D. Main structure of hydraulic breaker

Breaker consists of five main sections such as Cylinder, Piston, Control valve,

Front head, Back head.

1. Four through bolts are holding cylinder, back head and front head together. 2. Cylinder contains piston, control valve and accumulator where Nitrogen gas is charged. 3. Piston strikes the working tool by oil & gas pressures. 4. Control valve is located inside cylinder, regulating piston movement. 5. Tool pins are located inside front head, limiting tool stroke distance. 6. Back head has a chamber where Nitrogen gas is charged.