Repair

Repair

Follow Pressure Relief Procedure, page 7.

See Parts, page 14, for callout references.

Disassembly

1.Unscrew retaining ring (14) to remove air cap (13b). Check o-rings (13a and 13c) and replace if necessary.

2.Trigger gun while unscrewing nozzle (11) to prevent needle damage.

3.Check o-ring (19) and replace if necessary.

4.Remove fluid control valve (8), spring (26), needle (9), and nut (7). Inspect. Replace tip (9c), needle (9), and u-cup seal (20) as necessary. If replacing needle tip, use low strength thread adhesive on needle tip threads.

5.Remove spring (28) and push the air valve assembly (6) out the back of the gun. Inspect. Replace air valve assembly (6) and u-cup seal (20) as necessary. Use tool (33) to install u-cup seal.

6.Remove trigger nut (22), trigger pin (21), wave washer (18), and trigger (10).

7.Unscrew needle packing nut (17) and remove u-cup packing (16) and spreader (15).

8.Remove air control valve assembly (5). Inspect and replace as necessary.

9.Remove air inlet valve assembly (27). Inspect and replace as necessary.

Do not remove the fluid inlet fitting. It was

attached to the gun body with permanent thread locker. There is also no need to remove the air inlet fitting.

12

312578H

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Graco Inc 312578H important safety instructions Repair, Disassembly, Follow Pressure Relief Procedure
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312578H specifications

Graco Inc. 312578H is a versatile and reliable component engineered for the fluid handling industry. Graco, a recognized leader in manufacturing equipment and systems for the precise spraying and transferring of fluids, has incorporated cutting-edge technology into this product, ensuring it meets the high standards of performance and efficiency that customers expect.

One of the main features of the 312578H is its robust construction that is designed to withstand demanding working environments. The unit is made with high-quality materials that resist wear and tear, ensuring a longer service life and reduced maintenance costs. This durability is crucial for professionals who rely on consistent performance in their day-to-day operations.

The 312578H is equipped with advanced technology such as the ProConnect system, which allows for quick and easy component replacement. This feature minimizes downtime and enhances productivity, allowing users to get back to their tasks swiftly. Additionally, the unit is designed for easy integration with other Graco products, enabling a seamless workflow in multi-component setups.

Another significant characteristic of the 312578H is its adaptability. It can handle a wide range of fluids, from thin solvents to thicker coatings, making it suitable for various applications across industries such as automotive, construction, and industrial manufacturing. Its versatility is complemented by precise flow control technology, ensuring optimal performance regardless of the fluid density or viscosity.

Ergonomics are also a key consideration in the design of the 312578H, with user-friendly controls that enhance operability. This focus on usability helps reduce user fatigue and increases efficiency on the job site, leading to improved overall productivity.

In summary, Graco Inc. 312578H showcases a combination of durability, advanced technologies, and user-centric design. This makes it an essential tool for professionals in the fluid handling sector. With its robust construction, ease of maintenance, wide fluid compatibility, and ergonomic controls, the Graco Inc. 312578H stands out as a strong contender for those seeking reliable and efficient fluid handling solutions.
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