2014 Mack Gu TSBs

engine may move excessively and rub the area where it secures the line.

(FC) MID 140 PSID 239 FMI 12 Data Link, MID 142 Faulty Device or Component Logging, Possibly Following Engine Start.

Turbo Actuator Connector Repair.

Transmission Input Shaft Seal Or Output Shaft Seal - US10 And Newer Emissions, Common Model Years 2010 And Newer.

Newer Emissions, Model Year 2008 And Newer

Through 6 Injector A Open Circuit

Leakage From Transmission Input Shaft Seal Or Output Shaft Seal - US10 And Newer Emissions, Common Model Years 2010 And Newer

Bulletin M-257 - 006 - US14 And US15 Emissions

During Skip Shifting

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.

P0257-00, P2A17-00, Or P2A1F-00, Possible Lack Of Power - US17+OBD16 and Newer Emissions

Leakage From Transmission Input Shaft Seal Or Output Shaft Seal - US10 And Newer Emissions, Common Model Years 2010 And Newer

Possible Rough / Uneven Idle - OBD15 Chassis

Key On And Engine Off.Changed repair information to reflect new software available.

(Commonly Model Year 2016) And Newer.Updated to reflect release of FSB284-064 (Above)

EM-USA14, and EM-USA17), will require a new torque specification for the Unit Injector Yoke Hold-Down Bolt. Effective immediately, the torque value in step 4 has changed to 25 +5/-0 Nm (18 +4/-0 ft-lb).

model engine may be equipped with an improperly functioning on-board emission-related diagnostic system.

Check the Engine ECU Dataset 2 part number and compare to the chart below.

EM-USA14, and EM-USA17), will require a new torque specification for the Unit Injector Yoke Hold-Down Bolt.

OR A MECHANICAL INJECTOR DIAGNOSTIC TROUBLE CODE (DTC).

CONTAMINATION INTO THE ENGINE WIRE HARNESS.

GU, LEU AND MRU VEHICLES BUILT BETWEEN JANUARY 1, 2010 AND CURRENT PRODUCTION WITH MP7 EPA2010 AND OBD2013 ENGINES.

CONTAMINATION INTO THE ENGINE WIRE HARNESS.

THIS IS A MISBUILD AND THE DOUBLE CHECK VALVE NEEDS TO BE REMOVED FOR PROPER OPERATION OF THE TRAILER BRAKE SYSTEM.

(ACM) FOR VEHICLES BUILT FROM THE START OF OBD2013 PRODUCTION TO MAY 29, 2013.

(ACM) FOR VEHICLES BUILT FROM MAY 30, 2013 TO OCTOBER 4, 2013.

CONDITION, CLUTCH PEDAL FULLY DEPRESSED FEATURE AND HAS A RELAY CENTER ELECTRONIC POWER DISTRIBUTION MODULE (EPDM) GASKET (PART NUMBER 82732384) INSTALLED, MAY EXPERIENCE INTERFERENCE BETWEEN THE CLUTCH PEDAL MICRO SWITCH AND EPDM GASKET.

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.

PRESSURE SENSOR OR PISTON COOLING JET PRESSURE SENSOR FAILURE THAT LEADS TO OIL CONTAMINATION INTO THE ENGINE WIRE HARNESS.

CERTAIN MACK GU VEHICLES BUILT BETWEEN DECEMBER, 2012 AND AUGUST 2015, WITH CUMMINS ISL ENGINE, SERIAL NUMBER 73881385 AND LESS, MAY EXPERIENCE INCOMPLETE DIAGNOSTIC TROUBLE CODES (DTC) INFORMATION DISPLAYED ON THE INSTRUMENT CLUSTER IF TWO OR MORE ARE ACTIVE SIMULTANEOUSLY. CUMMINS ENGINE ECM CALIBRATION TRANSFER FROM ELECTRONIC SYSTEMS DATABASE AND NETWORK (ESDN) USING INSITE IS REQUIRED TO CORRECT THIS ISSUE. REFER TO THE INSITE USER'S MANUAL.

