That is a Farmi logging winch and skidder.
It is a JL601 IIRC. It has a 16,000# winching capacity. It is designed to winch the logs to the back blade. Then the choker chains drop into the slots at the top of the winch body. When all hooked up, you raise the "lift" and the log butts come off the ground, butting up against the dozer blade. Off you go to the cutting yard.
