TWO SCREWS THAT HOLD DETENT RAIL TO VALVE BODY CAN LOOSEN AND BACK OUT. ALSO, VALVE BODY CAN BREAK AT POINT WHERE DETENT RAIL ATTACHING SCREWS ARE THREADED INTO BODY.
RiskDETENT RAIL WOULD BECOME FREE RESULTING IN PARKING BRAKECONTROL HANDLE JAMMING AND NOT RELEASING OR ENGAGING THE PARKING BRAKE.
FixREPLACE SUSPECT VALVE WITH IMPROVED VALVE.