.

7325A

Fig. 2





GREASE APPLICA

TION

201

orque oppositely and evenly to 20 to 25 in-lb (2.3 to 2.8 N.m).

Apply grease.





218

200 214

217

05524

 

Pump

Repair – Air V

alve

NOTE:

If the pilot pin o-rings (28) and bearings (27)

were not removed, go to step 8.

Grease the o-rings (28) and install them in the

bearings (27). Press the bearings and o-rings in

place so the bearings are flush with the surface of

the housing (2). See Fig. 3.

Grease the pilot pins (26), and install them from

the inside of the housing (2). See Fig. 3.

Install the seal (12) in the pump housing (2). Install

the valve plate (13), and secure it with the two

screws (23). T

orque the screws to 5 to 7 in-lb (0.6

to 0.8 N.m). See Fig. 3.

10.

Apply grease to the bearings (125 and 24). Install

the bearing (125) in the pump housing (2).

Reinstall the lower bearing (24). See Fig. 3.

11.

Make certain the o-ring (201) is in good condition

and in place on the air valve cover (206).

12.

Apply grease where shown in Fig. 2.

13.

Align the new air valve assembly so the reset

screw (214) is at the bottom. Check that the pilot

pins (26) inside the pump housing (2) give

clearance for the actuator link (217). Install the six

screws (10), and torque them oppositely and

evenly to 20 to 25 in-lb (2.3 to 2.8 N.m).

CAUTION

If you are replacing the diaphragms (60), you

must

reinstall the air valve before installing the dia

phragms, as the diaphragms will force the pilot pins

into the air valve area.

Fig. 3

orque to 5 to 7 in-lb (0.6 to 0.8 N.m).

1125

Apply grease.

04233

Press-fit flush with surface of housing (203).

27 4

9308-781

Pump

Repair – Air V

alve

Disassembly

WARNING

reduce the risk of serious injury whenever you

are instructed to relieve pressure, always follow the

Pressure Relief Procedure

on page 5.

NOTE:

Air V

alve Kit 237–683 is available. Parts

included in the kit are shown with a dagger (

) after the

Ref. No. A tube of general purpose grease is supplied

in the kit.

Relieve the pressure.

Remove the air valve (200) as explained on

page 7.

Remove the screw (221) and the reset shaft

handle (222).

Remove the screw (219) and shift saddle (218).

See Fig. 4.

Disassemble the link assembly

, consisting of the

actuator link (217), spacer (220), detent link (213),

spring (212), stop (21

1), and valve cup (210).

Remove the detent ball (207) and spring (209).

The detent collar (208) is a press-fit and should not

need removal; if it does require replacement, you

should also replace the cover (206).

Remove the reset shaft (214), o-ring (215) and

washer (216).

Clean all parts, and inspect them for wear or

damage. Replace as needed. See

Reassembly

on page 10.

Fig. 4

206

208

211

216

217

215

214

213

220

218

219

212

210

207

209

201

222

221

05525

 

Pump

Repair – Air V

alve

Reassembly

the detent collar (208) was removed,

install a

new collar in a new cover (206). Using a rubber

mallet, carefully press fit the detent collar (208)

into the cover (206). See Fig. 5.

Grease the detent spring (209) and place it in the

collar (208). Grease the ball (207) and set it on the

spring. See Fig. 5.

Apply grease to the o-ring (215), and install it in

the hole in the air valve cover (206), as shown in

Fig. 5. Slide the washer (216) onto the blunt end of

the reset shaft (214). Insert the shaft through the

air valve cover (206) until it seats.

Grease the spring (212). Place the link stop (21

inside the spring. See Fig. 6.

Grease the detent link (213) and link spacer (220).

Assemble the detent link, link spacer

, and actuator

link (217) as shown in Fig. 6. The raised bumps on

the links (213 and 217) must face up.

Squeeze the spring (212), and install it and the

stop (21

1) in the link assembly

. See Fig. 6. The

spring tension will hold all these parts together

Grease the valve cup (210) and install it in the link

assembly as shown.

05526

Fig. 5





216

206

209

207

208

214

Apply grease.

Press fit.

215







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