How do I repair a leaking drum trap?

How do I repair a leaking drum trap?
That depends on what's leaking. The top cover or the connections.

How do I repair a leaking drum trap?

You don't. Get rid of it and replace it with an up to date trap.

But he didn't ask for a replacement did he? Around here we give the asker what he's asking for. We may suggest replacing the trap but this may prove too difficult for the asker.

U are right he didn't... but with your wisdom you should also know chances of doing a repair on a drum... regardless of where it is leaking... just my opinion though...