NHTSA Campaign 95E003010

SERVICE BRAKES, AIR:SUPPLY:HOSES, LINES/PIPING, AND FITTINGS

Issued by MACK TRUCKS, INCORPORATED · Reported Jun 27, 1995 · 1,224 vehicles affected

What's wrong

AIR SYSTEM BLOCKAGE IN THE AIR DRYER OCCURS DEGRADING THE MOISTURE REMOVING CAPABILITIES OF THE DRYER WHEN THE VEHICLE IS OPERATED IN A COLD ENVIRONMENT AND MOISTURE ACCUMULATES AND FREEZES IN THE AIR DRYER OR IN THE LINE BETWEEN THE DRYER AND THE AIR SYSTEM RESERVOIR. THE AIR DRYER CAN BECOME OVERPRESSURIZED CAUSING THE AIR DRYER CARTRIDGE TO SEPARATE FROM THE MOUNTING BASE.

Consequence

IF THE AIR DRYER SEPARATES FROM THE BASE, THE CARTRIDGE CAN SEPARATE SUFFICIENTLY ENOUGH TO CAUSE PERSONAL INJURY OR PROPERTY DAMAGE.

Remedy

DEALERS WILL EQUIP AIR SYSTEMS WITH A PRESSURE RELIEF VALVE TO BE LOCATED BETWEEN THE COMPRESSOR AND THE AIR DRYER. THIS PRESSURE RELIEF VALVE IS INTENDED TO VENT IF EXCESSIVE PRESSURE DEVELOPS IN THE AIR DRYER.

Vehicles affected by this recall

Make Model Year Units
MACK CH 1992 1,224
MACK CH 1993 1,224
MACK CH 1994 1,224
MACK CH 1995 1,224
MACK CL 1992 1,224
MACK CL 1993 1,224
MACK CL 1994 1,224
MACK CL 1995 1,224
MACK DM 1992 1,224
MACK DM 1993 1,224
MACK DM 1994 1,224
MACK DM 1995 1,224
MACK MR 1992 1,224
MACK MR 1993 1,224
MACK MR 1994 1,224
MACK MR 1995 1,224
MACK RB 1992 1,224
MACK RB 1993 1,224
MACK RB 1994 1,224
MACK RB 1995 1,224
MACK RD 1992 1,224
MACK RD 1993 1,224
MACK RD 1994 1,224
MACK RD 1995 1,224

Source: NHTSA Campaign 95E003010 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.