Service brakes, airRecall 85V-113 · 1982–1985 Mack MH

MACK TRUCKS, INCORPORATED recall 85V-113 covers 5,020 1982–1985 Mack MH for a service brakes, air problem, reported to NHTSA on September 17, 1985.

Vehicles repairedNo manufacturer report yet

Vehicles affected5,0201 model

ReportedSep 17, 1985Owners notified Feb 7, 1986

Complaints since0Same system, after the recall

Source: NHTSA recall 85V113000 and manufacturer quarterly reports. Started by the manufacturer.

What's wrong

The problem

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.

What to do

The fix

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.

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, 1984, 1985

Built from January 1, 1982 to December 1, 1984. Not every vehicle in these model years is included; check by VIN.