NORD Drivesystems B2000 - Manual (Page 55)

6. Appendix
www.nord.com B2000-GB-0413 -55-
6.3 Torque values
Bolt Torques [Nm]
Size Screw connections in the strength classes Sealing Threaded pin
8.8 10.9 12.9 screws on coupling
M4 3.2 5 6 - -
M5 6.4 9 11 - 2
M6 11 16 19 - -
M8 27 39 46 11 10
M10 53 78 91 11 17
M12 92 135 155 27 40
M16 230 335 390 - -
M20 460 660 770 - -
M24 790 1150 1300 80 -
M30 1600 2250 2650 170 -
M36 2780 3910 4710 - -
M42 4470 6290 7540 - -
Angled pipe, as
in Figure 4-1
- - - 12 -
G1¼ - - - 20 -
6.4 Troubleshooting
Gear unit malfunctions
Fault Possible cause Remedy
Unusual running noises,
vibrations Oil too low or
bearing damage or
toothed wheel damage Consult NORD Service
Oil escaping from gear unit or
motor Defective seal Consult NORD Service
Oil escaping from
pressure vent Incorrect oil level or incorrect,
contaminated oil or unfavourable
operating conditions Oil change
Use oil expansion tank (Option OA)
Gear unit becomes too hot Unfavourable installation
conditions or gear unit damage Consult NORD Service
Shock when switched on,
vibrations Defective motor coupling or
loose gear unit mounting or
defective rubber element Replace elastomer gear rim, tighten
motor and gear unit fastening bolts,
replace rubber element
Drive shaft does not rotate
although motor is running Fracture in gear unit or
defective motor coupling or
shrink disc slippage Consult NORD Service
Danger!
Warning: shut down the gear unit immediately if any faults occur!