8.9 Drive wheels.............................................................................................................................70
8.9.1 Replacing the drive wheel.............................................................................................70
8.9.2 Replacing a tyre or inner tube.......................................................................................71
8.9.2.1 Replacing puncture-protected tyres.........................................................................71
8.9.2.2 Replacing puncture-proof tyres................................................................................73
8.9.3 Replacing the drive wheel hub......................................................................................74
8.10 Drive unit..................................................................................................................................75
8.10.1 Replacing the motor/transmission unit..........................................................................75
8.10.2 Replacing or rotating the motor / gearbox unit sealing ring ..........................................77
8.10.3 Replacing the motor / gearbox coupling.......................................................................78
8.10.4 Replacing the carbon brushes......................................................................................80
8.11 Replacing the rubber shock absorbers.................................................................................82
8.12 Replacing the tube frame........................................................................................................84
8.13 Replacing the double bearing of the Dual Swing Technology (D.S.T.)..............................86
8.14 Replacing the battery boxes...................................................................................................88
8.15 Seat system..............................................................................................................................89
8.15.1 Replacing the tilt actuator .............................................................................................89
8.15.2 Replacing the tilt module...............................................................................................91
8.15.3 Replacing the lifter / tilt module.....................................................................................93
8.16 Backrest unit............................................................................................................................97
8.16.1 Replacing the standard backrest..................................................................................97
8.16.2 Replacing a standard backrest with quick release........................................................99
8.16.3 Replacing a Flex2 backrest ........................................................................................100
8.16.4 Adjusting backrest former...........................................................................................101
8.17 Seat system Modulite............................................................................................................102
8.17.1 Replacing the tilt actuator ...........................................................................................102
8.17.2 Replacing the lifter actuator........................................................................................103
8.17.3 Replacing the lifter / seat angle adjustment module...................................................104
8.17.4 Replacing the backrest actuator.................................................................................107
8.18 Backrest Modulite..................................................................................................................108
8.18.1 Replacing the standard backrest................................................................................108
8.18.2 Replacing the backrest mounting bracket ..................................................................109
8.18.3 Replacing the backrest mounting bracket for SB 53 ..................................................110
8.19 Adjusting the seat width/ backrest width (Modulite) .........................................................111
8.19.1 Adjusting the seat width..............................................................................................111
8.19.2 Adjusting the backrest width.......................................................................................113
8.19.3 Adjusting the Flex3 backrest.......................................................................................115