NHTSA Campaign Id 89V129000; Date: Aug. 7, 1989
Reduced braking creates the potential for an accident.
1988 Freightliner Freightliner
Component: Service Brakes, Hydraulic:foundation Components:differential Proportional Valve
Manufactured by: Freightliner Corp.
Affected Units:: 41
Trucks will experience reduced braking at low brake application pressures when operating in the bobtail mode.
Replace front axle ratio valves with standard valving that does not reduce application pressure.
System:brakes. Vehicle description:heavy duty trucks equipped with rear axle bobtail brakeproportioning and front axle brake ratio valves.
Date Owners notified by Manufacturer: Sep 27, 1989
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