Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 2,701 bulletins for MACK
FSB-512-002
Nov 1, 2013
045000 SERVICE BRAKES, AIR:DISC
MACK: AIR DISC BRAKE EXPERIENCING THERMAL OVERLOAD CONDITION THAT OVER ADJUSTMENT OF NORMAL PAD WEAR COMPENSATION THAT MAINTAINS RUNNING CLEARANCE BETWEEN BRAKE PAD AND ROTOR AND REDUCES RUNNING CLEARANCE BELOW DESIRED LEVEL. MODEL CHU, C
PI-0834
Nov 1, 2013
061120 ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER
MACK: REPLACEMENT PROCEDURE REGARDING THE TURBOCHARGER OUTLET FLEX PIPE HAS A DURABILITY ISSUE AND WOULD TO BE REPLACED IN CERTAIN TRUCKS. 2013 LEU, MRU. *PE
PI 0833
Oct 29, 2013
030000 BRAKES (PWS)
SOME UNITS WITHOUT HAND CONTROL VALVES HAVE BEEN BUILT WITH A DOUBLE CHECK VALVE INSTALLED TO THE TPV. THIS IS A MISBUILD AND THE DOUBLE CHECK VALVE NEEDS TO BE REMOVED FOR PROPER OPERATION OF THE TRAILER BRAKE SYSTEM.
PI 0826
Oct 24, 2013
118000 ELECTRICAL SYSTEM:SOFTWARE
ECM AND ACM SOFTWARE UPDATES, SOFTWARE UPDATES WITH ENHANCEMENTS ARE AVAILABLE FOR THE ENGINE CONTROL MODULE (ECM) AND AFTERTREATMENT CONTROL MODULE (ACM) FOR VEHICLES BUILT FROM THE START OF OBD2013 PRODUCTION TO MAY 29, 2013.
PI 0831
Oct 24, 2013
118000 ELECTRICAL SYSTEM:SOFTWARE
ECM AND ACM SOFTWARE UPDATES, SOFTWARE UPDATES WITH ENHANCEMENTS ARE AVAILABLE FOR THE ENGINE CONTROL MODULE (ECM) AND AFTERTREATMENT CONTROL MODULE (ACM) FOR VEHICLES BUILT FROM MAY 30, 2013 TO OCTOBER 4, 2013.
SRA-M-13-04
Oct 24, 2013
010000 STEERING
MACK: SAFETY RECALL, ON CERTAIN TRUCKS, ON LOWER AND UPPER STEERING SHAFT PINCH BOLT THAT WAS NOT TORQUED TO SPECIFICATION AND STEERING SHAFT BECOMES LOOSE AND HAVE NO STEERING CONTROL. MODEL 2014 CXU, GU. *PE
PI 0825
Oct 22, 2013
060000 ENGINE (PWS)
CERTAIN MACK MRU MODELS, BUILT BETWEEN 10/12/12 AND 4/19/13, MAY HAVE AN UNSEALED SPLICE EXPOSED TO THE OUTSIDE ENVIRONMENT. THIS MAY ALLOW CORROSION TO OCCUR TO THE ENGINE CONTROL EMS SUPPLY, CIRCUITS F38A, F38A1, F38A2 AND F38A3.
PI-0825
Oct 13, 2013
060000 ENGINE (PWS)
MACK: SOME MACK MRU MODELS BUILT BETWEEN 10/12/12 AND 4/19/13 MAY HAVE UNSEALED SPLICE EXPOSED TO THE OUTSIDE ENVIRONMENT. IT IS POSSIBLE FOR THIS TO CAUSE CORROSION TO THE ENGINE CONTROL EMS SUPPLY, CIRCUITS F38A, F38A1, F38A2 AND F38A3 .
FSB 831-002
Oct 7, 2013
162300 STRUCTURE:BODY:DOOR
CERTAIN CHU, CXU, GU, AND TD VEHICLES MAY EXPERIENCE ISSUES WITH DOOR STOP BRACKET FAILURE DUE TO DOOR OVER EXTENSION.
