Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 2,701 bulletins for MACK
PI 0844
Apr 30, 2014
030000 BRAKES (PWS)
SOME MACK LEU TRUCKS WERE BUILT BETWEEN 08/15/2012?11/05/2012, WITH AN INVERSION VALVE INSTALLED INSTEAD OF A PRESSURE REDUCING VALVE FOR THE WORK BRAKE SYSTEM. THE EXISTING INVERSION VALVE (PART NUMBER 21007503) MAY CAUSE MAXIMUM BRAKE SYS
FSB 254-005
Apr 7, 2014
110000 ELECTRICAL SYSTEM
ATOMIZATION MODULE UPDATE, MACK TRUCKS INC. HAS RELEASED NEW UPDATED ATOMIZATION MODULES, PART NUMBERS 22258878 AND 22258875, TO IMPROVE RELIABILITY.
FSB-254-005
Apr 1, 2014
060000 ENGINE (PWS)
MACK: THERE HAS BEEN NEWLY RELEASED UPDATED ATOMIZATION MODULES IN ORDER TO IMPROVE RELIABILITY AND FUNCTION. *JS
PI-0767
Apr 1, 2014
021500 SUSPENSION:FRONT:CONTROL ARM
MACK TRUCKS: SLACK ADJUSTER CONTROL ARM. HALDEX SLACK ADJUSTERS AND RIDEWELL SUSPENSION MAY EXHIBIT A CONDITION WHICH ALLOWS THE SLACK ADJUSTER CONTROL ARM TO MAKE CONTACT WITH THE RIDEWELL SUSPENSION WALKING BEAM DURING STEEP SUSPENSION AR
PI-0843
Apr 1, 2014
180000 VEHICLE SPEED CONTROL
MACK: SOME VEHICLES MAY HAVE AN INCORRECT PARAMETER SETTING FOR THE VEHICLE SPEED SOURCE(AZI). THIS COULD CAUSE THE PARK BRAKE ALERT, INTER WHEEL DIFF LOCK, SPEEDOMETER AND VECU TO ALL MALFUNCTION. *JS
PI-0844
Apr 1, 2014
030000 BRAKES (PWS)
MACK: THERE IS A NEW PRESSURE REDUCTION VALVE TO REPLACE THE CURRENT INVERSION VALVE IN SOME MACK LEU TRUCKS BUILT BETWEEN 08/15/2012-11/05/2012. *JS
FSB 722-002
Mar 25, 2014
030000 BRAKES (PWS)
INTERFERENCE BETWEEN THE BRAKE LINING AND THE SPRING CAP WAS DISCOVERED ON SOME MACK CHU, CXU, GU, TD, LEU, MRU TRUCKS EQUIPPED WITH 203 MM (8 IN) REAR DRUM BRAKES AND CAMELBACK REAR SUSPENSION.
FSB 371-047
Mar 17, 2014
110000 ELECTRICAL SYSTEM
POWER WIRES, REROUTING, CERTAIN MACK CHU, CXU, GU, AND TD TRUCK MODELS BUILT BETWEEN 01/01/07 AND 10/22/13, UTILIZES TWO (RED) POWER WIRES THAT ROUTE FROM THE BUSSED ELECTRICAL CENTER (BEC) AND BEHIND THE RADIO. THE (RED) POWER WIRES COULD
FSB 846-002
Mar 12, 2014
135200 VISIBILITY:REARVIEW MIRRORS/DEVICES:EXTERIOR
AERO MIRROR VIBRATION, CERTAIN CHU, CXU, GU, AND TD VEHICLES, MAY EXPERIENCE ISSUES WITH AERO MIRROR GLASS VIBRATION WHEN THE VEHICLE IS IN OPERATION. INSTALLING FOUR (4) CLIPS TO THE BACK OF EACH MIRROR GLASS CAN HELP ADDRESS CONCERNS OF E
FSB-371-046
Mar 1, 2014
160000 STRUCTURE
MACK: THE FRAME RAIL GROUND STUD MAY HAVE BEEN TORQUED IMPROPERLY. THIS CAN CAUSE THE CORROSION INHIBITOR TO GET BETWEEN THE RING TERMINALS. APPLIES TO MODELS CHU, CXU, GU, TD PRODUCED BETWEEN 01/01/2010 AND 10/7/2013. *JS
FSB-371-047
Mar 1, 2014
114000 ELECTRICAL SYSTEM:WIRING
MACK: INFORMATION CONCERNING REROUTING THE RED POWER WIRES IN ORDER NOT TO CAUSE CHAFING. APPLIES TO CHU, CXU, GU, AND TD BUILT BETWEEN 01/01/07 AND 10/22/13. *JS
