Patent ID: 7658293

Claim:
A counterweight installation device, comprising: a weight support unit provided on a rear end of a body frame of a construction machine; a weight mounting unit disposed on a counterweight; a pin member for mounting the counterweight adapted to move between a first position at which the weight mounting unit is mounted on the weight support unit and a second position at which the weight mounting unit is dismounted from the weight support unit; and a rod device, one end of which is linked with the pin member and an other end of which extends so as to project to an outside of the counterweight, adapted to move the pin member between the first position and the second position by operation at the other end thereof, a hydraulic cylinder swingably supported on the counterweight to move between one of a forward and a rearward position to engage the weight support unit to raise the weight mounting unit and the other of the forward position and the rearward position to disengage from the weight support unit, and a handle for moving the hydraulic cylinder between the forward and rearward positions provided at a rear side of the hydraulic cylinder, and a recess at an upper surface of the counterweight on a rear side of the hydraulic cylinder that provides access from behind the counter to the handle to move the hydraulic cylinder between the forward and rearward positions.