Supply: check valveRecall 84V-035 · 1982–1983 Mack MH

MACK TRUCKS, INCORPORATED recall 84V-035 covers 850 1982–1983 Mack MH for a supply: check valve problem, reported to NHTSA on March 23, 1984.

Vehicles repairedNo manufacturer report yet

Vehicles affected8501 model

ReportedMar 23, 1984Owner notice date not listed

Complaints since0Same system, after the recall

Source: NHTSA recall 84V035000 and manufacturer quarterly reports. Started by the manufacturer.

What's wrong

The problem

A MANUFACTURING ERROR RESULTED IN THE INSTALLATION OF CARBON STEEL SPRINGS IN SOME DUAL-COMPARTMENT AIR RESERVOIR CHECK VALVES. CARBON STEEL SPRINGS ARE INADEQUATE FOR THIS APPLICATION BECAUSE THEY ARE SUBJECT TO SEVERE CORROSION AND SUBSEQUENT FAILURE OF THE CHECK VALVE.

What to do

The fix

THE CARBON STEEL SPRING WILL BE REPLACED WITH A STAINLESS STEEL ONE.

VEHICLE DESCRIPTION: HEAVY TRUCKS.SYSTEM: SERVICE BRAKES; DUAL COMPARTMENT AIR RESERVOIR CHECK VALVE.CONSEQUENCES OF DEFECT: IF THIS CHECK VALVE FAILURE WERE COMBINED WITH ASEVERED LINE IN THE PRIMARY AIR SYSTEM, COMPLETE LOSS OF BRAKES AND POSSIBLEVEHICLE CRASH COULD OCCUR.

Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.

1 model

Vehicles in this recall

Mack MH1982, 1983

Built from April 1, 1982 to November 1, 1983. Not every vehicle in these model years is included; check by VIN.