Once the brackets are off the tank just pops off with a little coaxing.
Watch on the back where the bolt for the bracket went through because there is a little square sealing ring between the tank and pump body that you don't want to loose unless you have a new one of those also.
Personal preference, but I always put a real thin coating of RTV just on the rounded area where the big o ring slip into the tank edge.
Just a super thin film because not only does it go back together easier, but it helps to prevent any small seepages from imperfections on that surface.
Might want to make sure the pump shaft seal isn't the leak also.
I paid right around 4 bucks for a new shaft seal on Ebay and waited to take the pump off until I had it.:D
