pushed what button? Where is it located?
1. Lift seat platform to the second position.
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2. Push free-wheeling lever (A) forward to hold release button (B) down.
3. Lower seat before you move the Front Mower.
4. Unlock the park brake (C).
5. Move Front Mower to the desired location.
Click link to see actual pictures...
http://manuals.deere.com/cceomview/OMM144025_H0/Output/144025h05.html#81892