11. The design was improved in 1953 with the fitting of shock absorbers between the axle boxes and the bogie frames . 12. The bogie frame is an H-shaped structure of welded construction, with two TE-005 DC traction motors. 13. SBS Transit has withdrawn affected trains while waiting for the bogie frames found in the undercarriage to be replaced as a precautionary measure. 14. The traction motors are flexibly supported by the bogie frame , and are connected to the wheelset mounted reduction gears by a multiple disc coupling. 15. In March 1993, two further underframes were taken and converted to VZZF, for transfer of bogie frames ( without the transferred between gauges. 16. However, while the bogie frames were transferred, it is thought that the AE cars may have retained their spoked wheelsets ( ? ). 17. Once uncoupled, one of the carriage ends is left without a bogie at the split, so a bogie frame is required to support it. 18. The welded bogie frame was derived from Fox's earlier design for Liverpool-Southport electric trains ( later renumbered British Rail Class 502 ). 19. The axle box guide, which is welded to the bogie frame has a polymer washer ( homopolymer acetal guide ) bush fixed at the head. 20. 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.
