Service brakes, air › Antilock › Control unit/module
Freightliner Freightliner
Reported Apr 19, 197812 vehicles affectedFREIGHTLINER CORP.Built Jan 1, 1975 – May 1, 1975
The defect
An operational amplifier in the axle controllers on the involved vehicles may deviate from specifications. There may also be an opening in a solder connection between the printed circuit board and the negative terminal of the capacitor. These conditions cause the anti-lock valve solenoid to be energized continuously.
The remedy
The incorrect controller will be replaced with a new one.
Vehicle description: heavy trucks equipped with eaton anti-lock systems.system: service brakes; axle controllers.consequences of defect: the constantly energized solenoid prevents applicationof the brakes on the axle being controlled by the affected anti-lock system.this condition would lead to longer vehicle stopping distances, and thepossibility of a vehicle accident.note: the brake warning light would not be activated if this type of failureoccurred.