The Atlas Copco 5615978 is a genuine hydraulic accumulator designed for use in various Atlas Copco HB series hydraulic breakers. This critical component stores hydraulic energy, dampens pressure pulsations, and absorbs shocks within the hydraulic system, contributing to stable operation and extended equipment life. It features a volume of 0.75 L, a maximum operating pressure of 250 bar, weighs 1.5 kg, and has dimensions of 200 mm length and 90 mm diameter.