2009 Mack Gu TSBs
170 Technical Service Bulletins across 14 categories
Categories
Engine
40 bulletinsCBR: For vehicles equipped with an 11L engine, the plastic saddle bracket holding the a/c line on the left side of the...
Read full bulletin
engine may move excessively and rub the area where it secures the line.
Barksdale Leveling Valve, Leak Test
2009 Document reformatted to be published as a TSB in Impact.
Read full bulletin
Turbo Actuator Connector Repair.
2008 document reformated to be published as a TSB in Impact.
Read full bulletin
All CXU, CHU, GU, MRU's built with Volvo Engines and 07 Emissions. Cleaning Aftertreatment Fuel Injectors.
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
Manual Compression Test Adapter For Engines With Stainless Steel Injector Sleeves (Conical Tip Injectors) - US07 And...
Read full bulletin
Newer Emissions, Model Year 2008 And Newer
Mack Chassis - Diagnostic Trouble Codes ( DTC's ) - P020113, P020213, P020313, P020413, P020513, P020613, Cylinders 1...
Read full bulletin
Through 6 Injector A Open Circuit
On some MACK CHU, CXU, GU, and TD truck models built between 04/31/2008 and 11/30/2015, the solenoid valve for the grade...
Read full bulletin
gripper feature is prone to internal contamination in harsh environments. The internal contamination of the solenoid valve is caused by the buildup of grime, salt, road debris and other solid contaminants. In some cases, the buildup of solid contaminants caused the solenoid valve to malfunction. A similar malfunction is possible if the solenoid valve is equipped with a vent fitting that freezes over. The malfunction causes the trailer brake circuit to maintain trailer brake pressure after a grade gripper event. Replacement of the existing solenoid valve, elbow, and the addition of a new tube fitting and tube will ensure proper functionality of the grade gripper feature.
Reman Engine Label Replacement
Fuel Injector Offset Learning Diagnostic Trouble Codes ( DTC ) / Fault Codes Logged In Engine Control Module ( EMS );...
Read full bulletin
Possible Rough / Uneven Idle - OBD15 Chassis
Automated Manual Transmission ( AMT - F ) ( mDRIVE ) Clutch Valve Unit ( CVU ) Makes Intermittent Buzzing Noise With The...
Read full bulletin
Key On And Engine Off.Changed repair information to reflect new software available.
Engine Diagnostic Trouble Codes ( DTC's ) P24A0 And P249F Lighting The Malfunction Indicator Lamp ( MIL ) - OBD15...
Read full bulletin
(Commonly Model Year 2016) And Newer.Updated to reflect release of FSB284-064 (Above)
IN SOME INSTANCES THE EXHAUST ROCKER PISTON CAP SCREW MAY BECOME LOOSE AND BACK OUT CAUSING LOSS OF ENGINE COMPRESSION,...
Read full bulletin
OR A MECHANICAL INJECTOR DIAGNOSTIC TROUBLE CODE (DTC).
SOME MACK VEHICLES BUILT BETWEEN 2004 AND OCTOBER 2013 EXPERIENCE AN OIL LEVEL SENSOR FAILURE THAT LEADS TO OIL...
Read full bulletin
CONTAMINATION INTO THE ENGINE WIRE HARNESS.
SOME MACK VEHICLES BUILT BETWEEN 2004 AND OCTOBER 2013 EXPERIENCE AN OIL LEVEL SENSOR FAILURE THAT LEADS TO OIL...
Read full bulletin
CONTAMINATION INTO THE ENGINE WIRE HARNESS.
GRADE GRIPPER SOLENOID, REPLACEMENT.
Read full bulletin
ON SOME MACK CHU, CXU, GU, AND TD TRUCK MODELS BUILT BETWEEN 04/31/2008 AND 11/30/2015, THE SOLENOID VALVE FOR THE GRADE GRIPPER FEATURE IS PRONE TO INTERNAL CONTAMINATION IN HARSH ENVIRONMENTS. THE INTERNAL CONTAMINATION OF THE SOLENOID VALVE IS CAUSED BY THE BUILDUP OF GRIME, SALT, ROAD DEBRIS AND OTHER SOLID CONTAMINANTS. IN SOME CASES, THE BUILDUP OF SOLID CONTAMINANTS CAUSED THE SOLENOID VALVE TO MALFUNCTION. A SIMILAR MALFUNCTION IS POSSIBLE IF THE SOLENOID VALVE IS EQUIPPED WITH A VENT FITTING THAT FREEZES OVER. THE MALFUNCTION CAUSES THE TRAILER BRAKE CIRCUIT TO MAINTAIN TRAILER BRAKE PRESSURE AFTER A GRADE GRIPPER EVENT.
SOME MACK VEHICLES WITH MP ENGINES BUILT BETWEEN JANUARY 2004 AND JANUARY 2013 MAY EXPERIENCE A MAIN OIL GALLERY...
Read full bulletin
PRESSURE SENSOR OR PISTON COOLING JET PRESSURE SENSOR FAILURE THAT LEADS TO OIL CONTAMINATION INTO THE ENGINE WIRE HARNESS.
