The defect
USE OF THE AIR HORN CAN CAUSE THE AIR PRESSURE TO DROP BELOW 85 PSI.
The risk
IF AIR PRESSURE DROPS BELOW 85 PSI WHILE THE VEHICLE ISBEING DRIVEN THE REAR BRAKE SPRING CHAMBERS WILL START TO APPLY CAUSING THEREAR BRAKE DRUMS TO OVERHEAT.
The remedy
INSTALL PRESSURE PROTECTION VALVES IN ALL AIR HORN CIRCUITS.
NHTSA's own wording · initiated by ODI
Vehicles covered
| Model | Model years |
|---|---|
| Emergency ONE Ambulance | 1984, 1985, 1986, 1987 |
Components: SERVICE BRAKES, AIR:SUPPLY:LOW PRESSURE WARNING:SWITCH
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Emergency ONE Ambulance | 1984 | 0 | 1 |
| Emergency ONE Ambulance | 1985 | 0 | 1 |
| Emergency ONE Ambulance | 1986 | 0 | 1 |
| Emergency ONE Ambulance | 1987 | 0 | 1 |
Other service brakes, air recalls in 1988
9 of the 197 recall campaigns reported to NHTSA in 1988 concerned the service brakes, air; E-ONE, INC. filed 13 campaigns in all.
| 88V179000 18 Nov 1988 | LANDOLL CORPORATION |
| 88V151000 16 Sept 1988 | FONTAINE MODIFICATION CO. |
| 88V140000 25 Aug 1988 | PACCAR, INCORPORATED |
| 88V137000 16 Aug 1988 | GENERAL MOTORS CORP. |
| 88V126000 28 Jul 1988 | MACK TRUCKS, INCORPORATED |
| 88V075000 2 May 1988 | THOMAS BUILT BUSES, INC. |
| 88V067000 19 Apr 1988 | GENERAL MOTORS CORP. |
| 88V062000 14 Apr 1988 | ISUZU MOTORS LIMITED |
NHTSA recalls (public domain) · all recalls of 1988