Maintenance and

FIG. 38

 

Lubrication

 

 

Service

 

 

! WARNING NO USER SERVICEABLE PARTS

 

 

INSIDE. Preventive maintenance

 

 

performed by unauthorized personnel may result in

 

 

misplacing of internal wires and components which

 

 

could cause serious hazard. We recommend that all tool

 

 

service be performed by a Bosch Factory Service Center or

 

 

Authorized Bosch Service Station. SERVICEMEN:

 

 

Disconnect tool and/or charger from power source before

 

 

servicing.

 

 

Batteries

 

 

Be alert for battery packs that are nearing their end of

 

 

life. Battery packs typically last from 500 to 1000 charges.

 

1

If you notice decreased tool performance or significantly

2

 

shorter running time between charges then it is time to replace the battery pack. Failure to do so can cause the tool to operate improperly or damage the charger.

Long term battery storage should be in the discharged state. Battery packs last longer and re-charge better when they are stored discharged. Remember to fully re-charge battery packs before using after prolonged storage.

Carbon Brushes

The brushes and commutator in your tool have been engineered for many hours of dependable service. To maintain peak efficiency of the motor, we recommend every two to six months the brushes be examined. Only genuine Bosch replacement brushes specially designed for your tool should be used.

Motor Brush Replacement

To Inspect or Replace Brushes:

1.Disconnect battery pack from tool.

!The brush cap is spring loaded by the CAUTION brush assembly.

2.Remove the brush cap on the motor using a wide flat blade screwdriver.

3.Pull out the brush 1 (Figure 38). Repeat for the opposite side.

NOTE: If installing the existing brush or brushes, make sure the brush goes in the same way it came out. Otherwise a break-in period will occur that will reduce motor performance and increase brush wear.

4.Install new brush. The two (2) tabs on the brush terminal 2 go in the same hole the carbon part fits into.

5.Tighten the brush cap but do not overtighten.

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Bosch Power Tools 3918, 3924-24 manual Batteries, Carbon Brushes, Motor Brush Replacement
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3924-24, 3918 specifications

Bosch Power Tools has long been a leader in innovation and quality within the power tool industry, and its models 3918 and 3924-24 are prime examples of their commitment to performance and reliability. These tools are designed for both professionals and DIY enthusiasts, providing efficient solutions for a variety of tasks.

The Bosch 3918 is primarily a reciprocating saw that features a robust 6.5-amp motor, delivering impressive power for cutting through wood, metal, and other materials. One of its standout features is the tool-less blade change system, which allows users to switch blades quickly and easily without needing additional tools. This is not only time-saving but also enhances the user experience by minimizing downtime between cuts.

The saw also boasts a variable speed dial that can reach up to 2,700 strokes per minute, giving users optimal control over their cutting tasks. The pivoting shoe provides increased stability and allows for precise cuts in various applications. Additionally, the saw includes an electronic motor protection system, which helps prevent overheating and extends the lifespan of the tool.

On the other hand, the Bosch 3924-24 is a powerful angle grinder. With a 6.0-amp motor, it delivers high performance while being compact and lightweight. The grinder comes with a soft grip handle, making it comfortable for extended use. Its one-touch guard allows users to adjust the guard without any tools, thus enhancing convenience during operations.

This model is equipped with a direct-drive motor that increases torque and ensures that it works efficiently under load. The 3924-24's efficient dust management system minimizes dust and debris, providing a cleaner workspace and improving visibility during operations. Additionally, the grinder features a two-position side handle for added control and stability, making it suitable for a variety of grinding, cutting, and polishing applications.

Both Bosch Power Tools models, 3918 and 3924-24, exemplify the brand's commitment to quality, safety, and user ergonomics. Their advanced features, robust construction, and innovative technologies make them indispensable tools for any serious craftsman or home improvement enthusiast. Bosch continues to enhance its tools with practical features that reflect the needs of its users, ensuring that professionals get the results they demand while maintaining ease of use.
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