Main function

The pair of carbon brushes for Scheppach demolition hammers – Ref. 3908204028 is designed to transmit electrical current between the stationary part of the motor and its rotating commutator.

The carbon brushes, also known as motor brushes, remain in contact with the commutator to provide the electrical power required for the motor to operate.

As they are subject to constant friction, they gradually wear down with use. Carbon brushes in good condition help ensure smooth motor operation, efficient current transmission and optimal demolition hammer performance.

Carbon brushes should generally be replaced as a pair to ensure even wear and consistent contact.

When should the carbon brushes be replaced?

The pair of carbon brushes for Scheppach demolition hammers – Ref. 3908204028 may need to be replaced in the following cases:

• Carbon brushes are severely worn or have become too short
• Motor operates intermittently
• Difficulty starting the motor
• Loss of power during use
• Machine stops unexpectedly
• Excessive sparking at the commutator
• Unusual noises or irregular motor operation
• Carbon brushes are broken, cracked or damaged

It is recommended to replace both carbon brushes at the same time, even if one appears less worn than the other, to maintain consistent contact with the commutator.

When replacing the brushes, it is also advisable to check the condition of the motor commutator, as a heavily worn or damaged commutator can cause rapid wear of the new carbon brushes.

This pair of carbon brushes for Scheppach demolition hammers is suitable for the following models:

• Scheppach AB1900
• Scheppach AB1900 SE
• Scheppach MPP1900