Bosch BDU3740 Manual de usuario
Robert Bosch GmbH
72757 Reutlingen
Germany
www.bosch-ebike.com
0 275 U07 3D1 (2021.06) T / 32
en Original operating instructions
fr Notice d'utilisation d'origine
es Instrucciones de servicio originales
Ownerʼs Manual – The Bosch Drive System
Drive Unit
BDU3740 | BDU3741
Performance Line CXPerformance Line CX
This manual contains important safety,
performance and service information.
Read and understand it along with the
information provided to you by your
bicycle manufacturer before using the
product, and keep it for reference.
Cette notice contient d'importantes
informationes sur la sécurité, les
performances et l'entretien. Lisez-les et
comprenez-les ainsi que les informations
fournies par le fabricant de votre vélo
avant d'utiliser le produit, et conservez-
les pour référence ultérieure.
Este manual contiene información
importante de seguridad, rendimiento y
mantenimiento. Léalo y asegúrese de
entenderlo junto con la información que
le ha facilitado el fabricante de su
bicicleta antes de usar el producto;
guárdelo a modo de referencia.
0 275 U07 3D1 | (23.06.2021) Bosch eBike Systems
English – 1
Table of Contents
Introduction ..................................................................................................................................... 2
About Warnings............................................................................................................................ 2
General Warnings ......................................................................................................................... 2
Using your Manual ........................................................................................................................ 3
Operating your Bosch Drive Unit.......................................................................................................... 4
Safety instructions........................................................................................................................ 4
Product description and specifications ............................................................................................ 6
Assembly .................................................................................................................................... 7
Operation.................................................................................................................................... 7
Maintenance/Cleaning................................................................................................................... 9
Bosch eBike Systems 0 275 U07 3D1 | (23.06.2021)
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Introduction
About Warnings
This manual contains many DANGER, WARNING,
and CAUTION indicators concerning the conse-
quences of failure to use, assemble, maintain, store,
inspect and dispose of a Bosch-equipped eBike in a
safe manner.
– The combination of the safety alert symbol and the
word DANGER indicates a hazardous situation
that, if not avoided, will result in death or serious
injury.
– The combination of the safety alert symbol and the
word WARNING indicates a hazardous situation
that, if not avoided, could result in death or serious
injury.
– The combination of the safety alert symbol and the
word CAUTION indicates a hazardous situation
that, if not avoided, could result in minor or moder-
ate injury.
General Warnings
Read all safety warnings and all in-
structions. Failure to follow the warn-
ings and instructions may result in
death or serious injury.
Save all safety warnings and instructions for fu-
ture reference.
The term battery pack used in these operating in-
structions refers to all original Bosch eBike battery
packs.
WARNING
uThis manual contains important safety, perfor-
mance and service information. Read it before
you take the first ride on your new bicycle, and
keep it for reference. The manual can also be found
online at www.bosch-ebike.com.
uThis manual is intended to be read together with
the separate user manual provided with your bi-
cycle. Be sure to read all provided documents in-
cluding labels on the product before your first ride.
uRead ALL accompanying manuals before riding
the bike for the first time. Your Bosch Drive Sys-
tem comes with additional manuals and documents
provided by the manufacturer of the bicycle and
other components. Failure to read and understand
safety information can result in death or serious in-
jury.
uTake responsibility for your own SAFETY. If you
have any questions or do not understand some-
thing, consult with your dealer or the bicycle or
component manufacturer.
uSome eBike accessories may present a choking
hazard to small children. Keep these accessories
away from children.
CAUTION
uThe Bosch Drive System adds weight to your bi-
cycle which you may not be used to lift. Avoid in-
jury, use proper lifting techniques.
0 275 U07 3D1 | (23.06.2021) Bosch eBike Systems
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Using your Manual
In addition to the functions outlined here, changes to
software relating to troubleshooting and functional
modifications may be introduced at any time.
Graphics
The bicycle shown in this manual may differ slightly
from your bicycle, but will be similar enough to help
you understand our instructions.
RIGHT-HAND and LEFT-HAND sides are determined
by facing in the direction the bicycle will travel when
going forward. When you see a broken line (------), the
item referred to is hidden from view.
Bosch eBike Systems 0 275 U07 3D1 | (23.06.2021)
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Operating your Bosch Drive Unit
Safety instructions
Read and understand all safety warn-
ings and instructions. Failure to follow
the below warnings could result in death
or serious injury.
