Table of Contents

Safety Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Service

Remove the Fluid and Side Covers . . . . . . . . . . . 14

Ball Check Repair . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Diaphragm Repair . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Air Valve Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Shaft Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . . . . 26

Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

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.

General Information

DFig. 2 shows a wall mounted HVLP spray applica- tion. It is only a guide for selecting and installing system components. Contact your Graco distributor for assistance in planning a system to suit your needs.

DAlways use Genuine Graco Parts and Accessories, available from your Graco distributor. If you supply your own accessories, be sure they are adequately sized and pressure rated for your system.

DUse a compatible, liquid thread sealant on all male threads. Tighten all connections firmly to avoid air or fluid leaks.

NOTE: On all npt threads, tighten to 2???3 turns past finger tight.

DReference numbers and letters in parentheses refer to the callouts in the figures and the parts lists on pages 23???22.

DIn a spray system, ventilate the spray booth.

Tightening Threaded Fasteners Before

First Use

NOTE: Before using pump, loosen fluid cover screws (38) 1???2 turns and then retorque to 13.6 NSm

(10 ft???lb).

See the Service section for torque specifications.

DAfter unpacking the pump, and before using it for the first time, check and retorque all external fas- teners.

DAfter the first day of operation, retorque the fasten- ers.

DAs a general guideline, retorque fasteners every two months.

WARNING

FIRE AND EXPLOSION HAZARD

To prevent hazardous concentrations of toxic and/or flammable vapors, spray only in a properly ventilated spray booth. Never operate the spray gun unless ventilation fans are operating.

Check and follow all of the national, state, and local codes regarding air exhaust velocity requirements.

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.

1.Read TOXIC FLUID HAZARD on page 5.

2.Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the Technical Data section of all equipment manu- als. Read the fluid and solvent manufacturer???s warnings.

Mounting the Pump

DMount the pump in a well-ventilated area, with sufficient clearance on all sides for operator access and servicing.

DBe sure the mounting can support the weight of the pump, hoses, and accessories, as well as the stress caused during operation.

DThe pump may be mounted vertically or horizontal- ly. Be sure the pump is level in all directions.

DWall, pail, stand, or portable cart mounting kits are available from Graco. For other mountings, be sure the pump is adequately secured. The pump has two mounting holes for 0.35 in. (9 mm) screws. See the Dimension drawing on page 25.

Grounding

WARNING

FIRE AND EXPLOSION HAZARD

This pump must be grounded. Before operating the pump, ground the system as explained below. Also read the sec- tion FIRE AND EXPLOSION HAZARD on page 4.

To reduce the risk of static sparking, ground the pump and all other equipment used or located in the pumping area. Check your local electrical code for detailed grounding instructions for your area and type of equip- ment.

Ground all of this equipment:

DPump: Attach a ground wire (Y) to the pump???s grounding screw (35) and secure with the screw, as shown in Fig. 1. Connect the clamp end of the ground wire to a true earth ground. Order Part No. 238909 Ground Wire and Clamp.

35Y

ti1030b

Fig. 1

DAir and fluid hoses: Use only electrically conductive hoses.

DAir compressor: Follow the manufacturer???s recom- mendations.

DSolvent pails used when flushing: Follow your local code. Use only metal pails, which are conductive. Do not place the pail on a non-conductive surface, such as paper or cardboard, which interrupts the grounding continuity.

DFluid supply container: Follow your local code.

Air Line

WARNING

A bleed-type master air valve (B) is required in your system to relieve air trapped between this valve and the pump. See Fig. 2. Trapped air can cause the pump to cycle unexpectedly, which could result in serious injury, including splashing in the eyes or on the skin, injury from moving parts, or contamina- tion from hazardous fluids.

1.Install the air line accessories as shown in Fig. 2. Mount these accessories on the wall or on a bracket. Be sure the air line supplying the acces- sories is electrically conductive.

a.The fluid pressure can be controlled in two ways, either by controlling the air into the pump with the air regulator (F) or the fluid out of the pump with the fluid regulator (H).

b.Locate a bleed-type master air valve (B) close to the pump, to relieve trapped air. See the WARNING at left. Locate another air valve (E) upstream from all air line accessories, to isolate them during cleaning and repair.

c.Install an air line filter (D) to remove harmful contaminants such as dirt, moisture, and oil from the compressed air supply.

