INSTRUCTIONS-PARTS LIST

This manual contains important warnings and information.

READ AND KEEP FOR REFERENCE.

INSTRUCTIONS

308–472

Rev. B

Supersedes A

17: 1 RATIO SENATOR , 33:1 AND 41:1 RATIO BULLDOG CARBON STEEL

Cart-Mounted Air-Assisted

Airless Package

Refer to page 2 for a List of Models.

Table of Contents

Symbols

Warnings

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

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

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical Data

Dimensions

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

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

Graco Warranty and Disclaimers

Toll-Free Graco Phone Numbers

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

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

12

18

19

20

20

5

8

2

2

Model 237–294 Shown

04936A

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

COPYRIGHT 1995, GRACO INC.

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

Part No.

Series Pump Model

237–289 B

237–294 B

Senator r

Senator r , with hose and gun

237–405 B

238–140 B

Bulldog r , with hose and gun

Bulldog r , with hose and gun

List of Models

Ratio

Maximum Fluid

Working Pressure

17:1 1700 psi (117 bar, 11.7 MPa)

17:1 1700 psi (117 bar, 11.7 MPa)

33:1 3300 psi (228 bar, 22.8 MPa)

41:1 4100 psi (283 bar, 28.3 MPa)

Maximum Air

Input Pressure

100 psi (7 bar, 0.7 MPa)

100 psi (7 bar, 0.7 MPa)

100 psi (7 bar, 0.7 MPa)

100 psi (7 bar, 0.7 MPa)

Warning Symbol

WARNING

This symbol alerts you to the possibility of serious injury or death if you do not follow the instructions.

Symbols

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

EQUIPMENT MISUSE HAZARD

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

INSTRUCTIONS

D This equipment is for professional use only.

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

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

D Do not alter or modify this equipment.

D Check equipment daily. Repair or replace worn or damaged parts immediately.

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

Technical Data on page 18 for the maximum working pressure of this equipment.

D 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.

D Do not use hoses to pull equipment.

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

Graco hoses to temperatures above 180 _ F (82 _ C) or below –40 _ F (–40 _ C).

D Wear hearing protection when operating this equipment.

D Do not lift pressurized equipment.

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

WARNING

INJECTION HAZARD

Spray from the gun, leaks or ruptured components can inject fluid into your body and cause extremely serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin can also cause serious injury.

Fluid injected into the skin might look like just a cut, but it is a serious 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, 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 gun when spraying.

Check the gun diffuser operation weekly. Refer to the gun manual.

Be sure the gun trigger safety operates before spraying.

Lock the gun trigger safety when you stop spraying.

Follow the Pressure Relief Procedure on page 8 if the spray tip clogs and before cleaning, checking or servicing the equipment.

Tighten all fluid connections before operating the equipment.

Check the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.

Do not repair high pressure couplings; you must replace the entire hose.

Use only Graco approved hoses. Do not remove the spring guard that is used to help protect the hose from rupture caused by kinks or bends near the couplings.

MOVING PARTS HAZARD

Moving parts, such as the air motor piston, can pinch or amputate your fingers.

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

Before servicing the equipment, follow the Pressure Relief Procedure on page 8 to prevent the equipment from starting unexpectedly.

WARNING

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 and the object being sprayed. Refer to Grounding on page 5.

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

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

Do not operate a gasoline engine in the spray area.

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.

Setup

General Information

NOTE: Reference numbers and letters in parentheses in the text refer to the callouts in the figures and the parts drawing.

Grounding

NOTE: Always use Genuine Graco Parts and Accessories, available from your Graco distributor. Refer to the Product Data Sheet for the pump, Form No.

305–788 for Bulldog Pumps and Form No. 305–790 for

Senator Pumps. If you supply your own accessories, be sure they are adequately sized and pressure rated for your system.

WARNING

FIRE AND EXPLOSION HAZARD

Before operating the pump, ground the system as explained below. Also read the section FIRE OR EXPLOSION HAZ-

ARD on page 4.

Fig. 2 is only a guide for selecting and installing system components and accessories. Contact your Graco distributor for assistance in designing a system to suit your particular needs.

1.

Pump: use the ground wire and clamp (supplied).

See Fig. 1. Loosen the grounding lug locknut (W) and washer (X). Insert one end of the ground wire

(26) into the slot in lug (Z) and tighten the locknut securely. Connect the other end of the wire to a true earth ground.

Prepare the Operator

W

All persons who operate the equipment must be trained in the safe, efficient operation of all system components as well as the proper handling of all fluids.

All operators must thoroughly read all instruction manuals, tags, and labels before operating the equipment.

