Graco T Series Operation manual

306–667

Rev. G

Supersedes Rev E

and PCN F

First

choice when

quality counts.



INSTRUCTIONS-PARTS

LIST

INSTRUCTIONS

This

manual contains important

warnings and information.

READ AND KEEP FOR REFERENCE.

Airless

Spray Gun

21.0 MPa, 210 bar (3000 psi) Maximum Working Pressure

Model 205–591, Series T

For

non-circulating system

* Spray tip not included. Order separately

GRACO INC. P.O. BOX 1441

MINNEAPOLIS, MN

55440–1441

http://www.graco.com

COPYRIGHT

1997, GRACO INC.

Graco

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

306–667

Table

of Contents

Installation 4.

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

Operation 6

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

Troubleshooting 8

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

Service 10

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

Parts 12

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

Technical

Data

13.

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

Graco

arranty 16.

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

Graco

Phone Number

16.

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

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

corresponding instructions.

WARNING

INJECTION HAZARD

Spray

from the gun, hose leaks, or ruptured components can inject fluid into your body and cause an

extremely serious injury

, including the need for amputation. Splashing fluid in the eyes or on the skin

can also cause a serious injury



Fluid injected into the skin might look like just a cut, but

it is a serious injury

Get immediate medi

cal attention.



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



Do not put hand or fingers over the spray tip.



Do not stop or deflect fluid leaks with your hand, body

, glove, or rag.



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



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



Be sure the gun trigger safety operates before spraying.



Lock the gun trigger safety when you stop spraying.



Check gun dif

fuser operation weekly



Follow the

Pressure Relief Procedure

on page 5 whenever you: are instructed to relieve pres

sure; stop spraying; clean, check, or service the equipment; and install or clean the spray tip.

T

ighten all the fluid connections before operating the equipment.



Check the hoses, tubes, and couplings daily

. Replace worn, damaged, or loose parts immediately

Permanently coupled hoses cannot be repaired; replace the entire hose.

TOXIC FLUID HAZARD

Hazardous

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

skin, swallowed, or inhaled.



Know the specific hazards of the fluid you are using. Read the fluid manufacturer

’

s warnings.



Store hazardous fluid in an approved container

. Dispose of the hazardous fluid according to all

local, state, and national guidelines.

W

ear appropriate protective clothing, gloves, eyewear

, and respirator

3306–667

WARNING

FIRE AND EXPLOSION HAZARD

Improper

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

result in fire or explosion and serious injury

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

sprayed.

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

Electrically disconnect all the equipment in the spray area.

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

Do not turn on or of

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

Do not smoke in the spray area.

Do not operate a gasoline engine in the spray area.

If there is any static sparking while using the equipment,

stop spraying immediately

. Identify and

correct the problem.

INSTRUCTIONS

EQUIPMENT MISUSE HAZARD

Equipment

misuse can cause the equipment to rupture, malfunction, or start unexpectedly and result

in a serious injury

This equipment is for professional use only

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

Use the equipment only for its intended purpose. If you are uncertain about usage, call your Graco

distributor.

Do not alter or modify this equipment. Use only genuine Graco parts and accessories.

Check the equipment daily

. Repair or replace worn or damaged parts immediately

Do not exceed the maximum working pressure of this equipment. This system has a

21.0 MPa,

210 bar (3000 psi) maximum working pressure.

Use fluids that are compatible with the equipment wetted parts. See the

echnical Data

section of

all the equipment manuals. Read the fluid manufacturer

’

s warnings.

Route the 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 use the hoses to pull equipment.

ear hearing protection when operating this equipment.

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

4306–667

Installation

General

WARNING

INJECTION HAZARD

o reduce the risk of serious injury whenever you

are instructed to relieve the pressure, always follow

the

Pressure Relief Procedure

on page 5.

NOTE:

Numbers and letters in parentheses in the text

refer to reference numbers in the Figures and Parts

Drawing.

WARNING

INJECTION HAZARD

e s

e y

our syste

m h

s a b

leed-typ

e m

aster air

valve

(

pneumati

c v

alve

s o

nly

) a

d a f

lui

d d

rain

alve.

These

o a

ccessorie

s h

elp reduc

e t

he ris

k o

serious

njury

, i

ncluding

lui

d i

njection

, s

plashin

g i

n t

eyes

r o

e s

kin

, o

r i

njur

y f

m m

ovin

g p

art

s i

f y

are

djustin

g o

r repairin

g t

e p

p o

r gun.