"GRADE GRIPPER SOLENOID, REPLACEMENT.
Read full bulletin
ON SOME MACK CHU, CXU, GU, AND TD TRUCK MODELS BUILT BETWEEN 04/31/2008 AND 05/12/2014, THE SOLENOID VALVE FOR THE GRADE GRIPPER FEATURE IS PRONE TO INTERNAL CONTAMINATION IN HARSH ENVIRONMENTS. THE INTERNAL CONTAMINATION OF THE SOLENOID VALVE IS CAUSED BY THE BUILDUP OF GRIME, SALT, ROAD DEBRIS AND OTHER SOLID CONTAMINANTS. IN SOME CASES, THE BUILD-UP OF SOLID CONTAMINANTS CAUSED THE SOLENOID VALVE TO MALFUNCTION. THE MALFUNCTION CAUSES THE TRAILER BRAKE CIRCUIT TO MAINTAIN TRAILER BRAKE PRESSURE AFTER A GRADE GRIPPER EVENT. REPLACEMENT OF THE EXISTING SOLENOID VALVE, ELBOW, AND THE ADDITION OF A NEW VENT WILL ENSURE PROPER FUNCTIONALITY OF THE GRADE GRIPPER FEATURE. "
ON SOME MACK CHU, CXU, GU, AND TD TRUCK MODELS BUILT BETWEEN 04/31/2008 AND 05/12/2014, THE SOLENOID VALVE FOR THE GRADE...
Read full bulletin
GRIPPER FEATURE IS PRONE TO INTERNAL CONTAMINATION IN HARSH ENVIRONMENTS. THE INTERNAL CONTAMINATION OF THE SOLENOID VALVE IS CAUSED BY THE BUILDUP OF GRIME, SALT, ROAD DEBRIS AND OTHER SOLID CONTAMINANTS. IN SOME CASES, THE BUILD-UP OF SOLID CONTAMINANTS CAUSED THE SOLENOID VALVE TO MALFUNCTION. THE MALFUNCTION CAUSES THE TRAILER BRAKE CIRCUIT TO MAINTAIN TRAILER BRAKE PRESSURE AFTER A GRADE GRIPPER EVENT.
GRADE GRIPPER SOLENOID, REPLACEMENT.
Read full bulletin
ON SOME MACK CHU, CXU, GU, AND TD TRUCK MODELS BUILT BETWEEN 04/31/2008 AND 05/11/2015, THE SOLENOID VALVE FOR THE GRADE GRIPPER FEATURE IS PRONE TO INTERNAL CONTAMINATION IN HARSH ENVIRONMENTS.
GRADE GRIPPER QUICK RELEASE VALVE, REPLACEMENT.
Read full bulletin
ON SOME MACK CHU, CXU, AND GU TRUCKS BUILT BETWEEN 04/31/2008 AND 01/05/2015, AND EQUIPPED WITH THE GRADE GRIPPER FUNCTION MAY EXPERIENCE A SLOW RELEASE OF THE TRAILERS SERVICE BRAKES. ADDITIONALLY, A DELAY IN THE RELEASE OF THE GRADE GRIPPER FUNCTION MAY BE CAUSED BY CERTAIN TRUCK OPTIONS AND TRAILER COMBINATIONS USED BY THE OPERATOR.
MACK TRUCK: DUE TO OIL CONTAMINATION INTO ENGINE WIRE HARNESS, MAIN OIL GALLERY PRESSURE SENSOR OR PISTON COOLING JET...
Read full bulletin
PRESSURE SENSOR HAS FAILED AND NEW ANTI WICKING JUMPER HARNESS IS AVAILABLE TO STOP OIL FROM WICKING BACK AND CAUSING DAMAGE TO NEW SENSOR. MODEL CHU, CXU, GU, LEU, MRU, TD. *PE
MACK: ON SOME TRUCKS, OIL CONTAMINATION INTO ENGINE WIRE HARNESS, MAY BE FROM OIL LEVEL SENSOR FAILURE AND AN ANTI...
Read full bulletin
WICKING PIGTAIL SPLICE KIT IS AVAILABLE. MODEL CHU, CXU, GU, LEU, MRU, TD. NO YEARS LISTED. *PE
MACK TRUCKS:DUE TO EXCESSIVE MOISTURE IN THE CLIMATE UNIT, SOME VEHICLES MAY DEVELOP A BLOWER MOTOR FAILURE.
Read full bulletin
*JS
MACK TRUCK: INFORMATION PROVIDED REGARDING MODIFICATION OF EGR VALVE ON ENGINES AND REMOVAL OF POPPET SHAFT END CAP O RINGS.
Read full bulletin
MODELS CHU, CXU, GU, LEU, MRU. NO MODEL YEARS LISTED. *PE
MACK TRUCKS: EGR DIFFERENTIAL PRESSURE SENSOR PIN FRETTING.
Read full bulletin
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 SENSOR ON MACK MP8 EPA2007 ENGINES. *JS
MACK TRUCKS: ENGINE TUBOCHARGER COMPRESSOR BYPASS VALVE, AIRLINE ROUTING.
