TSB: MACK ANTHEM, ANTHEM (AN), ASET, CH, CHK SERIES, CHN, CHU, CHU612, CHU613, CHU614, CL, CLASS 6, CLASS 7, CLASS 8, CMH, CMM, CRD SERIES, CRD112/113, CRD200, CRD92/93, CS 300, CS 300P, CS SERIES, CT, CT713, CTP, CV, CX, CXN, CXP, CXU, CXU612, CXU613, CXU613E, CXU614, DM, DM SERIES, DM400, DM600, DM807, DM809, DM811, DMM SERIES, E6, E7, F SERIES, FDM, FREEDOM, GRANITE (GR), GRANITE (GU), GU, GU713, GU812E, GU813, GU813E, GU814, J-TECH, LE, LEU, LR, LR ELECTRIC, LR6, M35AK, M65BX, MACK, MB SERIES, MC400, MC600, MD, MH, MIDLINER, MIDR, MILITARY VEHICLE, MR, MR SERIES, MR400, MR600, MRU, MS SERIES, MS200P, MS300, MS300P, PINNACLE (CHU), PINNACLE (CXU), PINNACLE (PI), R, RB, RD, RD SERIES, RM SERIES, RW SERIES, SR70, T200, T2060A, T2090L, T2090LR, T300, TD, TD713, TD714, TERRAPRO (LEU), TERRAPRO (LEU/MRU), TERRAPRO (MRU), TERRAPRO (TE), TITAN, TITAN (TD), U, V-MAC, V-MAC III, WL, WS (2008–2023)

Bulletin KC-633 — May 13, 2022

Bulletin Details

Bulletin IDKC-633
ManufacturerMACK
ModelsANTHEM, ANTHEM (AN), ASET, CH, CHK SERIES, CHN, CHU, CHU612, CHU613, CHU614, CL, CLASS 6, CLASS 7, CLASS 8, CMH, CMM, CRD SERIES, CRD112/113, CRD200, CRD92/93, CS 300, CS 300P, CS SERIES, CT, CT713, CTP, CV, CX, CXN, CXP, CXU, CXU612, CXU613, CXU613E, CXU614, DM, DM SERIES, DM400, DM600, DM807, DM809, DM811, DMM SERIES, E6, E7, F SERIES, FDM, FREEDOM, GRANITE (GR), GRANITE (GU), GU, GU713, GU812E, GU813, GU813E, GU814, J-TECH, LE, LEU, LR, LR ELECTRIC, LR6, M35AK, M65BX, MACK, MB SERIES, MC400, MC600, MD, MH, MIDLINER, MIDR, MILITARY VEHICLE, MR, MR SERIES, MR400, MR600, MRU, MS SERIES, MS200P, MS300, MS300P, PINNACLE (CHU), PINNACLE (CXU), PINNACLE (PI), R, RB, RD, RD SERIES, RM SERIES, RW SERIES, SR70, T200, T2060A, T2090L, T2090LR, T300, TD, TD713, TD714, TERRAPRO (LEU), TERRAPRO (LEU/MRU), TERRAPRO (MRU), TERRAPRO (TE), TITAN, TITAN (TD), U, V-MAC, V-MAC III, WL, WS
Model Years2008–2023
Date IssuedMay 13, 2022
Date Added to NHTSAJune 6, 2022
ComponentWHEELS
Vehicles Affected307 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

Mack Chassis - Front Hub With Unit-Bearings ( Unitized Wheel Bearings ), Inspection Information And Guidelines - Commonly Model Year 2008 And Newer

