Hansen P4 Service Manual page 14

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6.2. FORCED FEED LUBRICATION
All rotating elements above oil bath level are lubricated by a gear pump forcing the oil through
pressure lines.
Pumps can be either of the integral type, driven by one of the gear unit shafts, or a motorpump.
The integral type pumps are always provided with a built-in reversing device for operation in
both directions.
In case of motorpumps the direction of rotation is always indicated.
Built-on pumps reach their normal operating capacity already after a few seconds. However, in
order to avoid unwanted alarm during the start-up period, we recommend to delay the triggering
of the warning signal by 5 to 10 seconds.
Motorpumps should be switched on at least one minute before starting the
gear unit.
6.2.1. Circulation lubrication
- With integral pump (fig. 4).
The circulation lubrication system consists of
- a pump P
- a filter F with bypass (standard from gear unit size G onwards)
- a flow switch Mf (standard from gear unit size G onwards)
Flow switch must be wired in a circuit to automatically stop the main drive
motor when oil flow drops below alarm setting.
- With motorpump
The service manual of the lubrication and cooling system gives detailed information about the
circulation lubrication system with motorpump.
Fig. 4
6.2.2. Pressure lubrication
The service manual of the lubrication and cooling system gives detailed information about the
pressure lubrication system.
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