BA 5230 en 04/2011
When changing the oil, always refill the gear unit with the same type of oil. Never mix
different types of oil and/or oils made by different manufacturers. Polyglycolbased
synthetic oils in particular must not be mixed with PAObased synthetic oils or mineral
oils. If changing to a different grade or make of oil, the gear unit must, if necessary, be
flushed out with the new oil grade. Flushing is not necessary, if the new service oil is
fully compatible with the old service oil in all respects. Compatibility must be
confirmed by the oil supplier. If there is a change to another oil grade or make, Siemens
recommends flushing out the gear unit with the new grade of service oil.
When changing the oil, the housing and the oilsupply system, if available, must be flushed with
oil to remove sludge, metal particles and oil residue. Use the same type of oil as is used for
normal operation. Highviscosity oils must be heated beforehand using suitable means.
Ensure that all residues have been removed before filling with fresh oil.
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Place a suitable container under the oildraining point of the gearunit housing.
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Unscrew the air filter including reducing screw at the housing top.
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Unscrew the oildrain plug or open oildrain cock and drain the oil into the collecting container.
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Drain the oil from the oilsupply system (see operating instructions to the oilsupply system).
There is a danger of scalding from the hot oil emerging from the housing.
Wear protective gloves.
Any oil spillage must be removed immediately with an oilbinding agent.
Check the condition of the sealing ring (the sealing ring is vulcanised onto the oildrain plug).
If necessary, use a new oildrain plug.
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Screw in the oildrain plug or reclose the oildrain cock.
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Clean the oil filter in the oilcooling system (see operating instructions to the oilsupply system).
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Clean the air filter (see item 10.2.3).
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Screw in the air filter including reducing screw.
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Fill fresh oil into the gear unit (see item 7.1.2).
10.2.3
Clean the air filter
If a layer of dust has built up, the air filter must be cleaned, whether or not the minimum period
of 3 months has expired.
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Unscrew the air filter including the reducing screw.
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Clean the air filter using a suitable cleaning agent.
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Dry the air filter and/or blow with compressed air.
Be especially careful when cleaning with compressed air.
Wear protective glasses!
Foreign bodies must be prevented from entering the gear unit.
