Just did this a few weeks ago. My right hand pump was weeping from the top of the plastic housing, all the fuel line connections where fine.
Theres a couple of straps holding the tank in place, after disconnecting the filler neck joins and canister/fuel line connectors you can move the tank back enough for access.
The pump retaining ring is plastic on these, anyway new seal & pump in place, problem solved!
Fiddliest part was reattaching the filler neck, as it’s plastic wanted to be extra careful not to crack it.
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