Power chain saw having a chain fluid pump

摘要

A chain medium pump (20) for a motor chain saw (10) is made disconnectable in a simple manner, the chain medium pump (20) sucking the chain medium over a suction pipe (29) from a tank (22) and delivering it over a pressure pipe (27) to a sawing device (12) of the motor chain saw (10), by the fact that, for disconnecting the supply of the sawing device (12) with the chain medium, there exist controllable means (23-26) with which the pressure pipe (27) is interrupted, the chain medium pump (20) being running, and simultaneously the chain medium delivered by the chain medium pump (20) can be returned into the suction pipe (29).