The SNCB Class 77 (also known as HLD 77 or HLR 77) is a class of 4 axle B'B' diesel hydraulic locomotive designed for shunting and freight work manufactured at the beginning of the 2000s by Siemens Schienenfahrzeugtechnik and later by Vossloh at the Maschinenbau Kiel plant in Kiel, Germany for the National Railway Company of Belgium (SNCB/NMBS).