NORD Drivesystems B2050 - Manual (Page 36)

5. Service and maintenance
-36- B2050-GB-0613 www.nord.com
Visual inspection of the temperature sticker
(Only necessary for temperature class T4 or max. surface temperature < 135°C)
Danger!
The temperature sticker must be checked that it has not turned black (See Figure 4-3).
If the temperature sticker has turned black, the gear unit has become too hot. In this
case operation of the gear unit must be discontinued immediately.
The cause of overheating must be established. Please contact the NORD service department
immediately. The drive unit must not resume operation before the cause of overheating has
been remedied and renewed overheating can be ruled out. Before recommissioning, a new
temperature sticker must be affixed to the gear unit (See Section 3.16).
Remove dust
(Only necessary for Category 2D)
Danger!
Dust deposits on the gear unit housing must be removed if they are more than 5 mm
thick.
Check the oil level
See Section 4.1
Regreasing
Some gear unit designs (agitator designs VLII and VLIII) are equipped with a regreasing device.
For agitator versions VLII and VLIII, the vent screw located opposite to the grease nipple must
be unscrewed before regreasing. Grease should be injected until a quantity of 20-25g escapes
from the vent hole. After this, the vent plug must be reinserted and tightened.
Remove and dispose of escaping grease. Recommended grease: Petamo GHY 133N (Klüber
Lubrication).
Checking the oil filter
The oil filters are equipped with a visual or electro-mechanical contamination indicator. If
contamination is indicated, the oil filter must be replaced according to the operating instructions
for the particular cooling system or circulation pump.
Cleaning or replacing the vent screw
Unscrew the pressure vent, thoroughly clean the vent screw (e.g. with compressed air) carry out
a function test and fit the vent screw in the same place. If necessary, use a new vent screw.
Check the oil / air cooler
The oil / air cooler must be checked for dirt and leaks. All fan inlets and outlets must be cleaned.
For further information, please refer to the operating instructions for the cooling unit.