164 | DriveUnit Speedsensor | 165
8
–
14 mm
Work steps
X Allenkeysize8
X Torquewrench
X SpidertoolforBDU4xx,
availablefromtheBosch
eBikeB2Bonlinestore
X Bearinggreaseandbrush
Tools
X Lockring:30 Nm
X Crank:according to
manufacturer's specications
Tightening torques
Installing Drive Unit (BDU450 CX /
490P)
Fit the spider to the
Drive Unit
1. Mounttheleft-sidecrankarm.
Todothis,greasethebottom
bracketshaftandthentighten
boltM15x1.Tightenusinga
torquewrench
Makesurenottomixup
theleftandrightcranks!
Pedalscancomelooseif
assembledincorrectly
2. Cleanandgreasetheinternal
interlockofthespider
3. Presschainring alongwith
themountedspider
or
directlymountedchainring
ontothecleanedandlightly
greasedinterlock
.Thespi-
dermustbeonthesideofthe
chainringfacingtowardthe
bike
4. SlidetheO-ring
onasfaras
thespider.OnlyuseO-ringsif
theyareintact!
5. Greasethecleanedlockring
threadsandpushonthelock
ring
.Theletteringonthe
lockringmustbevisible
Thelockringhasa
left-handthread,so
tightenittotheleftwith
thespidertool.Holdit
backwiththeleftcrank
6. Greasetheright-sidebottom
bracketshaftandmountthe
crankarmwiththecrankbolt
M15x1
X TorxT20
X Phillipsscrewdriversize
PH02
X Torquewrench
X Sensoronframe:3 Nm
X Spokemagnet:1 Nm
Whenreplacingthespoke
magnetonlyuseanorigi-
nalBoschsparepart
(1.270.015.931).Standard
bikecomputermagnetsdo
nothavesufcientmagne-
ticstrength
Work steps Tools
Selected spare parts
Tightening torques
Installing standard
speed sensor
Install standard speed sensor
and spoke magnet
1. Screwthesensorintothe
framethreadprovided.Push
ontheprotectivecap
X Laythecablewithout
kinksand,inparticular,
withouttension;maxi-
mumpermissibletensile
forcebetweenthesen-
sorhousingandthe
cable:15N
X Minimalcablebend
radius:12mm
2. Attachthemagnettothe
spoke:
– Installationposition:inparal-
leloppositethemarking
– Optimumclearance:
8–14mm
(duetoriskof
multiplesignalsordistortion
oftherearwheel)
–Rangeofthemagnet:
5–17mm
– Spokediameter≦2.35mm
3. Ifnecessaryreadjustthesen-
sorwithadditionalspacers
Handling BenetsServiceOverview
Bosch eBike
Introduction
The eBike System 2