BR/BD 100/250 R BP / RI Basic settings and service proceduresPage 111 / 171Service Manual 08.20075.4.6 Wheel hub motor tyres (M1)Check/replace carbon brushes– Remove carbon brush cover (2).– Remove the retaining screw (6) from thecarbon brush (5).– Pull out the carbon brush (5).– Check the wear dimension of the carbon brush(5):– The length of the carbon brush (5) used mustbe at least 50% of the new carbon brush:– Drive motor (125A): 12 mm (0.473 in).– Drive motor (180A): 16 mm (0.630 in).Replace if necessary.Wheel hub motor (M1)Screw plug4123651 Steering head2 Carbon brush cover3 Electromagnetic brake (Y1)4 Front wheel5 Carbon brush, wheel hub motor (M1)6 Retaining screw, carbon brush7 Transmission oil screw plug (400 ccmmineral oil, viscosity ISO VG 220, e.g.Shell Omala 220)7Note:When inserting the carbon brush (5) ensurethat the contact spring presses on the carbonbrush.
