Air Motor and Throat Service

Reassembly

1.Clean all the parts carefully in a compatible solvent, and inspect for wear or damage. Use all the repair kit parts during reassembly, and replace other parts as necessary.

2.Check the polished surfaces of the piston (2), dis- placement rod (8), and cylinder (17) wall for scratches or wear. A scored rod causes premature throat seal wear and leaking.

3.Lubricate all parts with a light, water–resistant grease.

4.Install the new throat seal (6), lips facing down. Screw the packing nut (38) into the base (5).

5.Slide the displacement rod (8) down through the throat, and lower the piston (2) into the base (5). Be sure the o–rings (9, 10, and 24) are in place. See Fig. 4.

6.Pull the exhaust valve poppets (16) into the valve actuator (13), and clip off the top part shown with dotted lines in Fig. 5.

7.Install the air intake grommets (12), and reassemble the valve mechanism. Before you install the lock- wires (31) in the adjusting nuts (30), use the special gauge, 15E796, to adjust the transfer valve so there is 0.105 + .010 in. clearance between the poppets

(1) and the seat when it is open. See Fig. 5. Snap the toggles (25) to the up position. This is essential for reliable air motor performance.

8.Reassemble the air motor, and assemble to the dis- placement pump. Torque the extension tube (64) to to base (5) at 45 to 55 ft-lb (61 to 75 N•m). Before you install the air motor plate, tighten the throat packing nut (38) snugly; do not overtighten it.

9.Before you remount the pump, connect an air hose, and run the pump slowly, at about 40 psi (276 kPa, 2.8 bar), to ensure that it operates smoothly.

10.Reconnect the ground wire before regular operation of the pump.

L2

26 27 25 11 22

31

1

M

30

1

12

30

113

13

14

16

30

12

30

24

0.105 in.

(2.7 mm)

1 Turn wires up.

2

04118

1

04119 2

Cutaway View

2 Push toggles (L) in and then up.

3 Cut off tops of poppets as indicated by dotted lines

FIG. 6

309966H

13

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Graco 246781 Series C, 253361 Series C, 246780 Series C, 246909 Series C warranty Reassembly, Cutaway View
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246909 Series C, 246780 Series C, 246781 Series C, 253361 Series C specifications

Graco, a renowned name in the field of fluid management and equipment manufacturing, offers a wide range of products designed for various applications. Among their impressive lineup, the Graco 253361 Series C, 246781 Series C, 246780 Series C, and 246909 Series C stand out for their advanced features and reliable performance. These models cater to professionals across multiple industries, including painting, coating, and spraying tasks.

The Graco 253361 Series C is engineered for durability and efficiency, suitable for heavy-duty use. One of its standout features is its high-pressure paint delivery system, allowing users to achieve a smooth and even finish. This model comes equipped with a powerful motor that ensures consistent pressure, improving spray quality and reducing overspray. Additionally, its compact design enhances portability, making it ideal for both interior and exterior jobs.

Moving on to the Graco 246781 Series C, this model is recognized for its versatility. It supports a wide range of coatings, from water-based to solvent-based paints. The easy-to-use control system allows for precise adjustments, catering to various spray patterns and techniques. Its robust construction guarantees longevity, making it a reliable choice for professionals who demand uninterrupted workflow.

The Graco 246780 Series C offers a unique combination of power and portability. Engineered for smaller jobs, this model packs a punch with its efficient motor that generates high pressure for meticulous applications. It features a user-friendly interface that simplifies operation, ensuring that even novice users can achieve professional results. Its lightweight design makes it easy to maneuver, while the integrated storage keeps your tools organized.

Finally, the Graco 246909 Series C is an exceptional choice for those seeking a high-performance sprayer for larger projects. With advanced pressure control technology, this model minimizes material waste while maximizing productivity. Its built-in filtration system protects the pump from dirt and debris, extending the lifespan of the equipment. Additionally, the ergonomic design ensures comfort during extended use, catering to the needs of professionals demanding both performance and ease.

In conclusion, the Graco 253361 Series C, 246781 Series C, 246780 Series C, and 246909 Series C models exemplify innovation in fluid handling technology. Each model is designed to meet the specific needs of various applications, ensuring that users achieve optimal results with efficiency and effectiveness. Graco continues to set the standard in the spray equipment industry, enhancing productivity and quality across projects.
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