Save all safety warnings and instructions for fu-
ture reference.
The term battery pack used in these operating in-
structions refers to all original Bosch eBike battery
packs.
uDo not attempt to change – in particular, to in-
crease – the power of your drive or the maxi-
mum speed that it supports. Doing this may put
yourself and others at risk, and you could also
breach statutory regulations.
uDo not make any modifications to your eBike
system or fit any other products that might in-
crease the performance of your eBike system.
Doing so will generally reduce the service life of the
system and risks damaging the drive unit and the
bike. You also run the risk of losing the guarantee
and warranty claims on the bicycle you have pur-
chased. By handling the system improperly you are
also endangering your safety and that of other road
users, thus running the risk of high personal liability
costs and possibly even criminal prosecution in the
event of accidents that can be attributed to manip-
ulation of the bicycle.
uDo not open the drive unit yourself. The drive
unit must only be repaired by qualified person-
nel using only original spare parts. This will en-
sure that the safety of the drive unit is maintained.
Unauthorized opening of the drive unit will render
warranty claims null and void.
uAll components fitted to the drive unit and all
other components of the eBike drive (e.g. chain-
ring, chainring receptacle, pedals) must only be
replaced with identical components or compo-
nents that have been specifically approved by
the manufacturer for your eBike. This will protect
the drive unit from overloading and becoming dam-
aged.
uRemove the battery from the eBike before be-
ginning work (e.g. inspection, repair, assembly,
maintenance, work on the chain, etc.) on the
eBike, transporting it with a car or airplane, or
storing it. Unintentional activation of the eBike
system poses a risk of injury.
Under extreme conditions, such as con-
tinuously high loads at low speed when
riding up hills or carrying loads, parts of
the drive unit can reach temperatures
in excess of140°F.
uAfter a ride, do not allow your unprotected
hands or legs to come into contact with the
housing of the drive unit. Under extreme condi-
tions, such as continuously high torques at low
travel speeds, or when riding up hills or carrying
loads, very high temperatures may be reached on
the housing.
The temperatures that may be reached on the drive
unit housing are influenced by the following factors:
– Ambient temperature
– Ride profile (route/gradient)
– Ride duration
– Assistance modes
– User behavior (personal effort)
– Total weight (rider, eBike, luggage)
– Motor cover on the drive unit
– Heat dissipation properties of the bicycle frame
– Type of drive unit and type of gear-shifting
uUse only original Bosch batteries that the manu-
facturer has approved for your eBike. Using
other batteries can lead to injuries and pose a fire
hazard. Bosch accepts no liability or warranty
claims if other batteries are used.
0 275 U07 3D1 | (23.06.2021) Bosch eBike Systems
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Keep the magnet away from implants
and other medical devices, such as
pacemakers and insulin pumps. The
magnet creates a field which can impair
the function of implants or medical de-
vices.
uKeep the magnet away from magnetic data car-
riers and magnetically sensitive devices. The ef-
fect of the magnets may lead to irreversible data
losses.
uObserve all national regulations which set out
the approved use of eBikes.
uPlease observe all local, state and federal regu-
lations when registering and using eBikes.
Privacy notice
When you connect the eBike to theBosch Diagnos-
ticTool3, data about Bosch drive unit (e.g. energy
consumption, temperature, etc.) is transferred to
Bosch eBike Systems (Robert Bosch GmbH) for the
purposes of product improvement. You can find more
information about this on the Bosch eBike website at
www.bosch-ebike.com.
Bosch eBike Systems 0 275 U07 3D1 | (23.06.2021)
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Product description and specifications
Intended use
The drive unit is intended exclusively for driving your
eBike and must not be used for any other purpose.
In addition to the functions outlined here, changes to
software relating to troubleshooting and functional
modifications may be introduced at any time.
Technical data
Drive unit Drive Unit
Performance Line CX
Product code BDU3740
BDU3741
Continuous rated power W 250
Torque at drive, max. Nm 85
Rated voltage V= 36
Operating temperature °F 23to104
Storage temperature °F 50to104
Protection rating IP54
Weight, approx. lbs 6.6
The Bosch eBike system uses FreeRTOS
(seehttp://www.freertos.org).
