The defect
THE REAR EMERGENCY GLAD HAND WAS IMPROPERLY CONNECTED DIRECTLY TO THE REAR AIR TANK RATHER THAN TO THE EMERGENCY PORT OF THE TASK VALVE. CONSEQUENTLY, IF THE AIR SUPPLY TO THE LEAD TRAILER BECAME DISCONNECTED, THE EMERGENCY BRAKES WOULD BE APPLIED BUT THE REAR TRAILER"S WOULD NOT. A HEAVY BRAKE APPLICATION WOULD CAUSE THE REAR TRAILER TO PUSH THE LEAD TRAILER FORWARD, INCREASING THE VEHICLE BRAKING DISTANCE, AND CREATING THE POTENTIAL FOR A JACK KNIFE.
The remedy
DEALER WILL INSPECT AND, IF NECESSARY, MODIFY THE CONNECTIONS IN THE BRAKING SYSTEM, WITHOUT CHARGE TO OWNER.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|
Components: SERVICE BRAKES, AIR:SUPPLY:HOSES, LINES/PIPING, AND FITTINGS
Other service brakes, air recalls in 1979
19 of the 274 recall campaigns reported to NHTSA in 1979 concerned the service brakes, air; PULLMAN, INCORPORATED filed 5 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