Read full bulletin
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
MACK TRUCK: INFORMATION REGARDING THE SLEEPER CAB SUSPENSION LEVELING VALVE BRACKET THAT WAS INSTALLED INCORRECTLY.
Read full bulletin
ALSO, THE SUPPORT BRACKET FOR AIR SPRING, INCORRECTLY MOUNTED ON FRAME, CAUSING CAB SHOCK TO EXTEND FULLY WHEN AIR SPRING IS INFLATED. *PE
MACK: DUE TO FRETTING OF CONNECTOR PINS IN ENGINE VGT ACTUATOR CONNECTOR, A NEW MOUNTING ARRANGEMENT HAS BEEN...
Read full bulletin
DEVELOPED AND RELOCATION OF ENGINE VGT ACTUATOR CONNECTOR. MODELS CHU, CXU, GU, MRU, MP8. *PE UPDATED 7/31/12. *PE
MACK: AN UNRELIABLE SIGNAL TO ENGINE VGT ACTUATOR FROM ENGINE VARIABLE GEOMETRY TURBOCHARGER (VGT) ACTUATOR HARNESS...
Read full bulletin
THAT HAS SEVERE FRETTING DAMAGE, THE CONNECTOR PIN AND SOCKET CONTACTS SHOULD BE REPLACED. *PE UPDATED 9/17/12. *PE
MACK TRUCKS: SEVERE FRETTING DAMAGE OF THE ENGINE VARIABLE GEOMETRY TURBOCHARGER ACTUATOR (ENGINE VGT ACTUATOR) HARNESS...
Read full bulletin
AND TURBINE SHAFT SPEED SENSOR (TSS) CONNECTORS MAY CAUSE AN UNRELIABLE SIGNAL TO THE ENGINE VGT ACTUATOR. ALSO INCLUDED MODEL CMM AND CMH. NO MODEL YEARS GIVEN. *JS
MACK TRUCKS: THERE ARE ENGINE ECM SOFTWARE UPDATES.
Read full bulletin
*RM
MACK TRUCKS: THERE ARE FOUR MISSING BOLTS IN THE ENGINE FRAME AND MOUNT.
Read full bulletin
*RM UPDATED ON 4/22/2013. *KB
MACK TRUCKS: THERE IS A NEW THERMOSTAT SEAL AND COVER TO PREVENT COOLANT LEAKAGE.
Read full bulletin
*RM
MACK TRUCK: ENGINE ECM AND ACM SOFTWARE UPDATES.
Read full bulletin
ENHANCEMENTS ARE AVAILABLE FOR THE ENGINE CONTROL MODULE (ECM) AND AFTERTREATMENT CONTROL MODULE (ACM). DOES NOT APPLY TO MACK TRUCKS AUSTRALIA. MODELS MRU, LEU, GU, CHU, CXU. NO MODEL YEARS LISTED. *PE
MACK: LOW NOX IDLE, DOES NOT FUNCTION WITH HAND THROTTLE.
Read full bulletin
THE ELECTRONIC HAND THROTTLE ON CERTAIN CHU, CXU, GU AND TD MODEL CHASSIS WHEN ENGAGED, WILL OVERRIDE THE LOW NOX IDLE COMPLIANCE. A LIST OF AFFECTED CHASSIS HAS BEEN SENT TO ALL APPLICABLE DEALERS. *PE
MACK TRUCK: REPLACEMENT OF THE TURBOCHARGER AND MOUNTING HARDWARE ON CERTAIN MP8 ENGINE EQUIPPED TRUCKS.
Read full bulletin
THE TURBOCHARGER AND ASSOCIATED MOUNTING HARDWARE MUST BE CHANGED ON ALL TRUCKS INVOLVED IN THIS CAMPAIGN. *PE
Fuel System
25 bulletinsDEF 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
System Date And Time, Information; Diagnostic Tool ( J-Pro, Premium Tech Tool ( PTT ) ) Displays Incorrect Timestamp For...
Read full bulletin
Diagnostic Trouble Code ( DTC ) / Fault Code Occurrences, Possible Data Link Codes Present - US07 And Newer Emissions, Common Mod
Mack Chassis - Where To Find The Body Builder Portal - Body Builder Manual ( BBM ) Information - US04 And Newer...
Read full bulletin
Emissions, Model Year 2008 And Newer
Diesel Fuel Information - Acceptable Biodiesel, Fuel Blend For Summer And Winter - US07 And Newer Emissions, Model Year...
Read full bulletin
2008 And Newer
Mack Chassis - Disabling The Driver ID; Removing the Driver ID Prompt - US07 To US14+OBD16 Emissions, Model Years 2008...
Read full bulletin
To 2017
Diagnostic Trouble Code ( DTC ) P02FA Illuminating The Malfunction Indicator Lamp (MIL) - US17 (GHG17, Common Rail Fuel...
Read full bulletin
System) Chassis ONLY
Diagnostic Trouble Code ( DTC ) P0471 Illuminating The Malfunction Indicator Lamp (MIL) - US17 (GHG17, Common Rail Fuel...
