Hi my pump has died shortly after 2 years, so unfortunately out of warranty. I opened up the pump and I am able to get it to run again if I spin the motor with a good push. However, if it starts from 0 rpm then it will not spin unless I give ti that initial push. To me that means it is not loose enough, too much friction for it to overcome the initial start up. Can you suggest what I can do? Maybe WD-40, or will that make the pump worse having that circulate through the system. I don't think I'll be able to get it all out once I apply it.