I'm going from memory here so bare with me. I think your 40 is just like my 46. There are 3 bolts on each side of the cab. The front one just has a thin rubber pad between the cab and frame. The next one back has a rubber pad and a wood block. At the back behind the seat is where the third one is located. It has a rubber pad, wood block and a spring in side the cab.
You might check the tech tips. I've seen a drawing of how all this goes together somewhere.
Good Luck
George
