Siemens Flender H2NV Series - Removal from Service; Interior Preservation with Preservative Agent During Longer Disuse; Interior­preservation Procedure

44 / 62
BA 5060 EN 04/2011
7.3 Removal from service
• Switch off the drive unit.
Secure the drive unit to prevent it from being started up unintentionally.
Attach a warning notice to the start switch.
In addition the gear unit must be secured to the fan at the output side in such a manner
that the fan cannot drive the gear unit.
In case of types fitted with motor pump:
The motor pump must be allowed to constantly rotate fully in order to achieve optimum
corrosion prevention when the gear unit is stationary. Additionally, at temperatures below zero
the motor pump assists the heat output of the heating elements.
• Start the gear unit and allow it to run briefly (5 to 10 minutes) approx. every 3 weeks (during a shutdown
period no longer than 6 months).
• Treat the gear unit with preservative, see items 7.3.1 and 7.3.2 (before a shutdown period exceeding
6 months). It should be locked to prevent it from turning.
7.3.1 Interior preservation with preservative agent during longer disuse
Before longer shutdown periods gear units with forcedlubrication systems, oil-circulation cooling and/or
noncontacting shaft seals should be filled with preservative agent and run without load.
7.3.1.1 Interiorpreservation procedure
• Stop the gear unit.
• Drain the oil into a suitable container (see section 10, "Maintenance and repair").
• Unscrew the oil dipstick or screw plug.
• Pour in the preservative agent through the hole up to the upper mark on the oil dipstick or to the middle
of the oilsight glass.
For preservative agent see table 4 or 5 in item 4.4.1.
• Screw in the oil dipstick or plug screw.
• Start the gear unit and allow it to idle briefly.
• Unscrew the oildrain plug or open the oildrain cock.
• Drain the preservative agent into a suitable container.
• Dispose of the preservative agent in accordance with the regulations.
There is a risk of scalding from the hot preservative agent draining from the gear unit.
Wear protective gloves!
• Screw in oildrain plug or reclose oildrain cock.
• Replace wetair filter with screw plug.
Before restarting the gear unit, replace the plug screw with the wetair filter. Observe
the instructions in item 7.1.1.
Prior to using the wetair filter, 2 of the 8 sealed bores at the underside of the wetair
filter must be opened.
Preservation of the gear unit by means of a complete oil filling is not permitted.