Pump Service

Disconnecting the Air Motor

WARNING

To reduce the risk of serious injury whenever you

 

115

 

 

are instructed to relieve pressure, always follow the

103

Pressure Relief Procedure on page 8.

 

 

 

 

 

3

1.

Flush the pump.

 

 

 

2.

Relieve the pressure. Remove the pump from its

 

 

 

mounting.

 

 

3.

See Fig. 6. Unscrew the tie rod locknuts (103).

 

 

4.

Unscrew and remove the screw (105) and barrel

105

 

(104).

 

 

5.

Raise the air motor (115) away from the displace-

 

 

 

ment pump (114). Unscrew the displacement rod

 

 

 

(15) from the air motor connecting rod (S).

 

 

6.

To order pump parts, refer to the parts lists on

 

 

 

pages 12–16. Refer to pages 17–34 for displace-

 

 

ment pump service and parts information. Refer to

106

manual 307456 for air motor service and parts in-

2

formation.

 

Reconnecting the Air Motor

1.When reconnecting the air motor, use lithium base grease on the threads of the displacement rod

(15). Make sure the o-ring (14) is in place on the rod.

2.Insert the muffler (T) into the air motor connecting rod (S) as shown in Fig. 6.

3.Tighten the displacement rod (15) into the air mo- tor connecting rod hand tight, and install the barrel and screw set (104 and 105).

4.Apply thread sealant to the threads of the tie rods (106). To ensure proper alignment, first thread the tie rod locknuts (106) loosely onto the tie rods, then torque evenly to 15 NSm (8 ft–lb).

NOTE: Removing the muffler (T) will increase both

Fig. 6

pump flow rate and exhaust noise.

 

5.Reconnect the groundwire if it was disconnected during service.

S

104

T

14

15 1

114

1Grease the threads.

2Apply thread sealant. Torque evenly to

315 NSm (8 ft–lb).

03766B

307427 11

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Graco 03761B dimensions Pump Service, Disconnecting the Air Motor, Reconnecting the Air Motor, Pressure Relief Procedure on
Page 10 Page 12

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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