Read full bulletin
System) Chassis ONLY
Diagnostic Trouble Code ( DTC ) P0420 Illuminating The Malfunction Indicator Lamp (MIL) - US17 (GHG17, Common Rail Fuel...
Read full bulletin
System) Chassis ONLY
Diagnostic Trouble Code ( DTC ) P009E - 73 - Fuel Pressure Relief Control Performance / Stuck Off - GHG17 ( US17 )...
Read full bulletin
Chassis With Common Rail Fuel System, Updated to reflect GHG17 software release
Diagnostic Trouble Code ( DTC ) P009E - 73 - Fuel Pressure Relief Control Performance / Stuck Off - GHG17 ( US17 )...
Read full bulletin
Chassis With Common Rail Fuel System.Changed repair instructions to reflect new procedures
Service Only Regen Requested With No Warning.
Read full bulletin
Diagnostic Trouble Codes ( DTC ) P24A4 / P10FE Active Or Inactive With Several Counts - OBD15 And OBD16 Conventional Chassis; Does Not Apply To US17 (Common Rail Fuel System) Chassis.Updated to reflect release of FSB284-064 (Above)
Mack Chassis - Diesel Exhaust Fluid ( DEF ) System Cleaning/Flush After A Pump Failure or System Contamination.Removed...
Read full bulletin
Tech Tip, Added correct operation ID
Expired - Refer to K93039325 - Mack Chassis - SNM16-032 DEF (Diesel Exhaust Fluid) Contamination In Diesel Fuel.New...
Read full bulletin
solution released with improved information
MACK TRUCK: TO INCREASED PROTECTION AGAINST FUEL INJECTOR TIP EROSION, A NEW FUEL TANK VENTILATION FILTER WAS...
Read full bulletin
IMPLEMENTED, AND MOUNTS ON OUTSIDE OF FRAME RAIL, USING FUEL TANK J BRACKET HUCK FASTENERS. MODEL CHU, CXU, GU, TD. *PE
MACK TRUCK: MOUNTED OUTSIDE OF FRAME RAIL, IS NEW FUEL TANK VENTILATION FILTER MOUNTING SLEEVE, USING FUEL TANK J...
Read full bulletin
BRACKET HUCK FASTENERS AND TO INCREASE PROTECTION AGAINST FUEL INJECTOR TIP EROSION. MODEL CHU, CXU, GU, TD. *PE
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.
Read full bulletin
MODELS CHU, CXU, GU, TD, MP7, MP8, MP10, US07, US10. MODEL YEARS 2008-2012. *PE
MACK TRUCK: THERE IS FUEL LEAKAGE AT TANDEM FUEL PUMP.
Read full bulletin
THE REPLACEMENT OF FUEL PUMP WILL NOT CORRECT WEEP HOLE LEAKAGE OF FLUID LEAK. CHP, CTP, CXP, CHU, CXU, GU, LEU, MRU, TD, CMM, CMH MODELS. *PE
MACK TRUCKS: THERE ARE NEW EGR OUTLET HOSE CLAMPS.
Read full bulletin
*RM
MACK: PROCEDURE TO FIX THE AN INSULATION BLANKET IN THE EXHAUST SYSTEM THAT CAN DETERIORATE OVER TIME.
Read full bulletin
*RM UPDATED 9/12/11. *PE
MACK: PROCEDURE TO FIX THE AN INSULATION BLANKET IN THE EXHAUST SYSTEM THAT CAN DETERIORATE OVER TIME.
Read full bulletin
*RM UPDATED 9/12/11. *PE
MACK: THE FUEL LEVEL SENDER IS INCORRECTLY INSTALLED AND CAN CAUSE INCORRECT FUEL LEVEL READINGS IN THE INSTRUMENT PANEL.
Read full bulletin
*RM UPDATED 9/27/2011. *PE
EXHAUST ROCKER ARM, COMBUSTION SEALING WASHER AND UNIT INJECTOR YOKE REPLACEMENT.
Read full bulletin
*PE
Other
22 bulletinsMack Trucks now offer an improved HD Inter-Axle Through Shaft for the CRD 125, 150, 180, and 200 family carriers.
Read full bulletin
The new HD shaft went into production on January 23rd, 2023 for 2.54 - 3.50 axle ratios and April 1st, 2023 for 3.56 - 3.98 ratios. The new HD through shaft is an upgrade over the current standard shaft and can now be used as a replacement part instead of the standard shaft. The new HD shaft has a new design to increase strength, longevity and life over the standard shaft.
Air Restriction Indicator
CBR: Diagnostic Trouble Code (DTC) P215A-64, Fault Code SPN 84 FMI 19
Vibration Diagnostics
2007 document reformatted to be published as a TSB in Impact.
Read full bulletin
Lateral cab movement bracket.
2008 Document reformatted to be published as a TSB in Impact.
Read full bulletin
Grille bar, replacment.
2008 Document reformatted to be published as a TSB in Impact.
Read full bulletin
Loose oil filter spud.
2008 Document reformatted to be published as a TSB in Impact.
Read full bulletin
Cooling system connections.
2008 Document reformated to be published as a TSB in Impact.
Read full bulletin
Torque rod interference.
