Gear Unit With Cooling Coil Or Add­on Oil­supply System; Gear Unit With Cooling Coil Or External Oil­supply System; Gear Unit With External Oil­supply System; Pre­lubrication Phase - Siemens FLENDER K1N Assembly And Operating Instructions Manual

7.2.3 Gear unit with cooling coil or add­on oil­supply system
The permissible pressure and temperature values specified in the data sheet and/or list of
equipment must not be exceeded.
This is to be checked before the start­up.
• Fully open the stop valves in the coolant in­ and outflow pipes of the cooling system.
• Check that connecting lines are correctly fastened and tight.
For connection dimensions, refer to the dimensioned drawing of the gear unit. The required
cooling­water quantity and the maximum permissible inlet temperature are given on the data
sheet and/or the list of equipment.
7.2.4 Gear unit with cooling coil or external oil­supply system
For technical data, refer to the data sheet and/or the list of equipment.
Fully open the stop valves in the coolant in­ and outflow pipes of the cooling system.
After starting up the external oil­supply system for the first time the oil level must be
once more checked in accordance with item 7.2.1.
7.2.5 Gear unit with external oil­supply system
7.2.5.1 Pre­lubrication phase
• Prior to start­up, the gear unit should be prelubricated for approx. 3 minutes by means of the oil­supply
system.
• During this time, rolling bearings and gear teeth will be adequately supplied with oil for start­up.
The pre­lubrication phase must not take longer than 3 minutes since there will be heavy
foaming of the oil at low temperatures. If the oil temperature is < 10 °C the oil should be heated
up applying suitable measures, or Siemens should be consulted.
Be sure to observe the operating instructions of the oil­supply system for operation and
maintenance.

7.2.5.2 Initial operation

• Adhere to instructions.
• Start the gear unit.
A no­load run of the gear unit should be limited to a minimum time. During this time, the following points
have to be observed:
─ Oil level
After the first run the oil level will fall. As the gear unit continues to heat up, the oil level will rise to the
level of the mark showing the operating oil level.
If the gear unit does not heat up with too low load drop, the cooling­water supply should be restricted.
This will reduce foaming of the oil.
─ Oil leakage
Screw joints should be checked for oil leakage and, if necessary, resealed!
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