Affected Vehicles

MakeModelYearComponent
MACK GRANITE (GR) 2023 200000 WHEELS
MACK LR ELECTRIC 2023 200000 WHEELS
MACK MD 2023 200000 WHEELS
MACK ANTHEM (AN) 2022 200000 WHEELS
MACK GRANITE (GR) 2022 200000 WHEELS
MACK LR 2022 200000 WHEELS
MACK LR ELECTRIC 2022 200000 WHEELS
MACK MD 2022 200000 WHEELS
MACK PINNACLE (CHU) 2022 200000 WHEELS
MACK PINNACLE (CXU) 2022 200000 WHEELS
MACK PINNACLE (PI) 2022 200000 WHEELS
MACK TERRAPRO (MRU) 2022 200000 WHEELS
MACK TERRAPRO (TE) 2022 200000 WHEELS
MACK ANTHEM (AN) 2021 200000 WHEELS
MACK GRANITE (GR) 2021 200000 WHEELS
MACK LR 2021 200000 WHEELS
MACK LR ELECTRIC 2021 200000 WHEELS
MACK MD 2021 200000 WHEELS
MACK PINNACLE (CHU) 2021 200000 WHEELS
MACK PINNACLE (CXU) 2021 200000 WHEELS
MACK PINNACLE (PI) 2021 200000 WHEELS
MACK TERRAPRO (MRU) 2021 200000 WHEELS
MACK TERRAPRO (TE) 2021 200000 WHEELS
MACK ANTHEM (AN) 2020 200000 WHEELS
MACK GRANITE (GR) 2020 200000 WHEELS
MACK LR 2020 200000 WHEELS
MACK LR ELECTRIC 2020 200000 WHEELS
MACK MD 2020 200000 WHEELS
MACK PINNACLE (CHU) 2020 200000 WHEELS
MACK PINNACLE (CXU) 2020 200000 WHEELS
MACK PINNACLE (PI) 2020 200000 WHEELS
MACK TERRAPRO (MRU) 2020 200000 WHEELS
MACK TERRAPRO (TE) 2020 200000 WHEELS
MACK ANTHEM (AN) 2019 200000 WHEELS
MACK GRANITE (GR) 2019 200000 WHEELS
MACK LR 2019 200000 WHEELS
MACK PINNACLE (CHU) 2019 200000 WHEELS
MACK PINNACLE (CXU) 2019 200000 WHEELS
MACK PINNACLE (PI) 2019 200000 WHEELS
MACK TD 2019 200000 WHEELS
MACK TERRAPRO (LEU/MRU) 2019 200000 WHEELS
MACK TERRAPRO (MRU) 2019 200000 WHEELS
MACK TERRAPRO (TE) 2019 200000 WHEELS
MACK ANTHEM (AN) 2018 200000 WHEELS
MACK CHU 2018 200000 WHEELS
MACK CXU 2018 200000 WHEELS
MACK GRANITE (GR) 2018 200000 WHEELS
MACK GU 2018 200000 WHEELS
MACK LR 2018 200000 WHEELS
MACK MRU 2018 200000 WHEELS
MACK PINNACLE (CHU) 2018 200000 WHEELS
MACK PINNACLE (CXU) 2018 200000 WHEELS
MACK PINNACLE (PI) 2018 200000 WHEELS
MACK TD 2018 200000 WHEELS
MACK TERRAPRO (LEU/MRU) 2018 200000 WHEELS
MACK TERRAPRO (MRU) 2018 200000 WHEELS
MACK TERRAPRO (TE) 2018 200000 WHEELS
MACK TITAN (TD) 2018 200000 WHEELS
MACK ANTHEM (AN) 2017 200000 WHEELS
MACK CHU 2017 200000 WHEELS
MACK CXU 2017 200000 WHEELS
MACK GRANITE (GU) 2017 200000 WHEELS
MACK GU 2017 200000 WHEELS
MACK LEU 2017 200000 WHEELS
MACK LR 2017 200000 WHEELS
MACK MRU 2017 200000 WHEELS
MACK PINNACLE (CHU) 2017 200000 WHEELS
MACK PINNACLE (CXU) 2017 200000 WHEELS
MACK TD 2017 200000 WHEELS
MACK TERRAPRO (LEU/MRU) 2017 200000 WHEELS