2008 Document reformated to be published as a TSB in Impact.
Read full bulletin
Field repair for installing the grill.
2009 Document reformatted to be published as a TSB in Impact.
Read full bulletin
New Air Dryer
2009 Document reformatted to be published as a TSB in Impact.
Read full bulletin
Axle Carrier Pinion Angles
2008 document reformatted to be published as a TSB in Impact.
Read full bulletin
Fan Ring clearance for GU Model Truck.
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)
Volvo Chassis - FSB 237 - 020, Unit Injector Yoke Hold - Down Bolt Torque Specification
Mack Chassis - FSB 563-008 Plugs, Pressure Protection Manifold - New Brass Plugs For Noregon Pressure Protection...
Read full bulletin
Manifold (PPM)
SUMMARY TO BE PROVIDED ON A FUTURE DATE.
MACK TRUCKS: LOW OIL PRESSURE.
Read full bulletin
STORED DTC SPN 100 FMI 1, DURING LONG HARD PULL CONDITIONS. *JS
MACK TRUCKS: THE DIAGNOSTIC CONNECTOR MAY BECOME LOOSE.
Read full bulletin
INFORMATION ON REPLACEMENT OF THE DIAGNOSTIC RETAINER CLIP. *RM
Transmission
21 bulletinsCBR - Automated Manual Transmission ( AMT ) Flywheel Pilot Bearing Wear On Input Shaft.
2008 Document reformatted to be published as a TSB in Impact.
Read full bulletin
Two-Piece clutch brake.
Warranty Automated Manual Transmission ( AMT, I-Shift, mDrive ) Control Housing Assembly; Guidelines For Filing A Claim...
Read full bulletin
For Chassis Return Visit With Transmission Issues After A Repair Requiring Control Housing Removal And Reinstallation - US07 And N.
Automated Manual Transmission ( AMT ) I-Shift / mDRIVE - Ribbon Harness Replacement - Speed Sensor Bolts, Possible Fault...
Read full bulletin
Codes P1058 - 21 Or MID 130 PID 161 FMI 1
Mack Chassis - Vehicles Equipped With An Automated Manual Transmission Model F ( AMT-F, mDrive ), Premium Tech Tool (...
Read full bulletin
PTT ) Gearbox Calibration Failure; Gearbox Calibration Operation Stops And Fails At 33% When Run With Transmission Removed
Automated Manual Transmission (AMT) (Spigot Bearing) Input Shaft Repair Kit And Shim Kit, Part Number Information,...
Read full bulletin
Reference Guide - US07 And Newer Emissions, Model Year 2008 And Newer
Automated Manual Transmission Gearbox Will Not Shift To High Range After Gearbox Repair; MID 130 PSID 24 FMI 1, P1072-92...
Read full bulletin
Unintentional Disengagement Of High Range - US07 And Newer Emissions, Model Year 2008 And Newer
Clutch Pedal Micro Switch Replacement.
Transmission Oil Cooler Hose, Replacement
Expired - Refer To K45673535 - Mack Chassis SNM15-002b mDRIVE Transmission Service Strategy ( Revised failure mode...
Read full bulletin
descriptions )
Automated Manual Transmission Gearbox Will Not Shift To High Range After Gearbox Repair; MID 130 PSID 24 FMI 1, P1072-92...
Read full bulletin
Unintentional Disengagement Of High Range - US07 And Newer Emissions, Model Year 2008 And Newer
Certain GU trucks equipped with forward steer axles (18,000 lb rated front axles) and built before 2012, may experience...
Read full bulletin
issues with static steering while sitting still. There is not enough ability with a single steering gear to overcome certain turning frictions.
MACK TRUCKS: THE AIR ASSISTED CLUTCH CABLE ON SOME VEHICLES MAY FRAY AT THE CLEVIS.
Read full bulletin
*JS
MACK: CLUTCH OPERATION ERROR PREVENTS STARTER ENGAGEMENT UNLESS PEDAL IS FULLY DEPRESSED.
Read full bulletin
*RM
MACK TRUCKS: THE TRANSMISSION SHIFT INSTRUCTION LABEL HAS BEEN UPDATED.
Read full bulletin
*RM
MACK: THE ANTI-LOCK BRAKE SYSTEM HARNESS IS RUBBING AGAINST THE CLUTCH PEDAL WHICH CAN CAUSE THE ELECTRONIC MALFUNCTION LIGHT TO COME ON.
Read full bulletin
*RM
MACK TRUCK: THE OIL SLINGER THREADS ON THE INPUT SHAFT OF THE TRANSMISSION WERE THREADED INCORRECTLY AND COULD CAUSE LEAKAGE IN THE AREA.
Read full bulletin
*RM
MACK TRUCKS: THERE ARE NEW REVISED TORQUE PROCEDURES TO PREVENT THE BULL GEAR MOUNTING SCREWS FROM LOOSENING.
Read full bulletin
*RM
MACK TRUCK: REVISED AIR ASSIST CLUTCH CABLE.
