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1.1-supply mainline inlet; 1.2-trailer supply main outlet (to the red coupling head); 2.2-outlet to trailer con-
trol mainline (to the yellow coupling head); 4.1-inlet from the front circuit of the truck-tractor service
brake system; 4.2-inlet from the rear circuit of the truck-tractor service brake system; 4.3-inlet from the
rear circuit of the truck-tractor parking brake system
Fig.90 - Trailer Brake Control Valve with Double-line Drive and Cut-off Valve
1-upper chamber; 2-piston; 3-inlet valve; 4-spring; 5-valve body; 6-outlet valve; I, II, III, VI-outlets
Fig.91 - Acceleration Valve
