# Service bulletin SB\-21\-5035

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.

- Type: Service bulletin
- NHTSA id: 10027767
- Published by NHTSA: 2009\-02\-03
- Manufacturer's number: SB\-21\-5035
- Manufacturer's date: 2008\-10\-17
- NHTSA component: ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN

## NHTSA's summary

MACK TRUCK: REVISED FAN HUB MOUNTING BOLT TORQUE. FOR THIS APPLICATION ONLY, THE FAN HUB MOUNTING STUD MATERIAL PROPERTIES AND LENGTH HAVE BEEN CHANGED TO 45MM \(WAS 40MM\) TO ENSURE FULL NUT ENGAGEMENT. MODEL YEARS UNKNOWN. \*PE

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Engine, Cooling fan, Cooling system

## Vehicles listed

- 2006 to 2008 MACK CHU
- 2006 to 2009 MACK GU

JSON: [/v1/bulletins/10027767](/v1/bulletins/10027767)

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