Humbaur HBT - Page 77

Operation: chassis 79
Spring-loaded parking brake (option)
1
2
3
4
5
6
7
8
Operating the spring-loaded parking brake
The spring-loaded parking brake is
pneumatically controlled and is applied
via the spring-loaded diaphragm brake
cylinders.
If spring-loaded parking brake is
engaged and released several times, the
pressure in the system sinks. If the
pressure falls under 5.2 bar, the spring-
loaded parking brake can no longer be
released using the operating element.
The spring-loaded parking brake can
then only be released via the emergency
release device.
For information on the
emergency release device, refer
to the chapter entitled
“Emergency release device”,
see page 280.
Securing trailer
Fig. 17 Trailer secured
1 Wheel chocks in place
 Check before releasing the spring-
loaded parking brake that:
- the wheel chocks are in place and/or
- the trailer is properly coupled to the
towing vehicle.
Brakes
Fig. 18 Operating point
1 Spring-loaded parking brake (red, square)
 Pull out the spring-loaded parking
brake (Fig. 18/1).
The trailer is braked.
Releasing
 Press the spring-loaded parking brake
(Fig. 18/1).
The trailer is unbraked.
B - 031
1
F - 018
1