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. "

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.

FROM DECEMBER 2012 THROUGH JANUARY 2013. THE ISSUE IS MOLDING FLASH THAT MAY BE EXTENDING INTO THE O-RING GROOVE AT THE 12 AND 6 O'CLOCK POSITIONS OF THE COMPOSITE SIDE COVER. THIS FLASH MAY CUT INTO THE O-RING AND CAUSE IT TO DISTORT AND RESULTING IN OIL LEAKAGE. IT IS RECOMMENDED THAT THE COVER BE REPLACED TO CORRECT THIS CONDITION.

AFTERTREATMENT CONTROL MODULE (ACM) FOR VEHICLES BUILT FROM MAY 30, 2013 TO OCTOBER 4, 2013.

AFTERTREATMENT CONTROL MODULE (ACM) FOR VEHICLES BUILT FROM THE START OF OBD2013 PRODUCTION TO MAY 29, 2013.

SOFTWARE UPDATES WITH ENHANCEMENTS ARE AVAILABLE FOR THE ENGINE CONTROL MODULE (ECM) AND AFTERTREATMENT CONTROL MODULE (ACM) FOR MACK MP7, MP8 AND MP10 ENGINES ON OBD2013 VEHICLES BUILT FROM FEBRUARY 1, 2013 TO FEBRUARY 6, 2014.

CHECK THE ENGINE ECU DATASET 2 PART NUMBER AND COMPARE TO THE CHART BELOW.

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.

SPEED LIMIT, WARNING LIGHT OR BUZZER WHEN THE SUSPENSION IS LEFT DUMPED. THIS IS DUE TO THE FACT THAT THE SOFTWARE IN THE VECU DID NOT SUPPORT VENDOR ENGINES FOR THIS FUNCTION.

CERTAIN MACK TRUCKS EQUIPPED WITH A CUMMINS DIESEL ENGINE AND BUILT BETWEEN DECEMBER 3, 2012 AND SEPTEMBER 25, 2015 MAY DISPLAY DIAGNOSTIC TROUBLE CODE (DTC) SPN 3494 WAIT TO START IN THE ENGINE CONTROL MODULE (ECM). ADDITIONALLY, THE WAIT TO START INDICATOR LAMP MAY ILLUMINATE DIMLY, CAUSING POOR VISIBILITY OF THE INDICATOR LAMP.

FAULTS: P113F-12, BUFFERED IDLE VALIDATION SWITCH WIRE VECU SIDE, CIRCUIT SHORT TO BATTERY. P113F-11, BUFFERED IDLE VALIDATION SWITCH WIRE VECU SIDE, CIRCUIT SHORT TO GROUND. THIS IS DUE TO A BUG IN THE SOFTWARE.

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.

THE ANTI-LOCK BRAKE SYSTEM (ABS) SENSOR CONNECTOR ON SOME MACK TRUCKS BUILT BETWEEN 01/01/2013 AND 11/07/2014 MAY SHOW SIGNS OF CORROSION. CORROSION OF THE ABS SENSOR CONNECTOR CAN CAUSE ABS SENSOR FAULT CODES AND CAUSE THE ENGINE TO DE-RATE ON TRUCKS EQUIPPED WITH MDRIVE TRANSMISSIONS ONLY.

DURING LONG HARD PULL CONDITIONS, DIAGNOSTIC TROUBLE CODES (DTC) SPN 100 FMI 1 OR P052400 CAN LOG, OR ENGINE SHUT DOWN MAY OCCUR ON CERTAIN HIGH MILEAGE MACK CXU, GU, LEU AND MRU VEHICLES BUILT BETWEEN JANUARY 1, 2010 AND APRIL 2, 2015 WITH MP7 ENGINES. THESE DTC MAY OCCUR DURING THE CONDITIONS DESCRIBED IN THIS BULLETIN, WITH OR WITHOUT AN ENGINE SHUT DOWN LAMP.

