NORD Drivesystems B2000 - Manual (Page 35)

5. Service and maintenance
www.nord.com B2000-GB-0413 -35-
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 3.14).
Remove dust
(Only necessary for Category 2D)
With gear units fitted with a covering cap (Option H) the covering cap must be removed. 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 3.11). Note: Some covering caps can be completely
sealed with liquid sealing agent. In such cases, there is no need for regular cleaning of the
covering cap if it is completely sealed with a liquid sealing agent such as Loctite 574 or Loxeal
58-14.
Checking the coupling
(Only necessary for Category 2G and IEC/NEMA standard motor attachments)
The motor must be removed. Plastic or elastomer coupling components must be examined for
traces of wear. If the limiting values listed below for the particular coupling versions and sizes
are exceeded, the plastic or elastomer coupling components must be replaced. Caution: only
use replacement parts with the same colour!
With claw couplings (ROTEX

) the tooth thickness of the elastomer gear rim must be measured
as per Figure 5-1. B
min
is the minimum permissible tooth thickness.
Limiting wear values for coupling gear rims
Type R14 R24 R38 R42 R48 R65 R90
B 9.7 8.6 13.3 15.7 17.7 22.2 32.3
Bmin 7.7 5.6 10.3 11.7 13.7 17.2 24.3
Figure 5-1: Measurement of gear rim wear with ROTEX

claw couplings
For gear couplings, the limiting wear value is X = 0.8 mm, as per Figure 5-2.
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.
Danger!
Dust deposits on the gear unit housing must be removed if they are more than 5 mm
thick.