MACK TERRAPRO (MRU) 2017 200000 WHEELS
MACK TERRAPRO (TE) 2017 200000 WHEELS
MACK TITAN (TD) 2017 200000 WHEELS
MACK ANTHEM 2016 200000 WHEELS
MACK CHU 2016 200000 WHEELS
MACK CXU 2016 200000 WHEELS
MACK GRANITE (GU) 2016 200000 WHEELS
MACK GU 2016 200000 WHEELS
MACK LEU 2016 200000 WHEELS
MACK LR 2016 200000 WHEELS
MACK LR6 2016 200000 WHEELS
MACK MRU 2016 200000 WHEELS
MACK PINNACLE (CHU) 2016 200000 WHEELS
MACK PINNACLE (CXU) 2016 200000 WHEELS
MACK TD 2016 200000 WHEELS
MACK TERRAPRO (LEU) 2016 200000 WHEELS
MACK TERRAPRO (LEU/MRU) 2016 200000 WHEELS
MACK TERRAPRO (MRU) 2016 200000 WHEELS
MACK TITAN (TD) 2016 200000 WHEELS
MACK CHU 2015 200000 WHEELS
MACK CXU 2015 200000 WHEELS
MACK GRANITE (GU) 2015 200000 WHEELS
MACK GU 2015 200000 WHEELS
MACK LEU 2015 200000 WHEELS
MACK LR 2015 200000 WHEELS
MACK LR6 2015 200000 WHEELS
MACK MRU 2015 200000 WHEELS
MACK PINNACLE (CHU) 2015 200000 WHEELS
MACK PINNACLE (CXU) 2015 200000 WHEELS
MACK TD 2015 200000 WHEELS
MACK TERRAPRO (LEU) 2015 200000 WHEELS
MACK TERRAPRO (LEU/MRU) 2015 200000 WHEELS
MACK TERRAPRO (MRU) 2015 200000 WHEELS
MACK TITAN 2015 200000 WHEELS
MACK TITAN (TD) 2015 200000 WHEELS
MACK CHU 2014 200000 WHEELS
MACK CXU 2014 200000 WHEELS
MACK GRANITE (GU) 2014 200000 WHEELS
MACK GU 2014 200000 WHEELS
MACK LEU 2014 200000 WHEELS
MACK LR 2014 200000 WHEELS
MACK LR6 2014 200000 WHEELS
MACK MRU 2014 200000 WHEELS
MACK PINNACLE (CHU) 2014 200000 WHEELS
MACK PINNACLE (CXU) 2014 200000 WHEELS
MACK TD 2014 200000 WHEELS
MACK TERRAPRO (LEU) 2014 200000 WHEELS
MACK TERRAPRO (LEU/MRU) 2014 200000 WHEELS
MACK TERRAPRO (MRU) 2014 200000 WHEELS
MACK TITAN 2014 200000 WHEELS
MACK TITAN (TD) 2014 200000 WHEELS
MACK CHU 2013 200000 WHEELS
MACK CMM 2013 200000 WHEELS
MACK CXU 2013 200000 WHEELS
MACK GRANITE (GU) 2013 200000 WHEELS
MACK GU 2013 200000 WHEELS
MACK LEU 2013 200000 WHEELS
MACK LR 2013 200000 WHEELS
MACK LR6 2013 200000 WHEELS
MACK MRU 2013 200000 WHEELS
MACK PINNACLE (CHU) 2013 200000 WHEELS
MACK PINNACLE (CXU) 2013 200000 WHEELS
MACK TD 2013 200000 WHEELS
MACK TERRAPRO (LEU) 2013 200000 WHEELS
MACK TERRAPRO (LEU/MRU) 2013 200000 WHEELS
MACK TERRAPRO (MRU) 2013 200000 WHEELS
MACK TITAN 2013 200000 WHEELS
MACK TITAN (TD) 2013 200000 WHEELS
MACK CHU 2012 200000 WHEELS
MACK CMH 2012 200000 WHEELS
MACK CMM 2012 200000 WHEELS
MACK CXU 2012 200000 WHEELS
MACK GRANITE (GU) 2012 200000 WHEELS
MACK GU 2012 200000 WHEELS
MACK LEU 2012 200000 WHEELS
MACK LR 2012 200000 WHEELS
