Graco Inc 308-548, 231-353, 390sts User Manual

INSTRUCTIONS–P

This manual contains important warnings and information. READ AND RETAIN FOR REFERENCE

ELECTRIC, 120 VAC

ARTS LIST

308–548

Rev. D

Supercedes Rev. C

390

2750

Model 231–353, Series A

Complete T

ip Guard and SwitchT

sts

psi (195 bar) Maximum Working Pressure

sprayer with hoses, gun, RAC IV DripLess

Airless

ip

Paint Sprayer



GRACO INC. P.O. BOX 1441

COPYRIGHT

MINNEAPOLIS, MN

1994, GRACO INC.



55440–1441

Table

of Contents

Warnings 4. Major Setup 6 Operation Startup Shutdown Flushing 13 Troubleshooting 14 Motor Test 18. General Motor Displacement Motor 26 Motor Power

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Components5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

and Care

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Repair Information

Brush

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

Start Board

Supply Cord

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Pump Repair

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12.

19.

20.

22.

27.

Symbols

Warning Symbol

WARNING

his

symbol alerts you to the possibility of serious

injury or death if you do not follow the instructions.

ON/OFF Drive Pressure Pressure Transducer 31. Drain Valve 32. Inlet Displacement Accessories Sprayer Sprayer Technical Dimensions 36 Graco Warranty and Disclaimers Phone

Switch

Housing, Connecting Rod, Crankshaft

Control

Strainer Installation/Removal

Parts Drawing Parts List

Data

Numbers

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Pump Parts Drawing and List

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TAG

27.

28.

30.

32.

33.

34.

35.

36.

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

FIRE AND EXPLOSION HAZARD

Improper result in a fire or explosion and serious injury



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

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

spraying 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 sprayed.

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

Electrically disconnect all equipment in the spray area.

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

Do not smoke in the spray area.

Do not turn on or of

Do not operate a gasoline engine in the spray area.

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

stop

 

WARNING

INJECTION HAZARD

Spray

from the gun, leaks or ruptured components can inject fluid into your body and cause ex tremely serious injury can also cause serious injury



Fluid injected into the skin is a serious injury injury

. Get immediate medical attention.



Do not point the gun at anyone or at any part of the body



Do not put your hand or fingers over the spray tip.



Do not stop or deflect leaks with your hand, body



Do not “blow back” fluid; this is not an air spray system.



Always have the tip guard and the trigger guard on the gun when spraying.



Check the gun dif



Be sure the gun trigger safety operates before spraying.



Lock the gun trigger safety when you stop spraying.

, including the need for amputation. Fluid splashed in the eyes or on the skin

. The injury may look like just a cut, but it is a serious

, glove or rag.

fuser operation weekly

. Refer to the gun manual.



Follow the checking or servicing the equipment.

 T

ighten all fluid connections before operating the equipment.



Check the hoses, tubes, and couplings daily not repair high pressure couplings; you must replace the entire hose.



Fluid hoses must have spring guards on both ends, to help protect them from rupture caused by kinks or bends near the couplings.

Pressure Relief Procedure

on page 9 if the spray tip clogs and before cleaning,

. Replace worn or damaged parts immediately

TOXIC FLUID HAZARD

Hazardous skin, inhaled, or swallowed.



Know the specific hazards of the fluid you are using.



Store hazardous fluid in an approved container state and national guidelines.



Always wear protective eyewear and solvent manufacturer

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

. Dispose of hazardous fluid according to all local,

, gloves, clothing and respirator as recommended by the fluid

. Do

MOVING PARTS HAZARD

Moving



parts can pinch or amputate your fingers.

Keep clear of all moving parts when starting or operating the pump.

Before servicing the equipment, follow the equipment from starting unexpectedly

Pressure Relief Procedure

on page 9 to prevent the

 

WARNING

EQUIPMENT MISUSE HAZARD

INSTRUCTIONS

Equipment



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 Graco T

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

echnical Assis

tance at 1–800–543–0339.



Do not alter or modify this equipment.



Check equipment daily



Do not exceed the maximum working pressure of the lowest rated system component. Refer to the Technical Data



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

nical Data

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

. Repair or replace worn or damaged parts immediately

on page 36 for the maximum working pressure of this equipment.

ings.



Do 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.



Do not use hoses to pull equipment.

Tech-



Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not ex pose Graco hoses to temperatures above 66C (150F) or below –40C (–40



Do not lift pressurized equipment.



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

NOTE: This

is an example of the DANGER label on

your sprayer

. This label is available in other

languages, free of charge. See page 36 to order

FIRE

AND

EXPLOSION HAZARD

Spray

painting,

in confined areas can result in fire or explosion.

uids Use outdoors or in extremely well ventilated areas. Ground equip

hoses, containers and objects being sprayed.

ment, Avoid

all ignition sources such as

cloths,

open flames

arcs from

rettes,

light switches on and off.

ing Failure

to follow this warning can result in death or serious injury

flushing or cleaning equipment with flammable liq

static electricity from plastic drop

such as pilot lights, hot objects such as ciga

connecting or disconnecting power cords or turn

F).

