PRONAR RC2100, Translation Of The Original Copy Of The Manual

Page: 51 / 125

SECTION 3 Pronar RC2100
3.9
Brake cylinders used in the systems are mounted on specially designed brackets welded to
the wheel axles. They are membrane cylinders. 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. Relay valve (4) is designed for
increasing the speed of air transmission to cylinders during braking. Automatic brake force
regulator (3) adapts braking pressure to the trailer load. During normal work it does not
require service.
Connections of pneumatic conduits are marked with coloured safety covers, which enable
identification of individual conduits:
•
red – supply connection,
•
yellow - control connection.
Each pneumatic connection is equipped with a cut-off valve, which automatically cuts off
outflow of air from pneumatic conduit in the event of disconnection from agricultural tractor
socket.
3.2.5 PARKING BRAKE
FIG. 3.7 Parking brake
(1) crank mechanism, (2) equalising bar, (3) cable, (4) wheel axle