MACK LR6 2012 200000 WHEELS
MACK MRU 2012 200000 WHEELS
MACK PINNACLE (CHU) 2012 200000 WHEELS
MACK PINNACLE (CXU) 2012 200000 WHEELS
MACK TD 2012 200000 WHEELS
MACK TERRAPRO (LEU) 2012 200000 WHEELS
MACK TERRAPRO (LEU/MRU) 2012 200000 WHEELS
MACK TERRAPRO (MRU) 2012 200000 WHEELS
MACK TITAN (TD) 2012 200000 WHEELS
MACK CHU 2011 200000 WHEELS
MACK CMH 2011 200000 WHEELS
MACK CMM 2011 200000 WHEELS
MACK CXU 2011 200000 WHEELS
MACK CXU612 2011 200000 WHEELS
MACK GRANITE (GU) 2011 200000 WHEELS
MACK GU 2011 200000 WHEELS
MACK LEU 2011 200000 WHEELS
MACK LR 2011 200000 WHEELS
MACK LR6 2011 200000 WHEELS
MACK MRU 2011 200000 WHEELS
MACK PINNACLE (CHU) 2011 200000 WHEELS
MACK PINNACLE (CXU) 2011 200000 WHEELS
MACK TD 2011 200000 WHEELS
MACK TERRAPRO (LEU/MRU) 2011 200000 WHEELS
MACK TERRAPRO (MRU) 2011 200000 WHEELS
MACK TITAN (TD) 2011 200000 WHEELS
MACK CHU 2010 200000 WHEELS
MACK CHU613 2010 200000 WHEELS
MACK CHU614 2010 200000 WHEELS
MACK CMH 2010 200000 WHEELS
MACK CMM 2010 200000 WHEELS
MACK CXU 2010 200000 WHEELS
MACK CXU612 2010 200000 WHEELS
MACK CXU613 2010 200000 WHEELS
MACK CXU613E 2010 200000 WHEELS
MACK CXU614 2010 200000 WHEELS
MACK GRANITE (GU) 2010 200000 WHEELS
MACK GU 2010 200000 WHEELS
MACK GU713 2010 200000 WHEELS
MACK GU812E 2010 200000 WHEELS
MACK GU813 2010 200000 WHEELS
MACK GU813E 2010 200000 WHEELS
MACK GU814 2010 200000 WHEELS
MACK LEU 2010 200000 WHEELS
MACK LR 2010 200000 WHEELS
MACK PINNACLE (CHU) 2010 200000 WHEELS
MACK PINNACLE (CXU) 2010 200000 WHEELS
MACK TD 2010 200000 WHEELS
MACK TD713 2010 200000 WHEELS
MACK TD714 2010 200000 WHEELS
MACK TERRAPRO (LEU/MRU) 2010 200000 WHEELS
MACK TERRAPRO (MRU) 2010 200000 WHEELS
MACK TITAN (TD) 2010 200000 WHEELS
MACK CHU 2009 200000 WHEELS
MACK CXU 2009 200000 WHEELS
MACK GRANITE (GU) 2009 200000 WHEELS
MACK GU 2009 200000 WHEELS
MACK LEU 2009 200000 WHEELS
MACK PINNACLE (CHU) 2009 200000 WHEELS
MACK PINNACLE (CXU) 2009 200000 WHEELS
MACK TD 2009 200000 WHEELS
MACK TD714 2009 200000 WHEELS
MACK TERRAPRO (LEU/MRU) 2009 200000 WHEELS
MACK TERRAPRO (MRU) 2009 200000 WHEELS
MACK TITAN (TD) 2009 200000 WHEELS
MACK CHN 2008 200000 WHEELS
MACK CHU 2008 200000 WHEELS
MACK CHU612 2008 200000 WHEELS
MACK CHU613 2008 200000 WHEELS
MACK CL 2008 200000 WHEELS
MACK CT 2008 200000 WHEELS
MACK CT713 2008 200000 WHEELS
MACK CTP 2008 200000 WHEELS
MACK CV 2008 200000 WHEELS
MACK CXN 2008 200000 WHEELS
MACK CXP 2008 200000 WHEELS
MACK CXU 2008 200000 WHEELS
MACK CXU612 2008 200000 WHEELS
