Cylinder: This contains the moving piston which strikes the tool. The seals for both ends of the piston are also located in the cylinder. The seals for the upper end of the piston are located in a removable seal retainer while the seals for the lower end of the piston are located in proves machined directly into the cylinder.
Piston: The piston transfers impact power to the tool, generated by hydraulic power.
Front head assembly: This retains the tool, using the tool pins. By removing these pins, the tool can be changed.
Ring Bush: This guides the tool, Ring Bush limits the uppermost position of the tool. It is consumable parts, which should be checked for wear limits. If needed, they should be replaced.
Back head assembly: This contains the cushion chamber charged with N2 gas that is compressed during upward strokes of the piston, and serves to provide maximum absorption of the piston recoil, efficiently storing this energy for the next blow.
Through bolts: These are used to assemble the front head, the cylinder, and the back head. They have to be constantly tightened to the specified torque. Inspect the bolts for loosening, and re-tighten them weekly.