Question about pump

Hello. I wasn't sure where to put my question, I hope this is an ok place. I have an Ameda Purely Yours that I bought and used when my son was a baby. I'm not pregnant again and planning to do some pumping, but I'm not sure what I need to check on my pump before I start using it again. It's been in my mom's attic for about 5 years, in the carry tote, inside the original box. I haven't seen it yet, my mom just told me the other day she had found it after we looked a couple weeks ago.

So, my question is - what should I check for? Is there a way to make sure it is clean and sterlie? It was a fairly expensive pump, so I'd hate to have to replace it. Thanks in advance for your time.