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550B Maintenance

I have just taken my 550B out of storage and am cleaning it up for use. The main shaft slides very hard through the frame. Should I remove the shaft for a thorough cleaning, or would simply lubricating it be sufficient?

I did something similar, but the grease in the lower pins was causing grief. So I completely disassembled the lower shaft and other roll pins, cleaned with alcohol, then relubricated with the standard oils/grease, but I've been using sewing machine oil rather than motor oil on the main shaft and it's smooth as butter.

You'll need a realignment tool from Dillon to make sure everything is aligned with the shaft/platform... give em a call and they'll send it to you.

I originally tried to re-lube the main shaft and it improved, but there was still binding and that's why i had to take it all apart, clean it up and then reassemble. So if it's been in storage for quite some time, i'd do a tear down, especially depending on how it's been stored. If you're not comfortable doing this yourself, contact Dillon and they'll do it for a very reasonable price.

I would use a lite lubricant on the main shaft and let it penetrate for awhile before trying to move it. Afterward remove it and clean the bore of the frame and the main shaft and relube. With care these machines last a very long time.  

Good info. I'm in the same boat. Is there a trick to disassembling the bottom end? I got the C-clips off that hold the main pin in place, but it will not budge in trying to slide it out. Do I just need to use brute force to get it out, or could something be binding?

dbowperson

What pin are you talking about? I don't remember any pins on a 550 being held in with c-clips

On older machines the lower end of the link arms are secured to the pivot pin via e-clips.Current design has a somewhat different pin, and nylock nuts secure the link arms.

I am having similar issue and have older 550b with e clips. A look at diagram indicates a set screw that goes into the bottom of the ram. I think this keeps shaft from moving left or right.

I would use a penetrating oil to begin with. The existing lubrication had hardened or dried. Once the ram is loose, Lubricate after each session. Do not forget to grease the pivot.

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