The mechanism of this side-dumping car consists of body 2 and truck 3 connected together by two six-bar linkages, ABCDEF and AGHKLMN. Link NM is designed as a latch on its free end (see left-hand drawing). When jack 1 is operated, body 3 is lifted to the dumping position shown in the right-hand drawing. At this, six-bar linkage AGHKLMN opens the latch on link NM and raises link GH. Linkage ABCDEF swings open side BC and the load can be dumped at some distance from the car (see right-hand drawing).
$830$LW,MH$