Subject: Re: Fan adjustment meadows S4 engine
David,
Yes, you are correct, one half of the clamp will look like a washer, which slides onto he other half of the clamp with the bolt. They can be very tight due to corrosion. "Plus gas" has been known to work, once you have some movement on the eccentric shaft it becomes easier. I would recommend taking the clamp out, cleaning and re-assembly with copper slip. Hope you have success soon.
Regards,
Stephen