Noslen,
The W0000581 would be the correct belt for your coach.
Instruction on how to install
( Judy smitherman, 09/14/2015 )Judy,
In the pictures of this product it shows the belt routing, however, if you want detailed description on replacement you will want to download the Engine Service Manual for the appropriate year and model of your chassis. You can find those manuals by clicking here: Workhorse Service Manuals