SOME MACK VEHICLES EQUIPPED WITH MP8 ENGINES BUILT SINCE JANUARY 2010 REPORT OIL LEAKING AT THE DRAIN PLUG INSERT IN THE 13L PLASTIC OIL PAN (PART NUMBER 21368390) DUE TO O-RING MATERIAL DEGRADATION. IF OIL PAN IS SHOWING EVIDENCE OF LEAKAGE, REPLACE ALL O-RINGS AND SEALING RINGS.

CERTAIN MACK VEHICLES BUILT BETWEEN JANUARY 1, 2013 AND AUGUST 17, 2015 MAY EXPERIENCE A PREMIUM TECH TOOL (PTT) ERROR CODE 38 FOR SCR OVERTEMP WHEN PERFORMING A PTT REGENERATION. IF ERROR CODE 38 OCCURS, CHECK THE ENGINE ECU MAIN SOFTWARE BEFORE PERFORMING ANY TROUBLESHOOTING.

SPEED LIMIT, WARNING LIGHT OR BUZZER WHEN THE SUSPENSION IS LEFT DUMPED. THIS IS DUE TO THE FACT THAT THE SOFTWARE IN THE VECU DID NOT SUPPORT VENDOR ENGINES FOR THIS FUNCTION.

CERTAIN MACK CXU, AND GU TRUCKS EQUIPPED WITH A CUMMINS ENGINE, AND BUILT BETWEEN JANUARY 1, 2013 AND SEPTEMBER 28, 2014, MAY ACTIVATE AN MID 140 SID 250 FMI 9 FAULT CODE AND CAUSE AN INTERMITTENT DISPLAY OF AN MIL LIGHT. THE MID 140 CODE IS DUE TO A MESSAGE TIMEOUT BETWEEN THE INSTRUMENT CLUSTER AND THE ENGINE.

SOFTWARE UPDATES WITH ENHANCEMENTS ARE AVAILABLE FOR THE ENGINE CONTROL MODULE (ECM) AND AFTERTREATMENT CONTROL MODULE ACM) FOR MACK MP7, MP8 AND MP10 ENGINES ON OBD2013 VEHICLES BUILT FROM FEBRUARY 1, 2013 TO FEBRUARY 6, 2014.

Revised battery ti battery cable

Indicator Lamp ( MIL ); Possible Derate Warning US10 And Newer Chassis

- US10+OBD13 And Newer Emissions

Certain MACK CHU, CXU, and GU trucks built between 11/11/2013 and 01/14/2015, equipped with front radar may experience loss of front object detection or erratic operation of cruise control functions. The terminal seals of the harness is allowing moisture and corrosion to build up in the front radar harness and/or radar antenna module.

loss of front object detection or erratic operation of cruise control functions. The terminal seals of the harness is allowing moisture and corrosion to build up in the front radar harness. To ensure proper operation of the front radar, the harness is inspected for the proper seal and/or corrosion. If the harness or seal fail inspection, replacement of the harness is required. Follow the inspection and repair procedures outlined in this document.

loss of front object detection or erratic operation of cruise control functions. The terminal seals of the harness is allowing moisture and corrosion to build up in the front radar harness. To ensure proper operation of the front radar, the harness is inspected for the proper seal and/or corrosion. If the harness or seal fail inspection, replacement of the harness is required. Follow the inspection and repair procedures outlined in this document.

loss of front object detection or erratic operation of cruise control functions. The terminal seals of the harness is allowing moisture and corrosion to build up in the front radar harness. To ensure proper operation of the front radar, the harness is inspected for the proper seal and/or corrosion. If the harness or seal fail inspection, replacement of the harness is required. Follow the inspection and repair procedures outlined in this document.