The bleed-type master air valve relieves air

trapped between this valve and the pump after

the air regulator is shut of

f. T

rapped air can

cause the pump to cycle unexpectedly



The fluid drain valve assists in relieving fluid

pressure in the displacement pump, hose, and

gun; triggering the gun to relieve pressure may

not be suf

ficient.

Connect a grounded fluid hose to the gun inlet.

With no tip installed, start the pump/sprayer

. Flush

it according to the instructions supplied with it.

Prime the system with the fluid you are using.

Relieve the pressure.

With the gun safety latch engaged, unscrew the tip

guard (25) and install the tip (B) and gasket (17) in

the nut of the tip guard. Screw the assembly firmly

onto the gun. T

ighten with a wrench. See Fig. 1.

Fig. 1

25 B17 23

NOTE:

Failure to install the tip gasket (17) will result in

leaking.

Strain the fluid you are spraying if it contains

particles which could clog the spray tip.

5306–667

Operation

Grounding

o reduce the risk of static sparking, ground the pump,

object being sprayed, and all other spray equipment

used or located in the spray area. Check your local

electrical code for detailed grounding instructions for

your area and type of equipment. Be sure to ground all

of this spray equipment.



Pump or sprayer:

as instructed in your separate

pump or sprayer manual.



Air compressor or hydraulic power supply:

accord-

ing to local code.



Fluid hoses:

use only grounded hoses with a maxi

mum of 500 feet (150 m) combined hose length to

ensure grounding continuity



Spray gun:

obtain grounding through connection to

a properly grounded fluid hose and sprayer or

pump.



Fluid supply container:

according to local code.



Object being sprayed:

according to local code.



All solvent pails

used when flushing, according to

local code. Use only metal pails, which are conduc

tive. Do not place the pail on a non-conductive

surface, such as paper or cardboard, which inter

rupts the grounding continuity



o maintain grounding continuity when flushing or

relieving pressure,

always hold a metal part of the

gun firmly to the side of a metal pail, then trigger

the gun.

Pressure Relief Procedure

WARNING

INJECTION

HAZARD

Fluid under high pressure can be in

jected through the skin and cause

serious injury

. T

o reduce the risk of an

injury from injection, splashing fluid, or moving

parts, follow the

Pressure Relief Procedure

whenever you:



are instructed to relieve the pressure,



stop spraying,



check or service any of the system equipment,



or install or clean the spray tips.

Engage the spray gun safety latch.

Shut of

f the power supply to the pump and close

any bleed-type master air valves in the air supply

Disengage the gun safety latch.

Hold a metal part of the gun firmly to the side of a

grounded metal pail, and trigger the gun into the

pail to relieve pressure.

Engage the spray gun safety latch.

Open the pump fluid drain valve (required in your

system), having a container ready to catch the

drainage.

Leave the 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, very slowly loosen the

tip guard retaining nut or hose end coupling and relieve

pressure gradually

, then loosen completely

. Now clear

the tip or hose.

6306–667

Operation

Using the Gun

WARNING

INJECTION

HAZARD

o reduce the risk of serious injury whenever you

are instructed to relieve the pressure, always follow

the

Pressure Relief Procedure

on page 5.

WARNING

INJECTION HAZARD

o avoid fluid injection from accidental spray

engage the gun safety latch. See Fig. 2.

Start the pump. Adjust the fluid pressure so the

spray is completely atomized. Always use the

lowest pressure necessary to get the desired

results. Higher pressure may not improve the

spray pattern and will cause premature tip and

pump wear

2. I

f a

djustin

g t

e p

ressur

e d

s n

t g

e a g

d s

pray

pattern

, t

y a

nother ti

p s

ize

. B

e s

e to

relieve the

pressure

ompletel

y b

efor

e c

hangin

g t

ips.

Use a full-open, full-close trigger action. Hold the

gun about 350 mm (14 in.) from, and at right

angles, to the work surface. Do not swing the gun

in an arc. Practice to find the best length and

speed of the stroke.

Fig. 2

o lock trigger safety

(on safe), pull out

latch and turn to right

angle with body

Protect openings

in tip guard from

damage.

o unlock trigger safety

(of

f safe), turn latch

parallel to body

7306–667

Operation

WARNING

INJECTION HAZARD

o reduce the risk of serious injury whenever you

are instructed to relieve the pressure, always follow

the

Pressure Relief Procedure

on page 5.

