The defect
FOREIGN MATERIAL MAY COLLECT UNDER THE BALANCE BEAM OF THE TREADLE VALVE. IF DEBRIS IS ALLOWED TO COLLECT AND REMAIN UNDER THE BALANCE BEAM, COMPLETE ACTUATION OF THE TREADLE VALVE MAY BE IMPAIRED. THIS COULD LEAD TO BRAKE FAILURE.
The remedy
THE TREADLE VALVE SHOULD BE INSPECTED AT REGULAR INTERVALS FOR ANY FOREIGN MATERIAL THAT MAY HAVE COLLECTED. ALSO, DEALER WILL INSTALL A DEBRIS DISPLACER UNDER THE TREADLE VALVE BALANCE BEAM AT NO COST TO OWNER.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|
Components: SERVICE BRAKES, AIR:CONTROLS:FOOT CONTROL/VALVE
Other service brakes, air recalls in 1979
19 of the 274 recall campaigns reported to NHTSA in 1979 concerned the service brakes, air; GRUMMAN FLXIBLE CORP. filed 42 campaigns in all.
| 79V250000 19 Nov 1979 | GRUMMAN FLXIBLE CORP. |
| 79V253000 15 Nov 1979 | HENDRICKSON MFG. CO. |
| 79V248000 15 Nov 1979 | GRUMMAN FLXIBLE CORP. |
| 79V211000 18 Sept 1979 | INTERNATIONAL HARVESTER |
| 79V216000 13 Sept 1979 | PACCAR, INCORPORATED |
| 79V188000 15 Aug 1979 | TRANSPORTATION MFG. CORP. |
| 79V187000 8 Aug 1979 | GENERAL MOTORS CORP. |
| 79V178000 1 Aug 1979 | MOTOR COACH IND., INC. |
NHTSA recalls (public domain) · all recalls of 1979