26

X

Z

Prepare the Site

NOTE: The compressed air supply to the gun must be clean and dry, to prevent damage to the finish. Use a coalescing air filter in the main air supply line.

Fig. 1

The Bulldog pumps require 65 scfm (1.82 m /min) of compressed air while operating at 100 psi (7 bar, 0.7

MPa) air pressure and 60 cycles per minute. Ensure that you have an adequate compressed air supply.

The Senator pumps require 100 scfm (2.8 m /min) of compressed air while operating at 100 psi (7 bar, 0.7

MPa) air pressure and 60 cycles per minute. Ensure that you have an adequate compressed air supply.

2.

Air and fluid hoses: use only electrically conductive hoses.

3.

Air compressor: follow manufacturer’s recommendations.

4.

Spray gun: ground through connection to a properly grounded fluid hose and pump.

Refer to Fig. 2. Bring a compressed air supply line (A) from the air compressor to the pump location. Be sure all air hoses (A) are properly sized and pressure-rated for your system. Use only electrically conductive hoses. The air hose should have a 3/4 npsm(m) thread.

Install a bleed-type shutoff valve (B) in the air line to isolate the air line components for servicing. Install an air line moisture trap and drain valve (C) to help remove moisture from the compressed air supply.

5.

Fluid supply container: follow your local code.

6.

Object being sprayed: follow your local code.

7.

Solvent pails used when flushing: follow your local code. Use only metal pails, which are conductive, placed on a grounded surface. Do not place the pail on a nonconductive surface, such as paper or cardboard, which interrupts the grounding continuity.

Keep the site clear of any obstacles or debris that could interfere with the operator’s movement.

Have a grounded, metal pail available for use when flushing the system or draining the fluid filter.

8.

To maintain grounding continuity when flushing or relieving pressure, hold a metal part of the spray gun firmly to the side of a grounded metal pail, then trigger the gun.

Supplied Components

Refer to Fig. 2.

WARNING

A red-handled bleed-type master air valve (F) and a fluid drain valve (D) are supplied. These accessories help reduce the risk of serious injury, including fluid injection and splashing of fluid in the eyes or on the skin, and injury from moving parts if you are adjusting or repairing the pump.

Setup

The gun air regulator (62) adjusts the air pressure to the air-assisted airless spray gun (102).

The air manifold (J) provides ports for connecting lines to air-powered accessories.

The air relief valve (48) opens automatically to prevent overpressurization of the pump and gun.

The bleed-type master air valve relieves air trapped between this valve and the pump after the air is shut off. Trapped air can cause the pump to cycle unexpectedly. Locate the valve close to the pump.

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 sufficient.

The fluid filter (4) includes a 60 mesh (250 micron) stainless steel element to filter particles from the fluid as it leaves the pump. It includes the fluid

drain valve (D), which is required in your system to relieve fluid pressure in the hose and gun (see the

WARNING at left).

The suction hose (8) and tube (7) allow the pump to draw fluid from a 5 gallon (19 liter) pail (E).

Connect the Hoses and Gun

NOTE: Models 237–294, 237–405, and 238–140 include air and fluid hoses, a spray gun, and connecting parts (ref. nos. 101–108). If you supply your own hoses and gun, be sure they are properly sized and pressure-rated for your system. Use only electrically conductive hoses.

The red-handled bleed-type master air valve (F) is required in your system to relieve air trapped between it and the air motor when the valve is closed (see the WARNING above). Be sure the bleed valve is easily accessible from the pump, and is located downstream from the air filter/regulator

(H).

1. Connect the fluid hose (103) to the coupling (107) at the fluid filter (4) outlet.

2. Connect the air hose (101) to the union (66) at the gun air regulator (62) outlet. Screw the other end onto the air inlet of the spray gun (102).

The air filter/regulator (H) controls pump speed and outlet pressure by adjusting the air pressure to the pump. It also removes harmful dirt and moisture from the compressed air supply. Locate close to the pump, but upstream from the bleed-type master air valve (F).

3. Screw the fluid hose (103) onto the gun swivel

(106).

