BRAKE ACCUMULATOR

770 206 39B BRAKE ACCUMULATOR A key part of the rig's braking system, this accumulator acts as a hydraulic energy reserve for both the service and parking brake circuits. It uses a nitrogen pre-charge, separated from the hydraulic fluid by an internal bladder, to store pressure. This ensures that instant force is available to apply the brakes, providing responsive control and smoothing out pressure spikes from the main pump.

Proper accumulator function is essential for machine safety. In the event of a sudden engine stall or hydraulic pump failure, the stored pressure is what allows the operator to bring the heavy machine to a controlled stop. A healthy accumulator also reduces wear on the hydraulic pump by absorbing pressure fluctuations, contributing to the overall reliability of the entire brake system.

A common sign of a failing accumulator is a 'spongy' or slow-to-respond brake pedal, or a brake pressure warning light that comes on frequently. Before replacing, always follow the service manual to safely depressurize the brake circuit. Regular checks of the nitrogen pre-charge level are the best way to ensure it remains operational.