INSTRUCTIONS-PARTS

LIST

This manual mntainr IMPORTANT

WARNINGS a d INSTRUCTIONS

READ AND RETAIN FOR REFERENCE

For 2 1 Ratio Standard Pumps

1 8 ~ 112

t x r )

MAXIMUM AIR WORKING PRESSURE

Model 2 4 4 Series A

For Pump Model

204-456

Model

aWm,

Series C

For Pump Models 218555,218-556,2%'&l,

226440.

and 208177

307-851

R e v B

SUPERSEDES A

MODEL aDQow

M O D E L ~ D C ~

GRACO INC P.O. Box

1441

MINNEAPOLIS. MN 5-1444

@COPYRIGHT

1987

GRACO INC.

,

FIRE OR EXPLOSION HAZARD

Static electricity is created by the flow of fluid through the pump and hose. If not properly grounded, spark- ing from solvents, the fluid being sprayed. dust particles and other flammable substances, whether spraying indoors or outdoors, resulting in fire or ex- plosion and serious bodily injury.

G r o u n d i n g is generally not a problem. However, some simple precautions should be taken to reduce the risk. Check your local code for detailed grounding instructions for your area and type of equipment, and ground all of this equipment:

1. Pump: Air Motor Model .?OW#

- use ground wire and clamp as instructed to the right.

204-722

- use ground wire and clamp as instructed in your pump manual.

2.

Air Compressor: according to manufacturer's recommen- dations.

3. Fluid hoses: use only grounded hoses with a maximum of

500 feet (1% m) combined hose to ing continuity. Refer to HOSE SAFETY. ensure ground-

4. Spray gun/dispensing valve: obtain grounding through

5. Object being sprayed: according to local code.

6. Fluid supply containers: according to local code.

7. AI1 solvent pails used when flushing: according to local code. Use only metalpails, which are conductive. not as paper or cardboard, which interrupts the grounding continuity.

8. To maintain grounding continuity when flushing or reliev- the gun firmly to the side of a grounded metal pail, then trigger the gun.

Model

204-464

To grounding lug locknut IW) and washer

12 ground pump with Air Motor Model ga (1.5

1x1.

IYI

Insert one end of a into the slot in lug

IZI and tighten the locknut securely. See above. Connect the other end of the wire to a true earth ground. Refer to the cover to order a ground wire and clamp.

Flushing Safety

To reduce the risk of static sparking

Pressure Relief Procedure, on page or splashing, follow the

2

and remove the spray tip (spray guns or spray valves only1 before flushing. Hold a metal part of the gunlvalve firmly to the side of a grounded metal pail and use the lowest possible fluid pressure during flushing.

MOVING PARTS HAZARD

The piston in the air motor, located behind the air motor plates, moves when air is supplied to the motor. Moving parts can pinch or amputate your fingers or other body parts.

Therefore, NEVER operate the pump with the air motor plates removed. KEEP CLEAR of moving parts when starting or operating the pump. Before checking or servicing the pump, follow the Pressure Relief Procedure on page the pump from starting accidentally.

2

to prevent

.

IMPORTANT

~

United States Government safety standards have been adopted under Health Act. These standards-par- ticularly the General Standards, Part 1910, and the Construction Standards, Part 1926-should be consulted.

Air Motor Model

204-722

4

-...

. .

Fig 2

APPLY SEALANT.

TORQUE TO

1014 In-lb

(1.3-1.6 N.ml lk

14

5'

'* 3:

Fluid

Pressure Gauge

1. To recalibrate the gauge (Zc), adjust the valve

(6)

so the gauge needle points t o the first

dial

graduation mark above the zero stop. Refer t o Fig

6.

Turn the calibration screw (2f) clockwise t o increase counterclockwise to decrease the setting.

and

Do

n o t remove the calibration screw from the housing. Any loss of oil results in lower sensitivity.

2.

If the gauge needs frequent calibration or sen-

(2a) for oil leaks. Connec- tions between the gauge and housing must be tight.

If

oil leaks around the calibration screw

(21.

screw cannot be turned inward, disassemble and recharge.

3.

To

recharge the gauge, remove the six screws ( 8 ) from the housing (2al. Clean and inspect the diaphragm inside the housing Ea).

If

the housing diaphragm has cracks or leaks, replace the housing

(2a).

4.

'

Remove the calibration screw

(21

O-ring (2d') for damage. Replace if necessary.

5. Remove the gauge (2cl from the pulsation dampener

(2b) carefully, to avoid oil

loss.

Check the gauge with air pressure, and replace if it is damaged.

6. Place the housing (2a). with its base face down, on a flat surface. Fill the housing with

light

machine oil, such as S A € 5W. through the calibration screw (2) opening. When nearly full, place a finger over the gauge opening and fill the screw opening to overflowing. Install the screw until flush, then turn in two full turns.

ng 6

7. Place the housing in a vise with the gauge opening up and fill with oil to overflowing. Using thread the gauge is fully it should read

20

or

361b.

Calibrate as explained

in

Step

1.

20

PARTS DRAWING AND LIST

Model

204-464.

Series

A

Air

Motor

REF PART

NO. NO.

DESCRIPTION

1 *m05-101 la

AIR VALVE b PISTON ASSY

Includes items la-le

'ZQ-884

SCREW, socket hd caD: No. long; with copper gasket l b *157-634

V74-096

Id 162-728 le *162-729

2 203-093

~

.SPACER, valve plate

.PISTON, air

.PLATE.

~

~ ~ _ .

.PLATE, exhaust valve

FLUID REGULATOR b GAUGE

Includes items 2a-2f

2a 202-789 zb

2c 101-180

203-228

2d *154-594

20

*157-127

.HOUSING, fluid gauge

.DAMPENER. Dulsation

.GAUGE, fluid'pressure

.O-RING: nitrile rubber

~ ~~~

.GASKk. diaphragm; vellumoid

'

6-32: 1"

2f 158-293

3 219091

5 2 0 4 - 4 6 5

6 *204-496

SCREW, calibration

TUBE. displacement

CAP, air motor

VALVE, restrictor a n

1

3

3

1

1

1

1

1

1

1

1

1

1

1

1

1

7

8

*101-389

101-174

11

12

14

15

16

17

18

20

21

22

23

25

26

"162-989

*158-698

*157-250

157-630

157-613

157-872

*158109

158879

1-

-253

161-306

104M9

104-582

SEAL; leather

SCREW, fill head mach;

NO. ax

X I"

GASKET; rubber

O-RING, nitrile rubber

O-RING; nitrile rubber

SPRING, tapered compression

SPRING, compression

WASHER, valve

GASKET: rubber

BASE, air motor

CYLINDER, air

BEZEL, hood

SEAT, restrictor valve

CLAMP, electric grounding

WASHER, tab

*Recommended "tool box" spare parts. Keep reduce down time.

1 on hand to

6

1

1

1

1

1

1

1

1

1

1

1

1

1