4. Screw the gun swivel (106) onto the fluid inlet of the spray gun (102).

KEY

SUPPLIED WITH ALL MODELS

1 Pump

2 Cart

4 Fluid Filter (includes drain valve)

D Fluid Drain Valve (required)

7 Suction Tube

8 Suction Hose

19 Air Regulation Kit (includes items

F, G, H, and J)

F Red-Handled Bleed-Type Master

Air Valve (required, for pump)

G Air Line Inlet Swivel

H Pump Air Filter/Regulator

J Air Manifold

25 Pump Air Hose

26 Ground Wire (required; see page 5 for installation instructions)

31 Fluid Shutoff Valve

48 Air Relief Valve (partially hidden)

62 Gun Air Regulator

66 Union

Setup

SUPPLIED WITH MODELS 237–294,

237–405, AND 238–140 ONLY

101 Electrically Conductive Air Hose

102 Air-Assisted Airless Spray Gun

103 Electrically Conductive Fluid Hose

106 Gun Swivel

107 Coupling

26

C

Detail of Air Line Connection and Air Regulation Kit (19)

25

A

F

2

66

101

COMPONENTS YOU MUST SUPPLY

A Electrically Conductive Air Supply Hose

B Bleed-Type Master Air Valve

(for accessories)

C Air Line Moisture Trap and Drain Valve

E Grounded 5 Gallon (19 Liter) Pail

B

G

H

62

F

25

J

48

1

4

31

D

102

Fig. 2

103

107

106

103

101

8

Model 237–294 Shown

7

E

06274

Operation

Packing Nut/Wet-Cup Pressure Relief Procedure

WARNING

INJECTION HAZARD

The system pressure must be manually relieved to prevent the system from starting or spraying accidentally. Fluid under high pressure can be injected through the skin and cause serious injury. To 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.

Before starting, fill the packing nut (K) 1/3 full with

Graco Throat Seal Liquid (TSL) or compatible solvent.

See Fig. 3.

WARNING

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

Pressure Relief Procedure at left.

The packing nut is torqued at the factory and is ready for operation. If it becomes loose and there is leaking from the throat packings, relieve pressure, then torque the nut as specified in Fig. 3, using the supplied wrench. Do this whenever necessary. Do not overtighten the packing nut.

1. Lock the gun trigger safety.

2. Close the red-handled bleed-type master air valve

(F, required in your system).

3. Open the fluid shutoff valve (31).

4. Unlock the gun trigger safety.

5. Hold a metal part of the gun firmly to the side of a grounded metal pail, and trigger the gun to relieve pressure.

6. Lock the gun trigger safety.

7. Open the drain valve (D, required in your system), having a container ready to catch the drainage.

8. 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.

Flush the Pump Before First Use

The pump is tested with lightweight oil, which is left in to protect the pump parts. If the fluid you are using may be contaminated by the oil, flush it out with a compatible solvent. See Flushing on page 10.

Using the Air-Assisted Airless Spray Gun

Before operating the equipment, read the instruction manual supplied with the gun.

Use the gun air regulator (62) to control the air pressure to the gun.

Adjust the air pressure to the pump to control the fluid pressure at the gun. For more precise fluid pressure control, install a fluid regulator.

Spray some test patterns before doing any finished work. Refer to the gun manual for detailed information on correct spraying technique.

Operation

Set the Air and Fluid Pressure

CAUTION

To avoid tip-over, the cart must be on a flat and level surface. Failure to follow this caution could result in injury or equipment damage.

WARNING

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

Pressure Relief Procedure on page 8.

Prime the Pump

1. See Fig. 3. Remove the tip guard and spray tip from the gun (102). See the gun instruction manual.

1.

Relieve the pressure. Install the tip guard and spray tip in the gun, as explained in the gun manual.

2. Close the air filter/regulator (H), gun air regulator

(62), and bleed-type air valves (B, F).

3. Close the fluid drain valve (D).

2. Open the air filter/regulator (H) slowly. Use the regulator to control pump speed and fluid pressure. Always use the lowest air pressure necessary to get the desired results. Higher pressures cause premature tip and pump wear.

4. Connect the air line (A) to the air inlet swivel (G).

5. Check that all fittings throughout the system are tightened securely.

NOTE: To open the air filter/regulator, turn the

T-handle in (clockwise). To close the regulator, turn the handle counterclockwise. To lock the regulator setting, tighten the jam nut.

6. Place the suction tube (7) into the fluid supply container.

7. Open the fluid shutoff valve (31).

8. Open the bleed-type air valves (B, F) and the gun air regulator (62).

9. Hold a metal part of the gun (102) firmly to the side of a grounded metal pail and hold the trigger open.

WARNING

COMPONENT RUPTURE HAZARD

To reduce the risk of overpressurizing your system, which could cause component rupture and serious injury, never exceed the specified Maximum Incoming Air Pres sure to the pump (see the Technical Data, on page 18).

10. Slowly open the air filter/regulator (H) until the pump starts.

11. Cycle the pump slowly until all air is pushed out and the pump and hoses are fully primed.

3. With the pump and lines primed, and with adequate air pressure and volume supplied, the pump will start and stop as you open and close the gun.

