Graco 03761B dimensions Displacement Pump Service

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Displacement Pump Service

STAINLESS STEEL DISPLACEMENT PUMPS, with polyethylene, leather, or PTFE packings

This procedure covers the following displacement pumps. Refer to the parts drawings on the indicated pages for an illustration of your pump.

DModel 215955, page 27.

DModel 215958, page 28.

DModel 237253, page 30.

DModel 237256, page 31.

Before You Start

1.Disconnect the displacement pump from the air motor as explained on page 11.

2.Be sure you have all the necessary repair parts on hand to reduce downtime.

3.Repair Kits are available. For best results, use all the new parts in the kit even if the old parts look good. Refer to the parts drawing for your pump.

Intake Valve

1.Unscrew the intake valve housing (23) from the cylinder (13), using a strap wrench. Disassemble the valve and clean and inspect all parts.

2.Inspect the ball (28) and seat in the housing (23) for wear or nicks.

3.Replace parts as necessary. Reassemble as shown in the applicable parts drawing.

Piston Valve

1.Using a strap wrench, grip the cylinder (13) near the outlet housing (6) and unscrew it from the housing. Pull the cylinder down off the piston. Check the inner surface of the cylinder for scoring or wear by running a finger over the surface or holding the part up to the light at an angle.

2.On Models 215955 and 237253, loosen the lower nut (16) and unscrew the valve housing (18) from the connecting rod (17). Unscrew the piston stud (22).

On Models 215958 and 237256, remove the cotter pins (29) from the ball stop pin (30). Remove the ball stop pin and unscrew the piston stud (22) from the displacement rod (15). Be careful not to drop the ball (25).

3.Clean and inspect all piston parts. Be sure to in- spect the ball (25) and its seat on the piston stud (22) for wear or nicks. Replace parts as necessary. Reassemble the piston parts as shown, being sure that the lips of the u-cup packing (21) are facing up. Torque as specified on the applicable illustra- tion. Using a strap wrench, grip the cylinder (13) near the outlet housing (6) and screw it into the housing.

NOTE: On Models 215955 and 237253, when reas- sembling the piston to the connecting rod (17), screw the connecting rod all the way into the displacement rod (15). Tighten the upper nut (16) against the dis- placement rod and torque to 33 NSm (24 ft–lb). Adjust the lower nut (16) to allow 3.1 mm (0.125 in.) free trav- el for the ball (25).

Also, when installing the cylinder (13), make sure that the knurled end is at the bottom.

Throat Packings

1.Remove the cylinder (13) and piston as explained previously. Remove the packing nut (1) and pull the displacement rod (15) out of the top of the out- let housing (6). Inspect the outer surface of the displacement rod for scoring or wear by running a finger over the surface or holding it up to the light at an angle.

2.Remove the throat packings from the outlet hous- ing (6).

3.Clean and inspect the parts for wear or damage. Lubricate the packings before reassembly. Install the parts one at a time, in the same position as before. The lips of the v-packings must face down against fluid pressure.

4.Leave the packing nut (1) loose until the displace- ment rod (15) has been installed.

CAUTION

Insert the displacement rod from the top of the outlet housing to prevent shearing of the packings.

5.Tighten the packing nut just enough to prevent leaking. Overtightening can damage the packings.

6.Reconnect the displacement pump to the air motor as explained on page 11.

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Contents Instructions-Parts List Table of ContentsSymbols 307427Fire and Explosion Hazard Bung-Mounted Drum Length Pumps Pump ModelsStubby Pumps This model isGrounding the System InstallationGeneral Information Mounting the Pump Model 226951 onlyAll Other Models System AccessoriesModel 226951 Only Model 226951 ShownStarting and Adjusting the Pump Pressure Relief ProcedureFlush the Pump Before Using OperationMaintenance Troubleshooting Problem Cause SolutionReconnecting the Air Motor Pump ServiceDisconnecting the Air Motor Pressure Relief Procedure onDescription Qty Pump PartsBung Mount Drum-Length Pumps, Carbon Steel Models 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 QtyIntake Valve Displacement Pump ServiceBefore You Start Piston ValveModel 215956 Displacement Pump, Series C Displacement Pump PartsModel 215953 Displacement Pump, Series D Liter 55 Gallon Size, Carbon Steel, Leather PackedLiter 55 Gallon Size, Carbon Steel, Polyethylene Packed Model 215954 Displacement Pump, Series DModel 215957 Displacement Pump, Series C 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 Liter 55 Gallon Size, Carbon Steel, Rubber Packed Model 218113 Displacement Pump, Series aModel 218114 Displacement Pump, Series a 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 PackedOpen Tank Mounting Clamp AccessoriesWall Mounting Bracket Carbon Steel. See manual Bung AdaptersAir LIne Filter Ground Wire and ClampBleed-Type Master Air Valve Required 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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