Service brakes, air: Controls, pedals and linkages07/24/198989V121000
THE REAR AXLE RELAY VALVES (ONE PER AXLE) MAY NOT MEET BRAKE RELEASE TIMING REQUIREMENTS OF FMVSS 121.
Consequence
THE REAR AXLE BRAKES MAY NOT RELEASE IN THE TIMESSPECIFIED BY FMVSS 121.
Remedy
REPLACE THE NONCOMPLYING RELAY VALVES.
SYSTEM:REAR AXLE AIR BRAKE RELAY VALVES/FMVSS 121.VEHICLE DESCRIPTION:HEAVY DUTY TRUCKS.
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