Graco Inc 390sts, 308-548, 231-353 manual Test the brushes

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Motor Brushes

9.Test the brushes.

a.Remove the pump connecting rod pin (17). See Fig. 18, page 22.

b.With the sprayer OFF, turn the pressure con- trol knob fully counterclockwise to minimum pressure. Plug in the sprayer.

c.Turn the sprayer ON. Slowly increase the pressure until the motor is at full speed.

d.Inspect the brush and commutator contact area for excessive arcing. Arcs should not trail or circle around the commutator surface.

WARNING

MOVING PARTS HAZARD

Do not touch the brushes, leads, springs or brush holders while the sprayer is plugged in to reduce the risk of electric

shock and serious injury.

10.Install the brush inspection covers and gaskets.

11.Break in the brushes. Operate the sprayer for at least one hour with no load. Install the pump connecting rod pin. See Fig. 18, page 22.

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Contents Model 231-353, Series a Rev. D Supercedes Rev. CSymbols Table of ContentsInjection Hazard Equipment Misuse Hazard Major Components Setup How to use the pressure drain valve How to Use the Gun Trigger SafetyHow to use the pressure control OperationHow to remove a tip clog How to use the RAC IV tip guardPressure Relief Procedure Startup ProcedureStartup Fire and Explosion Hazard 102 Shutdown and Care Shutdown and CareWhen to Flush How to FlushFlushing Basic Problem Solving TroubleshootingIntermediate Problem Solving If pump consistently comes to rest with Use AC power or a different generator Setup Motor TestArmature Short Circuit Test Tool List General Repair InformationMotor Brushes Test the brushes Removing the pump See Fig Displacement Pump RepairIntake valve repair See Fig Disassembling the pump See FigReassembling the pump 110 108 107 116 Motor Power Supply Cord On/Off SwitchMotor Start Board Drive Housing, Connecting Rod, Crankshaft REF a Pressure Control Pressure Transducer Drain Valve Inlet Strainer Installation/RemovalAccessories Displacement Pump Parts Drawing and ListModel 236-787, Series a Fluid Filter Kit Low Profile Cart KitModel 231-353, Series a Sprayer Parts DrawingMotor KIT Sprayer Parts ListDimensions Technical DataGraco Warranty and Disclaimers Graco Phone Numbers

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.