Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 2,701 bulletins for MACK
FSB 237-020rev
Sep 28, 2017
103700 POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER
MACK CHU, CXU, GR, GU, and PI trucks built from 2009 to 2017 and equipped with MP7, MP8, and MP10 engines (EM-USA10, EM-USA14, and EM-USA17), will require a new torque specification for the Unit Injector Yoke Hold-Down Bolt. Effective immed
K65095713
Sep 28, 2017
110000 ELECTRICAL SYSTEM
On 14 August 2017 a new PTO solenoid for the AMT has been released to address issues with breakage when mounting dual solenoids. The dual PTO solenoid set up cannot be mounted on this new bracket without modifications.
FSB 846-003rev
Sep 18, 2017
060000 ENGINE (PWS)
MACK Trucks has determined that certain 2013 through 2015 year model CHU, CXU, GU and MRU trucks equipped with a MP8 model engine may be equipped with an improperly functioning on-board emission-related diagnostic system.
FSB 465-003rev
Sep 15, 2017
013000 STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
Effective September 2016, a revised composite bevel gear compartment cover and steel threaded fill plug with face-mounted o-ring was implemented into production for MACK CRD202/203, CRD150/151, and CRD125/126 carriers.
FSB 846-003
Sep 6, 2017
135000 VISIBILITY:REARVIEW MIRRORS/DEVICES
On some LR models with aftermarket bodies, the aftermarket body may impact the A-pillar mounted passenger side mirror. This is due to the geometry of the mirror support arm.
FSB465-003
Aug 28, 2017
350000 EQUIPMENT
Effective September 2016, a revised composite bevel gear compartment cover with steel threaded fill plug and face-mounted o-ring was implemented into production for MACK CRD202/203, CRD150/151 and CRD 125/126 carriers. The revised composite
EC0015
Aug 21, 2017
060000 ENGINE (PWS)
MACK Trucks has determined that certain 2017 year model Titan trucks equipped with US2016 MP10 emission level engine may be equipped with an improperly functioning on-board emission-related diagnostic system.
EC0017
Aug 21, 2017
060000 ENGINE (PWS)
MACK Trucks has determined that certain 2013 through 2015 year model CHU, CXU, GU and MRU trucks equipped with a MP8 model engine may be equipped with an improperly functioning on-board emission-related diagnostic system.
FSB 237-020
Jun 23, 2017
060000 ENGINE AND ENGINE COOLING
MACK CHU, CXU, GR, GU, and PI trucks built from 2009 to 2017 and equipped with MP7, MP8, and MP10 engines (EM-USA10, EM-USA14, and EM-USA17), will require a new torque specification for the Unit Injector Yoke Hold-Down Bolt.
FSB237-020
Jun 23, 2017
070000 FUEL SYSTEM, GASOLINE
Unit Injector Yoke Hold-Down Bolt Torque Specification
FSB 873-021
Jun 21, 2017
357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
On some LR models using CNG fuel, the HVAC air filter may prematurely clog with dirt and water. This is due to its location and increased vulnerability under the cab.
FSB 728-003
Apr 20, 2017
020000 SUSPENSION
Some MACK CXU612/CHU612 trucks built from October 4, 2010 to February 6, 2017 with single rear axle Hendrickson air suspension (RAD-A2H) and short tapered frame rail (RFL830, RF-TAP28/RF-TA28T) could have the level arm rise above the frame
FSB 381-017
Apr 18, 2017
100000 POWER TRAIN
On Mack LR models with PDLO, Power Divider Lock Out, the alarm for this feature, while engaged, will only sound once and the volume may seem low. There will be a continuous pop-up in the instrument cluster while engaged. This is due to an i
PI 0876
Apr 18, 2017
060000 ENGINE AND ENGINE COOLING
This repair requires the installation of a missing screw in the timing gear plate into the flywheel housing as the referenced in this installation procedure.
PI 0877
Mar 28, 2017
118000 ELECTRICAL SYSTEM:SOFTWARE
On some trucks with the Telematics Gateway (TGW) system, the TGW control unit may not correctly communicate with the vehicle systems after restarting. The behavior associated with this issue will be a high number of MID 140 PSID 239 FMI 12
FSB 641-010
Mar 14, 2017
010000 STEERING
When pressure washing the LR truck, do not pressure wash the steering shaft. Direct pressure washing of the LR steering shaft may lead to oxidation inside the shaft due to high pressure water gaining access and entry into the steering shaft
FSB 642-001
Mar 14, 2017
010000 STEERING
Certain GU trucks equipped with forward steer axles (18,000 lb rated front axles) and built from 2012, may experience issues with static steering while sitting still. There is not enough ability with a single steering gear to overcome certa
FSB 642-002
Mar 14, 2017
010000 STEERING
Certain GU trucks equipped with forward steer axles (18,000 lb rated front axles) and built before 2012, may experience issues with static steering while sitting still. There is not enough ability with a single steering gear to overcome cer
PI 0871
Mar 13, 2017
060000 ENGINE (PWS)
Software updates with enhancements are available for the Engine Control Module (ECM) for MACK MP7, MP8, and MP10 engines with US2016 emission level on vehicles built from January 4, 2016 to May 6, 2016.
FSB 211-001
Feb 10, 2017
060000 ENGINE AND ENGINE COOLING
Lower Valve Cover Crush Sleeve, Installation, During removal and installation of the two-piece valve cover assembly, pay close attention to ensure the all of the crush sleeve are properly installed in the lower valve cover. The crush sleeve
FSB 271-003
Feb 10, 2017
181000 VEHICLE SPEED CONTROL:ACCELERATOR PEDAL
A new optional accelerator pedal is available and can be retrofitted to adapt to customer preferences. Follow the instructions outlined in this Field Service Bulletin (FSB) to retrofit the optional accelerator pedal.
PI 0875
Jan 30, 2017
060000 ENGINE AND ENGINE COOLING
Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Valve, Replacement, Certain MACK CHU, CXU, and GU trucks built between 10/03/2016 and 11/07/2016 may experience a coolant leakage issue with the Aftertreatment Diesel Exhaust Fluid (DEF) Dosi
FSB 213-002
Jan 27, 2017
060000 ENGINE (PWS)
Exhaust Rocker Compression Brake Piston, Repair, For MACK CHU, CXU, GU, and TD trucks built from 01/01/2007 to present, a repair procedure and new tools have been created to repair of the exhaust rocker compression brake pistons. In some in
FSB 728-002
Jan 16, 2017
020000 SUSPENSION
ON ALL MACK TRUCKS EQUIPPED WITH ELECTRONICALLY CONTROLLED SUSPENSION (ECS) THE LEVEL SENSOR ARM MAY BREAK CAUSING THE ECS SYSTEM TO FAIL.
FSB 381-016
Nov 10, 2016
060000 ENGINE AND ENGINE COOLING
Certain MACK Trucks built between November 9, 2015 and July 1, 2016, and equipped with an MP engine, may be unable to initiate a stationary regen using the stalk switch even if all ATS status items are ok. You could also see the following m