I am new to SW with 2013. I just had another enquiry brilliantly answered. An answer to the following query would save time.

I have imported a truck with some useful items I would like to use in my project. I need the double wheels at the back and also the front wheels as sub-assemblies that I could put on my truck.  The back wheels have two parts, tyre and hub. The front wheels also have a steering location arm.

The back axle, as well as the fifth-wheel (the trailer link), are all part of a chassis part. Click on one bit and the whole lot lights up. How do I get the bits I want out of this and save them?

Thanks