Installing An ECU With A Newer Part Number - US04 To US10 Chassis (9-Pin Diagnostic Connector)

Model Year 2014); Newer Chassis AFTER Reviewing Other Solutions

Performance - US10+OBD13, US14+OBD13 To US14+OBD16, Model Years 2014 To 2017

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

procedures

CERTAIN MACK CHU, CXU, AND GU TRUCKS BUILT BETWEEN 11/11/2013 AND 01/14/2015, EQUIPPED WITH FRONT RADAR MAY EXPERIENCE LOSS OF FRONT OBJECT DETECTION OR ERRATIC OPERATION OF CRUISE CONTROL FUNCTIONS. THE TERMINAL SEALS OF THE HARNESS IS ALLOWING MOISTURE AND CORROSION TO BUILD UP IN THE FRONT RADAR HARNESS AND/OR RADAR ANTENNA MODULE.

CERTAIN MACK CHU, CXU, AND GU TRUCKS BUILT BETWEEN 11/11/2013 AND 01/14/2015, EQUIPPED WITH FRONT RADAR MAY EXPERIENCE LOSS OF FRONT OBJECT DETECTION OR ERRATIC OPERATION OF CRUISE CONTROL FUNCTIONS. THE TERMINAL SEALS OF THE HARNESS IS ALLOWING MOISTURE AND CORROSION TO BUILD UP IN THE FRONT RADAR HARNESS.

CERTAIN MACK CHU, CXU, AND GU TRUCKS BUILT BETWEEN 11/11/2013 AND 01/14/2015, EQUIPPED WITH FRONT RADAR MAY EXPERIENCE LOSS OF FRONT OBJECT DETECTION OR ERRATIC OPERATION OF CRUISE CONTROL FUNCTIONS. THE TERMINAL SEALS OF THE HARNESS IS ALLOWING MOISTURE AND CORROSION TO BUILD UP IN THE FRONT RADAR HARNESS.

CERTAIN MACK CHU, CXU, AND GU TRUCKS BUILT BETWEEN 11/11/2013 AND 01/14/2015, EQUIPPED WITH FRONT RADAR MAY EXPERIENCE LOSS OF FRONT OBJECT DETECTION OR ERRATIC OPERATION OF CRUISE CONTROL FUNCTIONS. THE TERMINAL SEALS OF THE HARNESS IS ALLOWING MOISTURE AND CORROSION TO BUILD UP IN THE FRONT RADAR HARNESS. TO ENSURE PROPER OPERATION OF THE FRONT RADAR, THE HARNESS IS INSPECTED FOR THE PROPER SEAL AND/OR CORROSION.

ON CERTAIN MACK MODELS, BUILT BETWEEN 09/04/2010 AND 08/15/2014, WITH AN AIR SLIDE 5TH WHEEL, THERE WILL BE NO WARNING WHEN THE OUTPUT FROM THE VECU GETS SHORTED TO GND. THIS CAN CAUSE THE 5TH WHEEL TO SLIDE WITHOUT ACTIVATING THE 5TH WHEEL SLIDE SWITCH. THIS IS DUE TO THE FACT THAT THE SW IN THE VECU AND INSTRUMENT CLUSTER DID NOT SUPPORT THE FAULT MONITORING FOR THIS FUNCTION. PERFORMING THE BELOW PROCEDURE WILL ACTIVATE THE FAULT MONITORING AND WARNING.

CERTAIN MACK CHU, CXU, AND GU TRUCKS BUILT BETWEEN 11/11/2013 AND 01/14/2015, EQUIPPED WITH FRONT RADAR MAY EXPERIENCE LOSS OF FRONT OBJECT DETECTION OR ERRATIC OPERATION OF CRUISE CONTROL FUNCTIONS. THE TERMINAL SEALS OF THE HARNESS IS ALLOWING MOISTURE AND CORROSION TO BUILD UP IN THE FRONT RADAR HARNESS AND/OR RADAR ANTENNA MODULE.

CAB WIRING HARNESS MAY EXPERIENCE CHAFING.

(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.

