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Service bulletin KC-2248

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10232599
Published by NHTSA2023-03-07
Manufacturer's numberKC-2248
Manufacturer's date2023-02-21
NHTSA componentPOWER TRAIN; ENGINE AND ENGINE COOLING

NHTSA's summary

Flywheel Housing Thread Repair

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Transmission and driveline

Vehicles listed
MACK CHU
MACK CHU2006 to 2018
MACK CXU
MACK CXU2006 to 2018
MACK GRANITE (GR)2015 to 2016
MACK GRANITE (GR)2017, 2018, 2019, 2020, 2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
MACK GU
MACK GU2006 to 2018
MACK LE1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
MACK LEU2007 to 2017
MACK MRU2007
MACK MRU2011 to 2018
MACK TITAN2013 to 2015

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
10V0690002010-03-03. POWER TRAIN:AXLE ASSEMBLY
09V2400002009-06-30. POWER TRAIN:AXLE ASSEMBLY
20002482000-10-26. Engine

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TSB M-913-001 2026092026-10-02. Service bulletin. Parker engine-mounted hydraulic pump service bulletin.
CBR 2573-1 2026042026-05-05. Service bulletin. CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
CBR 2362-3 2026042026-05-04. Service bulletin. CBR - Mack Carrier Nut Adhesive Change.
CBR 2218-6 0320262026-04-02. Service bulletin. CBR - Parker F3 Hydraulic Pump Troubleshooting.
CBR 820-9 2026012026-02-03. Service bulletin. CBR - Mack Chassis - Engine Brake Only Works With The Brake Pedal, No Function During Cruise. US07 And Newer Emissions, Model Year 2008 And Newer.
CBR 2128-7 2026012026-02-03. Service bulletin. CBR - Engine Control Module (EMS) Software Information - Improvement List (Change Log), US21+OBD2021 Emissions ONLY
CBR 2107-22 2026012026-02-02. Service bulletin. CBR - Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions to US22+OBD2023 (DOES NOT APPLY TO AN(4) and PR(4)).
CBR 199 2025122026-01-05. Service bulletin. Vehicles affected by this issue will show coolant runoff on the front rights side of the engine.
CBR 2171-11 2025112025-12-03. Service bulletin. CBR - Mack Temperature Sensor Troubleshooting Guide
CBR 199-6 2025112025-12-03. Service bulletin. CBR - 13 Liter Engines ONLY - Engine Coolant Pump Housing Leak; Coolant Found Around The Oil Cooler Duct Cover Or In Between The Coolant Pump Housing And Oil Cooler Housing.