Service manual

TC Series Hydraulic Brake ABS System
030.1-5
System Components
The following components are the Meritor WABCO
Hydraulic ABS:
•
Electronic Control Unit, see Figure 1.3—
Electronic Control Unit
1. Processes sensor signals and generates solenoid
valve commands to reduce maintain or reapply
brake pressure.
2. Mounting locations vary, depending on the
vehicle specifications for the exact location.
Figure 1.3—Electronic Control Unit
•
Modulator Assembly, see Figure 1.4—
Modulator Assembly
3. Houses the ABS solenoid control valves, (one
inlet valve and one outlet valve per wheel), a
pump motor and two (2) accumulators.
Modulator should not be exposed to impact
loads, excessive vibrations or compressed air
blown into the hydraulic ports.
BRAKE FLUID IS FLAMMABLE AND
TOXIC TO SKIN, EYES AND
RESPIRATORY TRACT. SKIN AND EYE
PROTECTION IS REQUIRED. AVOID
REPEATED OR PROLONGED CONTACT.
DRAIN FLUID IN A WELL-VENTILATED
AREA.
4. Sensors contain brake fluid and must be handled
with appropriate care.
Figure 1.4—Modulator Assembly
•
Sensor with Molded Socket, see Figure 1.5—
Molded Socket
5. Measures the speed of a tooth wheel rotating
with the vehicle wheel.
6. Produces an output voltage proportional to
wheel speed.
Figure 1.5—Sensor with Molded Socket
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