nord 6052902/0213, Manual With Installation Instructions

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5 Service and maintenance
B 1050 en-3921 79
5.2.5.4 Oil level tanks (Option: OT)
NOTICE
Damage to the gear unit due to low oil level
An oil level below the Min marking may indicate a leak. This may result in damage to the gear unit.
• Clarify and remedy the reason for the incorrect oil level.
NOTICE
Damage to the gear unit due to high oil level
If the gear unit is delivered with oil and installation position M5 the oil reservoir tank vessel is
completely filled by NORD. High oil levels may result in damage to the gear unit.
• Ensure the correct oil level prior to commissioning.
Check the oil level prior to commissioning. A gear unit which is in operation must be shut down at least
20 to 30 minutes before checking the oil level.
The oil level must be checked with the gear unit at a standstill and with foam-free oil in the installation
position stated on the name plate.
If the oil level is below the minimum level (lower edge of the inspection window), the oil level must be
corrected by topping up with lubricant.
a. Oil reservoir tank and dipstick (standard configuration) (characteristic: cylindrical container): The
oil level must be checked with the aid of the dipstick plug (thread G1¼) in the oil tank. The
sequence is as described in the previous section.
b. Oil reservoir tank and oil level indicator (standard configuration) (characteristic: rectangular
container): The oil level can be seen directly in the window. The correct oil level is the middle of
the oil level indicator.
After correction of the oil level, oil level screws, dipsticks, vents and oil drain screws which have been
unscrewed must be screwed in again and tightened with the correct torques (see Section 7.4 "Screw
tightening torques").
5.2.5.5 Checking the leak indicator (Option: VL3, KL3 with Drywell)
The leak indicator enables detection of leaks before oil escapes from the gear unit. The leak indicator
must be checked at the intervals which are stated in the service schedule.
1. Check whether oil can be seen inside or outside of the leak indicator. If no oil is visible, no further
measures are necessary.
2. If oil is visible in the leak indicator, remove the leak indicator cover cap and catch the escaping oil
in a suitable container.
– Often there is only a temporary fault in the sealing system, e.g. due to small particles of dirt
underneath the sealing lip, which can be removed during further operation. In this case, the
quantity of oil which has escaped by the next interval is smaller or no oil has escaped. A repair
is not necessary at this time.
– If a larger quantity of oil has escaped by the next interval, there is a permanent malfunction of
the sealing system, which must be repaired. In this case, please contact NORD Service.