Repairing A Puncture; Opening The Brake; Opening The Cantilever Or V-Brake; Removing The Hydraulic Rim Brake - Bosch Drive Unit Speed Manual Original

To inflate an inner tube with a Sclaverand or road valve,
proceed as follows:
› Unscrew the valve cap anticlockwise with your
fingers.
› Unscrew the knurled nut anticlockwise.
› Push the knurled nut with your finger briefly into
the valve until air escapes.
› Inflate the inner tube using a suitable tyre pump.
› Screw the knurled nut back down.
› Screw the cap clockwise back onto the valve.
Ask a specialist cycle shop for advice on which tyre
pump is suitable for your valve.
To inflate an inner tube with a Dunlop/Woods valve or
Schrader/car valve proceed as follows:
› Unscrew the valve cap anticlockwise.
› Inflate the inner tube using a suitable tyre pump.
› Screw the cap clockwise back onto the valve.
24 I General User Manual

18 Repairing a puncture

To repair a puncture, you will need the following equip-
ment:
• Plastic tyre lever
• Patches
• Rubber solution
• Sandpaper
• Spare inner tube, if required
• Spare valve, if required
• Open-ended spanner (if your bike is not equipped
with a quick-release device)
• Tyre pump
We recommend you remove the defective wheel first. Open
or remove the brake beforehand. The procedure for this
depends on the type of bike brake that is installed.
Read the chapter on brakes before removing the brake
as otherwise you could damage the brake system and
this could lead to accidents.

18.1 Opening the brake

18.1.1 Opening the cantilever or V-brake

› Grip the wheel with one hand.
› Squeeze the brake pads or brake arms against the
rim.
› Detach the brake cable at one of the brake arms.

18.1.2 Removing the hydraulic rim brake

› If quick-release brake mechanisms are fitted, re-
move a brake unit (see ➠ Chapter 9.2.2 "Operating
the quick-release device").
› If no quick-release brake mechanisms are fitted,
deflate the tyre.