FSB-722-002
Mar 1, 2014
030000 BRAKES (PWS)
MACK: THERE MAYBE INTERFERENCE BETWEEN THE BRAKE LINING AND THE SPRING CAP ON TRUCKS WITH 203 MM REAR DRUM BRAKES AND CAMELBACK REAR SUSPENSION. THERE ARE NO SIGNS OF INTERFERENCE ON THE SPRING CAP. MODELS IN CHU, CXU, GU, TD, LEU, MRU BUIL
FSB-846-002
Mar 1, 2014
135000 VISIBILITY:REARVIEW MIRRORS/DEVICES
MACK: INFORMATION CONCERNING AERO MIRROR VIBRATION. INSTALLING FOUR (4) CLIPS TO THE BACK OF EACH MIRROR WILL LESSEN THE VIBRATION. MODELS INCLUDE CHU, CXU, GU, AND TD. NO MODEL YEARS PROVIDED. *JS
PI 0839
Feb 27, 2014
060000 ENGINE (PWS)
SOFTWARE UPDATES WITH ENHANCEMENTS ARE AVAILABLE FOR THE ENGINE CONTROL MODULE (ECM), AFTERTREATMENT CONTROL MODULE (ACM) AND TRANSMISSION ELECTRONIC CONTROL UNIT (TECU), IF EQUIPPED, FOR MACK VEHICLES EQUIPPED WITH MACK MP7, AND MP8 ENGINE
PI 0842
Feb 27, 2014
355100 EQUIPMENT:OTHER:LABELS
THERE ARE TWENTY-EIGHT (28) 2014 MODEL YEAR VEHICLES THAT WERE PRODUCED WITH A PREPRODUCTION ENGINE EMISSION CERTIFICATION LABEL. THESE VEHICLES NEED TO HAVE THE PREPRODUCTION ENGINE EMISSION CERTIFICATION LABEL REMOVED AND REPLACED WITH A
FSB 293-023
Feb 21, 2014
063000 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
Exhaust Gas Recirculation (EGR) Differential Pressure Sensor
FSB 293-024
Feb 21, 2014
060000 ENGINE (PWS)
"EXHAUST GAS RECIRCULATION (EGR) DIFFERENTIAL PRESSURE SENSOR. ON MACK VEHICLES EQUIPPED WITH A MACK MP8 ENGINE BUILT BETWEEN JANUARY 1, 2007 AND JANUARY 1, 2013 THAT REQUIRE THE REPLACEMENT OF THE EGR VENTURI TUBE OR AN EGR DIFFERENTIAL
FSB 313-005
Feb 18, 2014
111000 ELECTRICAL SYSTEM:12V/24V/48V BATTERY
CHANGES HAVE BEEN MADE TO THE STACKABLE 3 BATTERY BOX USED ON CERTAIN MACK GU MODEL CHASSIS? FROM 2010?2013. THIS WILL IMPROVE THE PROTECTION OF THE BATTERIES FROM THE ENVIRONMENT THEREFORE IMPROVING THE CONDITION OF THE BATTERY TERMINALS,
PI 0837
Feb 17, 2014
060000 ENGINE (PWS)
SOFTWARE UPDATES WITH ENHANCEMENTS ARE AVAILABLE FOR THE ENGINE CONTROL MODULE (ECM) FOR MACK MP7, MP8 AND MP10 ENGINES WITH US2014 EMISSION LEVEL ON VEHICLES BUILT BEFORE FEBRUARY 7, 2014. SOFTWARE UPDATES ADDRESS THE FOLLOWING. ? REGENERA
PI 0841
Feb 17, 2014
060000 ENGINE (PWS)
ON CERTAIN MACK CNG (COMPRESSED NATURAL GAS) MRU/LEU MODELS, BUILT BETWEEN 11/10/13 AND 2/14/14, MAY HAVE AN ACTIVE FAULT CODE MID 140 PID 247 FMI 9 AND THE ENGINE HOURS IN THE INSTRUMENT CLUSTER (MID140) MAY NOT MATCH WHAT IS IN THE ENGINE
FSB 561-024
Feb 11, 2014
350000 EQUIPMENT
ON LEU633 AND MRU633 MODELS BUILT BETWEEN MARCH 2012 AND AUGUST 2013 THE BRASS COLLAR THAT IS CRIMPED ONTO THE STAINLESS STEEL COMPRESSOR DISCHARGE LINE MAY SPLIT, RESULTING IN THE INABILITY OF THE UNIT TO BUILD AIR PRESSURE.