MACK CXU613 2008 200000 WHEELS
MACK GRANITE (GU) 2008 200000 WHEELS
MACK GU 2008 200000 WHEELS
MACK GU713 2008 200000 WHEELS
MACK GU813 2008 200000 WHEELS
MACK LEU 2008 200000 WHEELS
MACK PINNACLE (CHU) 2008 200000 WHEELS
MACK PINNACLE (CXU) 2008 200000 WHEELS
MACK TD 2008 200000 WHEELS
MACK TD714 2008 200000 WHEELS
MACK TERRAPRO (LEU/MRU) 2008 200000 WHEELS
MACK TERRAPRO (MRU) 2008 200000 WHEELS
MACK ASET 200000 WHEELS
MACK CH 200000 WHEELS
MACK CHK SERIES 200000 WHEELS
MACK CHU 200000 WHEELS
MACK CL 200000 WHEELS
MACK CLASS 6 200000 WHEELS
MACK CLASS 7 200000 WHEELS
MACK CLASS 8 200000 WHEELS
MACK CRD SERIES 200000 WHEELS
MACK CRD112/113 200000 WHEELS
MACK CRD200 200000 WHEELS
MACK CRD92/93 200000 WHEELS
MACK CS 300 200000 WHEELS
MACK CS 300P 200000 WHEELS
MACK CS SERIES 200000 WHEELS
MACK CV 200000 WHEELS
MACK CX 200000 WHEELS
MACK CXU 200000 WHEELS
MACK DM 200000 WHEELS
MACK DM SERIES 200000 WHEELS
MACK DM400 200000 WHEELS
MACK DM600 200000 WHEELS
MACK DM807 200000 WHEELS
MACK DM809 200000 WHEELS
MACK DM811 200000 WHEELS
MACK DMM SERIES 200000 WHEELS
MACK E6 200000 WHEELS
MACK E7 200000 WHEELS
MACK F SERIES 200000 WHEELS
MACK FDM 200000 WHEELS
MACK FREEDOM 200000 WHEELS
MACK GU 200000 WHEELS
MACK J-TECH 200000 WHEELS
MACK LE 200000 WHEELS
MACK LR 200000 WHEELS
MACK M35AK 200000 WHEELS
MACK M65BX 200000 WHEELS
MACK MACK 200000 WHEELS
MACK MB SERIES 200000 WHEELS
MACK MC400 200000 WHEELS
MACK MC600 200000 WHEELS
MACK MH 200000 WHEELS
MACK MIDLINER 200000 WHEELS
MACK MIDR 200000 WHEELS
MACK MILITARY VEHICLE 200000 WHEELS
MACK MR 200000 WHEELS
MACK MR SERIES 200000 WHEELS
MACK MR400 200000 WHEELS
MACK MR600 200000 WHEELS
MACK MS SERIES 200000 WHEELS
MACK MS200P 200000 WHEELS
MACK MS300 200000 WHEELS
MACK MS300P 200000 WHEELS
MACK R 200000 WHEELS
MACK RB 200000 WHEELS
MACK RD 200000 WHEELS
MACK RD SERIES 200000 WHEELS
MACK RM SERIES 200000 WHEELS
MACK RW SERIES 200000 WHEELS
MACK SR70 200000 WHEELS
MACK T200 200000 WHEELS
MACK T2060A 200000 WHEELS
MACK T2090L 200000 WHEELS
MACK T2090LR 200000 WHEELS
MACK T300 200000 WHEELS
MACK TD 200000 WHEELS
MACK U 200000 WHEELS
MACK V-MAC 200000 WHEELS
MACK V-MAC III 200000 WHEELS
MACK WL 200000 WHEELS
MACK WS 200000 WHEELS

Related MACK Recalls

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What Should You Do?

If your vehicle is affected by this TSB, contact your authorized MACK dealer. Bring this bulletin ID (KC-633) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.