2.The air valve does not require lubrication.

3.Install an electrically conductive, flexible air hose

(C) between the accessories and the pump air inlet

(T). Use a minimum 1/4??? (6.3 mm) ID air hose. Screw an air line quick disconnect coupler (V) onto the end of the air hose and screw the mating fitting into the pump air inlet snugly. Do not connect the coupler to the fitting yet.

KEY

ATRITON 308 Pump

BBleed-type master air valve (required for pump)

CAir supply line

DAir line filter

EAir line shutoff valve

FPump air regulator

GGun air regulator (used in spray system only)

HFluid pressure regulator (used in spray

system only)

JDrain/circulation valve

KDrain tube

LSuction tube

MPump fluid inlet

NPump fluid outlet

PFluid hose (shown connected to gun in spray system)

RGun air hose (used in spray system only)

SSpray gun (used in spray system only)

TPump air inlet

UAgitator (used in spray system only)

VAir line quick disconnect

Y Ground wire

J

N

K

G T

F

B

S

HY R

E D J

Y

K

H

ti1020a

A

M

L

ti1007a

Fluid Suction Line

DScrew the suction line (L) into the pump inlet (M) snugly. Use a compatible liquid thread sealant on connections to prevent air from getting into the fluid line.

DDo not pressure feed this pump.

DSee the Technical Data on page 24 for maximum suction lift.

DUse an agitator (U) to prevent fluid from settling out. Part No. 245081 Agitator Kit (accessory) is available.

Fluid Outlet Line

WARNING

A fluid drain valve (J) is required in your system to relieve pressure in the hose if it is plugged. See Fig. 2. The drain valve reduces the risk of serious injury, including splashing in the eyes or on the skin, or contamination from hazardous fluids when relieving pressure. Install the valve close to the pump fluid outlet. To use the valve as a circulation valve, connect a tube (K) between the valve and pail.

CAUTION

Some systems may require installation of a pressure relief valve at the pump outlet to prevent overpres- surization and rupture of the pump or hose.

Thermal expansion of fluid in the outlet line can cause overpressurization. This can occur when using long fluid lines exposed to sunlight or ambient heat, or when pumping from a cool to a warm area (for example, from an underground tank).

Overpressurization can also occur if the pump is being used to feed fluid to a piston pump, and the intake valve of the piston pump does not close, causing fluid to back up in the outlet line.

DUse electrically conductive fluid hoses (P). Screw the fluid fitting into the pump outlet (N) snugly.

DInstall a fluid regulator (H) at the pump fluid outlet to control fluid pressure, if desired. See Air Line, step 1a, for another method of controlling pressure.

DInstall a fluid drain valve (J) near the fluid outlet. See the WARNING at left.

Flush the Pump Before First Use

The pump was tested in lightweight oil. If the oil could contaminate the fluid you are pumping, flush the pump thoroughly with a compatible solvent. Follow the steps under Starting and Adjusting the Pump on page 11.

Pressure Relief Procedure

WARNING

The system remains pressurized until pressure is manually relieved. To reduce the risk of serious injury from pressurized fluid, accidental spray from the gun, or splashing of any fluid, follow this proce- dure whenever you

DStop spraying

DAre instructed to relieve pressure

DCheck or service any system equipment

DInstall, clean, or change spray nozzles

1.Shut off the bleed-type air valve (B).

2.In a spray system, hold the gun (S) firmly against a grounded metal pail and trigger the gun to relieve the fluid pressure.

3.Place the drain tube (K) in a waste pail. Open the drain/circulation valve (J) to relieve any fluid pres- sure trapped in the system.

Starting and Adjusting the Pump

2.If lifting the pump, follow the Pres-

sure Relief Procedure above.

