Patent ID: 7588106

Claim:
A pontoon crawler track assembly, comprising: box-structured hollow pontoon members, each pontoon member comprising a crawler track arrangement and an internal power transmission arrangement configured to move the crawler track arrangement, a mounting frame comprising a coupling configured to couple the pontoon crawler track assembly with a working machine, the mounting frame further comprising a fastener configured to attach the pontoon members at sides of the mounting frame, actuators configured to adjust a breadth of the crawler track arrangement, and first crawler track parts and second crawler track parts, the second parts being shorter than the first crawler track parts in a transverse direction, and wherein a longitudinal distance between the first crawler track parts is greater than a total length of the mounting frame, wherein the longitudinal distance between the first crawler track parts and a cavity arranged in the internal side wall of the pontoon member, enable withdrawing of the mounting frame partially inside the pontoon member between the first crawler track parts.