Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 2,701 bulletins for MACK
FSB 375-012
Aug 19, 2014
111000 ELECTRICAL SYSTEM:12V/24V/48V BATTERY
BATTERY PROTECTION SYSTEM (LVD) RELAY ON CERTAIN MACK TRUCKS BUILT FROM 01/01/2010 TO 06/13/2014 WITH THE LIFEGUARD BATTERY PROTECTION SYSTEM (LVD), THE LVD RELAY MAY NOT TURN THE LOADS BACK ON WHEN THE ?HIGH? VOLTAGE THRESHOLD IS MET. THIS
PI 0845
Aug 7, 2014
020000 SUSPENSION
ON CERTAIN MACK MODELS, BUILT BETWEEN 09/08/2011 AND 05/09/2013, WITH PID CODE 3230002 ENGINE, THERE WILL BE NO ROAD SPEED LIMIT, WARNING LIGHT OR BUZZER WHEN THE SUSPENSION IS LEFT DUMPED. THIS IS DUE TO THE FACT THAT THE SOFTWARE IN THE V
FSB-375-012
Aug 1, 2014
111000 ELECTRICAL SYSTEM:12V/24V/48V BATTERY
MACK: WHEN THRESHOLD OF HIGH VOLTAGE HAS BEEN MET, THE LIFEGUARD BATTERY PROTECTION SYSTEM (LVD) RELAY MAY NOT TURN LOADS BACK ON, DUE TO AN ASSEMBLY ERROR AT SUPPLIER. MODEL 2010-2014 CHU, CXU. *PE
FSB-511-002
Aug 1, 2014
034420 SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DRUM:SHOES/LININGS
MACK: THE PROTRUSION OF BRAKE SHOES BEYOND BRAKE DRUM IS BEING REPLACED WITH NEW 152MM (6.0 IN) BRAKES SHOES, 178 MM (7.,0 IN) WIDE BRAKE DRUMS ON SOME TRUCKS. MODEL 2011-2014 CHU, CXU, GU, TD. *PE
FSB-511-009
Aug 1, 2014
034420 SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DRUM:SHOES/LININGS
MACK: BRAKE SHOES PROTRUDES BEYOND BRAKE DRUM AND CAN BE RESOLVED BY INSTALLING BRAKE SHOES 152MM (6.0 IN) AND WIDE BRAKE DRUMS 18MM (7.0 IN). MODEL 2011-2014 CHU, CXU, GU, TD. *PE
PI-364-845
Aug 1, 2014
060000 ENGINE (PWS)
MACK: WHEN SUSPENSION, ON SOME TRUCKS, IS LEFT DUMPED, THERE ARE NO WARNING LIGHT, BUZZER OR ROAD SPEED LIMIT, DUE TO VEHICLE ELECTRONIC CONTROL UNIT (VECU) SOFTWARE FAILS TO SUPPORT VENDOR ENGINES REGARDING THIS FUNCTION. MODEL GU, CXU.
FSB 293-026
Jul 21, 2014
060000 ENGINE (PWS)
"EXHAUST GAS RECIRCULATION (EGR) DIFFERENTIAL PRESSURE SENSOR. ON MACK VEHICLES EQUIPPED WITH A MACK MP10 ENGINE BUILT BETWEEN JANUARY 1, 2007 AND JANUARY 1, 2013 THAT REQUIRE THE REPLACEMENT OF THE EGR VENTURI TUBE OR AN EGR DIFFERENTIAL
PI 0836
Jul 17, 2014
060000 ENGINE (PWS)
CRD 150/151 CARRIER INSPECTION COVER, REPLACEMENT, A MANUFACTURING DEFECT HAS BEEN IDENTIFIED AFFECTING CARRIERS BUILT FROM DECEMBER 2012 THROUGH JANUARY 2013. THE ISSUE IS MOLDING FLASH THAT MAY BE EXTENDING INTO THE O-RING GROOVE AT THE 1
PI 0847
Jul 8, 2014
091200 FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM
FUEL MANAGEMENT MODULE, REPLACEMENT. ON CERTAIN MACK LNG (LIQUID NATURAL GAS) MODELS, BUILT BETWEEN 08/01/2013 AND 05/09/2014, THE LOW FUEL WARNING MAY COME ON TOO EARLY. IN ADDITION THE FUEL GAUGE MAY SHOW FULL IF THE FUEL LEVEL SENSOR S
FSB-293-024
Jul 1, 2014
060000 ENGINE (PWS)
MACK: SOME VEHICLES REQUIRE THE REPLACEMENT OF THE EXHAUST GAS RECIRCULATION (EGR) DIFFERENTIAL PRESSURE SENSOR. THE KIT TO UPDATE THE SYSTEM WILL CONTAIN THE NEW TYPE OF SENSOR AND A CRIMPED IN PIGTAIL. APPLIES TO MACK VEHICLES BUILT BETW
FSB-293-026
Jul 1, 2014
063130 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)
MACK: TO UPDATE SYSTEM TO CURRENT LEVELS, THE EGR VENTURI TUBE OR EGR DIFFERENTIAL PRESSURE SENSOR SHOULD BE REPLACED. *PE
PI-0847
Jul 1, 2014
091200 FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM
