One of my flywheels was slightly different from the other; there was a small "scoop" in the outer
edge of the flywheel for Deck #2. If yours is the same way, pay attention to that on reassembly.
Now that the flywheels are removed, clean the small idler wheels that were hidden. There are two
idler wheels for each tape deck. It probably wouldn't hurt to clean the plastic on the flywheel too.
Once the idlers are clean, inspect the entire tape deck mechanism for dust, dirt, and general grime.
Clean it now before reassembly.