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Doing an Atlas Tune-up. Can't remove DEC bearing

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#1 gillmj24

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Posted 11 July 2009 - 01:29 PM

I can't get the lower conical Declination bearing out, so I am kind of stuck.

I loosened all the other setscrews around but that isn't helping me at all...

#2 Trebor777

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Posted 11 July 2009 - 01:49 PM

Which step?

http://www.stonyhill...ry.com/eq-6.htm

It's hard to tell exactly what bearing you're stuck on.

I used a thin block or wood on the back side of the bearings and knocked it with a hammer (lightly) and they popped out.

If you're referring to the black collar around the lower dec end, then you need vice grips and a towel. Wrap the towel around the collar, clamp it and twist. You WILL mark up the collar, but the marks are hidden when you put everything back together.

#3 gillmj24

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Posted 11 July 2009 - 02:15 PM

Step 3.

Gentle wiggling, and THEN some is not helping it "just fall out". The bearing moves about a half inch then gets stuck.

I thought I was going to do RA only so I got that tapered bearing out no problem, however I figured once I started might as well do both axes. It seems like its caught on the Dec shaft itself, not the outer housing but I could be wrong.



#4 gillmj24

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Posted 12 July 2009 - 08:30 PM

Got the bearing out, throught the "top". Maybe sitting in a warm garage all day helped, but at least I cleaned up the Synta glue from my hands and will be able to continue the tuneup this week, hopefully. Too bad since tonight has near perfect skies of course, but a idnight-2am storm last night kept us up so I am going to bed early anyway

#5 gillmj24

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Posted 14 July 2009 - 09:10 PM

declination housing removed

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#6 gillmj24

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Posted 14 July 2009 - 09:11 PM

RA housing

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#7 gillmj24

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Posted 14 July 2009 - 09:12 PM

Polar axis still attached.

Now how do I get the brass ring gears out of the respective housings? There's a bearing kind of locking it down in place, probably due to the black Synta road tar. Whoops I mean grease.

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#8 Trebor777

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Posted 14 July 2009 - 10:45 PM

Try taking off the locking knob there. It presses against the brass ring gear. Take the screw off, pry off the knob thing with a flat head, then unscrew the bolt. there's a tiny brass circle inbetween the bolt/ring gear that should come out with the bolt. That needs to be removed to get the ring gear out.

I sent you a PM by the way...

#9 gillmj24

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Posted 15 July 2009 - 09:35 AM

Thanks. Looking back at picture #1 the Declination lock clamp is out, however I think that the little brass button is still stuck inside there! That might be my problem.

#10 gillmj24

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Posted 15 July 2009 - 09:38 AM

Oh and my goodness.... I thought the Synta "glue" people were describing in various online tutorials was the yellowish gunk in the conical roller bearings.

Uh-uh.

That black residue is like tar all right, I was warned but I only was using one glove :(






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