1991 Mack U TSBs

Programming Failure - Chassis With Cummins Engine And An Allison Transmission

US10 Emission Engines - Diagnostic Trouble Code ( DTC ) SPN 1231 FMI 9 Troubleshooting.

Emcon (Spark Assist) Engine Aftertreatment System Troubleshooting Check Sheet - US07 Emissions

Low Oil Pressure Diagnostic Process For 11 Liter Engines

Mack Chassis - Diagnostic Trouble Codes ( DTC's ) - P020113, P020213, P020313, P020413, P020513, P020613, Cylinders 1...

(Back Office) - Cruise Control Inoperative After Updating Software VECU5 Without ESP Package (UESP).

No Start Condition After Over The Air Programing - VECU5 No Start "Safe State"

Temperature Sensor Troubleshooting Guide - US10+OBD13 And Newer

Low Voltage Disconnect (LVD), Function Description

NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions

Premium Tech Tool ( PTT ) Training Materials And Support Tools

DEF Pump Cycling periodically Hours After Key Off

Mack - PTO Pump Speed Calculator

(Back Office Only) Mack Chassis - Cruise Control Inoperative After Disabling The Electronic Stability Program (ESP)

DEF Pump Troubleshooting Guide - US10+OBD13 And Newer Emissions

Selective Catalytic Reduction (SCR) Muffler Troubleshooting Guide - US10+OBD13 And Newer Emissions

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Mack Chassis - Diesel Exhaust Fluid ( DEF ) System Cleaning/Flush After DEF Pump Failure Or System Contamination

Automated Manual Transmission ( AMT ) I-Shift / mDRIVE - Ribbon Harness Replacement - Speed Sensor Bolts, Possible Fault...

Mack Chassis - Vehicles Equipped With An Automated Manual Transmission Model F ( AMT-F, mDrive ), Premium Tech Tool (...

Electronically Controlled Suspension (ECS) Losing Air Pressure

Mack Chassis - Bendix Vendor Configuration Program ( VCP ) Software Download Information