ISX15 CM2250 fuel pump timeframe?

[Chamberpains]

It can be rebuilt but more time then not it's completely boat anchor trashed. These pumps are a nightmare scenario when they let loose. But the vast majority hold together just fine. The 400,000 mile service interval ensures that you'll catch a faulty one before it fails. This is the epitome of Preventative Maintenance. If you want to make sure you don't randomly trash your engine then you'll just do the pump rebuild/ replacement and keep on happily trucking not worrying about if it's a problem.