Read full bulletin
EFFECTIVE 9/17/07, A REVISED AIR ASSIST CLUTCH CABLE (PART NO. 27RC410M) WAS IMPLEMENTED INTO PRODUCTION ON CXU, CHU, AND GU MODEL CHASSIS. NO MODEL YEARS LISTED. *PE
MACK TRUCK: AIR ASSIST CLUTCH CONVERSION.
Read full bulletin
AIR ASSIST TO NON ASSIST CLUTCH CABLE CONVERSION. 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" (50.8MM). NO MODEL YEARS LISTED. *PE
MACK TRUCK: THE TRANSMISSION OIL COOLER COOLANT SUPPLY PIPING ARRANGEMENT MAY PREVENT INSTALLATION OF A DRIVESHAFT TO AN...
Read full bulletin
ACCESSORY PUMP WITH THE TRANSMISSION MOUNTED PTO LOCATED IN THE 8 O'CLOCK POSITION. MODEL YEARS UNKNOWN. *PE
Electrical
19 bulletins2008 Document reformated to be published as a TSB in Impact.
Read full bulletin
Revised battery ti battery cable
2009 Document reformatted to be published as a TSB in Impact.
Read full bulletin
Daytime Running Lamp (DRL) Relay Block
(Back Office) - Cruise Control Inoperative After Updating Software VECU5 Without ESP Package (UESP).
Sensor And Parameter Value Monitor - Template Parameter List For Pre-OBD (9-Pin Diagnostic Connector) Chassis In Premium...
Read full bulletin
Tech Tool ( PTT ); Regeneration And Road Test Sensor Monitor Parameters - US07 And US10 Emissions, Model Years 2008 To 2013
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
Lighting Control Module ( LCM ) Replacement - Refer To Technical Parts Information ( TPI ) 364 - 034 Control Unit
Particulate Matter ( PM ) Sensor Diagnostic Trouble Codes ( DTC ) Illuminating The Malfunction Indicator Lamp ( MIL );...
Read full bulletin
Tech Tip TT-014-2016 - OBD16 And Newer Emissions (Commonly Model Year 2017, Includes Common Rail Fuel System Chassis), Rewritten to split emissions levels, reflect GHG17 software release
ECM and ACM Reprogramming, OBD2015
Mack Chassis - Aftertreatment Control Module ( ACM ) not visible in Premium Tech Tool ( PTT ).Added more checks and...
Read full bulletin
procedures
INSTRUMENT CLUSTER REPROGRAMMING, VEHICLE BUILT FROM JAN.
Read full bulletin
1, 2007 TO SEPT. 3, 2012, MAY EXPERIENCE AN INCREASE OF PARASITIC BATTERY DRAIN WITH KEY OFF.
CAB HARNESS INSULATION, INSTALLATION.
Read full bulletin
CAB WIRING HARNESS MAY EXPERIENCE CHAFING.
POWER WIRES, REROUTING, CERTAIN MACK CHU, CXU, GU, AND TD TRUCK MODELS BUILT BETWEEN 01/01/07 AND 10/22/13, UTILIZES TWO...
Read full bulletin
(RED) POWER WIRES THAT ROUTE FROM THE BUSSED ELECTRICAL CENTER (BEC) AND BEHIND THE RADIO. THE (RED) POWER WIRES COULD POSSIBLY CHAFE ON THE RADIO BRACKET.
MARCK TRUCK: INFORMATION REGARDING TWO UPPER HUCK BOLTS FOR FUEL TANK J BRACKET AND AFTERTREATMENT CONTROL MODULE (ACM).
Read full bulletin
TO PROVIDE NECESSARY CLEARANCE, IF INTERFERENCE EXISTS, CUT OFF END OF HUCK BOLTS AND REMOVE ACM. MODELS GU. NO MODEL YEARS LISTED. *PE
MACK: ON CERTAIN MACK VEHICLES BUILT BEFORE 2/13/2012, THE FRONT CHASSIS TO UREA TANK CONNECTION, LOCATED ON THE SIDE OF...
Read full bulletin
THE DEF TANK MAY RUB MOUNTING BRACKET OR NOT STAY SECURED. *JS
MACK TRUCKS: THE FUSE IDENTIFICATION DECAL IS BEING CORRECTED.
Read full bulletin
*RM
MACK TRUCKS: THE LOCATION OF THE NITROUS OXYDE SENSOR AND PIPING AROUND IT HAS BEEN CHANGED TO PROTECT IT FROM MOISTURE...
Read full bulletin
DAMAGE IF WATER ENTERS THE EXHAUST. *RM
Suspension
10 bulletins2008 Document reformatted to be published as a TSB in Impact.
Read full bulletin
Air suspension ride height.
Electronically Controlled Suspension (ECS) Losing Air Pressure
Mack Chassis - Front Hub With Unit-Bearings ( Unitized Wheel Bearings ), Inspection Information And Guidelines -...
Read full bulletin
Commonly Model Year 2008 And Newer
MACK TRUCKS: REAR SUSPENSION HARDWARE TORQUE.
Read full bulletin
BOLTS ARE LOOSE OR INCORRECTLY TORQUED ON THE PRIMAAX SUSPENSION. *JS UPDATED 07/18/2013 *JS
MACK TRUCKS: REAR SUSPENSION ADJUSTMENT WASHERS.
