The defect
LOW AIR WARNING PRESSURE SWITCH MAY NOT ACTIVATE THE WARNING SIGNAL UNTIL PRESSURE HAS DROPPED TO 55 PSI, RATHER THAN AT THE REQUIRED 60 PSI.
The risk
DRIVER WOULD NOT RECEIVE PROPER WARNING OF LOW AIR PRESSURE IN AIR BRAKE SYSTEM AND THIS CONDITION COULD RESULT IN A VEHICLE CRASH; ALSO, VEHICLE WOULD NOT COMPLY WITH FMVSS 121.
The remedy
REPLACE INAPPROPRIATE AIR WARNING PRESSURE SWITCHES.
NHTSA's own wording · initiated by OVSC
Vehicles covered
| Model | Model years |
|---|---|
| Marmon 57L | 1988, 1989, 1990 |
| Marmon 57P | 1988, 1989, 1990 |
| Marmon 86P | 1988, 1989, 1990 |
Components: SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Marmon 57L | 1988 | 0 | 1 |
| Marmon 57L | 1989 | 0 | 1 |
| Marmon 57L | 1990 | 0 | 1 |
| Marmon 57P | 1988 | 0 | 1 |
| Marmon 57P | 1989 | 0 | 1 |
| Marmon 57P | 1990 | 0 | 1 |
| Marmon 86P | 1988 | 0 | 1 |
| Marmon 86P | 1989 | 0 | 1 |
| Marmon 86P | 1990 | 0 | 1 |
Other service brakes, air recalls in 1990
7 of the 208 recall campaigns reported to NHTSA in 1990 concerned the service brakes, air; MARMON MOTOR COMPANY filed 4 campaigns in all.
| 90V199000 6 Dec 1990 | COLLINS BUS CORPORATION |
| 90V180000 1 Nov 1990 | VOLVO GM HEAVY TRUCK CORP |
| 90V121000 25 Jun 1990 | FORD MOTOR COMPANY |
| 90V083000 3 May 1990 | BANKHEAD TRANSPORTATION |
| 90V075000 16 Apr 1990 | OSHKOSH TRUCK CORPORATION |
| 90V027000 12 Feb 1990 | STRICK CORPORATION |
NHTSA recalls (public domain) · all recalls of 1990