Small Engines (Lawn Mowers, etc.): Snapper Riding Mower - Hydro Drive, grass clippings, hydrogear

Question
After stopping mower to empty grass clippings, mower will not go forward or reverse. I removed mower deck, and drive belt appears to be OK. The mower can be moved regardless of whether the hyro release pin is engaged or not. There was no problem with transmission performance up to this point. It was replaced about 7 years ag0. 1994 Snapper LT 150H422KV, Series 2; Transmission: Hydrogear BDU 10S-120; #706726. Is transmission shot? Help!

Answer
Did you check the transmission fluid level?  Seems funny it would just stop all of a sudden.

Below are some links regarding the transmission:

http://www.sauer-danfoss.com/stellent/groups/publications/documents/product_lite...

Hydro Gear info:
http://en.allexperts.com/q/Small-Engines-Lawn-1746/2008/7/Snapper-transmission-2...

Snapper Manual
http://bsintek.basco.com/BriggsDocumentDisplay/default.aspx?filename=cgeoyJvLlSZ...

Did you check the pump coupler?  I have found loose pumps and bad couplers in the past.

Let me know about the fluid and pump coupler.
Eric