Drive for heavy devices

The drive has a drive motor (1) i.e. diesel engine, drivingly connected with a heavy device (9) by a coupling (14) and a belt drive (6) i.e. V-belt drive, and formed to drive an auxiliary device (19) i.e. hydraulic pump. A drive shaft of the drive motor is detachably connected with an output shaft by the coupling, and is permanently engaged with an input of a power driver (10). The power driver has an auxiliary drive for mounting the auxiliary device. A closed hydraulic coupling (11) is arranged between the output shaft and a primary belt pulley (5) of the belt drive.