EMERGENCY ONE AMBULANCE 1985: SERVICE BRAKES, AIR:SUPPLY:LOW PRESSURE WARNING:SWITCH

General Information

NHTSA Campaign ID Number: 88V171000

Make Model Year
EMERGENCY ONE AMBULANCE 1985
Date Owners Notified Date Received by ODI Date Added to Database
1988-12-07 1988-11-01 1988-11-18

Production Dates: 1977-01-01 - 1988-01-01

Manufacturers Involved: E-One Incorporated

Component: SERVICE BRAKES, AIR:SUPPLY:LOW PRESSURE WARNING:SWITCH

Potential Number Of Units Affected: 71

Report Initiator: ODI ODI Report

Summary

USE OF THE AIR HORN CAN CAUSE THE AIR PRESSURE TO DROP BELOW 85 PSI.

Consequence

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.

Remedy

INSTALL PRESSURE PROTECTION VALVES IN ALL AIR HORN CIRCUITS.

Notes

SYSTEM: AIR PRESSURE/BRAKES.VEHICLE INFORMATION: AMBULANCE UNITS WITH ROCKWELL U170 AND S170 AXLES.