BA 9142 en 02/2015
Note
If gear units have oil-supply systems, the oil circuit must be filled additionally. If systems have a motor
pump for the oil circuit, the pump must be turned on briefly.
Note
Oil pumps and parts with drill holes for oil filling that are marked with a special sign have to be filled with
oil before the start-up of the gear unit.
This is done by way of:
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an oil-filling hole on the oil pump of the lubricating system or
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an oil-filling hole on the pressure line or
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an oil-filling hole marked with an instruction plate
These oil-filling holes must be tightly closed to prevent the pump from drawing in air and/or oil from
escaping.
A detailed illustration of the gear unit is contained the drawings in the gear unit documentation.
The gear unit can be filled with oil in different ways, depending on the equipping of the oil-supply system.
•
The oil to be put in must be filtered beforehand with a nominal filter mesh of 25 μm (0.0010 inch).
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If the oil-supply system is equipped with three-way cocks, the gear unit can be filled either through the
three-way cocks of the oil-supply system or through the oil drain cock of the tilting pad thrust bearing
chamber of the gear unit.
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If the oil-supply system is not equipped with three-way cocks, the gear unit is filled through the oil drain
cock of the tilting pad thrust bearing chamber.
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If the oil-supply system is equipped with a tank, the gear unit can be also filled with oil through the oil
tank of the oil-supply system. For this, it is necessary in the meantime to start the low-pressure pump
of the oil-supply system in order to also fill the tilting pad thrust bearing chamber of the gear unit with
oil.
Note
Wherever possible, warm oil (approx. 30 °C to 50 °C) should be used for filling so that the viscosity is
not too high.
Note
The filling must be carried out while the gear unit and the oil-supply system are shut off.
The oil is filled in manually through the oil drain cock of the tilting pad thrust bearing chamber or the
secondary circuit of the oil-supply system. Fill in oil until the required oil level of the gear unit is reached
(MIN and MAX mark on the oil level indicator of the main gear unit, the tilting pad thrust bearing
chamber, see figure Figure 8 in item 7.1.3) and/or the level marked on the oil-supply system (for
models with tank) (also see the operating instructions for the oil-supply system).
If the required oil level is not reached, the oil-supply system cannot be turned on. Keep filling in oil until
the required oil level of the gear unit is reached (MIN and MAX mark on the oil level indicator of the main
gear unit, the tilting pad thrust bearing chamber, see Figure 8 in item 7.1.3) and/or the level marked on
the oil-supply system (for models with tank) when the gear unit is stopped and the oil pump of the
oil-supply system (for models with tank) is in operation (also see the operating instructions for the
oil-supply system).
For the oil-supply system, the oil level is often higher when the oil-supply system is switched off than
when it is turned on, since oil can return from the pipes or hoses. Therefore, the correct oil level must
frequently be reached iteratively in this case.
