Abstract: A side saw assembly for a tree processing apparatus. The side saw assembly is rotatably and pivotally attached to a mounting platform on a trailer such that the side saw assembly is selectively movable between a transport position, resting on top of the trailer, and ground positions, resting on the ground adjacent either side of the trailer. A connecting arm is pivotally attached at one end to a swivel mount, which is affixed to a side saw assembly. At its other end, the connecting arm is pivotally attached to a swivel mount affixed to the mounting platform. A lift handle is attached to the side saw assembly such that it may be grasped by the grapple of a knuckle boom loader to move the side saw assembly from the transport position to the ground position on one side of the trailer or the other.