Drive Motor *As measured manually on standard trucks. As measured by the Brush Wear Indicator (BWI) on Superior (S) option trucks. **All rough edges (burrs) must be removed after the commutator is machined. Machine chamfer on the commutator bars ...0.40 mm Maximum difference between bar to bar .......................................0.005 mm (.0002 in.) TIR Torque for the terminal bolts (not shown) that hold (.016 in.) Thermal switch (not shown) [Superior (S) Option. only]:
cable connections ...............................12 NҐm (9 lbҐft) Depth of the insulation below commutator bars ....................................................1.0 mm (.04 in.) Opening temperature...........150 L 6ЎC (302 L 11ЎF) Closing temperature ...........130 L 7ЎC (266 L 13ЎF) Width of the insulation below commutator bars ................................................0.76 mm (.030 in.) Thermal switch (Not Shown)[Standard only] Opening Temperature ............135 L 4Ў (275 L 10ЎF) Maximum difference between commutator high and low point (out of round) ...........0.03 mm (.001 in.) TIR Closing Temperature ..............118 L 6Ў (244 L 11ЎF) Power Train Specifications 30 Drive Motors Model Voltage (1)New Brush Size Thickness B width B length Br Minimum ush Length* (2)New Commutator Diameter Minimum Commutator Diameter** B20S-2, B25S-2 B30S-2 36/48 12.5 mm B 25.0 mm B 45.8 mm (.49 in.
B 0.98 in. B 1.8 in.) 19.0 mm (.75 in.) 117.4 mm (4.62 in.) 111.0 mm (4.37 in.) BC20S-2, BC25S-2, BC30S-2 36/48 16.0 mm B 28.0 mm B 45.8 mm (.63 in. B 1.10 in. B 1.80 in.) 19.0 mm (.75 in.) 119.0 mm (4.69 in.) 111.0 mm (4.37 in.) B20S, B25S B30S, BC20S BC25S, BC30S 72/80 12.5 mm B 40.0 mm B 45.8 mm (.49 in. B 1.57 in. B 1.8 in.) 19.0 mm (.75 in.) 117.4 mm (4.62 in.) 111.0 mm (4.37 in.)