Bosch BDU450 CX Quick Start Manual
Removing/installing drive unit
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Also See for BDU450 CX:
- Original operating instructions (74 pages) ,
- Manual (80 pages) ,
- Original operating instructions (139 pages)
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Removing Drive Unit
(BDU450 CX / 490P)
Work steps
Detach the spider from
the Drive Unit
1. Remove the crank arms
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 lock ring
As it has a left-hand
thread, turn it to the
right
4. Loosen the brake lever again
5. Remove the chain
6. Remove the O-ring and
carefully check it for damage.
Only reuse O-rings if they are
intact
7. Remove the chainring
the mounted spider
Retrofit / replacement of
bearing protection ring
BDU4xx / 374y
Assembly instructions:
X
bosch-ebike.net
→ Service → Technical
Information → Assembly
Instructions
with
Drive Unit | 157
Tools
Allen key size 8
X
Standard crank-puller
X
Spider tool for BDU4xx,
X
available from the Bosch
eBike B2B online store
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Summary of Contents for Bosch BDU450 CX
- Page 1 Drive Unit | 157 Removing Drive Unit (BDU450 CX / 490P) Work steps Tools Detach the spider from Retrofit / replacement of Allen key size 8 the Drive Unit bearing protection ring Standard crank-puller BDU4xx / 374y Spider tool for BDU4xx, 1. Remove the crank arms available from the Bosch Assembly instructions: 2. Block the rear wheel, e.g. eBike B2B online store secure the brake lever with a bosch-ebike.net...
- Page 2 158 | Drive Unit Removing Drive Unit (BDU450 CX / 490P) Work steps Tools Remove the chain guard or Remove the design cover Appropriate tool for chain guard screws chain guide adapter on the chainring side Torx T20 If there is a chain guard or 1. Remove two pan head Torx Side cutters chain guide adapter screws M4 x 12 Small slot-headed screw- 1. Remove the M6 x 10 screws 2. Remove the design cover driver 2.
- Page 3 (CCP) on the Drive Unit 1. Check that all cables are Check and tighten loose screw disconnected. Carefully pull connections between the Drive out all cables as far as possi- Unit and mounting plates ble from the frame interface Assembly instructions: 2. Loosen six M8 x 16 Torx Plus bosch-ebike.net screws in the specified → Service → Technical order to or, alternatively: Information → Assembly Instructions 3. Remove the Drive Unit from If these instructions are the housing without applying followed carefully, the force...
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Page 4: Tightening Torques
160 | Drive Unit Installing Drive Unit (BDU450 CX / 490P) Work steps Tools Insert the Drive Unit Connect the cable Torx Plus 40 connections Torque wrench 1. Place the Drive Unit onto the 1. Secure excess cable lengths frame interface. Do not allow using cable ties cables to pinch 2. Plugs have latching lugs to 2. Loosely screw in six M8 x 16 prevent polarity reversal. Make Torx Plus screws then sure that these point in the tighten them in the specified right direction order to or, alternatively:... - Page 5 Drive Unit | 161 Electrical connections Performance Line CX (BDU450 CX), Performance Line Speed (BDU490P), Cargo Line Cruise (BDU450 CX), Cargo Line Speed (BDU490P) The Drive Unit can be damaged if a plug is connected incorrectly Power Port (12 V) Pos. Connection Colour Voltage Front lamp Blue 12 V 3.3 V / Speed sensor Grey min. 3.1 V Battery Black...
- Page 6 162 | Drive Unit Installing Drive Unit (BDU450 CX / 490P) Work steps Tools Attach the design cover on Attach the design cover Torx T20 the chainring side Torque wrench 1. In the case of an initial assem- bly, remove the protective foil 1. Attach cover to the moun- from the motor head ting plate of the Drive Unit 2. Place the electrical cables 2. Tighten pan head Torx screw around the crank casing to M4 x 12 (self-tapping on...
- Page 7 Drive Unit | 163 Work steps Tools Fit the chain guard or chain Depending on the type of screw guide adapter Torque wrench Optional, if intended by the 2. Use manufacturer-specific bicycle manufacturer screws with shallow heads Available from bike manufactu- Longer screws may be used, rers depending on the chain guard manufacturer 1. Screw the adapter to the screw-on points provided Max. screw-in depth (ISCG 5-compatible) of the threads in the Drive Unit: 8.5 mm Tightening torques Chain guard / chain guide adapter on Drive Unit: accor- ding to manufacturer's specifications, max. 5 Nm...
- Page 8 164 | Drive Unit Installing Drive Unit (BDU450 CX / 490P) Work steps Tools Fit the spider to the Allen key size 8 Drive Unit Torque wrench Spider tool for BDU4xx, 1. Mount the left-side crank arm. 5. Grease the cleaned lock ring available from the Bosch To do this, grease the bottom threads and push on the lock eBike B2B online store bracket shaft and then tighten ring . The lettering on the bolt M15 x 1. Tighten using a lock ring must be visible Bearing grease and brush torque wrench The lock ring has a left-hand thread, so Make sure not to mix up tighten it to the left with the left and right cranks! the spider tool. Hold it...