FRAME RAIL BEHIND THE BATTERY BOX, MAY HAVE BEEN IMPROPERLY TORQUED. THIS IMPROPER TORQUE MAY HAVE ALLOWED CORROSION INHIBITOR TO GET BETWEEN THE RING TERMINALS WHICH MAY CAUSE MULTIPLE FAULT CODES AND/OR INTERMITTENT ISSUES.

SOME MACK CHU, CXU, GU, TD, LEU, MRU, AND LR TRUCKS BUILT FROM 03/19/2012 TO 08/30/2015 AND EQUIPPED WITH MRIDE SUSPENSIONS MAY INADVERTENTLY LOSE THE V-STAY ROD COVER (PART NUMBER 21896762) FROM THE V-STAY ROD. THE REPLACEMENT V-STAY ROD COVER WILL BE INSTALLED AND SECURED WITH A TACK WELD IN TWO PLACES (180 DEGREES APART).

CERTAIN MACK CHU, CXU, AND GU TRUCKS BUILT BETWEEN 11/11/2013 AND 01/14/2015, EQUIPPED WITH FRONT RADAR MAY EXPERIENCE LOSS OF FRONT OBJECT DETECTION OR ERRATIC OPERATION OF CRUISE CONTROL FUNCTIONS. THE TERMINAL SEALS OF THE HARNESS IS ALLOWING MOISTURE AND CORROSION TO BUILD UP IN THE FRONT RADAR HARNESS AND/OR RADAR ANTENNA MODULE.

loss of front object detection or erratic operation of cruise control functions. The terminal seals of the harness is allowing moisture and corrosion to build up in the front radar harness. To ensure proper operation of the front radar, the harness is inspected for the proper seal and/or corrosion. If the harness or seal fail inspection, replacement of the harness is required. Follow the inspection and repair procedures outlined in this document.

loss of front object detection or erratic operation of cruise control functions. The terminal seals of the harness is allowing moisture and corrosion to build up in the front radar harness. To ensure proper operation of the front radar, the harness is inspected for the proper seal and/or corrosion. If the harness or seal fail inspection, replacement of the harness is required. Follow the inspection and repair procedures outlined in this document.

Vehicles require a replacement Diesel Particulate Filter (DPF) along with updated software.

Displayed When Attempting To Run Diagnostics For Diagnostic Trouble Codes (DTC) Or Programming - US10+OBD13 And Newer Emissions,

TECH TOOL ( PTT ) - US10+OBD2013 to US14+OBD2016 (Non-Common Rail) Emissions, Commonly Model Years 2014 To 2017

Warning - US10+OBD13 And Newer Emissions, Model Year 2014 And Newer

Non-Common Rail Fuel System )

Emissions, Model Year 2011 And Newer

Emissions, Model Year 2008 And Newer

43 Displayed - US10+OBD13 And Newer Emissions, Common Model Year 2014 And Newer

2008 And Newer

To 2017

TECH TOOL ( PTT ) - US10+OBD2013 to US14+OBD2016 (Non-Common Rail) Emissions, Commonly Model Years 2014 To 2017

Rail Fuel System), Common Model Years 2014 To 2017

US14+OBD16 Emissions (Non-Common Rail Fuel System), Commonly Model Years 2014 to 2017

US14+OBD16 Emissions (Non-Common Rail Fuel System), Commonly Model Years 2014 to 2017

US14+OBD16 Emissions (Non-Common Rail Fuel System), Commonly Model Years 2014 to 2017

System) Chassis ONLY

System) Chassis ONLY

System) Chassis ONLY

Chassis With Common Rail Fuel System, Updated to reflect GHG17 software release

Chassis With Common Rail Fuel System.Changed repair instructions to reflect new procedures

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)