12. Release the gun trigger and lock the trigger safety.

The pump should stall against pressure.

13. If the pump fails to prime properly, open the drain valve (D). Use the drain valve as a priming valve until the fluid flows from the valve. Close the valve.

NOTE: When changing fluid containers with the hose and gun already primed, open the drain valve (D) to help prime the pump and vent air before it enters the hose. Close the drain valve when all air is eliminated.

CAUTION

Do not allow the pump to run dry. It will quickly accelerate to a high speed, causing damage. If your pump is running too fast, stop it immediately and check the fluid supply. If the container is empty and air has been pumped into the lines, refill the container and prime the pump and the lines, or flush and leave it filled with a compatible solvent. Eliminate all air from the fluid system.

Operation

Shutdown and Care of the Pump

WARNING

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

Pressure Relief Procedure on page 8.

CAUTION

Never leave water or water-base fluid in the pump overnight. If you are pumping water-base fluid, flush with water first, then with a rust inhibitor such as mineral spirits. Relieve the pressure, but leave the rust inhibitor in the pump to protect the parts from corrosion.

For overnight shutdown, stop the pump at the bottom of its stroke to prevent fluid from drying on the exposed displacement rod and damaging the throat packings. Relieve the pressure.

Always flush the pump before the fluid dries on the displacement rod. See Flushing below.

Flushing

WARNING

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

Pressure Relief Procedure on page 8.

WARNING

FIRE AND EXPLOSION HAZARD

Before flushing, read the section FIRE

OR EXPLOSION HAZARD on page 4.

Be sure the entire system and flushing pails are properly grounded. Refer to

Grounding on page 5.

Flush the pump:

Before the first use

When changing colors or fluids

Before fluid can dry or settle out in a dormant pump

(check the pot life of catalyzed fluids)

Before storing the pump.

Flush with a fluid that is compatible with the fluid you are pumping and with the wetted parts in your system.

Check with your fluid manufacturer or supplier for recommended flushing fluids and flushing frequency.

1.

Relieve the pressure.

2. Remove the tip guard and spray tip from the gun.

See the gun instruction manual.

3. Remove the filter element from the fluid filter (4).

Reinstall the filter bowl.

4. Place the suction tube (7) in a container of solvent.

5. Hold a metal part of the gun firmly to the side of a grounded metal pail.

6. Start the pump. Always use the lowest possible fluid pressure when flushing.

7. Trigger the gun.

8. Flush the system until clear solvent flows from the gun.

9.

Relieve the pressure.

10. Clean the tip guard, spray tip, and fluid filter element separately, then reinstall them.

11. Clean the inside and outside of the suction tube

(7).

10 308-472

102

1

K

4

31

D

Operation

KEY

4 Fluid Filter (includes drain valve D)

D Fluid Drain Valve (required)

7 Suction Tube

8 Suction Hose

31 Fluid Shutoff Valve

62 Gun Air Regulator

101 Electrically Conductive Air Hose

102 Air-Assisted Airless Spray Gun

103 Electrically Conductive Fluid Hose

A Main Air Line

B Bleed-Type Master Air Valve

(for accessories)

F Red-Handled Bleed-Type Master

Air Valve (required, for pump)

G Air Line Inlet Swivel

H Pump Air Filter/Regulator

K Packing Nut/Wet-Cup

1

Models 237–289 and 237–294 Senators: torque to 136–149 N.m (100–110 ft-lb).

Models 237–405 and 238–140 Bulldogs: torque to 61–75 N.m (45–55 ft-lb).

Detail of Air Line Connection and Air Regulation Kit (19)

A

F

101

G

H

62

B

F

7

Fig. 3

103

103

101

8

Model 237–294 Shown

06274

308-472 11

Parts

Part No. 237–289, Series B (includes items 1–67)

Part No. 237–294, Series B (includes items 1–48, 56–108); shown

1

On Model 237–289, a nipple (54) is used here and the ball valve (31) is on the opposite side of the fluid filter (4).

26

101

1

31

1

107

56

4

16

17

11

1

15

2d

102

106

101 (Ref)

103

103 (Ref)

8

104

6

5

7

25

25 (Ref)

36

61

66

62

34

37

35

2c

19

48

67

2

33

2a

2b

65

64

63

60

66

04933A

12 308-472

Parts

Part No. 237–289, Series B (includes items 1–67)

Part No. 237–294, Series B (includes items 1–48, 56–108); shown

5

6

7

8

9

11

15

16

17

19

25

26

31

33

34

35

2

2a

2b

2c

2d

4

Ref.

