Brake system technical data

GF42.00-W-0001-01A

Brake system technical data

Model

374, 375, 930, 932, 933, 940, 942, 943, 944, 950, 952, 953, 954, 957, 970, 972, 974, 975, 976

Model

934

except code BC2 (Electronic Air Processing Unit (EAPU))

General specifications for brake system

Service brakes

Dual circuit, brake system with ABS, working purely pneumatically, or with an electropneumatically overlaid circuit

Parking brake and auxiliary brake

Spring-loaded actuator

Permanent brake

Engine brake (Turbobrake or exhaust flap and constant throttle), retarder

Pressure regulator with a constant pressure system:
Shutoff pressure
Cut-in pressure
Pressure regulator with pressure control system:
Shutoff pressure
Cut-in pressure

12 (-0.3/+0.6) bar
 9.8 bar

10 (-0.2/+0.6) bar
 9.3 bar

Operating pressure of service brake (circuit 1 and 2) with constant pressure system
Operating pressure of service brake (circuit 1 and 2) with pressure control system

10 (-0.5/+0.7) bar
10 (-0.2/+0.6) bar

Operating pressure of parking brake, trailer brake and consumers (circuit 3 and 4)

8.5 (+0.2/-0.5) bar

Four-circuit protection valve:
Opening pressure, circuits 1 and 2 (connections 21, 22)
Closing pressure, circuits 1 and 2 (connections 21, 22)
Opening pressure, circuits 3 and 4 (connections 23, 24, 25, 26, 27, 28)
Closing pressure, circuits 3 and 4 (connections 23, 24, 25, 26, 27, 28)

 Closing pressure = static safety pressure (without post-delivery and 0 bar in defective circuit)

9.0 (-0.3) bar
 4.5 bar
7.5 (-0.3) bar
 4.5 bar

Pressure at coupling head, reserve

Maximum 8.5 bar

Pressure at coupling head, brake

Maximum 8.5 bar

Design pressure of towing vehicle with constant pressure system
Design pressure of towing vehicle with pressure control system
 Vehicles with relay valves on leading axle:
On these vehicles, the design pressure for the leading axle corresponds to the bellows pressure at the leading axle that can be achieved with permissible axle load, divided by 1.5 (pressure ratio of pressure reduction valve).

8.5 bar
8.0 bar