Cummins 450 hp main belt

[AikenRacer2]

I am wanting to inspect the main belt on my engine. How in the world do you see it much less change it out! Can only see about 4" of it from underneath and less than that from the hatch in the rear bath floor access. It's a 42RQ Thor Tuscany 2012 tag.

[johnhicks]

Serpentine belts are supposed to be replaced about every three years. After shredding a belt on I-75 that's now my policy.

[enblethen]

Some rigs with closet across the back have engine access through removable floor.

[Racklefratz]

Surely someone knowledgeable will provide helpful information, which I can't. From the Google images I found, this is one of the drawbacks of a rear radiator design, which limits access to the engine compartment.

Our RV is also a 2012, and I share your concern for the condition of the belt. Fortunately, I haven't needed to use it yet, but I made it a priority to buy a spare soon after we bought RV, just in case. If/when one fails, you're dead in the water till it's replaced.