Hi endresrk,
Is there any easy trick to get the clamp nut off without a special tool?
The only thing I ever use is the
Maytag Spanner Wrench
This nut has left handed threads on it. Sometime I have to cut them off as they just don't come off even with the right tool, but you really should have the spanner wrench to make sure you get the nut put back on good and tight.
Also, how many parts would I have to replace to stop the leak?
They make a kit (#29 in the attachment) that has every part you need to repair that type of leak.
Here you go..
That clap nut and the other part under it that also screws on are left handed threads.
The part that screws down against the tub seal has a set screw in it. You will have to remove the set screw to remove the old part.
Do not over tighten the part with the set screw. It's easy to over tighten with the spanner wrench.
Just thread it on by hand and give it a light tap with the wrench. The job of the set screw is to hold it in place.
The kit should come with some instructions. I could not find them online tonight, but can scan some from a kit later Monday.
Also if you did not already find it on our home page here is the service manual for that washer.
Lots of good info. These are some of the best washers Maytag ever made.
I have a Maytag washer like yours that is about 12 years old and I will do what ever I can to keep it running. They are great washers.

Let us know if you have any other questions and please let us know how the repair goes.
Good luck,
AJ