ABS-MT-SH
M939 SERIES ANTI-LOCK BRAKE SYSTEM
MAINTENANCE SUSTAINMENT TRAINING; Student Handout ABS-MT-SH
ABS-MT-SH - Page 11 of 19
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Overview of ABS Component Data
Wheel End:
•Torque sensors to 110-145 ft lbs
•Air gap adjusted by pushing sensors until fully seated (sensor
shoulder seated flush with bracket housing).
•Torque toner rings to 110 – 130 in. lbs (Basic & A1 Models).
Air Dryer:
•Torque to 30 – 45 ft. lbs
Relay valves:
•Torque to 30 – 45 ft. lbs
Limiting Valve (LQ2):
•Limits the amount of delivery air (67%) to front brake chambers.
Electrical Systems (ABS):
•Powered by vehicle electrical system.
Operating range of 21 – 32
vdc
•28 pin connector at ECU. -- Nine (9) not used.
•Diagnostic Connector Assembly (DCA).
•Protective fuses.
15 amp protects main power circuit.
3 amp
protects ABS light assembly
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