PRONAR 663/4 SILO, Operator'S Manual, Page: 74 / 135

Pronar T663/4 T663/4 SILO SECTION 4
4.8
Unhitching the trailer
In order to unhitch the trailer from the tractor follow these steps.
Immobilise tractor and trailer with parking brake.
Place chocks under trailer wheel.
Wheel chocks must be so placed that one is in front of the wheel and
the second is behind the wheel - see section 2.
Controlling the support, set the drawbar eye at such a height that one may
safely unlock and unhitch the trailer.
Reduce residual pressure in the support system.
Turn off tractor engine. Ensure that unauthorised persons do not have access
to the tractor cab.
Disconnect all hydraulic tipping system conduits from tractor.
Disconnect electric lead.
Disconnect pneumatic system conduits (applies to double conduit pneumatic
system).
Disconnect pneumatic conduit marked red.
Disconnect pneumatic conduit marked yellow.
DANGER
Exercise caution when disconnecting trailer from the tractor. Ensure good visibility.
Unless it is necessary, do not go between tractor and trailer.
Before disconnecting conduits and drawbar eye, close tractor cab and secure it against
access by unauthorised persons. Turn off tractor engine.
Disconnect pneumatic system conduits (applies to single conduit systems):
Disconnect pneumatic conduit marked black.
Disconnect hydraulic braking system conduits (applies to trailer version with
hydraulic braking system).
Disconnect the conduit of the support hydraulic system.
Protect conduit ends with covers. Place conduit plugs in appropriate sockets.