SKIN INJECTION

HAZARD

Liquids

can be injected into the body by high

leaks – especially hose leaks.

Keep

body clear of the nozzle. Never stop leaks with any part of the

body.

Drain all pressure before removing parts.A

of gun by always setting safety latch when not spraying.

gering Never spray without a tip guard. In case of accidental skin injection, seek immediate

“Surgical Failure to follow this warning can result in amputation or serious

injury.

reatment”.

pressure airless spray

void accidental trig

 

READ AND UNDERSTAND ALL LABELS AND INSTRUCTION MANUALS BEFORE USE

Major Components

05963

Fig.

06197

A Motor

Drive Assembly

Pressure Adjusting Knob

ON/OFF Switch

Fluid Outlet

Displacement Pump

50 ft (15 m) Main Hose

RAC IV T

FTx Gun

RAC IV Switch T

Pressure Drain V

Pressure Control

Spray Gun Safety Latch

ip Guard

alve

DC motor

ransfers power from DC motor to the displacement pump

, 120 V

ac, 15A, 1 phase

Controls fluid outlet pressure

Power switch that controls 120 V

ac power to sprayer

Hose and spray gun is connected here

Pressurizes fluid to be sprayed through spray gun

1/4 in. ID, grounded, nylon hose with spring guards on both ends

Reverse-A-Clean (RAC) tip guard reduces the risk of fluid injection inju ry

High pressure spray gun with gun safety latch

RAC switch tip atomizes fluid and removes clogs from spray tip without removing tip from spray gun

Relieves fluid pressure when open

Controls motor to maintain fluid pressure. W

orks with pressure

adjusting knob.

Inhibits accidental triggering of spray gun

 

Setup

WARNING

If you supply your own hoses and spray gun, be sure the hoses are electrically conductive, that the gun has a tip guard, and that each part is rated for at least is to reduce the risk of serious injury caused by static sparking, fluid injection or over-pressurization and rupture of the hose or gun.

2750 psi (195 bar) Working Pressure

. This

CAUTION

o avoid damaging the pressure control, which may result in poor equipment performance and component damage, follow these precautions:

Always use a nylon spray hose at least 50 ft. (15 m) long.

Never use a wire braid hose as it is too rigid to act as a pulsation dampener

Never install any shutof filter and the hose. See Fig. 2.

1. Connect the hose (74) and gun (67) onto the outlet nipple (28). Don’t use thread sealant, and don’t install the spray tip yet!

f device between the

and screw it

2. Fill the wet–cup (102). Fill the cup 1/3 full with Graco Throat Seal Liquid (TSL), supplied. Install the wet-cup seal.

Plug in the sprayer. Be sure the ON/OFF switch

(52) is OFF least 20 feet away from the spray area.

. Plug the cord into a grounded outlet at

Pry of

f the wet-cup seal.

WARNING

FIRE AND EXPLOSION HAZARD

Proper electrical grounding is essential to reduce the risk of fire or explosion which can result in serious injury and property damage. Also read

EXPLOSION HAZARD

4. Flush the pump which was left in to protect pump parts after fac tory testing. See page 13.

Prepare the paint

ers’

s recommendations. Remove any paint skin. Strain the paint through a fine nylon mesh bag (available at most paint dealers) to remove par ticles that could clog the spray tip. This is an im portant step toward trouble-free paint spraying.

to remove the lightweight oil

according

to the manufactu

FIRE OR

on page 2.

1/4

npsm(m) fluid outlet

Do not install any shutof

Rotate clockwise to increase pressure

Shown in closed or spray position

Fill 1/3 full with TSL

f device here

102

Fig. 2

6 308-548

06197

Operation

How to Use the Gun Trigger Safety

WARNING

INJECTION

If the gun still sprays when the gun trig ger safety is locked, repair the gun. See manual 308–645, supplied.

1. T

o engage the gun trigger safety counterclockwise toward the handle until the detent of the latch locks on and the pin is at a right angle with the gun body. See Fig. 3.

2. T

o disengage the gun trigger safety, turn the latch clockwise away from the handle to unlock the detent of the latch and turn the pin 180 gun body

HAZARD

, turn the latch

 from the

LATCH

Open or drain, position

Closed,

or spray position

Fig.

04646

How to use the pressure control.

ENGAGED DISENGAGED

Fig. 3

05964

How to use the pressure drain valve.

Use

the pressure drain valve to relieve fluid pressure

from the pump and to help prime the pump. If the valve senses an over pressure condition, it opens automati cally to relieve fluid pressure. If this happens, stop spraying immediately, shut of

f and unplug the sprayer Determine the cause of the problem and correct it be fore operating the sprayer again. Refer also to the

Troubleshooting

, page 14. See Fig. 4.

The

pressure control controls the motor operation so the sprayer maintains constant fluid pressure at the pump outlet. T terclockwise to obtain the minimum setting. T

urn the pressure control knob fully coun

urn the

knob clockwise to increase pressure. See Fig. 5.