No.

1

Part No.

Description Qty.

237–279 17:1 RATIO SENATOR PUMP

See 308–353 for parts

238–271 CART, portable

Includes replaceable items 2a–2d

113–362 . WHEEL

113–436 . RING, retaining

113–361 . CAP

191–605 . BRACKET

238–620 FLUID FILTER, with 250 micron

1

(60 mesh) stainless steel element and drain valve

See manual 307–296 for parts

112–839 BUSHING, reducer; 2” npt(m) x

1” npt(f); zinc-plated malleable iron

100–088 ELBOW, street, 90 ; 2” npt(m x f); chrome-plated malleable iron

1

1

1

169–528 TUBE, suction; aluminum

237–522 HOSE, suction; nylon; 1 in. (25 mm) ID;

1

1” npt (mbe); 6 ft (1.8 m) long

206–994 THROAT SEAL LIQUID;

1

8 oz (0.5 liter); not shown 1

179–970 NIPPLE, reducing; 1” npt x 3/4 npsm 1

2

2

1

2

1

100–004 CAPSCREW, hex hd; 3/8–16 unc–2a;

1.25 in. (31 mm) long 4

100–133 LOCKWASHER, external tooth; 3/8” 4

4 100–131 NUT, full, hex; 3/8–16 unc–2b

238–881 AIR REGULATION KIT

See manual 308–648 for parts

238–374 HOSE, air; 3/4 in. (19 mm) ID;

1

238–909

210–658

111–040

3/4 npt (mbe); 21 in. (533 mm) long

GROUND WIRE AND CLAMP

BALL VALVE; 3/8 npt (mbe)

1

1

1

NUT, lock; with nylon insert; 5/16–18 4

100–057 SCREW, cap, hex hd;

5/16–18 x 3/4 in. (19 mm) long

191–383 BRACKET, mounting

4

1

63

64

65

66

67

101

37

48

54

56

Ref.

No.

36

60

61

62

102

103

104

106

107

108

Part No.

Description Qty.

113–428 SCREW, hex socket;

1/4–20 x 1 in. (25 mm) long

102–040 NUT, lock, hex; 1/4–20

113–498 RELIEF VALVE, air;

110 psi (7.6 bar, 0.76 MPa)

156–849 NIPPLE; 3/8 npt;

Used on Model 237–289 only

157–785 UNION, swivel; 3/4 npt(m) x

3/4 npsm(f) swivel

1

1

162–453 NIPPLE; 1/4 npt x 1/4 npsm

156–971 NIPPLE; 1/4 npt

113–549 GUN AIR REGULATOR; 1/4 npt(f) inlet and outlet; 5–150 psi

(0.3–10 bar, 0.03–1.0 MPa) pressure range

113–630 ELBOW, 45 ; 1/8 npt (m x f)

159–840 ADAPTER, increase;

1/8 npt(m) x 1/4 npt(f)

101–689 GAUGE, air

155–541 UNION, swivel, 90 ;

1/4 npt(m) x 1/4 npsm(f)

100–139 PLUG, pipe; 1/8 npt

210–867 HOSE, air; buna-N; 5/16” (8 mm) ID; cpld 1/4 npsm (fbe) swivel;

25 ft (7.6 m) long 1

239–001 AIR-ASSISTED AIRLESS SPRAY GUN;

See manual 308–640 for parts

236–074 HOSE, fluid; nylon; 1/4” (6.3 mm) ID; cpld 1/4 npt (fbe) swivel;

1

2

1

1

1

1

1

1

1

1

4

4 spring guards both ends;

25 ft (7.6 m) long

103–473 STRAP, tie

189–018 SWIVEL, gun

150–287 COUPLING; 1/4 npt(m) x 3/8 npt(f)

AAR–XXX SPRAY TIP OF CHOICE (not shown) 1

1

1

1

8

308-472 13

26

56

4

16

17

11

1

15

2d

31

Parts

Part No. 237–405, Series B (includes items 1–108)

107

6

5

25 (Ref)

36

25

61

66

62

2

33

34

2c

37

35

19

67

48

2a

101

2b

103

65

64

63

60

66

102

106

101 (Ref)

8 103 (Ref)

104

7

06275

14 308-472

Parts

Part No. 237–405, Series B (includes items 1–108)

5

6

7

8

16

17

19

25

26

31

33

34

9

11

15

1

2

Ref.

No.

2a

2b

2c

2d

4

Part No.

Description Qty.

