Zetor FORTERRA HSX 120, Operator'S Manual

Page: 120 / 232

*Hydraulic brakes of trailers
Connecting and disconnecting quick couplings of trailer hydraulic brakes
When connecting and disconnecting quick couplings, take increased care with regard for
remaining oil which remains in the socket or in the plug of quick coupling. For ecological reasons, it
is necessary to remove this remaining oil after every disconnection of quick couplings with any
textile material.
The socket for connection of the electrical installation of the trailer or semi-trailer
Connect hydraulic brakes of trailer or articulated
trailer to the quick couplings marked by an arrow.
Control of hydraulic brakes of trailers (articulated trailers)
and control of tractor brakes is done so that the braking
effect of both vehicles is synchronized. Working pressure
is derived by oil supplied by non-switched on/switched off
gear pump of hydraulics. Brake valve of the trailer is done
by the pressure of brake fluid from main braking rollers
depending on the force effecting on the brake pedal. The
pressure on clutch head must be 12 - 15 MPa with
maximum depression of brake pedal. Brake valve of trailer
prefers the function of brakes to the function of hydraulics.
If there are shocks when foot brake pedals are depressed
in the pipeline of hydraulic circuit, it is necessary to bleed
the hose from the brake valve to the quick coupling.
When driving with connected trailer or
articulated trailer, the pedals of foot brake must be
connected and secured by a valve! When braking with
one brake pedal, hydraulic brakes of the trailer are not
active.
F18N037
The outlet for the trailer or semi-trailer wiring is located at
the rear of the tractor.
Behind the outlet bracket there is a wire allowing for
controlling handbrake for trailers or semi-trailers with
a hydraulic braking system.
There is a three-pin socket on outlet bracket for powering
trailer or semi-trailer attachments.
F18N038
DRIVING OPERATION
119