Her new owner repaired her, and she entered mercantile service as SS
Olean in 1925. By 1930, she was sailing for the
Vacuum Oil Company, Another death of an
Olean crewman was reported by
The New York Times in September 1939, when a
fireman aboard the ship was stabbed to death by a mess attendant while the ship was anchored in the
Delaware River at the
Port of Paulsboro. Around the time that the United States entered
World War II in December 1941,
Olean was defensively armed and assigned a crew of four
Naval Armed Guardsmen. On 14 March 1942,
Olean was sailing from Norfolk, Virginia, to
Beaumont, Texas. The ship was sailing unescorted and—according to Theodore Bockhoff, the ship's
master—with all lights extinguished. One survivor, however, reported that a dim light was burning on one of the masts. At 23:05, while near position , about from
Cape Lookout, North Carolina,
Olean was hit in the engine room by a single torpedo launched from under the command of
Kapitänleutnant Erwin Rostin. Damage from the torpedo caused the ship to veer out of control. The Naval Armed Guard spotted
U-158, but were unable to depress their gun far enough to be able to hit the U-boat. At 23:45 the order to abandon ship was given and the 36 officers, men, and gunners took to the lifeboats. As the no. 3 boat reached the water, however, a second torpedo launched by Rostin hit the engine room and destroyed the lifeboat, killing one officer and six men. Lifesaving stations at Cape Lookout and
Fort Macon sent motor launches and were able to rescue the remaining 30 men from
Olean nine hours after the attack, and landed them at
Morehead City. As with her November 1921 fire,
Olean did not sink from the twin torpedo hits. She was towed to Hampton Roads and dry docked, but was declared a
constructive total loss. The need for shipping was great, and despite the severity of
Oleans damage, the ship was acquired by the
War Shipping Administration (WSA) in April 1942. The WSA had the vessel reconditioned and repaired at
Baltimore. The ship was re-engined with a triple-expansion steam engine built in 1941 by
Hooven-Owens-Rentschler of
Hamilton, Ohio. The cylinders of the new engine were 22½, 41½, and 68 inches (57, 105, and 170 cm) in diameter and had a stroke, which generated a nominal . The ship was also re-boilered with two
water tube boilers that had a heating surface of and operated at . The newly reconditioned ship was renamed
Sweep and was employed in duties in the Pacific. == U.S. Navy service, 1944–45 ==