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NHTSA ID Number: 10161919
Manufacturer Communication Number: K27230737
Summary
Mack Chassis – Granite Models (GU, GR) – Revised Fan Ring Design; Engine Cooling Fan Ring Cracked At Welds – Model Years 2016 To 2020
5 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| MACK | GRANITE (GR) | 2016-2018 |
| MACK | GRANITE (GU) | 2019-2020 |
Solution K27230737
Monday, June 3, 2019 7:26:44 PM CEST
| ** SOLUTION ** | ||||||||||
| Title | Mack Chassis – Granite Models (GU, GR) – Revised Fan Ring Design; Engine Cooling Fan Ring Cracked At Welds – Model Years 2016 To 2020 | |||||||||
| Mack Models | ||||||||||
| Mack Model | GR – Granite, GU – Granite | |||||||||
| Emission Standard | ||||||||||
| Emission Standard | US14+OBD15, US14+OBD16, US17, US17+OBD16, US17+OBD18 | |||||||||
| Engine family | ||||||||||
| Engine family | MP7, MP8 | |||||||||
| ** SOLUTION ** | ||||||||||
| Cause | The engine cooling fan ring on Granite chassis built during model years 2016 through early 2020 may crack at its welds.
Analysis has revealed that the symptom occurs due to a lack of contact between the rubber seal attached to the fan ring and the fan shroud. This can lead to increased vibration of the fan ring, as the rubber seal serves as a vibration dampener as well as airflow direction. |
|||||||||
| Solution | Affected date ranges: 2 June 2014 (W1423) – 24 June 2019 (W1921)
A new fan ring design has been released to address the vibration. The revised fan rings have been designed with a larger rubber seal that contacts the fan shroud and is able to effectively dampen vibration of the ring. Part numbers for the new fan ring design can be found below:
|
|||||||||
| Internal comments (BO) | Projected release date of 3/11/19 | |||||||||
| Solution visibility | Dealer distribution | |||||||||
| Function(s)/component(s) affected | ||||||||||
| Function affected | engine cooling fan | |||||||||
| Function Group | ||||||||||
| Function Group | 263 fan, fan shroud and clutch | |||||||||
| Customer effect | ||||||||||
| Main customer effect | vibration, visual appearance | |||||||||
| Visual appearance | crack/fracture | |||||||||
| Conditions | ||||||||||
| Frequency of occurrence of problem | random | |||||||||
| Administration | ||||||||||
| Author | RU4467V | |||||||||
| Dealer ID | RU4467V | |||||||||
| Last modified by | A241298 | |||||||||
| Creation date | 02-11-2018 14:11 | |||||||||
| Date of last update | 30-05-2019 13:05 | |||||||||
| Review date | 04-02-2019 00:02 | |||||||||
| Status | Published |
Solution K27230737
Monday, June 3, 2019 7:26:44 PM CEST
https://www.nhtsa.gov/recalls?nhtsaId=10161919
https://static.nhtsa.gov/odi/tsbs/2019/MC-10161919-9999.pdf
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