General Repair Information

WARNING

INJECTION HAZARD

To reduce the risk of serious injury, whenever you are instructed to relieve pressure, follow the Pressure Relief

Procedure on page 9.

WARNING

HOT SURFACE HAZARD

During operation, the motor and drive housing become very hot and could burn your skin if touched. Flammable materi-

als spilled on the hot, bare motor could cause a fire or explosion

Tool List

These are the tools required to service all parts of the sprayer.

3/16” Allenr wrench: gear housing, legs, handle

3/8” Allenr wrench: pump manifold

#1 Phillipsr screwdriver: junction box, pressure control, front cover

3/8” socket wrench: motor mount

5/8” socket wrench: drain valve, outlet fittings, on/off switch boot, piston

13/16” socket wrench: drain valve

1-1/4” socket wrench: pump inlet valve

1/2” open end wrench: pump rod

11/16” open end wrench: piston jam nut

15/16” open end wrench: flats of inlet tube

1-3/4” open end wrench: pump jam nut

5/64” drive pin: drain valve pin

3” needle nose pliers: wiring, on/off switch

Hammer & punch: packing nut

Torque wrenches: various fasteners

WARNING

MOVING PARTS HAZARD

o reduce the risk of serious injury, includ- ing electric shock, DO NOT touch any

moving parts or electrical parts with your fingers or a tool while inspecting the repair.

Shut off the sprayer and unplug it as soon as you complete the inspection.

Reinstall all covers, gaskets, screws and washers before operating the sprayer.

CAUTION

To reduce the risk of a pressure control malfunc- tion, be sure to properly mate connectors, and never pull on a wire to disconnect it. Pulling on a wire could loosen the connector from the wire.

1.When disconnecting wires in the junction box assembly, use needle nose pliers to separate mat- ing connectors.

2.When reconnecting the wires, be sure the flat blade of the insulated male connector is centered in the wrap–around blade of the female connector.

CAUTION

Improper wire routing can result in poor sprayer performance or damage to the pressure control.

3.Route wires carefully through the drive housing and motor. Avoid pinching the wires between the junction box and the motor or pressure control.

4.Keep all screws, nuts, washers, gaskets, and electrical fittings removed during repair proce- dures. These parts are not normally provided with replacement assemblies.

5.Test your repair before regular operation to be sure the problem is corrected.

6.If the sprayer does not operate properly, verify that everything was done correctly. Also refer to the Troubleshooting Guide, pages 14–18, to help identify other possible problems and solutions.

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Graco Inc 308-548, 390sts, 231-353 manual General Repair Information, Tool List
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390sts, 231-353, 308-548 specifications

Graco Inc. has established itself as a leader in fluid handling equipment, and the Graco 308-548, 231-353, and 390STS models exemplify this commitment to innovation, efficiency, and reliability. These models are designed for high-performance applications in various industries, including automotive, construction, and manufacturing.

The Graco 308-548 is engineered with a powerful motor and advanced pump technology, providing user-friendly operation and outstanding reliability. Its design allows for easy maintenance, minimizing downtime and increasing productivity. The adjustable pressure setting ensures optimal performance for different materials, making it a versatile choice for spray applications. Its lightweight construction and portability enhance usability, allowing operators to move the unit with ease.

On the other hand, the Graco 231-353 model is known for its advanced airless technology, which enables users to achieve a smooth and even finish without the need for thinning. This model is equipped with an efficient pump that delivers consistent material flow, ensuring high-quality results in every application. A notable feature of the 231-353 is its ability to handle a wide range of coatings, including paints, stains, and sealers, making it ideal for both interior and exterior projects.

The Graco 390STS stands out in this lineup with its robust design and powerful performance, suitable for larger scale projects. It incorporates SmartControl technology, which provides precise pressure control and consistent spray patterns, contributing to an efficient work process. The ergonomic design emphasizes operator comfort, reducing fatigue during extended use. Additionally, the 390STS supports a variety of spray tips, allowing for customization based on specific job requirements, further enhancing its versatility.

All three Graco models feature durable construction, capable of withstanding rigorous job site demands. They are built with high-quality materials that resist corrosion and wear, ensuring longevity and reducing the total cost of ownership. The ease of use and intuitive controls minimize the learning curve for new users, making these models accessible to both professionals and DIY enthusiasts alike.

In conclusion, Graco Inc. continues to push the boundaries of fluid handling technology with the 308-548, 231-353, and 390STS models. Their powerful performance, advanced features, and user-friendly designs make them standout choices for anyone in need of reliable spray equipment.
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