Explosion Hazard on page 4.

4.Check all fittings to be sure they are tight. Use a compatible liquid thread sealant on all male threads. Tighten the fluid inlet and outlet fittings snugly. Do not overtighten the fittings.

NOTE: Before using he pump, re???torque fluid cover screws (38) to 10 ft???lb (13.6 NSm).

5.Place the suction tube (L, if used) in the fluid to be pumped.

6.Place the fluid hose (P) in a container.

7.Close the drain/circulation valve (J).

8.Close the pump air regulator (F). Open all bleed- type master air valves (B, E).

9.If the fluid hose has a dispensing device, hold it open while continuing with the following step. Slowly open the air regulator (F) until the pump starts to cycle. Allow the pump to cycle slowly until all air is pushed out of the lines and the pump is primed.

If you are flushing, run the pump long enough to thoroughly clean the pump and hoses. Close the air regulator. Remove the suction tube from the solvent and place it in the fluid to be pumped.

Pump Shutdown

WARNING

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

Pressure Relief Procedure at left.

At the end of the work shift, flush the pump and relieve pressure.

Tightening Threaded Connections

Before each use, check all hoses for wear or damage. Replace as necessary. Check that all threaded con- nections are tight and leak-free.

NOTE: Periodically, re???torque fluid cover screws (38) to 10 ft???lb (13.6 NSm).

Cleaning

Clean the outside of the equipment daily, using a soft cloth and compatible solvent.

Clean the suction tube (L) and inlet strainer daily, using a compatible solvent.

Clean the air filter (D) in your main air line at least once a week.

Storage

Before storing the pump, always flush it and relieve pressure.

Preventive Maintenance Schedule

Establish a preventive maintenance schedule, based on the pump???s service history. This is especially impor- tant for prevention of spills or leakage due to dia- phragm failure.

WARNING

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

Pressure Relief Procedure on page 11.

1.Relieve the pressure before checking or servicing the equipment.

2.Check all possible problems and causes before disassembling the pump.

Remove the Fluid and Side Covers

Tools Required

DTorque wrench

D2.5 mm allen wrench

D6 mm allen wrench

DAdjustable wrench

Disassembly

WARNING

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

Pressure Relief Procedure on page 11.

1.Relieve the pressure.

2.Disconnect the hoses and ground wire.

3. Remove the pump from its mounting.

CAUTION

Be careful that the ball checks do not fall out when you remove the fluid covers (32).

4.Remove the six screws (38) and top cover (32) from the center housing (1). Remove the ball check seals (24). Remove the bottom cover and seals.

NOTE: Always replace the ball check seals (24) when- ever the fluid covers (32) are removed. These seals are included in the four repair kits.

NOTE: Perform step 5 only if you are servicing the air valve or the diaphragm shaft.

5.Remove the two screws (39) and take off the side cover (31) and felt dampener (29).

Remove the Fluid and Side Covers (continued)

Reassembly

1.Clean all parts and inspect for wear or damage. Replace parts as needed.

2.If necessary, reinstall the felt dampener (29) and side cover (31). Torque the screws (39) to 28 in-lb (3.1 NSm).

3.Install new ball check seals (24).

4.Place the fluid covers (32) on the housing (1). Align the mounting holes (H) in the fluid covers with the holes in the housing. Install the screws (38) loosely, then torque oppositely and evenly to 10 ft-lb (13.6 NSm).

5.Reinstall the pump on its mounting.

6.Reconnect the ground wire and hoses.

Ball Check Repair

Tools Required

D O-ring pick

Disassembly

NOTE: Ball Check Repair Kit 245067 is available. Parts included in the kit are marked with a double dagger, for example (21}). Use all the parts in the kit for the best results.

1.Remove the fluid covers. See page 14.

2.Remove the inlet and outlet ball checks. Note that the orientation of the inlet check parts is different from the outlet check parts. See Fig. 4.

NOTE: If the inlet seats (26) are difficult to remove, drive them out from the opposite side using a brass rod and hammer.

