 In 1945, New York Air Brake again returned to aiding the United States' war effort in World War II.Up until the end of the war, NYAB became a producer of tank hulls for the Sherman tank, anti-aircraft shells, automatic pilots for aircraft, breech mechanisms for guns, hydraulic pumps for fighter aircraft, and other military hardware and had over 5,000 employees contributing to the war effort in the war-torn Europe by the end of 1944.By the end of the Second World War, New York Air Brake had expanded its product line to include hydraulic aircraft pumps.