Adjust the Spray Pattern

1. To

adjust the spray pattern direction, relieve the

pressure

. Engage the safety latch and loosen the

tip guard retaining nut. T

urn the spray tip so the

groove is horizontal for a horizontal spray pattern,

and vertical for a vertical spray pattern. T

ighten the

retaining nut.

The spray tip orifice size and spray angle deter

mines the coverage and size of the pattern. When

more coverage is needed, use a larger spray tip

rather than increasing fluid pressure.

WARNING

INJECTION HAZARD

o reduce the risk of an injection injury

, never use

the gun with the tip guard or trigger guard removed.

CAUTION

Openings in the tip guard are designed to reduce

paint buildup on the guard while spraying. Any dam

age to the sharp edges of the openings causes paint

to collect at that area. T

o reduce the risk of damage,

never hang the gun by the tip guard.

Cleaning and Clearing the Spray Tip

WARNING

INJECTION

HAZARD

o reduce the risk of fluid injection or splashing in

the eyes or on the skin, do not hold your hand,

body

, or a rag in front of the spray tip when clean

ing or checking a clogged tip. Always point the gun

toward the ground or into a waste container when

checking to see if the spray tip is cleared.

Relieve

the pressure

before wiping vbuildup of

f the gun or

spray tip.

Clean of

f the front of the tip frequently during the day’

operation and at the end of the work day.

Relieve the

pressure,

then use a solvent soaked brush to clean

the spray tip and to keep fluid buildup from drying and

clogging the spray tip.

If the spray tip clogs while spraying, release the spray

gun trigger

, engage the trigger safety

, shut of

f the

pump, and

relieve the pressure.

Then remove the

spray tip and blow out the obstruction with air from the

front of the spray tip, or let the spray tip and gun

nozzle soak long enough to dissolve the obstruction. If

it won’t dissolve, jar it out by tapping the back of the

spray tip against a flat surface.

CAUTION

Never soak the entire gun in solvent. Prolonged

exposure to solvent can ruin the packings.

8306–667

Operation

WARNING

INJECTION HAZARD

o reduce the risk of serious injury whenever you

are instructed to relieve the pressure, always follow

the

Pressure Relief Procedure

on page 5.

Flushing the Gun

WARNING

FIRE

AND EXPLOSION HAZARD

Before flushing, be sure the entire system and

flushing pails are properly grounded. Refer to

Grounding,

on page 5.

Relieve the pressure

and remove the spray tip from the gun. Always use

the lowest possible fluid pressure, and maintain

firm metal-to-metal contact between the gun and

the pail during flushing to reduce the risk of a fluid

injection injury

, static sparking, and splashing.

Relieve the pressure

, remove the spray tip, and then

flush the gun and spray system with a compatible

solvent. Always flush the gun before the fluid being

sprayed can dry on it.

Fig. 3

Maintain firm

metal–to metal

contact between

gun and container

Troubleshooting

If you

r g

un leak

s a

t the ti

p w

hen yo

u r

elease the

trigger

e n

eedl

e o

r sea

t i

s w

n o

r damage

d a

mus

t b

e repaired

. S

n P

acking

n p

e 1

If the gun sprays with the trigger safety on, the

needle travel must be adjusted. See

Adjusting the

Needle

on page 1

9306–667

Notes

10 306–667

Service

WARNING

INJECTION HAZARD

o reduce the risk of serious injury whenever you

are instructed to relieve the pressure, always follow

the

Pressure Relief Procedure

on page 5.

NOTES:



A repair kit, Part No. 214–969, is available for

repairing the gun. Use all new parts in the kit for the

best results.



Parts included in the kit are shown with a dagger

for example (24†), indicate that these parts are

included in the repair kit.



Periodically disassemble the gun to clean and

inspect parts.

Needle

Relieve the pressure.

Screw out the spring retainer (19). Remove the

spring (7) and needle (24). Unscrew the seat (23).

See the Parts Drawing, page 12.

Soak parts in clean solvent. Use the brushes

supplied to clean the parts and gun body passage

ways. Replace worn or damaged parts.

If installing a new needle (24), remove the two nuts

(20, 21) from the old needle, counting the number

of turns needed to remove them. Screw the nuts

onto the new needle the same number of turns

and lock them together

. Not that the thickest nut

(21) goes on first.

Adjust the needle as instructed below before

operating the gun.

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