BRAKE PISTON

In Stock

This is a genuine Brake Piston, part number 8440 3061 31, for rock drill rotation units. It is the core component that applies hydraulic pressure to engage the brake, ensuring the drill string is held securely during non-rotation phases like rod handling.

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Description

Full Technical Description

BRAKE PISTON 8440 3061 31 Located within the brake assembly of the drifter's rotation unit, this piston converts hydraulic pressure into mechanical force. When activated, it moves to press the brake discs together, effectively locking the rotation chuck in place. This function is essential for safely and efficiently adding or removing drill rods, as it prevents unwanted movement of the drill string.

A worn or damaged brake piston can lead to significant operational problems and safety risks. If it fails to hold pressure due to leaking seals, the rotation chuck can drift during rod changes, making it difficult and unsafe to handle the drill string. A piston that sticks in its bore can also cause the brake to drag, leading to overheating and premature wear on other brake components.

Common signs of a failing piston include a spongy feel in the brake control, visible hydraulic fluid leaks around the brake housing, or the brake's inability to hold the chuck steady under load. When replacing the piston, it is critical to also install new seals and to work in a clean area to avoid contaminating the hydraulic system.