Works on non solid compacting where it goes down and comes back up, but on solid compacting it goes down part way and then makes a loud noise sort of like a gear slipping or banging. I have cheked that there is no obstruction in its way and it is clear of any debri. When brought back up from that position it does not seem to sense where to stop or turn off automatically.

What is the easiest way to access the power nuts, part no. 12, on the diagram when replacing them. It seems that just removing the top cover does not allow enough access, must the sides be removed also.