237–366 33:1 RATIO BULLDOG PUMP

See 308–417 for parts

238–271 CART, portable

Includes replaceable items 2a–2d

113–362 . WHEEL

113–436 . RING, retaining

113–361 . CAP

191–605 . BRACKET

238–620 FLUID FILTER, with 250 micron

(60 mesh) stainless steel element and drain valve

See manual 307–296 for parts

102–000 BUSHING, reducer; 1–1/2” npt(m) x

1

1

1” npt(f); malleable iron

101–552 ELBOW, street, 90 ; 1–1/2” npt(m x f);

169–528 chrome-plated malleable iron

TUBE, suction; aluminum

237–522 HOSE, suction; nylon; 1 in. (25 mm) ID;

1” npt (mbe); 6 ft (1.8 m) long

1

1

1

1

206–994 THROAT SEAL LIQUID;

8 oz (0.5 liter); not shown

175–013 NIPPLE; 3/4 npt

100–004 CAPSCREW, hex hd; 3/8–16 unc–2a;

1.25 in. (31 mm) long 4

100–133 LOCKWASHER, external tooth; 3/8” 4

100–131 NUT, full, hex; 3/8–16 unc–2b 4

1

1

1

2

2

2

1

238–881 AIR REGULATION KIT

See manual 308–648 for parts

238–374 HOSE, air; 3/4 in. (19 mm) ID;

3/4 npt (mbe); 21 in. (533 mm) long

238–909 GROUND WIRE AND CLAMP

210–658 BALL VALVE; 3/8 npt (mbe)

111–040

1

1

1

1

NUT, lock; with nylon insert; 5/16–18 4

100–057 SCREW, cap, hex hd;

5/16–18 x 3/4 in. (19 mm) long 4

63

64

65

66

67

101

102

103

104

106

107

108

56

60

61

62

Ref.

No.

35

36

37

48

Part No.

Description Qty.

191–383 BRACKET, mounting

113–428 SCREW, hex socket;

1/4–20 x 1 in. (25 mm) long

102–040 NUT, lock, hex; 1/4–20

113–498 RELIEF VALVE, air;

110 psi (7.6 bar, 0.76 MPa)

157–785 UNION, swivel; 3/4 npt(m) x

3/4 npsm(f) swivel

162–453 NIPPLE; 1/4 npt x 1/4 npsm

156–971 NIPPLE; 1/4 npt

113–549 GUN AIR REGULATOR; 1/4 npt(f) inlet and outlet; 5–150 psi

(0.3–10 bar, 0.03–1.0 MPa)

1

1 pressure range

113–630 ELBOW, 45 ; 1/8 npt (m x f)

159–840 ADAPTER, increase;

1/8 npt(m) x 1/4 npt(f)

101–689 GAUGE, air

155–541 UNION, swivel, 90 ;

1/4 npt(m) x 1/4 npsm(f)

100–139 PLUG, pipe; 1/8 npt

210–868 HOSE, air; buna-N; 5/16” (8 mm) ID; cpld 1/4 npsm (fbe) swivel;

50 ft (15.2 m) long 1

239–001 AIR-ASSISTED AIRLESS SPRAY GUN;

See manual 308–640 for parts 1

2

1

1

1

1

1

238–386 HOSE, fluid; nylon; 1/4” (6.3 mm) ID;

1/4 npsm(fbe); 50 ft (15.2 m) long

103–473 STRAP, tie

189–018 SWIVEL, gun

150–287 COUPLING; 1/4 npt(m) x 3/8 npt(f)

AAR–XXX SPRAY TIP OF CHOICE (not shown) 1

1

1

1

8

4

4

1

1

1

308-472 15

26

13

11

12

4

16

17

10

1

15

2d

31

107

Parts

Part No. 238–140, Series B (includes items 1–108)

8

6

5

25 (Ref)

36

25

61

66

62

65

64

63

60

66

2

33

34

2c

37

35

19

67

48

2a

2b

101

103

102

106

101 (Ref)

7

103 (Ref) 104

06422

16 308-472

Parts

Part No. 238–140, Series B (includes items 1–108)

9

10

11

12

13

15

16

17

19

5

6

7

8

25

26

1

2

Ref.

No.

2a

2b

2c

2d

4

Part No.

Description Qty.