Fig. 5

01022A

308-548 7

How to use the RAC IV tip guard.

WARNING

Operation

INJECTION

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

Procedure

The tip guard alerts you to the risk and helps prevent placing any part of the body close to the spray tip. The tip guard also adjusts the vertical or horizontal spray pattern. See Fig. 8. The tip guard holds a reversing spray tip. The tip is in the spraying position when the tip handle points forward. See Fig. 6.

Clean the front of the tip frequently during the day’ operation. First, follow the on page 9.

on page 9.

HAZARD

Pressure Relief

Pressure Relief Procedure

How to remove a tip clog.

1. Release tate the RAC IV tip handle 180. See Fig. 6.

Unlock the safety latch. T or onto the ground to remove the clog.

the gun trigger

. Lock the safety latch. Ro

rigger the gun into a pail

Tip

handle shown in

spraying position.

urn handle 180

trigger gun to clear clog

Fig. 6

3. Lock

the safety latch. Rotate the tip handle to the

spraying position.

If the tip is still clogged, lock the safety latch, shut of

f and unplug the sprayer drain valve to relieve pressure. Clean the spray tip as shown in manual 307–848, supplied.

,

05966

, and open the pressure

 

Startup

WARNING

INJECTION HAZARD

The system pressure must be manually relieved to prevent the system from

starting or spraying accidentally under high pressure can be injected through the skin and cause serious injury an injury from injection, splashing fluid, or moving parts, follow the whenever you:



are instructed to relieve the pressure,



stop spraying,



check or service any of the system equipment,



or install or clean the spray tip.

Pressure Relief Procedure

. T

o reduce the risk of

Pressure Relief Procedure

1. Engage the gun safety latch.

2. Turn the ON/OFF switch to OFF

Unplug the power supply cord.

Disengage the gun safety latch. Hold a metal part of the gun firmly to a grounded metal pail. T the gun to relieve pressure.

Engage the gun safety latch.

6. Open the pressure drain valve. Leave the pressure drain valve open until you are 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

en the tip guard retaining nut or hose end coupling to relieve pressure gradually Now clear the tip or hose obstruction.

, then loosen completely

, VER

Y SLOWL

. Fluid

rigger

Y loos

NOTE:

See page 13.

NOTE:

in the text as you start the sprayer

2. Don’t install the spray tip until the pump is

Fig.

3. T

4. Disengage the gun trigger safety

If this is a first-time startup, flush the sprayer

Refer to Fig. 9 and the other figures referenced

Open the pressure drain valve (42).

primed!

Open

or drain, position

urn the pressure knob (64) to the minimum

setting.

page 7.

See Fig. 7.

See Fig. 3,

CAUTION

Do not run the sprayer dry for more than 30 sec onds to avoid damaging the pump packings.

04648

Startup Procedure

Use

this procedure each time you start the sprayer to

help ensure the sprayer is ready to operate and that you start it safely

5. T

o prime the pump,

on. Slowly increase the pressure until the sprayer starts. When fluid comes from the pressure drain valve, close the valve.

turn the sprayer switch (52)

308-548 9

WARNING

FIRE AND EXPLOSION HAZARD

o reduce the risk of static sparking and splashing when priming or flushing the system, hold a metal part of the gun

firmly to the side of a grounded metal pail before triggering the gun.

Startup

If more coverage is needed, use a larger tip rather than increasing the pressure.

Adjust the direction of the spray pattern. See Fig. 8. Engage the gun safety latch. Loosen the retaining nut (A). Position the tip guard for a horizontal or vertical pattern. Hold the tip guard in place and tighten the retaining nut.

6. T

o prime the hose

splashing. Hold a metal part of the gun firmly against and aimed into a grounded metal pail. See the preceding W open and slowly increase the pressure until the pump starts. Keep the gun triggered until all air is forced out of the system and the fluid flows freely from the gun. Release the trigger and engage the gun safety latch.

7. Check all fluid connections for leaks pressure before tightening the connections.

Engage the gun safety latch.

9. Install the spray tip and tip guard. spray tip. If you are using the RAC IV tip guard, refer to manual 307–848 for installation instruc tions.

10. Adjust the spray pattern

Increase the pressure until spray from the gun is completely atomized. T overspray and fogging, and to extend tip and sprayer life, always use the lowest pressure needed to get the desired results.

, lower the pressure to reduce

ARNING. Hold the gun trigger

. Relieve

Install the

o avoid excessive

NOTE:

Change the spray tip if adjusting the pressure will not improve the spray pattern.

Spray patterns will change as tips wear

For a vertical

spray pattern

For

Fig. 8

a horizontal

spray pattern

05971

10 308-548

1/4

npsm(m) fluid outlet

Do not install any shutof

Rotate clockwise to increase pressure

Shown in closed or spray position

Fill 1/3 full with TSL

f device here

Startup

Fig.

102

06197

308-548 11

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