The defect
THE LOW AIR PRESSURE SWITCHES USED ON SOME OF THE INVOLVED VEHICLES HAVE A MANUFACTURING TOLERANCE THAT ISSUES A WARNING ONLY WHEN THE PRESSURE DROPS A FEW POUNDS PER SQUARE INCH BELOW 60 PSI. AS A RESULT, THEY DO NOT COMPLY WITH FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKE SYSTEMS".
The remedy
IF THE OWNER, UPON RECEIPT OF A POST CARD, INDICATES A COMPLIANCE, THE DEALER WILL REIMBURSE OWNER $5.00 FOR COST OF TEST. IF OWNER INDICATES A NON-COMPLIANCE, THE DEALER WILL SEND TWO REPLACEMENT SWITCHES AND A CHECK FOR $5.00 TO COVER BOTH THE SYSTEM TEST AND SWITCH REPLACEMENT.
NHTSA's own wording · initiated by OVSC
Vehicles covered
| Model | Model years |
|---|
Components: SERVICE BRAKES, AIR:SUPPLY:LOW PRESSURE WARNING:SWITCH
Other service brakes, air recalls in 1979
19 of the 274 recall campaigns reported to NHTSA in 1979 concerned the service brakes, air; HENDRICKSON MFG. CO. filed 6 campaigns in all.
| 79V250000 19 Nov 1979 | GRUMMAN FLXIBLE CORP. |
| 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. |
| 79V178000 1 Aug 1979 | MOTOR COACH IND., INC. |
NHTSA recalls (public domain) · all recalls of 1979