PRONAR T669/1, Operator'S Manual, Page: 73 / 137

SECTION 4 Pronar T669/1
4.7
Connect hydraulic turning interlock system lines (applies to trailer version with
hydraulic turning interlock system).
Connect the main wiring to power the electric lighting.
DANGER
When hitching, there must be nobody between the trailer and the tractor. When hitching
the machine, tractor driver must exercise particular caution and make sure that nobody is
present in the hazard zone.
When connecting the hydraulic lines to the tractor, make sure that the tractor hydraulic
system and trailer are not under pressure.
Ensure sufficient visibility during hitching.
During connection of braking system lines (pneumatic double line) the correct sequence of
line connection is very important. First connect the yellow connector to yellow socket in the
tractor and only then connect the red connector to the red socket in the tractor. Once the 2nd
line is connected, the braking system will switch to normal mode of operation (disconnection
or interruption of the lines causes the trailer's braking system control valve to automatically
apply brakes). Lines are marked with coloured protective covers, which identify the
appropriate system line.
IMPORTANT
Trailer may only be hitched to a tractor, which has the appropriate hitch, connection
sockets for braking, hydraulic and electrical systems, and hydraulic oil in both machines
is the same type and may be mixed.
When hitching is completed, secure the electrical leads and hydraulic and braking system
lines in such a way that they do not become entangled in tractor's moving parts and are
not at the risk of breaking or severed when making turns.
Ensure compatibility of oils in tractor hydraulic system and in the trailer hydraulic system.
Disconnecting the trailer
In order to disconnect the trailer from the tractor follow these steps.
Immobilise tractor and trailer with parking brake.
Place chocks under trailer wheel.