Tech Tip, Added correct operation ID

solution released with improved information

THIS BULLETIN IS RELEASED TO ADDRESS HIGH COUNTS OF DIAGNOSTIC TROUBLE CODE (DTC) SPN 2659 FMI 18 OR P0401 ONLY DURING NORMAL TO HIGH LOAD DRIVING CONDITIONS ON VEHICLES ASSEMBLED BETWEEN JANUARY 2010 AND DECEMBER 2013. IT HAS BEEN DETERMINED THAT DEPOSITS IN THE EGR COOLER CAN BUILD UP AND CAUSE HIGH RESTRICTION OVER TIME. THIS HIGH RESTRICTION PREVENTS THE REQUIRED AMOUNT OF EGR GAS FROM FLOWING THROUGH THE EGR COOLER CREATING DTC SPN 2659 FMI 18 OR P0401 EGR MASS FLOW RATE LOW TO BE LOGGED INTERMITTENTLY. NORMALLY, THIS IS ONLY REPORTED ON HIGHER MILEAGE VEHICLES.

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.

Lateral cab movement bracket.

Grille bar, replacment.

Loose oil filter spud.

Cooling system connections.

Torque rod interference.

Field repair for installing the grill.

Axle Carrier Pinion Angles

Fan Ring clearance for GU Model Truck.

Manifold (PPM)

Model Years 2013 (Rare), 2014

BE SUBJECT TO PREMATURE LOOSENING ON CERTAIN CHU, CMH, CMM, CXU, GU, LEU, LR, MRU AND TD MODEL VEHICLES. THE POTENTIAL RISK IS THAT IF THE NUT COMES OFF, THE YOKE CAN SEPARATE FROM THE AXLE INPUT SHAFT AND CAUSE THE DRIVESHAFT TO DISCONNECT. IF THIS OCCURS, A DISCONNECTED DRIVESHAFT CAN DISABLE THE VEHICLE AND RESULT IN DEBRIS IN THE ROADWAY, WHICH INCREASES THE RISK OF A VEHICLE CRASH.

Default Settings Guidelines, ParameterP1AOB; Fault Code P1052-54, Error 40,Or Error 18 Encountered During Clutch Or Tran.

Fault Codes Being Generated

Two-Piece clutch brake.

For Chassis Return Visit With Transmission Issues After A Repair Requiring Control Housing Removal And Reinstallation - US07 And N.

Codes P1058 - 21 Or MID 130 PID 161 FMI 1

PTT ) Gearbox Calibration Failure; Gearbox Calibration Operation Stops And Fails At 33% When Run With Transmission Removed

Reference Guide - US07 And Newer Emissions, Model Year 2008 And Newer

Specifications - Model Years 2010 To 2020

Unintentional Disengagement Of High Range - US07 And Newer Emissions, Model Year 2008 And Newer

Intermittent Fault In Cold Weather - US07 And Newer Emissions, Model Year 2008 And Newer

descriptions )

Unintentional Disengagement Of High Range - US07 And Newer Emissions, Model Year 2008 And Newer

solenoid bracket or transmission harness connector failures due to excessive vibration.

issues with static steering while sitting still. There is not enough ability with a single steering gear to overcome certain turning frictions.

OPEN CIRCUITS IN THE 31 WAY TRANSMISSION CONNECTOR. THIS IS DUE TO A SUPPLIER MANUFACTURING ISSUE WITH THE CONNECTOR.

ON CERTAIN MACK TRUCKS BUILT FROM 5/7/2012 TO 11/07/2014 WITH THE M-DRIVE TRANSMISSION, THE VEHICLE SPEED SENSOR (VSS) MAY FAIL INTERNALLY. THIS IS DUE TO A MANUFACTURING DEFECT OF THE SENSOR. THIS FAILURE MAY CAUSE FAULT CODES RELATED TO ROAD SPEED. THIS FAILURE CAN CAUSE MULTIPLE SPN 84 FMI 19 FAULTS, BOTH ACTIVE AND INACTIVE, TO OCCUR AND MAY CAUSE THE MIL LIGHT TO COME ON IN THE DASH.

