Actuator assembly for a heavy construction machine

An actuator assembly for a heavy construction machine, the actuator assembly comprising:

• a main cylinder assembly having a main cylinder and a main cylinder piston slidably disposed within the main cylinder;
• and
• a plunger cylinder assembly disposed parallel to the main cylinder assembly, wherein the plunger cylinder assembly includes a plunger cylinder and a plunger cylinder piston slidably disposed within the plunger cylinder,
• wherein
• the main cylinder assembly is a double acting cylinder assembly in which the main cylinder defines a first chamber and a second chamber in which the main cylinder piston separates the first chamber from the second chamber;
• the plunger cylinder assembly is a single acting cylinder assembly in which the plunger cylinder defines a third chamber therein, wherein the plunger cylinder assembly includes:
• a plunger cylinder cap end cover connected to one end of the plunger cylinder;
• a plunger cylinder head end cover removably connected to another end of the plunger cylinder;
• and
• a plunger cylinder piston rod, wherein one end of the plunger cylinder piston rod is connected to the plunger cylinder piston and another end of the plunger cylinder piston rod defines a ball-socket joint connected to a main cylinder rod eye of the main cylinder assembly;
• and
• each of the first, second and third chambers are selectively provided in fluid communication with one of a high pressure (HP) hydraulic line, a medium pressure (MP) hydraulic line and a low pressure hydraulic line (LP) based on load requirement of the actuator assembly.