Graco Inc 231-353, 390sts, 308-548 manual Motor Brushes

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Motor Brushes

NOTE: Replace brushes when worn to about 0.5 in. (12.5 mm). Always check both brushes. Brush Repair Kit 236–967, which includes spring clip 112–766, is available for motors manufactured by Pacific Scientific.

NOTE: Replacement brushes may last only half as long as the original ones. To maximize brush life, break in new brushes by operating the sprayer for at least one hour with no load (remove the pump connecting rod pin).

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.

1.Remove both inspection covers (A) and their gas- kets. See Fig 14.

￿Motor lead; do not disconnect

2 Minimum 0.5” (12.5 mm)

 

 

 

3

Included in Brush Repair

 

 

 

 

Kit 236–967

G

H

2

 

 

C

 

￿

3 F

B

E

Fig. 15

D

￿388￿

 

 

 

 

4.Inspect the commutator for excessive pitting, burn- ing or gouging. A black color on the commutator is normal. Have the commutator resurfaced by a qualified motor repair shop if the brushes seem to wear too fast or arc excessively. See Step 9.d., also.

5.Repeat for the other side.

NOTE: The motor brushes on the other side are upside down.

6.Place a new brush (C) in the holder (B) so the ramp (H) faces the spring. See Fig. 16.

A

F

￿

G

Fig. 14

￿4653

Fig. 16

C

E ￿388￿

2.Push in the spring clip (F) and release its hook (G) from the brush holder (B). Pull out the spring clip. See Fig 15.

3.Slide off the brush lead terminal (E) off the blade connector. Remove the old brush (C). See Fig 15.

7.Holding the spring clip (F) at a slight angle, slide the spring clip into the brush holder and hook it over the end of the holder. See Fig. 16. Pull on the spring clip to be sure it stays in place. Connect the brush lead to the blade connector (E).

8.Repeat for the other side.

 

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Contents Rev. D Supercedes Rev. C Model 231-353, Series aTable of Contents SymbolsInjection Hazard Equipment Misuse Hazard Major Components Setup How to Use the Gun Trigger Safety How to use the pressure drain valveHow to use the pressure control OperationHow to use the RAC IV tip guard How to remove a tip clogStartup Pressure Relief ProcedureStartup Procedure Fire and Explosion Hazard 102 Shutdown and Care Shutdown and CareFlushing When to FlushHow to Flush Troubleshooting Basic Problem SolvingIntermediate Problem Solving If pump consistently comes to rest with Use AC power or a different generator Armature Short Circuit Test SetupMotor Test General Repair Information Tool ListMotor Brushes Test the brushes Displacement Pump Repair Removing the pump See FigReassembling the pump Intake valve repair See FigDisassembling the pump See Fig 110 108 107 116 Motor Motor Start Board Power Supply CordOn/Off Switch Drive Housing, Connecting Rod, Crankshaft REF a Pressure Control Pressure Transducer Inlet Strainer Installation/Removal Drain ValveDisplacement Pump Parts Drawing and List AccessoriesModel 236-787, Series a Fluid Filter Kit Low Profile Cart KitSprayer Parts Drawing Model 231-353, Series aSprayer Parts List Motor KITTechnical Data DimensionsGraco 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.
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