Two-Hose Brakes; Hydraulic Brakes Of Trailers; Connecting And Disconnecting Quick Couplings Of Trailer Hydraulic Brakes - Zetor CRYSTAL Series Operator's Manual

Two-hose brakes

Operating pressure is adjusted with the control valve at
740 ± 20 kPa. Capacity of air tank is 20 l.
The valve of the left head is labelled in yellow (braking
branch), the valve of the right head is labelled in red (filling
branch).
When connecting the trailer (articulated trailer)
with a maximum permitted speed approved for the
type of tractor, the maximum permitted speed of set is
40 km per hour!
Maximum permitted speed of set is given by maximum
permitted speed of the slower vehicle of the set.

Hydraulic brakes of trailers

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.

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.
DRIVING OPERATION
FHD14N064
84
FHD14N063