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How often to lube 550

I am a new owner of a Dillon 550B and I have read the manual. It discusses the lube to use but does not give any indication of how often to lube the shaft or zerk fitting. Any suggestions would be appreciated.

Depends on many factors.  Where you live (heat, water, dust) and how much you use the loader.  Humid climates need oil/grease more often.  Dusty climates cleaning more often and lube.  Dry climates less often.

If you have rust issues then a drop of oil on the shaft before and after each use.  Wipe excess off.   If you live in phoenix then probably once a year. 

The zerk fittings (IE: grease on the link arms and pins) then a small amount of grease once a year (just enough to start pushing out old grease).  If you load a lot then more often.  The interesting part about the arms/pivot pins lack of grease creaps up.  The handle gets harder and harder to cycle and one does not notice until new grease is put in (and/or a full cleaning).  If the handle is not easily moved by using 1 finger, then a bit of grease and maybe a cleaning is in order.  The grease prevents wear as well as helps with smooth handle operation.

Does the Dillon 550c come pre-lubricated?

Yes, mine has a bit of grease coming out as I use it.

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