Cooler drive systems have undergone major development in recent decades.
From the electromechanical drive (1950...1970s) with fixed stroke lengths to the hydraulic differential drive (1970s...1980s) with limit switches to the hydraulic proportional drive (since 1990s) with continuous displacement transducers, the possible operating problems (e.g. availability) can be counteracted with different conversion packages.
The conversion to proportional valve technology with GMC (Grate Motion Control) enables a variable and maximum stroke length during operation so that wear is minimized. The grate can also be positioned with millimetre accuracy for maintenance purposes.