150
- unplug the semitrailer power cable from the socket;
- disconnect the coupling heads of the brakes air drive (first – feeding line, then – control
line) and close them by protective covers. Fix the coupling heads together with hoses on the truck
tractor platform;
- shift self-release safety lock 2 in the upper/lower position (depending of the bolster
brand) and pull the releasing lever until it is fixed; the locking bar 10 moves aside opening the
locking hook 9;
- engage the first gear in the gearbox and drive the truck tractor slowly forward until it is
unhitched fully from the semitrailer;
- locking hook 9 remains open with the help of spring 5.
