13
Introduction
3.4.2
Modulator Assembly
CAUTION
The modulator assembly contains brake fluid. Handle the modulator assembly with appropriate
care. Do not expose the modulator assembly to impact loads or excessive vibrations. Do not blow
compressed air into the hydraulic ports. Mishandling the modulator assembly may lead to component
damage and system failure.
The modulator assembly houses the system’s solenoid control valves. There are three valves per wheel,
including an inlet and outlet for controlling ABS and the third to control ATC (rear axle only). The modulator
assembly also includes a pump motor, two low pressure accumulators and six fittings. Details about the
fittings can be seen below.
1
2
3
4
5
6
4011785a
Recommended tightening torque for the above mentioned fittings, known as thread savers, is
15 +2.2 ft-lb (20 +3 Nm).
Recommended tightening torque for brake line tube nuts is 11 +2.2 ft-lb (15 +3 Nm).
