I think your day of week is off by one. Tuesday is 2, since Sunday is 0. You can use names, which are a bit more readable. At least, that's what my man page says on Ubuntu.
Actually, I avoid running cron jobs directly on the hour (or small fractions thereof). Too many other people schedule their jobs that way, and it leads to load average spikes at those times. Maybe it's time to update cron with load balancing heuristics.