3.Clean all parts and inspect for wear or damage. Replace parts as needed.

Reassembly

1.Reinstall the inlet and outlet ball checks on one side of the pump. The inlet and outlet checks are assembled differently. Install the parts exactly as shown in Fig. 4.

2.Install one cover (32) loosely, to prevent the ball checks from falling out. See page 14.

3.Turn the pump over and install the ball checks on the opposite side, exactly as shown.

4.Reinstall the fluid covers. See page 14.

Diaphragm Repair

Tools Required

DM8 bolt

DM8 hexnut

DAdjustable wrench, or vise

NOTE: Diaphragm Repair Kit 245065 is available. Parts included in the kit are marked with an asterisk, for example (6*). Always replace both diaphragms for the best results.

1. Remove the fluid covers. See page 14.

WARNING

Wear gloves when removing the diaphragms to reduce the risk of cuts.

2.Unscrew one diaphragm (6) from the shaft (5) by hand. See Fig. 5.

2

1 38

6*

2

24*

24*

*6

32

1 38

Fig. 5

3.Thread an M8 hexnut (A) onto an M8 bolt. Screw the bolt into the shaft (5) until it bottoms out. Thread the nut down to the shaft to lock it.

4.Hold the nut with a wrench or vise to keep the shaft from turning. Unscrew the other diaphragm

(6) by hand.

NOTE: If you cannot remove the second diaphragm, refer to Shaft Repair Disassembly on page 20.

Reassembly

1.Screw the new diaphragms (6*) into the shaft (5) handtight.

2.Replace the ball check seals (24*) with the new seals in the kit.

3.Reinstall the fluid covers. See page 14.

110 ft-lb (13.6 NSm)

2Align

3Use M8 bolt and nut to keep shaft from turning.

A 3

ti1033a

Air Valve Repair

Tools Required

D3 mm allen wrench

DNeedlenose pliers

DRetaining ring removal tool

DO-ring pick

Disassembly

NOTE: Air Valve Repair Kit 245066 is available. Parts included in the kit are marked with a dagger, for exam- ple (8{). Use all the parts in the kit for the best results.

1.Remove the side cover (31) and felt dampener (29).

2.Remove the four screws (36), air valve cover (17), and gasket (16). See Fig. 7.

3.See Fig. 6. Note the orientation of the air valve plate (13) relative to the fluid outlet arrow, with ???POM??? marking up. Pull the plate out of the center housing (1). Remove the three o-rings (14, 15) and the two o???rings (43) from the plate. See Fig. 7.

4.Remove the air valve cup (12) from the center housing (1).

5.Remove the retaining rings (11) and plug (9) from both sides, and slide the carriage (7) from the center housing (1). Remove the o-rings (8, 10) from the carriage and the plug.

6.Clean all parts and inspect for wear or damage. Replace parts as needed.

Orient ???POM??? marking on air

1valve plate as shown in relation to fluid outlet arrow.

1

???POM??? marking

fluid outlet arrow 1

13{

ti15226a

Fig. 6

Air Valve Repair (continued)

Reassembly

1.Lubricate the o-rings (8{) and install them on the carriage (7). Slide the carriage into the center housing (1) so the notch faces out, as shown in Fig. 7.

2.Lubricate each o-ring (10{) and install them on the plugs (9). Insert a plug in each side to secure the carriage (7). Install the retaining rings (11) to hold these parts in place.

3.Install the air valve cup (12{) in the notch of the carriage (7) so the open side faces out.

4.Install two o???rings (43) in the counterbore of the air motor.

5.Lubricate the large o-ring (15{) and the two small o-rings (14{) and install them on the air valve plate (13{). Align the point on the plate with the arrow on the center housing (1) as shown in Fig. 6. Install the plate in the housing.

6.Install the gasket (16{). Note the orientation.

7.Reinstall the air valve cover (17) and screws (36). Torque the screws to 28 in-lb (3.1 NSm).

8.Replace the ball check seals (24{) with the new seals in the kit.

9.Reinstall the felt dampener (29) and side cover (31). See page 14.

