Bosch eBike Active Line BDU310 - Removing Drive Unit (BDU310;350)

A B C
D
NEWNEW
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6.7 Removing Drive Unit (BDU310/350)
6.7 Removing Drive Unit
(BDU310/350)
Loosening chainring from the spider
The chainring may only be
loosened and tightened by a
trained specialist using the
original Bosch Spider Tool.
1. Dismount the crank arms (Allen
key size 8, M10 x 1, ISIS crank-
puller).
2. Block the rear wheel, e.g.
secure the brake lever with a
cable tie or similar.
3. Use the Spider Tool to unscrew
the spider nut (A).
Left-hand thread!
4. Remove the chain.
5. Remove the O-ring (B) and
carefully check it for damage.
Only reuse O-rings if they are
intact.
6. Remove spider (C) together
with the mounted chainring
(D).
X Allen key size 8
X Standard crank-puller
X Spider Tool
(e.g. X-Tool rev. 1)
Work steps Tool