Pipelayer with quick attach counterweights

A pipelayer machine comprising:

• a main body having a first side and a second side;
• a first side track provided on the first side of the main body;
• a second side track provided on the second side of the main body;
• a side boom provided on the first side of the main body;
• a counterweight assembly provided on the second side of the main body, the counterweight assembly comprising:
• a counterweight mounting frame having a circular engagement mount;
• a frame body extending below the engagement mount and at least one lug flange extending below the frame body and having an aperture passing therethrough;
• at least one fixed member connected at a first end of the at least one fixed member to the second side of the at least one fixed member of the main body;
• at least one frame member pivotally connected at a first end of the at least one frame member to a second end of the at least one fixed member and a second end of the at least one frame member connected to the counterweight mounting frame;
• at least one support member pivotally connected at a first end of the at least one support member inside the second side track and a second end of the at least one support member connected to the at least one frame member;
• and
• an actuator connected between the second side of the main body and the at least one support member;
• at least one counterweight comprising:
• a body with a first side having a side profile corresponding to the counterweight mounting frame;
• an engagement hook on the side profile of the first side of the body, the engagement hook configured to engage with the engagement mount of the counterweight mounting frame engageable with the counterweight mounting frame;
• and
• at least one protruding lug extending from the first side of body of the counterweight and having an aperture passing therethrough, the at least one protruding lug positioned to correspond with the at least one lug flange on the counterweight mounting frame so that the aperture in the at least one protruding lug aligns with the aperture in the at least one lug flange.