PRONAR PT512 Operator's Manual page 75

CHAPTER 4
the tractor and only then connect the red connector to the red socket of the tractor. Once the
2nd line is connected, the brake releasing system will switch to normal mode of operation
(disconnection or breaking of the pneumatic lines causes the trailer's control valve to
automatically apply brakes). The lines are marked with colored protective caps which identify
the appropriate system line.
ATTENTION
Pay attention to the compatibility of oil in the tractor's hydraulic systems and the trailer's
tipping system.
When connecting the hydraulic braking system lines, remember to connect the hydraulic line
first. Then connect the electrical cable of the electro-hydraulic brake valve. After connecting
this cable and starting the engine (applying the voltage to the connector cable), the braking
system will be ready for operation. In case no voltage is applied to the connector cable, the
trailer will be immobilized by means of the brake.
ATTENTION
The trailer can only be hitched to a tractor which has the appropriate hitch and connection
sockets for braking, hydraulic, as well as electrical systems and if hydraulic oil in both
machines can be mixed.
When hitching is completed, secure the electrical cables and hydraulic and braking
system lines so that they do not become entangled in tractor's moving parts when driving
and do not become broken or cut when making turns.
Disconnecting the trailer
In order to disconnect the trailer from the tractor, perform the actions below in the sequence
presented.
Immobilize the tractor and the trailer with the parking brake.
By controlling the valve, adjust the drawbar eye height so that it is possible to
disconnect the trailer.
Lower the support.
4.7
Pronar PT512