Irrigation machine

An irrigation machine with a hose reel rotatably mounted on a wheeled frame for a withdrawable and rewindable hose whose one end fixed to the hose reel is connectable via a coupling to a water supply source, and whose other end is connected to a sprinkler gun on a gun carriage or a sled, the hose reel for the hose, which is compression resistant and consists of rigid hose material, being coupled to a drive motor designed as a water turbine, which drive motor is coupled into a conduit system from the water supply source to the gun, and the hose reel being journalled with its axis of rotation substantially horizontal, wherein said water turbine is coupled into said conduit system via a flow-divider in the form of a three-way valve with one inlet and two outlets, said water turbine being coupled in between the two outlets, said flow-divider having a main channel leading from the water supply source to the hose, in which channel there is provided a throttle point, wherein the water turbine is coupled into a branch conduit whose ends are connected to the main channel on either side of the throttle point, said throttle point being adjustable, and a regulator valve disposed in a by-pass conduit whose ends are connected to the main channel on either side of the throttle point.