
Operating Instructions
2K120/2K121
Contents
3
1
Preface ................................................................................................................................... 5
1.1
Safety instructions .....................................................................................................................5
1.2
ZF instructions ...........................................................................................................................5
1.3
Service products ........................................................................................................................6
2
Application and Design ............................................................................................................ 7
2.1
Application ................................................................................................................................7
2.2
Features ....................................................................................................................................7
2.3
Design .......................................................................................................................................8
2.4
Technical data ...........................................................................................................................9
2.5
Installation positions ................................................................................................................ 10
3
Initial Installation ................................................................................................................... 11
3.1
Axial runout, radial runout and length tolerances – drive motor ................................................. 11
3.2
Balancing ................................................................................................................................ 12
3.2.1
Semi-key balancing .................................................................................................................. 12
3.2.2
Full-key balancing .................................................................................................................... 12
3.3
Adaptation, motor/gearbox ...................................................................................................... 13
3.3.1
Open design ............................................................................................................................ 13
3.3.2
Enclosed design with hub bearing and oil seal.......................................................................... 14
3.3.3
Closed design (with shaft seal) ................................................................................................. 15
3.3.4
Open design with adapter ring ................................................................................................ 16
3.3.5
Keyless hub ............................................................................................................................. 17
3.4
Gearbox – fit ............................................................................................................................ 18
3.5
Output ..................................................................................................................................... 19
3.5.1
Version with belt output ........................................................................................................... 19
3.5.2
Version with coaxial output ...................................................................................................... 19
3.5.3
Version with TSC ..................................................................................................................... 19
3.6
Electrical connection, gearchange ............................................................................................ 19
3.6.1
Shift unit .................................................................................................................................. 19
3.6.2
Shift logic ................................................................................................................................ 22
3.7
Lubrication .............................................................................................................................. 23
3.7.1
Splash lubrication .................................................................................................................... 23
3.7.2
Recirculating lubrication ........................................................................................................... 23
3.7.3
Ports and connections for lubrication ........................................................................................ 25