PRONAR T286, Operator'S Manual

Page: 53 / 168

SECTION 3 Pronar T286
3.13
FIGURE 3.9 Control valve and braking force regulator
(1) control valve, (2) braking force regulator, (3) trailer parking brake release button, (4) work
selection regulator lever, (A) position "NO LOAD”, (B) position "HALF LOAD”, (C) position
"FULL LOAD”
3.2.5
BRAKING SYSTEM - AIR SUSPENSION
The hook trailer with air suspension system is equipped with pneumatic braking system with
automatic braking force regulator ALB (6) - figure (3.10). Proper operation of the braking
system is possible only when two pneumatic connections (red supply connection and yellow
control connection) are connected.
The system is equipped with parking brake for immobilising trailer while standing motionless.
The parking brake is activated by loosening-parking valve (4) – figure (3.10). The valve is
equipped with the emergency brake function which is activated in the event of pressure drop
in the supply conduit (as a result of conduit disconnection or damage). Two push-buttons
located in this valve make it possible to set the machine to an appropriate working mode.
Black push-button controls the manoeuvre valve. It is designed for engaging or releasing the
brake if the trailer is unhitched from the tractor. The black push-button can not be depressed
when pneumatic conduits are connected. In the depressed position, the spring (parking)
brake is released. Red push-button controls operation of the parking valve when the trailer is
hitched to tractor. If the push-button is released, the parking (spring) brake is engaged.