35
Component Replacement
Installation
WABCO recommends that the motor axis makes 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 modulator assembly orientation.
1. Secure the replacement SmartTrac™ hydraulic module to the original bracket using the three mounting
bolts and tighten to 70.8 +12/0 in-lb (8 +2/-0 Nm). Install the splash shield and mounting assist bracket
using the two splash shield bolts and tighten to 19 +2.2 ft-lb (25 +3 Nm). Ensure the assist bracket is
sandwiched between the ABS module mounting bracket and the splash shield is positioned as it was
originally installed.
4011782a
2. Position the replacement SmartTrac™ assembly in place on the vehicle as shown. Install and tighten
the bracket-to-frame fasteners to the OEM specification.
3. Connect and tighten the brake line connections to 11 +2.2 ft-lb (15 +3 Nm). Ensure that the thread
savers are not tightened beyond 15 +2.2 ft-lb (20 +3 Nm).
4. Connect and lock the electrical harness to the ECU.
5. Bleed the brake system, per the following instructions.
5.1.5
ESC Module Mounting
The ESC module contains sensors which measure both lateral acceleration and yaw rate. Thus, it is critical
that the module is securely mounted, leveled and in correct location to the vehicle and that the module is
mounted as expected by the ECU and as per vehicle OEM specifications.
The module should be installed in a manner where the label is right side up. The module must be mounted
perpendicular to the vehicle frame rails on a cross member or cross member bracket. The module
connector could be facing the front or rear of the vehicle depending on the OEM’s specified mounting. It is
critical that the unit be mounted in the exact location and manner as originally installed by the vehicle
manufacturer.
