BRUSSELS — European Union officials planned to make a fresh try Tuesday to reach a political accord on desperately needed bailout loans for Greece — an agreement that eluded them last week.

The Irish finance minister, Michael Noonan, said a main point of contention at the meeting in Brussels among officials of the 17 European Union countries that use the euro is whether to give Greece an extra two years to get to a point where it can raise its own funds — and how to finance that extension.