MACK MH 1983: SERVICE BRAKES, AIR
NHTSA Campaign ID Number: 85V113000
| Make | Model | Year |
|---|---|---|
| MACK | MH | 1983 |
| Date Owners Notified | Date Received by ODI | Date Added to Database |
| 1986-02-07 | 1985-09-17 | 1985-09-24 |
Production Dates: 1982-01-01 - 1984-12-01
Manufacturers Involved: Mack Trucks, Inc.
Component: SERVICE BRAKES, AIR
Potential Number Of Units Affected: 5020
Report Initiator: MFR MFR Report
THE DUAL DOUBLE CHECK VALVE MAY NOT RELEASE THE PROPER AIR VOLUME TO THE BRAKE SYSTEM, CAUSING A SLIGHT TIMING DELAY BETWEEN THE TRACTOR AND THE TRAILER BRAKE SYSTEM. CONSEQUENCES OF DEFECT: IF THE BRAKES ARE SUDDENLY APPLIED, THE TRAILER COULD JACKKNIFE WITHOUT WARNING TO THE OPERATOR, WHICH COULD RESULT IN A VEHICLE CRASH.
INSTALL TWO NEW SLEEVES IN THE DUAL DOUBLE CHECK VALVE WHICH WILL INCREASE AIR FLOW.
VEHICLE DESCRIPTION: HEAVY DUTY TRACTOR TRAILER COMBINATIONS. SYSTEM: BRAKES, TRACTOR TO TRAILER.
