Get a couple gallons of super purple from the local auto parts store. Put it in a pump sprayer that you would use for round up in the yard. Spray everything you can get it inside the machine and let it sit for a few minutes. Then pull it up on the bank so that the front tires are higher than the rears (drain plugs downhill) and rinse it out with a garden hose. You will need to spend a lot of time rinsing. Once it's dry properly lube everything
A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.