The defect
THE INVOLVED VEHICLES DO NOT CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKE SYSTEMS". DUE TO THE USE OF A LOAD PROPORTIONING VALVE IN THE BRAKE SYSTEM, THE BRAKE ACTIVATION AND RELEASE TIME IN AN UNLOADED CONDITION, MAY NOT MEET THE REQUIREMENTS. IN ADDITION, A DOUBLE CHECK VALVE REQUIRED ON A TWO AIR TANK SYSTEM WAS INADVERTENTLY OMITTED.
The remedy
THE LOAD PROPORTIONING VALVE WILL BE REMOVED AND THE SYSTEM WILL BE "REPLUMBED" IN ORDER TO MEET SAFETY STANDARD REQUIREMENTS.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|
Components: SERVICE BRAKES, AIR
Other service brakes, air recalls in 1979
19 of the 274 recall campaigns reported to NHTSA in 1979 concerned the service brakes, air; MAGIRUS DEUTZ A.G., WEST filed 2 campaigns in all.
| 79V250000 19 Nov 1979 | GRUMMAN FLXIBLE CORP. |
| 79V253000 15 Nov 1979 | HENDRICKSON MFG. CO. |
| 79V248000 15 Nov 1979 | GRUMMAN FLXIBLE CORP. |
| 79V241000 2 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. |
NHTSA recalls (public domain) · all recalls of 1979