HL180T
13
2.6. Pneumatic system
Pneumatic system serves only for the braking of the trailer. Working brakes are
actuated through pressing the brake pedal in the tractor. Pneumatic braking system
includes emergency relay valve that actuates the brakes in case of supply pipe failure or
trailer disconnection from the tractor. Brakes can be deactivated by pressing black
button on the relay emergency valve. In addition braking system can be equipped with
load sensing valve, which regulates the pressure of the brake actuators according to the
load of the trailer.
There two types of pneumatic braking system: single line and dual line system. In the
single line system the trailer brake valve is actuated with dropping pressure and the air
reservoir in the trailer is filled when the trailer control valve is not actuated. In dual line
system the trailer braking valve is actuated through a single (control) line with increasing
pressure and the second (supply) line continually fills the air reservoir in the trailer when
required. The appropriate schemes of pneumatic braking system are provided in
Figure
7, Figure 8 & Figure 9
.
Figure 7:
The scheme of single line pneumatic braking system
Summary of Contents for HookLoada HL180T
Page 1: ......
Page 41: ...HL180T 40 Figure 19 Location of lubricating points from top of the trailer ...
Page 42: ...HL180T 41 Figure 20 Location of lubricating points from bottom of the trailer ...
Page 46: ...HL180T SPARE PARTS BOOK ...
Page 47: ...HL180T 2 Figure 1 HL180T trailer main components ...
Page 50: ...HL180T 3 Figure 3 Rear frame parts ...
Page 56: ...HL180T 9 Figure 8 Telescopic support leg valve cover front lights parts ...
Page 60: ...HL180T 13 Figure 11 Hydro cylinders parts ...
Page 64: ...HL180T 17 ...