FSB-284-047
Oct 1, 2013
114000 ELECTRICAL SYSTEM:WIRING
MACK: ON SOME TRUCKS, OIL CONTAMINATION INTO ENGINE WIRE HARNESS, MAY BE FROM OIL LEVEL SENSOR FAILURE AND AN ANTI WICKING PIGTAIL SPLICE KIT IS AVAILABLE. MODEL CHU, CXU, GU, LEU, MRU, TD. NO YEARS LISTED. *PE
FSB-831-002
Oct 1, 2013
162310 STRUCTURE:BODY:DOOR:HINGE AND ATTACHMENTS
MACK: THE DOOR STOP BRACKET WILL FAIL, ON SOME TRUCKS, DUE TO AN OVER EXTENSION OF DOOR, BUT A NEW DOOR DESIGN ASSEMBLY IS AVAILABLE. MODEL CHU, CXU, GU, TD. NO YEARS LISTED. *PE
PI-0833
Oct 1, 2013
042300 SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE
MACK: TRUCKS WITHOUT HAND CONTROL VALVES, WERE BUILT WITH DOUBLE CHECK VALVE INSTALLED TO TRACTOR PROTECTION VALVE (TPV) AND DUE TO MISBUILD, DOUBLE CHECK VALVE NEEDS REMOVING FOR PROPER OPERATION OF BRAKE SYSTEM. MODEL 2013 CHU, CXU GU.
PI 0828
Sep 24, 2013
118000 ELECTRICAL SYSTEM:SOFTWARE
SOFTWARE UPDATES WITH ENHANCEMENTS TO PEAK CYLINDER PRESSURE (PCP) BALANCE CAPABILITIES ARE AVAILABLE FOR THE ENGINE CONTROL MODULE (ECM) ON MACK TD VEHICLES EQUIPPED WITH MP10 ENGINE AND US07 EMISSIONS.
FSB 252-029
Sep 18, 2013
060000 ENGINE (PWS)
SOME MACK LEU AND MRU VEHICLES EQUIPPED WITH THE CUMMINS ISL-G ENGINE BUILT BEFORE SEPTEMBER 16, 2013 MAY EXPERIENCE AN ISSUE WITH THE MUFFLER INLET PIPE FALLING OUT OF THE MUFFLER.
FSB 284-046
Sep 16, 2013
075000 FUEL SYSTEM, GASOLINE:CARBURETOR SYSTEM
Instrument Cluster Reported Fuel Economy Calibration
FSB-284-044
Sep 1, 2013
060000 ENGINE (PWS)
MACK TRUCKS: UNDER CERTAIN CONDITIONS, SOME TRUCKS MAY HAVE EXPERIENCE REGENERATION SERVICE FAILURES, THAT INCLUDE HIGHER TURBOCHARGER WHEEL SPEED, HIGHER BOOST PRESSURE, HIGH ENGINE LOAD, UNEVEN ENGINE SPEED AND LOW T2 TEMPERATURES ON ENG
FSB-561-023
Sep 1, 2013
062300 ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS
MACK: FITTINGS FOR CURRENT AIR COMPRESSOR COOLANT HOSES ARE NOT THE SAME SIZE AT EACH END AND INCOMPATIBILITY OF HOSE INSIDE DIAMETER AND COMPRESSOR FITTING SIZE CAUSED COMPRESSOR HOSES TO COME LOOSE OR BLOW OUT AIR COMPRESSOR FITTINGS. M
PI-0828
Sep 1, 2013
060000 ENGINE (PWS)
MACK TRUCK: SOFTWARE UPDATE FOR THE ENGINE CONTROL MODULE (ECM) TO ENHANCE THE PEAK CYLINDER PRESSURE (PCP) BALANCE CAPABILITIES ON SO TRUCKS. MODEL TD. NO YEARS LISTED. *PE
FSB 413-002
Aug 29, 2013
100000 POWER TRAIN
THE AIR OPERATED CLUTCH ASSIST SYSTEM WAS DESIGNED TO REDUCE CLUTCH PEDAL EFFORT BY APPROXIMATELY 20%, ALONG WITH REDUCING THE CLUTCH PEDAL TRAVEL BY 2" (50.8 MM). THIS SYSTEM PROVIDES MORE LEG AND KNEE ROOM FOR THE OPERATOR AND INCREASES O
PI 0829
Aug 26, 2013
060000 ENGINE (PWS)
THE AFTERTREATMENT SELECTIVE CATALYTIC REDUCTION (SCR) OUTLET PIPE BAND CLAMPS AND HEAT SHIELD FASTENER ON CERTAIN MACK VEHICLES BUILT BETWEEN JUNE 28, 2013 AND JULY 23, 2013 WERE NOT TORQUED CORRECTLY.
FSB 293-022
Aug 21, 2013
060000 ENGINE (PWS)
IN THE EVENT THAT AN EGR TEMPERATURE SENSOR REPLACEMENT IS REQUIRED ON A MACK MP8 US2010 EMISSIONS ENGINE, A NEW ROUTING CONFIGURATION IS REQUIRED.