Regarding the question abolut my Personal Pace Mower the problem WAS NOT .?

The problem about my Toro was not resolved. I received an answer but that did not help. My question was I had a bearing failure in the gear box of my Personal Pace Mower. I took out the ring gear and pinion. I replaced the whole gear box and axel shaft. It came as an assembly. Sonance I replaced it, I cannot seem to get the mower to run on the grass. On concrete it runs fine. I replaced the belt. The spring is attached to the arm that moves the gear box which rotates the gear box on the axel which tightens the belt. I did not leave the spring off. The spring is fastened to the cable and is not removable. Also I did put the pulley on .correctly. This mower has 2 belts. The inner belt goes on the smaller pulley. This goes to the transmission pulley The outer belt which is shorter goes to the larger pulley for the blade override.