I recently bought a 2012 43qgp allegro bus with 25,000 miles. It has what sounds like an air hissing noise under the front end while the engine is running. The noise stops immediately when I turn off the engine.
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Took the motorhome to Freightliner, they talked to Tiffin, and the conclusion is that the noise is associated with normal operation of the power steering system.
I plan to talk to other bus owners along the way to see if they also hear the same noise in their coach.
Noticed the noise too. Had it checked out after I crawled under it. Most if not all buses on a power glide chassis will have the noise, and yes it is the power steering. Nothing to worry about. A bypass valve inside redirecting flow.
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2013 36 QSP Allegro Bus
2011 1500 Dodge Sport pushin'it
Linear Mode
