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EQUIPMENT DESCRIPTION: MANIFOLD DASH VALVES (MDV) USED IN TRACTOR AND TRAILER PARKING BRAKES. THESE VALVES DO NOT MEET THE REQUIREMENTS OF FMVSS NO. 121, "AIR BRAKE SYSTEMS." A LOSS OF THE ISOLATION OF THE TWO BRAKE SYSTEM CIRCUITS CAN RESULT IN THE LOSS OF SERVICE BRAKES WHEN THERE IS ANOTHER FAILURE OF ONE OF THE TWO BRAKE CIRCUITS.
THE LOSS OF SERVICE BRAKES CAN OCCUR, INCREASING THE RISK OF A CRASH.
A REPLACEMENT VALVE WILL BE PROVIDED TO OWNERS WITH INSTALLATION INSTRUCTIONS.
Made between 5/1/1997 and 12/31/1997
Potential Number of Units Affected: 23,632
Date Owner Notified by Mfr: 1/1/2000
Recall Initiator: MFR
Federal Motor Vehicle Safety Standard Number: 121
Regulation Part Number: 571
NHTSA Campaign Number: 99E046000