Can you show me a diagram on how to put belt on mower deck for a John deere mower 100 series

It doesn't appear to be online. Contact them direct.

https://www.weingartz.com//assembly-diagram/john-deere-parts-lookup/model-z970r-ztrak-r-series-mower-z970r-ztrak-r-series-mower-pc11784-belt-idlers-covers-60-inch-mower-deck-60-inch-tcm12228-040001-/4275-36249-483761

Wiring Harness
https://partscatalog.deere.com/jdrc/navigation/equipment/63884/srch/CHASSIS%20WIRING%20HARNESS%20%28070001%20-%20%29

https://www.deere.com/en/parts-and-service/zero-turn-mowers/commercial-ztrak/z970r/

https://www.google.com/search?q=john+deere+z+trak+970r+wiring+diagram

..

Its on google just found it just put in john deere 777 mower belt track it shows how it goes once you see it its simple to install , you may find it on u tube . I changed my belt bit of a hair pull but once you see it .Its easy .

Here's a link that should help you.
https://www.google.ca/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=john+deere+lx277+mower+deck+belt+diagram
Cheers

Here's a link to an online John Deere parts store. When you land on the page, look at the top sub categories for the size of deck your mower has. You should be able to access a parts diagram with pictures of your belt's proper placement.
http://jdpc.deere.com/jdpc/servlet/com.deere.u90490.partscatalog.view.servlets.HomePageServlet_Alt

Belt path for JD 100 series, 42" cutting deck, 2 blades.

Here is a link to some diagrams. Diagram to install belt on john deere 54 deck mower

Seems Deere didn't put diagrams on their 100 series mowers, just to save a buck I guess?
Sure are a lot of complaints online over it for this to just be a mistake? Not on the deck like most mowers are, not under hood nor under its seat. Simply not on this damn mower.. I got the belt on ok because I've worked on mowers many yrs but some folks may really struggle to do so, what a joke JD is today.

Here is a belt diagram that I drew for a Deere LA175 (100 Series) 54 inch deck.

Ok Simple Rule
V BELTS go in V pulleys
Flat pulleys get the back of the belt. You must take the deck off the tractor to do this properly. Look inside the hood I have seen belt diagrams there or on top of the deck.
When all else fails Go to the JD Dealer they will gladly help.