Gear units – Manual with installation instructions
18 B 1000 en-3921
3.2.2 Storage and downtimes in excess of 3 months
Note the following measures in addition to Section 3.2.1 "General measures".
• Repair damages to the coating. Check if a corrosion protection agent has been applied to the
flange bearing surfaces, the shaft ends and the unpainted surfaces. If required, apply a suitable
corrosion protection agent to the surfaces.
• Seal all openings on the gear unit.
• The output shaft must be rotated by at least one revolution every 3 months so that the contact
position of the gear teeth and the roller bearings are changed.
3.2.3 Storage and downtimes in excess of 9 months
Under certain conditions, storage of 2 to 3 years is possible. The specified storage duration is for
guidance only. The actual storage duration depends on the local conditions. Note the following
measures in addition to Sections 3.2.1 "General measures"and 3.2.2 "Storage and downtimes in
excess of 3 months".
Gear units can be supplied prepared for long-term storage. The gear units are completely filled with
lubricant, have VCI corrosion protection agent mixed with the gear oil or are filled with small quantities
of VCI concentrate. The adhesive label on the housing shows the respective information.
Conditions of the gear unit and storage area for long-term storage prior to commissioning:
• Store the gear unit at a temperature in the range of -5 °C to +40 °C without severe temperature
fluctuations.
• Check if the sealing cord in the vent screw is in place. It must not be removed during storage.
• Store the gear unit in a dry space. With a relative humidity less than 60%, the gear unit can be
stored for up to two years; with a relative humidity less than 50%, storage of up to three years is
possible.
• For gear units, which are filled with VCI concentrate for long-term storage, the VCI concentrate
must be renewed after 2 years and distributed in the oil by rotating the shaft.
• In tropical regions, protect the gear unit against damage by insects.
• Gear unit components such as brakes, couplings, belt drive, and cooling units must be protected
for a long-term storage in accordance to their operation instructions.
In addition to the preparations listed in 4 "Commissioning", the following measures are necessary
before commissioning:
• Check the gear unit for external damage.
• After storage of more than 2 years, or with storage temperatures outside of the permissible range
from -5 °C to +40 °C, replace the lubricant in the gear unit before commissioning.
• If the gear unit is completely filled, the oil level must be reduced according to the mounting position.
For the lubricant quantity and lubricant type, refer to the information on the name plate.
• For gear units without oil filling, the oil level must be refilled and checked according to chapter 5.2.3
"Checking the oil level" before commissioning. The VCI concentrate may remain in the gear unit.
The VCI concentrate is not mixable with polyglycol-based lubricants (PG oils). If PG oils are used,
the VCI concentrate must be removed from the gear unit. When using VCI additive, only use the oil
types which are specified on the name plate and are approved by Getriebebau NORD (see chapter
7.2.2 "Gear oils").
• For the option with manual re-lubrication, switch the bearing grease after a storage of more than 2
years. The service life of the grease is reduced after a storage time or gearbox shutdown of more
than 9 months (see chapter 5.2.6 "Re-greasing (Option: VL2, VL3, W, AI, AN)").
• Gear units filled with VCI concentrate for long-term storage are fully closed. Take care that the vent
is fitted and released as necessary prior to commissioning.
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