Low pressure warning: switchRecall 88V-171 · 1984–1987 Emergency One Ambulance
E-ONE, INC. recall 88V-171 covers 71 1984–1987 Emergency One Ambulance for a low pressure warning: switch problem, reported to NHTSA on November 1, 1988.
Source: NHTSA recall 88V171000 and manufacturer quarterly reports. Started by an NHTSA defect investigation.
The problem
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 fix
INSTALL PRESSURE PROTECTION VALVES IN ALL AIR HORN CIRCUITS.
SYSTEM: AIR PRESSURE/BRAKES.VEHICLE INFORMATION: AMBULANCE UNITS WITH ROCKWELL U170 AND S170 AXLES.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
Vehicles in this recall
Built from January 1, 1977 to January 1, 1988. Not every vehicle in these model years is included; check by VIN.
The investigation behind this recall
- VARIOUS BRAKE PROBLEMSNHTSA