TP
+
ATEX
Maintenance and disposal
Revision: 04
2022-D020259
en-23
7.2.2 Checking the tightening torques
Screw connections between gearbox and attached component such as motors have to be
calculated, dimensioned, mounted, and tested according to current technological standards. Use
the VDI directives VDI 2862 sheet 2 and VDI 2230 for example.
The tightening torques recommended by us can be found in Chapter 10 "Appendix".
Deviating from the recommendations in Chapter 5 "Assembly", washers may be used if the material
of the screw surface features a too low interface pressure.
The hardness of the washer needs to match the property class of the screw.
Take into account the washer for the screw calculation (joint, additional compression set,
surface pressure under screw head and under washer).
7.2.3 Replacing the gearbox
Replace the gearbox:
- When 90% of the calculated life of the output bearing has been reached (see Chapter 3.6
®
" design).
- At the latest after a total of 20,000 operating hours.
Alternatively, the gearbox can be checked by
WITTENSTEIN alpha GmbH
and if
necessary, approved for further operation.
For removal of the gearbox, please also refer to the Chapter 8 "Disassembly".
7.3
Startup after maintenance work
Clean the outside of the gearbox.
Attach all safety devices.
Do a trial run before releasing the gearbox again for operation.
7.4
Disposal
Dispose of the gearbox at the recycling sites intended for this purpose.
Observe the applicable national regulations concerning disposal.
Consult our Customer Service department for supplementary information on disposal of the
gearbox.
Check the tightening torque of the clamping bolt [H] on the
motor mounting. If, while checking the tightening torque, you
discover that the clamping bolt can be turned further, tighten it
to the prescribed tightening torque.
The value for the tightening torque can also be found in
Chapter 10.1 "Specifications for mounting to a motor".
H