Read full bulletin
REPLACEMENT OF THE SUSPENSION ADJUSTMENT WASHERS IS REQUIRED. *JS
MACK TRUCKS: SLACK ADJUSTER CONTROL ARM.
Read full bulletin
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 ARTICULATION. *JS UPDATED 06/28/13. *PE UPDATED 12/19/13. *PE UPDATED 08/09/2014 *JS
MACK: DURING EXTREME DOWNWARD ARTICULATION OF REAR AXLE, THE AIR SPRING MAY SEPARATE AT MOUNTING BELL.
Read full bulletin
*PE
MACK TRUCKS: FRAME FLANGE CONTACTING SUSPENSION CROSSMEMBER.
Read full bulletin
CERTAIN MACK MODELS MAY HAVE CONTACT ISSUES BETWEEN THE FRAME RAILS AND CROSS MEMBER. THIS CONTACT CAN CAUSE A SIDE LOADING CONDITION TO THE FRAME. *JS
MACK TRUCK: BROKEN LONGITUDINAL TORQUE ROD MOUNTING STUD IN AXLE SPRING SEAT DUE TO WING BRACKET INTERFERENCE.
Read full bulletin
THIS INCLUDES THE TD MODEL. NO MODEL YEARS LISTED. *PE
MACK TRUCK: REVISED FAN HUB MOUNTING BOLT TORQUE.
Read full bulletin
FOR THIS APPLICATION ONLY, THE FAN HUB MOUNTING STUD MATERIAL PROPERTIES AND LENGTH HAVE BEEN CHANGED TO 45MM (WAS 40MM) TO ENSURE FULL NUT ENGAGEMENT. MODEL YEARS UNKNOWN. *PE
Software & Calibration
7 bulletinsMack Chassis - Bendix Vendor Configuration Program ( VCP ) Software Download Information
Mack Chassis - Diagnostic Trouble Code ( DTC ) P0128, Diagnostic And Repair - US14+OBD13 (Commonly Year Model 2015) And...
Read full bulletin
Newer.Updated to reflect release of FSB284-064 (Above)
MACK TRUCK: FLASHERS ARE TO BE REMOVED DUE TO DURABILITY ISSUES.
Read full bulletin
*JS
MACK: TORQUE ROD REPLACEMENT ON FRONT REAR AXLE.
Read full bulletin
*JS UPDATED 5/9/12. *PE
MACK TRUCKS: THERE ARE CRACKS IN A STEEL OIL TUBE THAT CAN LEAD TO LEAKING.
Read full bulletin
*RM UPDATED 2/21/12. *PE
MACK TRUCK: THERE IS A SOFTWARE UPDATE.
Read full bulletin
*RM
MACK: FAN RINGS ARE CRACKING DURING EXTREME SERVICE.
Read full bulletin
*RM UPDATED 9/7/11. *PE
Body & Paint
6 bulletins2008 Document reformatted to be published as a TSB in Impact.
Read full bulletin
Paint protection.
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.
Read full bulletin
MODEL CHU, CXU, GU, TD. NO YEARS LISTED. *PE
MACK TRUCK: PASSENGER DOOR PEEP WINDOW IS LOOSENING FROM DOOR.
Read full bulletin
THIS MAY RESULT IN THE WINDOW BUTYL TAPE SOFTENING BECAUSE OF HIGH TEMPERATURES. *PE
MACK TRUCK: CAB/DASHBOARD PANEL CRACKS MAY FORM DUE TO EXCESSIVE CAB FLEXING DURING EXTREME USE OF THE TRUCKS.
Read full bulletin
*RM
MACK TRUCK: REAR TRIM PANEL WEAR PLATE, INSTALLATION.
Read full bulletin
MODEL CHASSIS EQUIPPED WITH HIGH BACK OR MID BACK SEATS, THE SEAT BACK CAN RUB AND WEAR THROUGH THE REAR TRIM PANEL. DOES NOT APPLY TO CHASSIS EQUIPPED WITH SEARS BRAD SEATS. MODELS CH, CL, CV, CX AND GU. NO MODEL YEARS LISTED. *PE
MACK TRUCK: WINDSHIELD INSTALLATION (ROPE-PULL METHOD)-CXU, CHU, GU, CXP, CTP, CXN, CHN, CX, CH, CT, CV AND CL MODELS.
Read full bulletin
MACK TRUCKS NOW USES A ROPE PULL WINDSHIELD GLASS INSTALLATION METHOD ON CURRENT PRODUCTION CONVENTIONAL MODELS. THIS PROCEDURE, WHICH HAS BEEN USED SUCCESSFULLY IN EUROPE FOR A NUMBER OF YEARS, WILL SIMPLIFY SERVICE PROCEDURES WHILE AT THE SAME TIME ENSURING A LEAK FREE FIT. *PE
Brakes
5 bulletinsCBR - Active "Set Park Brake" Message On Drivers Information Display (DID).
INTERFERENCE BETWEEN THE BRAKE LINING AND THE SPRING CAP WAS DISCOVERED ON SOME MACK CHU, CXU, GU, TD, LEU, MRU TRUCKS...
