Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 2,701 bulletins for MACK
MC-QUALITYALERT2
Oct 17, 2012
160000 STRUCTURE
POTENTIAL INCOMPLETE FUSION BETWEEN DISC AND RIM AFFECTING TRACTOR APPLICATIONS
PI 0804
Oct 11, 2012
060000 ENGINE (PWS)
"AFTERTREATMENT SELECTIVE CATALYTIC REDUCTION, T-BOLT RETAINER ON THE SCR STRAP REQUIRES REPLACEMENT." REV
FSB-364-034
Oct 1, 2012
060000 ENGINE (PWS)
MACK TRUCK: WHILE DRIVING, AND FOOT BRAKE DEACTIVATES CRUISE CONTROL, ENGINE BRAKE FAILS TO FUNCTION PROPERLY UNTIL MANUALLY TURNED OFF AND THEN ON. MODELS CHU, CXU, GU, TD. NO MODELS YEARS LISTED. *PE
PI-0798
Oct 1, 2012
022400 SUSPENSION:REAR:SHOCK ABSORBER
MACK TRUCKS: INFORMATION ON REPLACEMENT PROCEDURES FOR THE SLACK ADJUSTER CONTROL ARM AND SUSPENSION SHOCK ABSORBER INTERFERENCE ON REAR/REAR DRIVE AXLE. MODEL GU. NO MODEL YEARS LISTED. *PE
EC-0014
Sep 1, 2012
060000 ENGINE (PWS)
MACK TRUCK: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. CERTAIN MODEL ENGINES, THE EMISSIONS LABEL ARE INCORRECT, NOT MEETING CALIFORNIA REQUIREMENTS, BUT ONLY MEETING US EPA EMISSION REQUIREMENTS. MODEL 2010-2012 MP7 AND MP8. *PE
FSB-255-024-03
Aug 1, 2012
061320 ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER
MACK: AN UNRELIABLE SIGNAL TO ENGINE VGT ACTUATOR FROM ENGINE VARIABLE GEOMETRY TURBOCHARGER (VGT) ACTUATOR HARNESS THAT HAS SEVERE FRETTING DAMAGE, THE CONNECTOR PIN AND SOCKET CONTACTS SHOULD BE REPLACED. *PE UPDATED 9/17/12.
FSB-371-043-1
Aug 1, 2012
114000 ELECTRICAL SYSTEM:WIRING
MACK TRUCK: DUE TO VEHICLE ELECTRONIC CONTROL UNIT (VECU) OUTPUT WIRE PT02, THE CIRCUIT CB7A IS IN WRONG CAVITY LOCATION, CAUSING PT02 (POWER TAKE OFF) FUNCTION NOT WORKING CORRECTLY. *PE
PI-0795
Aug 1, 2012
061200 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
MACK TRUCK: AFTERTREATMENT DIESEL PARTICULATE FILTER (DPF) INLET PIPE MAY POSSIBLY EXHIBIT AN EXHAUST LEAK. TO IMPROVE SEALING FUNCTION OF DPF INLET PIPE, THE DPF INLET PIPE FLANGE WAS MODIFIED. MODEL GU. MODEL YEARS 2011-12. *
PI-0796
Aug 1, 2012
063130 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)
MACK TRUCK: INFORMATION PROVIDED REGARDING MODIFICATION OF EGR VALVE ON ENGINES AND REMOVAL OF POPPET SHAFT END CAP O RINGS. MODELS CHU, CXU, GU, LEU, MRU. NO MODEL YEARS LISTED. *PE
PI-0801
Aug 1, 2012
091100 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY
MARCK TRUCK: INFORMATION REGARDING TWO UPPER HUCK BOLTS FOR FUEL TANK J BRACKET AND AFTERTREATMENT CONTROL MODULE (ACM). TO PROVIDE NECESSARY CLEARANCE, IF INTERFERENCE EXISTS, CUT OFF END OF HUCK BOLTS AND REMOVE ACM. MODELS GU. NO MO
FSB-258-033
Jul 1, 2012
061120 ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER
MACK TRUCKS: ENGINE TUBOCHARGER COMPRESSOR BYPASS VALVE, AIRLINE ROUTING. THIS DOCUMENT COVERS THE PROCEDURE FOR ROUTING THE FLEXIBLE AIR LINE AROUND THE FRONT OF THE ENGINE IF THE EXISTING STEEL AIR LINE FAIL. *JS
FSB-261-034
Jul 1, 2012
062100 ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY
MACK TRUCKS: RADIATOR TIE ROD BRACKET. THE RADIATOR TIE ROD BRACKET (LEFT SIDE) ON MACK LEU TRUCKS EQUIPPED WITH CUMMINS ISL-G NATURAL GAS ENGINES HAVE THE POTENTIAL RISK OF MAKING CONTACT WITH THE BOTTOM OF THE CAB. *JS
FSB-293-007
Jul 1, 2012
091130 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
MACK TRUCKS: EGR DIFFERENTIAL PRESSURE SENSOR PIN FRETTING. SEVERE FRETTING DAMAGE OF THE ENGINE EXHAUST GAS RECIRCULATION DIFFERENTIAL PRESSURE SENSOR'S (EGR DIFFERENTIAL PRESSURE SENSOR) CONNECTOR MAY CAUSE AN UNRELIABLE SIGNAL TO THE SEN
FSB-372-011
Jul 1, 2012
125000 EXTERIOR LIGHTING:BRAKE LIGHTS
MACK TRUCKS: FOUR WAY FLASHER ABS FAULT. CERTAIN VEHICLES EQUIPPED WITH A WEBB SOLID STATE FLASHER, BUILT FROM JAN. 1, 2010 TO JUNE 29, 2012 MAY EXPERIENCE AN ACTIVE ABS FAULT WHEN THE 4 WAY FLASHER IS ENABLED. *JS
PI0775
Jul 1, 2012
111000 ELECTRICAL SYSTEM:12V/24V/48V BATTERY
MACK TRUCKS: THE BATTERY DISCONNECT SWITCH MAY HAVE BEEN BYPASSED ON SOME VEHICLES. THE RIGHT HAND POSITIVE CABLE MAY HAVE BEEN ROUTED DIRECTLY TO THE STARTER AND NOT TO THE BATTERY DISCONNECT SWITCH. *JS UPATED 08/08/2012 *JS
PI-0781
Jun 1, 2012
060000 ENGINE (PWS)
MACK: DUE TO FRETTING OF CONNECTOR PINS IN ENGINE VGT ACTUATOR CONNECTOR, A NEW MOUNTING ARRANGEMENT HAS BEEN DEVELOPED AND RELOCATION OF ENGINE VGT ACTUATOR CONNECTOR. MODELS CHU, CXU, GU, MRU, MP8. *PE UPDATED 7/31/12.
PI-0784
Jun 1, 2012
060000 ENGINE (PWS)
MACK: RELOCATING VGT ACTUATOR CONNECTOR AND MOUNTING ARRANGEMENT TO ELIMINATE DIAGNOSTIC TROUBLE CODES (DTCS) AND SIGNAL MISSING FROM ENGINE VARIABLE GEOMETRY TURBOCHARGER ACTUATOR (ENGINE VGT ACTUATOR) CAUSING FRETTING OF CONNECTOR PINS.
PI-0787
Jun 1, 2012
103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
MACK: CERTAIN TRUCKS HAD O RING INSTALLED INCORRECTLY ON TRANSMISSION COOLER LINE FITTINGS DURING ASSEMBLY, THEREBY CAUSING FLUID FROM TRANSMISSION TO BE LOSS AND/OR DAMAGE TO TRANSMISSION, PREMATURELY. *PE UPDATED 7/31/12.
PI-0789
Jun 1, 2012
021231 SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION:LINES AND FITTINGS
MACK TRUCK: INFORMATION REGARDING THE SLEEPER CAB SUSPENSION LEVELING VALVE BRACKET THAT WAS INSTALLED INCORRECTLY. ALSO, THE SUPPORT BRACKET FOR AIR SPRING, INCORRECTLY MOUNTED ON FRAME, CAUSING CAB SHOCK TO EXTEND FULLY WHEN AIR SPRIN
PI-0790
Jun 1, 2012
071100 FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY
MACK TRUCK: INFORMATION REGARDING THE EXPANSION TANK COOLANT PIPE STATIC MAKING CONTACT WITH STARTER SOLENOID WIRE AND RUBBING THROUGH WIRE INSULATION. MODELS LEU AND MRU. *PE
FSB-234-014-1
May 1, 2012
091100 FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY
MACK: ON THE RIGHT SIDE OF TRUCK, IS THE MOUNTED STANCHION EXHAUST BRACKET AND FUEL VENT LINES, WHICH THE FUEL TANK VENTILATION FILTER IS ADDED. MODELS CHU, CXU, GU, TD, MP7, MP8, MP10, US07, US10. MODEL YEARS 2008-2012. *PE
FSB-437-002-01
May 1, 2012
060000 ENGINE (PWS)
MACK: WHERE THE TRANSMISSION AND/OR ENGINE SUPPORTS ARE ATTACHED, UNDER SEVERE OPERATING CONDITIONS, CRACKS HAVE BEEN LOCATED AND THE MOUNTING BRACKETS , WITH NEW FRAMES, SHOULD BE REPLACED. MODELS LEU, MRU, MP7. MODEL YEARS 2008-2012.