Bicycle lightsA)
Voltage approx.B) V= 12
Maximum power
– Front light W 17.4
– Rear light W 0.6
A) Depends on legal regulations, not possible in all country-
specific models via the eBike battery
B) When changing the bulbs, ensure that they are compatible
with the Bosch eBike system (ask your bicycle dealer) and
are suitable for the specified voltage. Bulbs must only be re-
placed with bulbs of the same voltage.
Inserting a bulb incorrectly can cause it to blow.
0 275 U07 3D1 | (23.06.2021) Bosch eBike Systems
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Assembly
Checking the speed sensor (see figure A)
2–8 mm
2–8 mm
2–8 mm
5–15 mm
(1)
(1)
(3)
(2)
(4)
A
(1) Speed sensor a)
(2) Spoke magnet
(3) CenterLock magnet b)
(4) Rim magnet
a) Different sensor shape and installation position possible
b) a different installation position is possible
Speed Sensor (slim)
The speed sensor(1) and its CenterLock magnet(3)
or spoke magnet(2) are mounted ex works in such a
manner that the magnet, after a turn of the wheel,
moves past the speed sensor with a clearance of at
least 2mm, yet no more than 15mm.
The correct distance between the magnet and sensor
must be maintained (see figureA) if design changes
are made.
Notes: Ensure that you do not damage the sensor or
sensor bracket when fitting or removing the rear
wheel.
When changing a wheel, make sure that the sensor
cable is routed so that it is not under tension and has
no kinks.
The CenterLock magnet(3) can only be removed and
reinserted up to five times.
Rim magnet
When installing a rim magnet, no sensor is required to
detect a wheel turn. The drive unit itself detects when
the magnet is close to it and calculates the speed and
any other data required from the frequency of the
emergence of the magnet field.
Since the drive unit is sensitive to magnetic fields,
avoid other magnetic fields in the vicinity of the drive
unit (e.g. magnetic clipless pedals, magnetic cadence
sensors, etc.) in order to prevent disruption to the
drive unit.
Operation
An operating unit is required for the starting opera-
tion of the eBike system. Observe the starting opera-
tion for the eBike system and drive unit control in the
operating unit operating instructions.
Notes on cycling with the eBike system
Note: The eBike system always starts with assistance
levelOFF.
When does the eBike drive work?
The eBike drive assists your cycling only when you are
pedaling. If you do not pedal, the assistance will not
work. The motor output always depends on the pedal-
ing force you apply.
If you apply less force, you will receive less assistance
than if you apply a lot of force. This applies irrespec-
tive of the assistance level.
The eBike drive automatically switches off at speeds
over 20mph. When the speed falls below 20mph,
the drive automatically becomes available again.
An exception applies to the push assistance function,
in which the eBike can be pushed at low speed with-
out pedaling. The pedals may rotate when the push
assistance is in use.
You can also use the eBike as a normal bicycle with-
out assistance at any time, either by switching off the
eBike system or by setting the assistance level to
OFF. The same applies when the battery is drained.
Bosch eBike Systems 0 275 U07 3D1 | (23.06.2021)
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Interaction between the eBike system and gear-
shifting
The gear-shifting should be used with an eBike drive
in the same way as with a normal bicycle (observe the
operating instructions of your eBike on this point).
Irrespective of the type of gear-shifting, it is advisable
to briefly stop pedaling when changing gear. This will
facilitate the gear change and reduce wear on the
powertrain.
By selecting the correct gear, you can increase your
speed and range while applying the same amount of
force.
Gaining initial experience
We recommend that you gain initial experience with
the eBike away from busy roads.
Test the various assistance levels, beginning with the
lowest level. As soon as you feel confident, you can
ride your eBike in traffic like any other bicycle.
Test the range of your eBike in different conditions
before planning longer and more demanding trips.
Influences on range
The range is affected by a number of factors, such as:
– Assistance level
– Speed
– Gear shifting behavior
– Tire type and tire pressure
– Age and condition of the battery
– Route profile (gradients) and conditions (road sur-
face)
– Headwind and ambient temperature
– Weight of eBike, rider and luggage
For this reason, it is not possible to predict the range
accurately before and during a trip. However, as a
general rule:
– With the same assistance level on the eBike drive:
The less energy you need to exert in order to reach
a certain speed (e.g. by changing gears optimally),
the less energy the eBike drive will consume and
the higher the range per battery charge will be.
– The higher the selected assistance level under oth-
erwise constant conditions, the smaller the range
will be.
0 275 U07 3D1 | (23.06.2021) Bosch eBike Systems
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