5 Service and maintenance
B 1050 en-1819 81
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5.2.16 V-belts (belt drives)
V-belt pulleys should be visually inspected at regular intervals. In case of severe signs of wear, a V-
groove and profile gauge should be used as an aid to determine the degree of wear.
The belt tension must be checked with a frequency measuring device and corrected as necessary.
If one or more V-belts fail in a multiple groove drive, a new set of V-belts must be fitted. V-belts from
different manufacturers must not be combined to form a set of belts. Before installing new V-belts, it is
essential to check the condition of the V-belt pulleys.
After a running time of approx. 4-5 hours with the drive under full load, the tension of the V-belts must
be checked and re-tensioned as necessary.
NOTICE!
Failure to comply with this will probably result in damage to the belt drive and standstill of the gear unit.
• Cracked or brittle belts should be replaced as quickly as possible.
• Dirt on the belt pulley or the belt causes losses due to friction. Therefore always keep these components
clean and dry.
• Chemical influences may cause damage or breakage of the belt.
Danger of crushing
Risk due to rotating components.
• The protective cover must be correctly installed before re-commissioning.
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5.2.17 General overhaul
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NOTICE! Gear unit damage
Failure to comply with this will result in damage to the gear unit.
• The general overhaul must be carried out by qualified personnel with appropriate equipment in observance of
national regulations and laws. We urgently recommend that the general overhaul is carried out by NORD
Service.
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For this, the gear unit must be fully disassembled and the following work must be carried out:
1. Clean all components of the gear unit
2. Examine all gear unit components for damage
3. All damaged components must be replaced
4. Replace all roller bearings
5. Replace all seals, shaft sealing rings and Nilos rings
6. Optional: Replace the backstop
7. Optional: Replace the elastomers in the coupling
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