Graco 03761B Operation, Pressure Relief Procedure, Flush the Pump Before Using, Pump Shutdown

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Operation

Pressure Relief Procedure

WARNING

PRESSURIZED EQUIPMENT HAZARD

The system pressure must be manually relieved to prevent the system from starting or spraying acci- dentally. To reduce the risk of an injury from acci- dental spray from the gun, splashing fluid, or moving parts, follow the Pressure Relief Proce- dure whenever you:

Dare instructed to relieve the pressure,

Dstop spraying,

Dcheck or service any of the system equipment,

Dor install or clean the spray nozzle.

1.Shut off the air to the pump.

2.Close the bleed-type master air valve (required in your system).

3.Hold a metal part of the dispensing valve firmly to the side of a grounded metal pail, and trigger the valve to relieve pressure.

4.Open the fluid drain valve (required in your sys- tem) to relieve all fluid pressure, having a contain- er ready to catch the drainage.

5.Leave the drain valve open until you are ready to dispense again.

If you suspect that the nozzle or hose is completely clogged, or that pressure has not been fully relieved after following the steps above, very slowly loosen the hose end coupling and relieve pressure gradually, then loosen completely. Now clear the nozzle or hose.

Flush the Pump Before Using

The pump was tested in lightweight oil, which was left in to protect pump parts. To prevent contamination of the fluid you are pumping, flush the pump with a com- patible solvent before using it.

To flush the pump, connect a short hose to the pump outlet, insert the pump intake into a pail of compatible solvent, direct the hose into a pail, and start the pump as explained at right.

Cycle the pump slowly for at least 5 minutes, then stop and disconnect the air hose. Push up on the ball of the intake valve (N) to drain the lower part of the pump.

See Fig. 4. Turn the pump over to drain the upper part of the pump.

N

03765

Fig. 4

Starting and Adjusting the Pump

With the air valve (K) or regulator (CC) closed, turn on the air supply and connect the air line coupler (L). See Figs. 3 or 5. Make sure all dispensing valves are open.

Slowly open the air valve (K) or regulator (CC) until the pump cycles 5 to 20 cycles per minute. The pump it- self only takes a few strokes to prime. In a large sys- tem, however, the pump may have to be cycled for several minutes to fill all the lines. Once the entire sys- tem is primed, use the air valve or regulator to control pump speed and cycle rate; always use the lowest pressure necessary to get the desired results.

When used for transfer and supply operations with no dispensing valve, the pump will run whenever air is supplied.

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.

1.Disconnect the air line coupler (L).

2.Relieve the pressure.

