BAS function in normal operation - GF42.31-P-3000A
MODELS 129,140 as of 1.12.96, 210 as of 1.2.97, 170, 202 as of 1.6.97, 168 up to 28.2.01, 163, 203, 208, 209, 215, 220
Brake application in normal operation
The BAS brake booster (A7/7) is supplied continuously via the vacuum line with inlet manifold vacuum or pump vacuum on diesel models. If the brake is not actuated, equal vacuum exists on both sides of the diaphragms. The compression spring holds the vacuum piston in its starting position.
On brake application, atmospheric air is fed to the back of the diaphragms via a duct. A pressure difference that increases with the braking is created between the front and rear chambers of the booster and the resulting force acts in the direction of the master brake cylinder and supplements foot pressure.
Illustration shows partial braking
| BAS pressure increase function | GF42.31-P-3100A | ||
| BAS pressure reduction function | GF42.31-P-3200A | ||
| BAS brake booster, location / task / design / function | GF42.31-P-4000A | ||
| BAS control module, location / task / function | GF42.31-P-4500A |