Employees at Cummins in Columbus are deciding whether to continue working under their current contract.
The Diesel Workers Union was overseeing a strike authorization vote Friday at its union hall in Columbus. It started early Thursday and ends Friday at 7 p.m.
The union's bargaining committee urged all its members to vote and said hours were being extended to accommodate them.
Last month, union officials announced that most of their members rejected a contract.
Cummins and union officials didn’t immediately respond to messages.
Last summer, the engine manufacturer announced it was laying off workers.
Read more: Cummins says layoffs are to meet zero-emission goals
