12
Introduction
WABCO requires that the motor axis is positioned at an angle b0 degrees and +10 degrees
with the horizontal plane, with the motor end pointing up and between -20 degrees and +20 degrees of
rotation of the motor axis. Contact the OEM or WABCO for additional information regarding the modulator
assembly’s orientation.
4013016a
0°±20°
360°
Z
1:2
5°±5°
±X
±Y
3.4
System Components
The SmartTrac™ hydraulic ABS unit consists of an electronic control unit (ECU) mounted directly on a
modulator assembly. The assembly is manufactured and sold as one part. Replacement of the individual
components is not available.
3.4.1
Electronic Control Unit (ECU)
The electronic control unit (ECU) processes sensor signals and generates solenoid valve commands to
reduce, maintain or reapply brake pressure.
4011784a
SmartTrac™
ECU
