Pennsylvania 0-4-0 "Switcher" Locomotives in the USA

Class Q/A1 (Locobase 1154)

Light-duty saddle-tank switcher in warehouses. Built at both Altoona and Wilmington.

Data from [] (Viewed September 2002).. Class data from Bob Berkey's The Broad Way website. [] (visited 16 February 2003).

Apparently, this class quickly met its match in ever-increasing locomotive weights. The Pennsy sold several to other users beginning with Bellaire Steel Company in August 1899.E H Wilson bought two, one in May 1900 and one in February 1906. Woodruff & Pausch Stone Company bought an A1 in January 1909.

Two remaining engines were dropped in November 1902, but the 1720 somehow endured until April 1925.

Class U/A3 (Locobase 1155)

Class data from Bob Berkey's The Broad Way website. [] (visited 16 February 2003); and "No 109-C-- Classification and Description of Locomotivcs", 1 March 1904, Pennsylvania Railroad Company, supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange collection.

At the time of the U class's introduction, these were regarded as heavy-service switchers. Like most PRR designs, these burned fuel in Belpaire fireboxes that were scarcely visible in the large cabs.

Virtually all were converted to A-3a saddle tank engines, which saw the removal of the double-bogie slopeback tender. The work led to a weight increase to 98,600 lb (43,363 kg). about 8 short tons higher. Maximum axle loading now totaled 51,000 lb (23,133 kg).

All were withdrawn by 1920.