Hansen P4 Multistage Gear Units

How often do I change the oil?

The first oil change should be carried out preferably after 100 hours and not more than 800 hours of operation.  The removed oil may be used again after filtering.  Filter the oil volume at least 10 times using a 10mm filter or smaller.  Subsequently the oil should be renewed after 4000 to 8000 hours or maximum of 18 months of operation depending on working conditions.  Please refer to service manual for detailed oil change instructions.

What type of lubrication method does the P4 use?
What type of lubrication should be used?
What are backstops?
How often do I change the oil?

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