Read full bulletin
EQUIPPED WITH 203 MM (8 IN) REAR DRUM BRAKES AND CAMELBACK REAR SUSPENSION.
MACK TRUCKS: FOUR WAY FLASHER ABS FAULT.
Read full bulletin
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
MACK TRUCK: CHASSIS WIRING HARNESS, ACB SENSOR, REPLACEMENT.
Read full bulletin
THIS BULLETIN CONTAINS INFORMATION FOR THE REPLACEMENT OF THE ADAPTIVE CRUISE WITH BRAKING (ACB) SENSOR CHASSIS OVERLAY WIRING HARNESS, FOUND ON CXU, CHU, GU AND TD MODEL MACK TRUCKS. NO MODEL YEARS LISTED. *PE
MACK TRUCK: SENSOR, ADAPTIVE CRUISE WITH BRAKING (ACB), ALIGNMENT.
Read full bulletin
THIS BULLETIN CONTAINS INFORMATION FOR CHECKING THE ALIGNMENT AND ADJUSTING THE ADAPTIVE CRUISE WITH BRAKING (ACB) SENSOR FOUND ON CXU, CHU, GU AND TD MODEL MACK TRUCKS. NO MODEL YEARS LISTED. *PE
Lighting
5 bulletinsTSB-Charge Air Cooler t-clamp install.
Mack Chassis - Diagnostic Trouble Code ( DTC ) P226C Intermittently Lighting The Malfunction Indicator Lamp ( MIL ) -...
Read full bulletin
OBD15 And OBD16 Conventional Chassis.Updated to reflect release of FSB284-064 (Above)
Diagnostic Trouble Code ( DTC ) P249C Intermittently Lighting The Malfunction Indicator Lamp ( MIL ) - OBD15 And OBD16,...
Read full bulletin
Model Year ( MY ) 2016 and 2017 Chassis.Updated to reflect release of FSB284-064 (Above)
Diagnostic Trouble Code ( DTC ) P0422 Lighting The Malfunction Indicator Light ( MIL ) - OBD15 And OBD16 Chassis...
Read full bulletin
(Non-Common Rail).Updated to reflect release of FSB284-064 (Above)
MACK TRUCKS: TORQUE ROD TO MOUNTING BRACKET BOLTS WERE INSTALLED INCORRECTLY.
Read full bulletin
THE BOLTS WERE INSTALLED IN AN OPPOSING MANNER. *RM
Tires & Wheels
3 bulletinsFlywheel Housing Thread Repair
MACK TRUCK: THE GRADE GRIPPER FEATURE, ON SOME TRUCKS, ARE PRONE TO HARSH ENVIRONMENTS WITH INTERNAL CONTAMINATION,...
Read full bulletin
CAUSED BY BUILD UP OF GRIME, SALT, ROAD DEBRIS AND OTHER CONTAMINANTS. MODEL CHU, CXU, GU, TD. *PE
MACK TRUCKS: OIL SEEPAGE AT FLYWHEEL HOUSING.
Read full bulletin
THIS PROBLEM HAS ALREADY BEEN SOLVED IN PRODUCTION, BUT THE PRODUCTION SOLUTION IS NOT COMPATIBLE WITH PREVIOUS GENERATION FLYWHEEL HOUSINGS. *JS
HVAC & Climate
3 bulletins2008 Document reformatted to be published as a TSB in Impact.
Read full bulletin
HVAC fine particulate filter.
MACK: FITTINGS FOR CURRENT AIR COMPRESSOR COOLANT HOSES ARE NOT THE SAME SIZE AT EACH END AND INCOMPATIBILITY OF HOSE...
Read full bulletin
INSIDE DIAMETER AND COMPRESSOR FITTING SIZE CAUSED COMPRESSOR HOSES TO COME LOOSE OR BLOW OUT AIR COMPRESSOR FITTINGS. MODEL 2009-2013 GU7, GU8, MP8. *PE
MACK TRUCK: FINE PARTICULATE FILTER FOR HVAC UNITS-CXU, CHU, GU, CXP AND CTP MODELS.
Read full bulletin
A PLEATED FINE PARTICULATE HVAC FILTER (PART NO. 85112361) HAS BEEN DEVELOPED FOR THE HVAC UNITS IN CERTAIN MODELS. NO MODEL YEARS LISTED. *PE
Pre-Delivery & Maintenance
2 bulletinsCBR: eWarranty To UCHP Labor Code ( SCC Code ) Crossover, Conversion Information For Use With Campaigns ( FI, PI ) And...
Read full bulletin
Recalls ( EC, SC ), Location On Trucks Dealer Portal ( TDP )
Stock Vehicle Storage and Maintenance
Infotainment
2 bulletinsInstrument Cluster Programming - Programming Fails Or Errors Display When Replacing An Instrument Cluster With A Newer...
Read full bulletin
Part Number (Conversion Kit) - US04 To US10 Chassis (9-Pin Diagnostic Connector)
Mack Chassis - Replacement / Upgrade Of The Programmable Global Audio ( GLAD ) Radio With A Non-programmable Radio