D C B A
203
6.10 Installing Drive Unit (BDU250C/255C) 6.10 Installing Drive Unit (BDU250C/255C)
Retrofitting with a chain
guard adapter (optional)
Installing a chain guard will also
require:
X Chain guard adapter (A)
– Available from the bicycle
manufacturers
– Various configurations are
possible, even multi-part
models
X Self-tapping screws (B) M5 x 12
Only use original screws
from chain guard manufac-
turer.
1. Screw on the chain protection
adapter (A) to the screw-on
points provided (self-tapping
screws).
2. Remove the cover ring (C) on
the right design cover (D).
3. Cut out suitable notches on the
cover ring (D).
4. Glue the right cover ring into
the not
ches on the design cover
.
X Torx wrench T20
X Torque wrench
X Chain guard adapter on the
drive unit: According to manu-
facturer's instructions
Work steps Tool
Tightening
torques
6
INSTALLATION/
REMOVAL
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