On certain chassis built with lng engines, the nexgen lng tank's primary and secondary relief valves could fail to open and relieve tank pressure.
Risk and remedy
Risk
This could cause ice buildup on the discharge side of the primary and secondary pressure system allowing the relief system to freeze and become blocked resulting in over pressurization of the lng tanks creating the risk of catastrophic tank rupture which could cause serious injury or death.
Remedy
Dealers will retrofit the lng tanks with a new primary relief valve pipe away tube and a new ventilated shroud. the recall began april 6, 2004. owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact mack at 1-610-709-3337.
Vehicle description: heavy duty trucks built with bendix air ABS with an EC-17 1030r electronic control unit (ecu), there have been reports of unwanted ABS activation at low speeds caused by 1) chafed ABS wheel speed sensor wires on rotating parts or 2) a damaged component at the wheel end that generates a certain type of erratic sensor signal.
Risk and remedy
Risk
This condition could cause the ABS ecu to exhaust the air at the air brake modulators for one or more of the wheels. this could result in extended braking distances and a possible crash.
Vehicle description: class 8 heavy duty truck chassis equipped with mack 16,000 lb., 18,000 lb., or 20,000 lb. Heavy duty steering axles. the inner wheel bearing cone for the steering axle wheel hub assembly does not properly fit onto the mack steering axle spindle assembly. improper fit of the bearing to the spindle increases the stress levels to the…
Risk and remedy
Risk
If the spindle fails, a loss of driver control could occur, increasing the risk of a vehicle crash.
Remedy
Dealers will remove the left and right hub/drum assemblies from the steering axles and replace the inner wheel bearing cones and cups.
Technical service bulletins and other communications the manufacturer sent dealers about this vehicle. Ask a dealer for the full document by its number.
10215315Programming Failure - Chassis With Cummins Engine And An Allison Transmission
10215312(Back Office) - Cruise Control Inoperative After Updating Software VECU5 Without ESP Package (UESP).
10215289Automated Manual Transmission ( AMT ) I-Shift / mDRIVE - Ribbon Harness Replacement - Speed Sensor Bolts, Possible Fault Codes P1058 - 21 Or MID 130 PID 161 FMI 1
10213633USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E
10213632NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions
10213630Mack Chassis - Vehicles Equipped With An Automated Manual Transmission Model F ( AMT-F, mDrive ), Premium Tech Tool ( PTT ) Gearbox Calibration Failure; Gearbox Calibration Operation Stops And Fails At 33% When Run With Transmission Removed
10213625Mack - PTO Pump Speed Calculator
10213612(Back Office Only) Mack Chassis - Cruise Control Inoperative After Disabling The Electronic Stability Program (ESP)
10213609Mack Chassis - Diesel Exhaust Fluid ( DEF ) System Cleaning/Flush After DEF Pump Failure Or System Contamination
10213608Mack Chassis - Bendix Vendor Configuration Program ( VCP ) Software Download Information
10213605Mack Chassis - Diagnostic Trouble Codes ( DTC's ) - P020113, P020213, P020313, P020413, P020513, P020613, Cylinders 1 Through 6 Injector A Open Circuit
Every Mack MR model year
Bars are owner complaints, dots mark years with recalls. Select a year to open its report.