Checking The Air Systems For Leaks; Working Pressure Of Trailer Air Brakes; Maintenance And Treatment Of Tyres - Zetor FORTERRA HSX 120 Operator's Manual

Checking the air systems for leaks

- fill the air reservoir to the maximum pressure (730 ± 20
kPa).
- with the engine stopped the air pressure must not drop
by more than 10 kPa in 10 minutes.
Perform the leak check daily before driving with
a trailer or semi-trailer. In case of a brake system
failure or if the pressure drops below 450 ± 30 kPa, the
warning indicator on the dashboard will light up.

Working Pressure of Trailer Air Brakes

In the one- and two-hose version, the air pressure at the
two-hose coupling head (2) (red valve) is 740 ± 20 kPa
and at the single-hose coupling head (1) max. 600 ± 20
kPa (at the moment when the pressure regulator relieves
the compressor - blows out).

Maintenance and treatment of tyres

Regularly check the outer surface of tyres and verify whether they are free of defects at the sides and over
the bead and whether the reinforcement is not damaged.
Do not use tyres that show a defect any longer.
Tyre inflation
The basic recommended inflation values are specified in the table. Regularly check the tyre pressure before
driving, when the tyres are cold. To inflate the tyres use the pressure controller (B), which acts as a pressure
equalizer, tyre filling device and safety valve. Remove the rubber cap of the pressure controller and screw
a tyre inflation hose instead. Screw the hose up to the end of the thread to compress the non-return valve. If
there is the maximum pressure in the air reservoir (A), the tyres cannot be inflated. In this case you must first
reduce the pressure with the condensate drain valve located in the bottom part of the air reservoir (A). After
inflating the tyres you must put the rubber cap back on the pressure controller.
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MAINTENANCE INSTRUCTIONS
FCL20S5049
P18N013
FCL20S5047