It is not too hard, but fairly involved. Read about it in the manual first. The only special tools that would be good to have is the IP lock tool and maybe the drip spout for timming. This would be a very odd and rare failure mode. I'd sure do some double checking before pulling the pump.

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Bob D.
Parrish, FL
1 SDL, 1 D, 1 TD, 1 Mog