236–463 41:1 RATIO BULLDOG PUMP

See 308–349 for parts

238–271 CART, portable

Includes replaceable items 2a–2d

113–362 . WHEEL

1

113–436 . RING, retaining

113–361 . CAP

191–605 . BRACKET

238–620 FLUID FILTER, with 250 micron

(60 mesh) stainless steel element and drain valve

See manual 307–296 for parts

102–000 BUSHING, reducer; 1–1/2” npt(m) x

1” npt(f); malleable iron

101–552 ELBOW, street, 90 _ ; 1–1/2” npt(m x f); chrome-plated malleable iron

169–528 TUBE, suction; aluminum

237–522 HOSE, suction; nylon; 1 in. (25 mm) ID;

1

1

1

1

2

2

1

1

2

1” npt (mbe); 6 ft (1.8 m) long

206–994 THROAT SEAL LIQUID;

8 oz (0.5 liter); not shown

190–413 NIPPLE; 3/4 npt x 1–3/8 unf–2a;

PTFE r

190–412 NUT; 1–3/8 unf–2b; carbon steel

100–004 CAPSCREW, hex hd; 3/8–16 unc–2a;

1.25 in. (31 mm) long

1

1 carbon steel 1

190–411 ADAPTER; 3/4 npt(m); carbon steel 1

112–973 O-RING; 1

1

4

100–133 LOCKWASHER, external tooth; 3/8” 4

100–131 NUT, full, hex; 3/8–16 unc–2b

238–881 AIR REGULATION KIT

4

See manual 308–648 for parts

238–374 HOSE, air; 3/4 in. (19 mm) ID;

3/4 npt (mbe); 21 in. (533 mm) long

238–909 GROUND WIRE AND CLAMP

1

1

1

102

103

104

106

107

108

63

64

65

66

67

101

35

36

37

48

Ref.

No.

31

33

34

60

61

62

Part No.

Description Qty.

210–658

111–040

BALL VALVE; 3/8 npt (mbe) 1

NUT, lock; with nylon insert; 5/16–18 4

100–057 SCREW, cap, hex hd;

5/16–18 x 3/4 in. (19 mm) long

191–383 BRACKET, mounting

4

1

113–428 SCREW, hex socket;

1/4–20 x 1 in. (25 mm) long

102–040 NUT, lock, hex; 1/4–20

113–498 RELIEF VALVE, air;

110 psi (7.6 bar, 0.76 MPa)

162–453 NIPPLE; 1/4 npt x 1/4 npsm

156–971 NIPPLE; 1/4 npt

113–549 GUN AIR REGULATOR; 1/4 npt(f) inlet and outlet; 5–150 psi

(0.3–10 bar, 0.03–1.0 MPa) pressure range

113–630 ELBOW, 45 _ ; 1/8 npt (m x f)

159–840 ADAPTER, increase;

4

4

1

1

1

1

1

1/8 npt(m) x 1/4 npt(f)

101–689 GAUGE, air

155–541 UNION, swivel, 90 _ ;

1/4 npt(m) x 1/4 npsm(f)

100–139 PLUG, pipe; 1/8 npt

210–868 HOSE, air; buna-N; 5/16” (8 mm) ID; cpld 1/4 npsm (fbe) swivel;

50 ft (15.2 m) long 1

239–001 AIR-ASSISTED AIRLESS SPRAY GUN;

See manual 308–640 for parts

238–386 HOSE, fluid; nylon; 1/4” (6.3 mm) ID;

1/4 npsm(fbe); 50 ft (15.2 m) long

103–473 STRAP, tie

1

1

8

189–018 SWIVEL, gun

150–287 COUPLING; 1/4 npt(m) x 3/8 npt(f)

AAR–XXX SPRAY TIP OF CHOICE (not shown) 1

1

1

1

1

2

1

Manual Change Summary

Cart Change: All models now use Part No. 238–271

Cart.

Air Regulation Kit: All models now use Part No.

238–881 Air Regulation Kit.

Ground Wire: All models now use Part No. 238–909

Ground Wire.

Series Levels: All models advance to Series B.

Added Models: Models 237–405 and 238–140 are added to the manual.

308-472 17

Category

Maximum fluid working pressure

Maximum air input pressure

Ratio

Pump performance data

Air consumption data

Air inlet size

Fluid outlet size (at fluid filter)

Fluid inlet size

Maximum operating temperature

Wetted parts

Technical Data

Data

Models 237–289 and 237–294: 1700 psi (117 bar, 11.7 MPa)

Model 237–405: 3300 psi (228 bar, 22.8 MPa)

Model 238–140: 4100 psi (283 bar, 28.3 MPa)

100 psi (7 bar, 0.7 MPa)

Models 237–289 and 237–294: 17:1

Model 237–405: 33:1

Model 238–140: 41:1

Models 237–289 and 237–294: See pump manual 308–353

Model 237–405: See pump manual 308–417

Model 238–140: See pump manual 308–349

Models 237–289 and 237–294: See pump manual 308–353

Model 237–405: See pump manual 308–417

Model 238–140: See pump manual 308–349

3/4 npsm(f)

