NORD Drivesystems B2050 - Manual (Page 35)

5. Service and maintenance
www.nord.com B2050-GB-0613 -35-
Danger!
Installation and maintenance work must only be performed when gear units are at a
standstill. The drive must be isolated and secured to prevent accidental start-up.
Check for running noises
Danger!
If the gear unit produces unusual running noises and/or vibrations, this could indicate
damage to the gear unit. In this case the gear should be shut down and a general
overhaul carried out.
Visual inspection for leaks:
Danger!
The gear unit must be checked for leaks. Attention should be paid to escaping gear oil
and traces of oil on the exterior or underneath the gear unit. In particular, the radial
seals, cover caps, screw plugs, hoses and housing joints should be checked.
If leaks are suspected, the gear unit should be cleaned, the oil level checked (see Section 4.1)
and the gear unit checked again for leaks after approx. 24 hours. If a leak is confirmed (dripped
oil), the gear unit must be repaired immediately. Please contact the NORD service department.
Check the cover and the attachment adapter for dirt (only necessary for Category 2D)
For gear units fitted with a cover (Option H), remove the cover in case of severe soiling. Dust
deposits in the covering cap, on the driven shaft and on the shrink disk must be removed. Then
the covering cap must be fitted (See Section 3.13).
If the interior of the IEC / NEMA adapter is severely soiled, the motor must be removed and the
dust deposits removed from the interior and the coupling. Then fit the motor as described in
Section 3.14.
Visual inspection of the rubber buffer
Gear units with an elastic torque support (Option DG) have rubber elements. If these show
damage such as tears to the rubber surface, the elements must be replaced. Please contact the
NORD service department.
Visual inspection of hose
Gear units with an oil level vessel (Option OT) and external cooling units have rubber hoses. If
damage to the external surface of the hoses as far as where they are inserted occurs, e.g. due
to abrasions, cuts or tears, they must be replaced. Please contact the NORD service
department.