A couple of crooks took off with more than $42,000 after robbing an armed security guard at a Bronx gas station Monday morning, police sources said.

Two men approached the guard in the parking lot of 1237 Jerome Ave. as he was walking back to his Rapid Armored Corp. truck with three bags of loot about 10:35 a.m., a source said.

One of the crooks pulled out a gun and the armed guard surrendered the cash.

The victim was then shoved to the ground and the two suspects swiped his gun before they fled the BP station in a tan 2001 Buick sedan, sources said.

The guard suffered a minor injury during the theft.