The bogies were a fabricated steel design, with coil spring primary suspension. The traction motors and gearboxes (one per axle) were mounted to the bogie frame and connected to the wheels by a flexibly coupled quill drive. Traction links were connected to the bogie frame at a height of above rail. The locomotive superstructure is supported on coil springs on a central swing bolster, and the centre bogie allows of lateral movement to negotiate small-radius curves. Yaw dampers are also fitted.