MACK: SOFTWARE IN FUEL MANAGEMENT MODULE (FMM) HAD INCORRECT CALIBRATION AND OPEN CIRCUIT FAULT CRITERIA, CAUSING LOW FUEL WARNING TO COME ON TOO SOON AND SHOWED FULL WHEN FUEL LEVEL SENSOR SIGNAL BECAME OPEN. *PE
PI 0851
Jun 23, 2014
060000 ENGINE (PWS)
MACK TRUCKS HAS AUTHORIZED REPLACEMENT OF THE EGR COOLER COOLANT RETURN HOSE ON VEHICLES BUILT BETWEEN 01/01/2010 AND 05/16/2014 WITH MACK MP10 US2010 OR MP10 US2014 ENGINES. APPROXIMATELY 302 VEHICLES ARE INVOLVED IN THIS CAMPAIGN. THE EGR
PI 0848
Jun 18, 2014
060000 ENGINE (PWS)
ON CERTAIN MACK CXU MODELS EQUIPPED WITH COMPRESSED NATURAL GAS (CNG) ENGINES, BUILT BETWEEN 07/01/2013 AND 12/30/2013, THERE MAY BE MISSING WIRE SEALS IN THE HARNESS THAT CONNECT THE CHASSIS TO THE TANK. THIS COULD CAUSE CORROSION IN CONNE
FSB 234-018
Jun 2, 2014
070000 FUEL SYSTEM, GASOLINE
MACK TRUCKS HAS INTRODUCED A NEW FUEL TANK VENTILATION FILTER MOUNTING SLEEVE (PART NUMBER 21043123) THAT MOUNTS ON THE OUTSIDE OF THE FRAME RAIL USING THE FUEL TANK J BRACKET HUCK FASTENERS. THE FUEL TANK VENT FILTER HAS BEEN IMPLEMENTED F
FSB-234-018
Jun 1, 2014
091100 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY
MACK TRUCK: TO INCREASED PROTECTION AGAINST FUEL INJECTOR TIP EROSION, A NEW FUEL TANK VENTILATION FILTER WAS IMPLEMENTED, AND MOUNTS ON OUTSIDE OF FRAME RAIL, USING FUEL TANK J BRACKET HUCK FASTENERS. MODEL CHU, CXU, GU, TD.
FSB-234-019
Jun 1, 2014
071210 FUEL SYSTEM, GASOLINE:STORAGE:AUXILLARY TANK:SELECTOR DEVICES
MACK TRUCK: MOUNTED OUTSIDE OF FRAME RAIL, IS NEW FUEL TANK VENTILATION FILTER MOUNTING SLEEVE, USING FUEL TANK J BRACKET HUCK FASTENERS AND TO INCREASE PROTECTION AGAINST FUEL INJECTOR TIP EROSION. MODEL CHU, CXU, GU, TD. *PE
PI-0848
Jun 1, 2014
072200 FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
MACK TRUCK: IN THE WIRE HARNESS THAT CONNECTS THE CHASSIS TO TANK, SOME WIRE SEALS MAY BE MISSING, AND CAN CAUSE CORROSION AT CONNECTIONS. MODEL CXU. *PE
PI 0849
May 14, 2014
020000 SUSPENSION
THE FRONT AXLE U-BOLT WEDGES WERE INSTALLED INCORRECTLY ON SOME MACK CHU TRUCKS BUILT BETWEEN 11/11/2013 AND 02/24/2014. THE INCORRECT INSTALLATION OF THE WEDGE CAUSED THE UBOLTS TO BEND ON THE FRONT AXLE.
PI 0850
May 14, 2014
021244 SUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY:U-BOLT, LEAF SPRING TO AXLE
THE FRONT AXLE U-BOLT WEDGES WERE INSTALLED INCORRECTLY ON SOME MACK CHU TRUCKS BUILT BETWEEN 11/11/2013 AND 02/24/2014. THE INCORRECT INSTALLATION OF THE WEDGE CAUSED THE UBOLTS TO BEND ON THE FRONT AXLE.
FSB 254-006
May 8, 2014
350000 EQUIPMENT
A COALESCING AIR FILTER KIT HAS BEEN DEVELOPED TO IMPROVE THE EXPECTED LIFE OF THE ATOMIZATION MODULE IN SPARK ASSISTED DIESEL PARTICULATE FILTER SYSTEMS USED IN US2010 MRU AND LEU CHASSIS.
FSB 215-001
May 1, 2014
060000 ENGINE (PWS)
If an intake rocker fails on a vehicle built from April 2013 to August 2013, all six intake rockers must be replaced along with the failed camshaft
FSB-252-029
May 1, 2014
063200 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
MACK TRUCK: MUFFLER INLET PIPE WILL FALL OUT, AND A NEW MUFFLER INLET PIPE, TURBORCHARGER OUTLET PIPE, LENGTHENED EXHAUST FLEX PIPE WAS DESIGNED TO ADDRESS THIS CONDITION AND WORK TOGETHER TO REDUCE RIGIDITY. *PE
FSB-593-013
May 1, 2014
350000 EQUIPMENT
MACK TRUCK: THE GRADE GRIPPER FEATURE, ON SOME TRUCKS, ARE PRONE TO HARSH ENVIRONMENTS WITH INTERNAL CONTAMINATION, CAUSED BY BUILD UP OF GRIME, SALT, ROAD DEBRIS AND OTHER CONTAMINANTS. MODEL CHU, CXU, GU, TD. *PE