PRONAR T743, Operator'S Manual

Page: 65 / 150

Pronar T743 SECTION 3
3.18
FIGURE 3.14 Diagram of brake system with ALB automatic regulator
(1) supply conduit connection with a filter (red), (2) control conduit connection with a filter
(yellow), (3) loosening-parking valve, (4) brake valve, (5) regulator ALB, (6) air tank,
(7) diaphragm actuator, (8) diaphragm-spring actuator, (9) relay valve (10) two-way valve,
(11) drain valve
Brake pneumatic cylinders applied in the systems are mounted on specially prepared
brackets welded to the axle. These are diaphragm actuators and diaphragm-spring actuators.
Air supplied to cylinder exerts pressure on membrane which in turn moves cylinder piston
and rotates to axle expander lever. Return of cylinder to neutral position is assisted by draw
back springs.
Three-step brake force regulator - figure (3.15), applied in pneumatic systems adjusts braking
force depending on setting. Switching to a suitable working mode is done manually by
machine operator with the aid of the lever (2) prior to moving off. Three working positions are
available: A - "no load”, B - "half load” and C - "full load”.