Any helpful info on this would be appreciated.

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I have a john deere 175 hydro should be very similar check out this site
Installation of John Deere 175 Lawn Tractor Drive Belt

Hi,
Pictures available at both are for the 165, 175 and 185 hydros with Eaton pump/motor drives mated to a Peerless transaxle. The one at outdoorpowerinfo.com has several pictures from various angles and while it is not an original equipment belt, it is a fairly bright blue because of the sheath and quite visible.
This is not the only one! A very few late versions of all three models had TuffTorq by Kanzaki transaxles; so be warned.
Peace,
Clarke

My 185 is a 1990 model with the Tufftorq. There is no idler near the engine because the trans pulley shaft is vertical like the engine, so the belt clears the steering shaft. Still need to remove the steering support bracket. Also don't need to remove trans shaft pin and clevis since belt doesn't run up along the side of the trans, it's on top.