Where do I find a diagram on how to put belt on mower

Larry, diagram on how to put belt on mower, Check the attached links manual,instruction and guides, Good luck
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http://www.husqvarna.com/ddoc/husi/husi2011_naen/husi2011_naen_lgt2654_532446566.pdf
http://www.fixya.com/fullimage.html?src=http://i.fixya.net/uploads/images/deeb035.jpg
http://www.searspartsdirect.com/model-number/gth2654/3199/1509200.html

Google your make and model and which belt (deck belt or drive belt) you can try searspartsdirect.com or jackssmallengine.com both have parts diagrams that show belt routing as well.