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7 | Assembling the Parts
Notice
7.11
Notice
7.12
Notice
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Pin 30 sends the braking signal to the ABS control unit – al-
ways make sure it is connected (12 Volt)!
Terminal 15 remains open if the vehicle already has a brake
light switch.
Terminal 15 supplies the voltage to a retrofit brake light
switch.
Brake Lines
Use rigid steel tubes for the brake lines. Only use flexible lines when you have no
other option available. This keeps the volume consumption low and the ABS
needs less controlling.
The hydraulic unit is secured in the vehicle on the mounting plate provided. Dur‐
ing operation, the hydraulic unit will vibrate. These vibrations are then transfer‐
red to the brake lines. To prevent vibration‐induced damage to the brake lines,
they must not be secured at a distance of up to 20 cm from the hydraulic unit so
that they can vibrate freely.
We recommend using rigid metal brake lines; only use flisibel
steel lines at points where they are necessary.
Don not secure brake lines 0 to 20 cm from the hydraulic unit.
The unit vibrates and would cause risk of damage to the lines.
Please use brake pipes with a minimum inside diameter of
3.2°mm.
General: Brake Calipers
Use brake calipers that are as stiff as possible. Any flexing will create higher fluid
volume consumption. During ABS operation there will be a significantly higher
load on the brake piston seals. For this reason, brake piston seals will require
more frequent monitoring.
Monitor brake piston seals more often.
Use brake calipers that are as rigid as possible.
The higher the brake pressure is, the larger is the elasticity of
the brake. A blocking pressure of max. 80 bar is optimal.
ABS M4 Manual
Bosch Motorsport
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