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Contents Instructions-Parts List Table of ContentsSymbols 307427Fire and Explosion Hazard Pump Models Stubby PumpsBung-Mounted Drum Length Pumps This model isGrounding the System InstallationGeneral Information Mounting the Pump Model 226951 onlySystem Accessories Model 226951 OnlyAll Other Models Model 226951 ShownPressure Relief Procedure Flush the Pump Before UsingStarting and Adjusting the Pump OperationMaintenance Troubleshooting Problem Cause SolutionPump Service Disconnecting the Air MotorReconnecting the Air Motor Pressure Relief Procedure onPump Parts Bung Mount Drum-Length Pumps, Carbon Steel ModelsDescription Qty Model 226940 ShownBung Mount Drum-Length Pumps, Stainless Steel Models Model 226953 ShownModel 226943 Shown Stubby Length Pumps Carbon Steel ModelsModel 226943, Series B, leather packed Stubby Length Pumps Stainless Steel Models Model 226945 ShownBung Mount Adjustable Length Pump, Carbon Steel Model Model 226951, Series B, rubber packed Description QtyDisplacement Pump Service Before You StartIntake Valve Piston ValveDisplacement Pump Parts Model 215953 Displacement Pump, Series DModel 215956 Displacement Pump, Series C Liter 55 Gallon Size, Carbon Steel, Leather PackedModel 215954 Displacement Pump, Series D Model 215957 Displacement Pump, Series CLiter 55 Gallon Size, Carbon Steel, Polyethylene Packed Stubby Size, Carbon Steel, Polyethylene PackedModel 237254 Displacement Pump, Series a CylinderModel 237449 Displacement Pump, Series a Liter 55 Gallon Size, Carbon Steel, Ptfe PackedModel 237255 Displacement Pump, Series a Stubby Size, Carbon Steel, Ptfe PackedCarbon Steel Displacement PUMPS, with rubber packings Model 218113 Displacement Pump, Series a Model 218114 Displacement Pump, Series aLiter 55 Gallon Size, Carbon Steel, Rubber Packed Stubby Size, Carbon Steel, Rubber PackedModel 218116 Displacement Pump, Series a Adjustable Length, Carbon Steel, Rubber PackedDisplacement Pump Service Model 215955 Displacement Pump, Series B Liter 55 Gallon Size, Stainless Steel, Polyethylene PackedModel 215958 Displacement Pump, Series B Stubby Size, Stainless Steel, Polyethylene Packed307427 Model 237253 Displacement Pump, Series a Liter 55 Gallon Size, Stainless Steel, Ptfe PackedModel 237256 Displacement Pump, Series a Stubby Size, Stainless Steel, Ptfe PackedStainless Steel Displacement PUMPS, with rubber packings Model 220440 Displacement Pump, Series a Liter 55 Gallon Size, Stainless Steel, Rubber PackedModel 220439 Displacement Pump, Series a Stubby Size, Stainless Steel, Rubber PackedAccessories Wall Mounting Bracket Carbon Steel. See manualOpen Tank Mounting Clamp Bung AdaptersGround Wire and Clamp Bleed-Type Master Air Valve RequiredAir LIne Filter Air LIne LubricatorDimensions Pump No Overall Length Pump Length Fluid Inlet Fluid OutletTechnical Data Category Data307427 Graco Standard Warranty Graco Information

03761B specifications

The Graco 03761B is a high-performance airless paint sprayer designed to simplify the painting process for both homeowners and professionals. Renowned for its efficiency and ease of use, this sprayer is a go-to tool for delivering a smooth and even finish on a variety of surfaces.

One of the standout features of the Graco 03761B is its powerful motor. It is equipped with a robust electric motor that delivers consistent pressure, enabling the user to apply paint with precision. This feature allows for effective coverage, ensuring that every nook and cranny gets painted without any blotches or inconsistencies. The motor provides a flow rate of up to 0.34 gallons per minute, which translates to faster job completion, ultimately saving both time and effort.

The Graco 03761B utilizes advanced technologies such as the ProXChange Pump, which allows for fast and easy pump replacement on the job site. This innovation minimizes downtime, ensuring the project stays on schedule. Additionally, the airless jet technology allows users to apply coatings without the need for air compressors, reducing the equipment's weight and improving portability.

Another key characteristic of the 03761B is its adjustable pressure settings. Users can easily control the pressure to suit the type of paint and surface being sprayed. This flexibility provides the ability to tackle a wide range of applications, from fine detail work on furniture to large wall or fence projects.

The gun designed for this model is user-friendly, featuring a comfortable grip that reduces fatigue during prolonged use. The model also includes a reversible tip, which allows the user to quickly clear clogs without losing valuable work time.

The Graco 03761B is also designed with durability in mind. Its robust construction ensures that it can withstand the rigors of regular use, making it a reliable companion on job sites or during home improvement projects.

In summary, the Graco 03761B is a powerful, efficient, and versatile airless paint sprayer. With features like a strong motor, ProXChange pump system, adjustable pressure settings, and user-friendly design, it offers exceptional value for anyone looking to achieve a professional-quality finish with ease. Whether for a DIY enthusiast or a painting contractor, the Graco 03761B stands out as a top choice in the airless spray market.
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