The city’s longest-serving garbage collector is about to start his 52nd year on the job — and is five years from becoming the oldest city sanitation worker in history.

Seventy-five-year-old Joe Caggiano of Staten Island began working for the Department of Sanitation on Jan. 3, 1966 — back when John Lindsay was mayor and garbagemen swept the streets in three-wheel “Wayne” brooms, which had only one rear wheel.

“It turned on a dime,” he recalled of the historic devices. “It took a week-and-a-half for me to really master that thing.”

Caggiano started out tossing trash into the back of a hopper truck. He now spends most days driving a truck, picking up containers of paper recyclables.

He’s the second-oldest person to work for the city’s sanitation agency — trailing only Louis Gagliotto of Brooklyn, who had 50 years on the job when he retired in 2007 at age 79.

Caggiano, in his 52nd year, was eligible to retire and collect a full pension in 1986. But he saw that as the path to an early grave.

“I feel you have to stay active to stay alive,” he said. “You start getting lazy, eating the wrong food, going to bed late — all of a sudden you’re on a different path and you get sick.”

Before recycling, the old days were less complex, he says, but also less safe, especially on “escalator” trucks that loaded trash on a conveyor belt-like contraption.

“It was really easy to get your arm caught in it and you’d go up the flights,” he recalled. “One guy got pulled up. His hands got caught in it and he was gone.”

Caggiano, who began his career as a technical artist sketching city topographical maps, eventually moved to the Sanitation Department’s drafting unit, where he did graphics for the mayor’s office.

Twenty-two years into that gig, he was transferred again at the age of 50 to collecting trash, in his home borough.

“It didn’t bother me. I was very active outside. I built my own house,” he said.

He credits his dad, who worked 37 years for the Sanitation Department, with his work ethic and encouraging him to follow him.

“He used to tell me: ‘Hard work never killed anybody,’ ” he recalled. “He said, ‘You’re never going to get rich working for the city, but it’s a steady job.’ ”

Caggiano’s son, Joseph Jr., also works for the Sanitation Department. He’s 50 and with a mere 20 years on the job.