This bulletin applies to 2008 Ford F-53 Motorhome Chassis vehicles. Some vehicles built before 5-10-2007 and equipped with a 5.4L or 6.8L engine and single rear wheels (SRW) may exhibit a concern of power steering pump noise while driving and with hotter than normal power steering fluid.
The fix involves replacing the power steering pressure line.
Inspect the line crimp fitting for the Julian date code, and only use a line with a Julian date code greater than 348.
The replacement line is available as P/N 7C3Z-3A719-E.
Perform the power steering system purging and filling procedure as listed in the workshop manual section 211-00.