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Soft Start Feature

The soft start feature allows the impact rate to build up more slowly, thus preventing the chisel or point from “bouncing” around on the masonry when starting up.

Active Vibration Control

The active vibration control neutralises rebound vibration from the hammer mechanism. Lowering hand and arm vibration, it allows more comfortable use for longer periods of time and extends the life of the unit.

Electronic Impact Energy Control (fig. 1)

The electronic impact energy control (c) offers the following advantages:

•use of smaller accessories without risk of breakage

•minimised break-out when chiselling soft or brittle materials

•optimal tool control for precise chiselling

Electrical Safety

The electric motor has been designed for one voltage only. Always check that the power supply corresponds to the voltage on the rating plate.

Your DEWALT tool is double insulated in accordance with EN 60745; therefore no earth wire is required.

WARNING: 120 V units have to be operated via a fail-safe isolating transformer with an earth screen between the primary and secondary winding.

If the supply cord is damaged, it must be replaced by a specially prepared cord available through the DEWALT service organisation.

Mains Plug Replacement (Middle East and Africa)

If a new mains plug needs to be fitted:

•Safely dispose of the old plug.

•Connect the brown lead to the live terminal in the plug.

•Connect the blue lead to the neutral terminal.

WARNING: No connection is to be made to the earth terminal.

Follow the fitting instructions supplied with good quality plugs. Recommended fuse: 13 A.

Using an Extension Cable

If an extension cable is required, use an approved extension cable suitable for the power input of this tool (see Technical Data). The minimum conductor size is 1 mm2; the maximum length is 30 m.

When using a cable reel, always unwind the cable completely.

ASSEMBLY AND ADJUSTMENTS

WARNING: To reduce the risk of injury, turn unit off and disconnect machine from power source before installing and removing accessories, before adjusting or changing set- ups or when making repairs. Be sure the trigger switch is in the OFF position. An accidental start-up can cause injury.

WARNING: Always wear gloves when changing accessories. The exposed metal parts on the tool and accessory may become extremly hot during operation.

Inserting and Removing SDS Max® Accessories (fig. 3, 4)

This machine uses SDS Max® chisels (refer to the inset in Figure 4 for a cross-section of a chisel shank).

Only DEWALT recommended accessories should be used with this product.

1. Clean the chisel shank.

WARNING: Do not apply lubricant to the machine.

2.Insert the chisel shank into the tool holder/ sleeve (e). Press and turn the chisel slightly until the sleeve snaps into position.

3.Pull on the chisel to check if it is properly locked. The hammering function requires the chisel to be able to move axially several centimetres when locked in the tool holder.

4.To remove a chisel, pull back the tool holder/ sleeve (e) and pull the chisel out of the tool holder.

Indexing the Chisel Position (fig. 5)

The chisel can be indexed and locked into 12 different positions.

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DeWalt D25901 manual Soft Start Feature, Active Vibration Control, Electronic Impact Energy Control fig, Electrical Safety
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D25901 specifications

The DeWalt D25901 is a powerful and versatile demolition hammer designed for professionals who demand performance and reliability in heavy-duty applications. This robust tool is engineered to tackle a variety of challenging tasks such as breaking concrete, chipping, and digging, making it an essential asset for contractors, masons, and construction professionals.

One of the standout features of the DeWalt D25901 is its impressive 9.0 amp motor, which delivers high performance and allows the tool to handle even the most demanding tasks with ease. The hammer provides a maximum impact energy of 12.5 joules, making it one of the most effective demolition hammers available on the market. This powerful performance translates into faster work completion and increased productivity on the job site.

An important technology incorporated into the DeWalt D25901 is its unique active vibration control system. This innovative feature significantly reduces the amount of vibration the user experiences, helping to enhance comfort and reduce fatigue during extended use. This is particularly beneficial for professional users who require a tool that can be used for long periods without causing strain or discomfort.

The DeWalt D25901 also boasts a robust construction, featuring a durable housing that can withstand the rigors of heavy use in tough environments. The tool is designed for easy maintenance, with a grease fitting that enables quick lubrication of critical components for improved durability and extended tool life.

In terms of usability, the D25901 is equipped with a two-position side handle, allowing for better control and comfort during operation. The handle can be adjusted for a range of working angles, ensuring optimal handling in tight spaces. Additionally, the demolition hammer features a convenient depth adjustment rod, enabling precise control when chiseling or breaking materials.

The D25901 uses a standard SDS-Max chuck system, providing compatibility with a wide range of accessories and attachments, making it a flexible choice for various applications. This system also facilitates quick bit changes, enhancing overall workflow on the job site.

In summary, the DeWalt D25901 demolition hammer is a powerhouse tool characterized by its robust performance, advanced vibration control technology, and durable construction. Its user-friendly design and ease of maintenance make it an ideal choice for professionals looking for efficiency and reliability in their demolition projects. Whether it’s for breaking through concrete or performing detailed chipping tasks, the D25901 is engineered to deliver results.
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