Last summer we had a belt break on us while traveling north to Oregon on I-5. We first called CAT (the engine is a C7) and they told us that the coach mfg put their own accessories on the engine and therefore the belt can be different than what CAT originally installed. They gave us the part number that they said came was installed on the engine before it went to Monaco. We then called Monaco (Safari's and HR's parent company) and we gave them the coach number and they came back with another serpentine belt part number from the same belt mfg.
So, when we called the ERS to send someone out to replace the belt, we gave them both numbers and sure enough the technician brought both sizes with him.....guess what? Neither were correct. The Technician took the broken belt and went back to NAPA and got the correct size (plus a spare).
So, my point is... you really need to check the belt that is currently on the engine to be absolutely positive that you will be getting the correct replacement.
Ron
Ron & Sandie
2013 Tiffin Phaeton 42LH Cummins ISL 400hp
Toad: 2011 GMC Terrain SLT2
Tow Bar: Sterling AT
Toad Brakes: Unified by U.S. Gear
TPMS: Pressure Pro
Member of: GS, FMCA, Allegro
RETIRED!! How sweet it is....