EQUIPPED WITH 203 MM (8 IN) REAR DRUM BRAKES AND CAMELBACK REAR SUSPENSION.

EQUIPPED WITH A MACK 14.6K STEER AXLE, UNITIZED HUB, AND 152 MM (6.0 IN) WIDE MERITOR BRAKE SHOES CAN SHOW SIGNS OF BRAKE SHOE PROTRUSION BEYOND THE BRAKE DRUM. THIS CONDITION IS RESOLVED BY INSTALLING NEW 152 MM (6.0 IN) BRAKE SHOES, NEW DUST SHIELDS, AND NEW 178 MM (7.0 IN) WIDE BRAKE DRUMS (20536276).

EQUIPPED WITH A MACK 14.6K STEER AXLE, UNITIZED HUB, AND 152 MM (6.0 IN) WIDE MERITOR BRAKE SHOES CAN SHOW SIGNS OF BRAKE SHOE PROTRUSION BEYOND THE BRAKE DRUM. THIS CONDITION IS RESOLVED BY INSTALLING NEW 152 MM (6.0 IN) BRAKE SHOES, NEW DUST SHIELDS, AND NEW 178 MM (7.0 IN) WIDE BRAKE DRUMS (20536276).

equipped with a MACK 14.6k steer axle, unitized hub, and 152 mm (6.0 in) wide Bendix brake shoes can show signs of brake shoe protrusion beyond the brake drum. This condition is resolved by installing new 152 mm (6.0 in) brake shoes, 178 mm (7.0 in) wide brake drums (20536276), new dust shields, and replace the existing Z-Brackets.

BASIC ESP PACKAGE (ZMX-A1X), AND BUILT BETWEEN JANUARY 1, 2010 AND NOVEMBER 9, 2014, MAY ACTIVATE AN MID 136 ANTI-LOCK BRAKE SYSTEM (ABS) SID 66 FMI 7 OR BENDIX DTC 20-8 CODE WITHOUT ANY COMPONENT FAILURES, MECHANICAL FAILURES, OR SYSTEM MIS-WIRES. THE MID 136 CODE IS DUE TO AN ABS ELECTRONIC CONTROL UNIT (ECU) THRESHOLD SETTING. FOLLOW THE BRAKE ECU (MID 136) REPAIR AND REPROGRAMMING STEPS OUTLINED IN THIS FIELD SERVICE BULLETIN (FSB).

Air suspension ride height.

Commonly Model Year 2008 And Newer

Some MACK GU, MRU, LEU trucks built from 03/19/2012 to 08/30/2015 and equipped with mRide suspensions may Inadvertently lose the v-stay rod cover (part number 21896762) from the v-stay rod.

hole in the mRide suspension may become stripped, causing the V-Stay torque rod bolt to pull free from the carrier housing.

SOME MACK GU, MRU, LEU TRUCKS BUILT FROM 03/19/2012 TO 08/30/2015 AND EQUIPPED WITH MRIDE SUSPENSIONS MAY INADVERTENTLY LOSE THE V-STAY ROD COVER (PART NUMBER 21896762) FROM THE V-STAY ROD.

SOME MACK GU, MRU, LEU TRUCKS BUILT FROM 03/19/2012 TO 08/30/2015 AND EQUIPPED WITH MRIDE SUSPENSIONS MAY INADVERTENTLY LOSE THE V-STAY ROD COVER (PART NUMBER 21896762) FROM THE V-STAY ROD.

HVAC fine particulate filter.

BLOW OUT FROM THE AIR COMPRESSOR FITTINGS.

THE AIR COMPRESSOR FITTINGS.

OBD15 And OBD16 Conventional Chassis.Updated to reflect release of FSB284-064 (Above)

Model Year ( MY ) 2016 and 2017 Chassis.Updated to reflect release of FSB284-064 (Above)

(Non-Common Rail).Updated to reflect release of FSB284-064 (Above)

Newer.Updated to reflect release of FSB284-064 (Above)

Paint protection.