quote:"Don't tighten the receiver cover too much. If you do, it will cause issues exactly as described. Just take the slack out of the receiver screws, don't over tighten."
+1........mine is like 25 years old; tighten the screws more then just touching the receiver, it shuts down the works.
Rather then pulling it apart, a soak of break-free then blow off the excess with air usually dose the job.