3/8 npt(m)

Models 237–289 and 237–294: 2 in. npt(f)

Models 237–405 and 238–140: 1–1/2 in. npt(f)

180 _ F (82 _ C)

Models 237–289 and 237–294: See pump manual 308–353

Model 237–405: See pump manual 308–417

Model 238–140: See pump manual 308–349

Fluid Filter: See manual 307–296

Suction Hose and T ube: Nylon, Aluminum

Fluid Fittings: Zinc-Plated Malleable Iron, Zinc-Plated Carbon Steel

Drain Tube, Fluid Hoses: Nylon

PTFE r

Sound Pressure Levels (dBa)

(tested in accordance with ISO 3744)

Air Motor

Standard Senator

40 psi

(2.8 bar,

0.28 MPa)

84.3 dBa

Standard Bulldog 83.0 dBa

Reduced Icing Quiet Bulldog 81.7 dBa

Input Air Pressures at 15 cycles per minute

58 psi

(4 bar,

0.4 MPa)

86.4 dBa

70 psi

(4.8 bar,

0.48 MPa)

87.8 dBa

90 psi

(6 bar,

0.6 MPa)

89.8 dBa

85.7 dBa

82.9 dBa

87.5 dBa

83.7 dBa

90.5 dBa

86.0 dBa

100 psi

(7 bar,

0.7 MPa)

91.2 dBa

91.0 dBa

86.5 dBa

18 308-472

Model 237–294 Shown

Dimensions

A B

C

04936A

Pump Model

237–289

237–294

237–405

238–140

A B C Width Across

Wheels

Weight

49.6 in. (1261 mm) 28.1 in. (714 mm) 30.7 in. (780 mm) 26 in. (660 mm) 270 lb (123 kg)

49.6 in. (1261 mm) 28.1 in. (714 mm) 30.7 in. (780 mm) 26 in. (660 mm) 295 lb (134 kg)

49.5 in. (1258 mm) 28.1 in. (714 mm) 30.7 in. (780 mm) 26 in. (660 mm) 265 lb (120 kg)

49.5 in. (1258 mm) 28.1 in. (714 mm) 30.7 in. (780 mm) 26 in. (660 mm) 265 lb (120 kg)

308-472 19

The Graco Warranty and Disclaimers

WARRANTY

Graco warrants all equipment listed in this manual which is manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale by an authorized Graco distributor to the original purchaser for use. Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written recommendations.

This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of Graco equipment with structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or maintenance of structures, accessories, equipment or materials not supplied by Graco.

This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The equipment will be returned to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect in material or workmanship, repairs will be made at a reasonable charge, which charges may include the costs of parts, labor, and transportation.

THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING

BUT NOT LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PUR-

POSE.

Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other remedy (including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any other incidental or consequential loss) shall be available. Any action for breach of warranty must be brought within two

(2) years of the date of sale.

GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

FOR A PARTICULAR PURPOSE IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS, OR COMPONENTS

SOLD BUT NOT MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors, switches, hose, etc.) are subject to the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance in making any claim for breach of these warranties.

For Sales to Canadian Customers:

Except as expressly stated herein, Graco makers no representations, warranties or conditions, express, implied or collateral, concerning any goods or services sold, and GRACO SHALL NOT BE LIABLE IN ANY MANNER FOR any other representation, warranty or condition of any kind, whether arising by operation of law or otherwise, including but not limited to, WARRANTIES OF

MERCHANTABLE QUALITY OR FITNESS FOR A PARTICULAR PURPOSE.

LIMITATION OF LIABILITY

In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment hereunder, or for the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract, breach of warranty, the negligence of Graco, or otherwise.

SPECIAL WARRANTY FOR DURA-FLO DISPLACEMENT PUMP LOWERS

For no additional cost, Graco offers an extended wqarranty for Dura-Flo displacement pump lowers for 36 months from the date of sale by an authorized Graco distributor to the original purchaser for use. All other terms and conditions of the Graco warranty shall apply.

Graco Phone Numbers

TO PLACE AN ORDER, contact your Graco distributor, or call this number to identify the distributor closest to you:

1–800–367–4023 Toll Free

Sales Offices: Atlanta, Chicago, Detroit, Los Angeles

Foreign Offices: Belgium; Canada; England; Korea; Switzerland; France; Germany; Hong Kong; Japan

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

PRINTED IN U.S.A. 308–472 June 1995 Revised June 1996