Shaft Repair

Tools Required

DNeedlenose pliers

DO-ring pick

DRetaining ring removal tool

DVise with soft jaws

Disassembly

NOTE: Shaft Repair Kit 24A155 is available. Parts included in the kit are marked with a star, for example (5l). Use all the parts in the kit for the best results.

NOTE: Shaft and Bearing Repair Kit is available. Parts included in the kit are marked with a symbol, for exam- ple (44l). Use all the parts in the kit for the best results.

1.Remove the fluid covers. See page 14. Remove the side cover (31) and felt dampener (29).

2.Disassemble the air valve. See page 18.

3.Remove the diaphragms (6). See page 17.

4.Remove the retaining rings (4l) from the shaft (5). See Fig. 8.

5.Slide the shaft (5) out of the center housing (1). Remove the valve carriage (3) from the housing.

6.Remove the retaining rings (47) and bearings (44). Remove the o???rings (45, 46) from the bearings.

CAUTION

Do not grip the shaft with tools that can scratch or damage the shaft, such as wrenches or pliers.

7.If you could not remove one diaphragm from the shaft, place the shaft in a vise with soft jaws. Unscrew the remaining diaphragm (6) from the shaft (5) by hand.

8.Clean all parts and inspect for wear or damage. Replace parts as needed.

Reassembly

1.Screw one diaphragm (6) into the shaft (5l) handtight.

2.Lubricate the o???rings (45, 46) and install on the bearings (44). Install the bearings in the center housing (1) and secure with the retaining rings (47).

3.Place the valve carriage (3) in the center housing

(1). Grease the shaft (5l) and slide it through the center housing and valve carriage.

4.Install the retaining rings (4l) on the shaft (5l).

5.Screw the second diaphragm (6) into the shaft (5l) handtight.

6.Reassemble the air valve and carriage (see page 18), using the new o-rings (8l, 10l, 14l, 15l) and gasket (16l) included in the shaft repair kit.

7.Replace the ball check seals (24l) with the new seals in the kit.

8.Reinstall the fluid covers. See page 14.

3

32

110 ft-lb (13.6 NSm).

2Lubricate.

3Align.

428 in-lb (3.1 NSm).

5Align. See Fig. 6.

1 38

Fig. 8

31

39 4

ti1035E

*6

33 30 40Y

37 20

18

28

7

{l8 {l10

9

11

}22

}27

}21 }23

*{}l24

19

45gl

gl46 gl47 44gl

Detail of Grounding Screw

26}

25}z

ti1030b

1

3

4l

12{

14{l

15{l

13{

16{l

17

36

43{l

29

31

6*

Sound Pressure Levels in dB(A)*

(measured at 1 m from unit)

Sound Power Levels in dB(A)*

(tested in accordance with ISO 3744)

To find Fluid Outlet Pressure (psi/MPa/bar) at a specific fluid flow (lpm/gpm) and operating air pressure (psi/MPa/bar):

1.Locate desired flow along bottom of chart.

2.Follow vertical line up to intersection with selected fluid outlet pressure curve (black). Follow left to scale to read fluid outlet pressure.

To find Pump Air Consumption (l/min or scfm) at a specific fluid flow (lpm/gpm) and air pressure (psi/MPa/bar):

1.Locate desired flow along bottom of chart.

2.Read vertical line up to intersection with selected air consumption curve (dashes). Follow left to scale to read air consumption.

Fluid Outlet Pressure

Air Consumption

BOTTOM VIEW

4.53 in. (115 mm)

1/4 npt or 1/4 BSPP Air Inlet

4.1 in.

(104 mm)

SIDE VIEW

Aluminum

4.88 in.

(124 mm)

8.2 in.

(208 mm)

ti1037a

3/8 npt or 3/8 BSPP Fluid Outlet

Two 0.35 in. (9 mm) diameter holes, for mounting pump

3/4 npt or M26 x 1.5 Fluid Inlet

SIDE VIEW

SST

9.1 in.

(231.5 mm)

TI3265A