NHTSA recall 90V121000
Service brakes, air › Controls, pedals and linkages
Ford L8000 and 16 more
Reported Jun 25, 199015,260 vehicles affectedFORD MOTOR COMPANYBuilt Mar 1, 1989 – Jan 1, 1990
The defect
Secondary service reservoir air check valves may not seat properly due to a mechanical interference condition between a circular brass guide and the wall of a cylindrical ferrule in which the brass guide IS intended to move freely.
The risk
In the event of pressure loss in the supply reservoir,a defective check valve would allow pressure equalization between primary andsecondary service reservoirs, presenting the potential for loss or absence offront braking ability, which could cause loss of control and an accident.
The remedy
Install revised design secondary service reservoir check valve components.