BESV TRB1, Technical Manual

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4.2 Spider, chain ring and groove nut
- Brose groove nut (C13572)
- Bottom bracket tool for ISIS bottom bracket
- Standard puller
4.2.1 Removing the spider and chair ring unit
Please follow the manufacturer's instructions
when removing the spider and chain ring unit.

Loosen Brose groove nut with ISIS
bottom bracket tool and remove.
 Place Brose spider removal cap on
hollow shaft.
 Position puller between spider arms.
- Loosen spider and chain ring unit and
remove.
- For more information, see
“Fitting the spi-
der and chain ring
unit” on page 17.
4.3 Motor design covers
- Right-hand motor design cover with 3 x M4x8 hexagon socket screws and 2 x M4x6 hexagon socket
screws (C60330)
- Left-hand motor design cover with 6 x M4x30 hexagon socket screws (C11692)
- SW 3 hexagon socket wrench
4.3.1 Removing the left- and right-hand motor design covers
Secure motor design covers before loosening the hexagon socket screws to prevent them from falling
and getting damaged.
 Loosen and remove hexagon socket screws on both sides.
- For more information, see
“Right-hand motor design cover” on page 16.
- For more information, see
“Left-hand motor design cover” on page 16.
B028-0