Joseph Gillman
Carpal Tunnel
Reged: 12/06/05
Posts: 2784
Loc: Aston, PA
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After months of not getting time to work on my mount, I finally madesome progress tonight. My ra shaft assembly didn't quite come apart as easily as on the hypertune videos.
Now that I have gotten my cylindrical brass gears out of their housings my question is is it safe to leave them in a bath of water with a bit of dove dish soap to soak overnight since I don't have a parts washer or anythig fancy. Brass and anodized aluminum won't rust overnight will they?
That synta black grease was like a mix of tar and glue I had the toughest time gettin the ra gears out to start cleaning them. Now to dothe same for the dec gears while I await your responses 
thanks.
Thanks.
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Edited by lineman_16735 (10/23/09 11:22 PM)
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Deven Matlick
Vendor - Criterion Machine Co. LLC
Reged: 12/31/05
Posts: 84
Loc: Moatsville, WV
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The best way to remove that grease is to use brake cleaner (available at any auto store). I would get a few cans of it and a good stiff brush.
Ps, Its powerful stuff, use it outside!! 
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Sincerely,
Deven Matlick
Criterion Machine Co. LLC
"We Meet Your Criterion"
Rt 1 Box 253A
Moatsville, WV 26405
304-457-5368
dmatlick@westvirginia.com
www.criterionmachine.com
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Joseph Gillman
Carpal Tunnel
Reged: 12/06/05
Posts: 2784
Loc: Aston, PA
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I am going with the safer route of orange pumice cleaner, isopropyl alcohol and lots of paper towels.
Still would like to know if water and soap overnight is okay.
Would makethe scrubbing job easier tomorrow.
Thanks!
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Deven Matlick
Vendor - Criterion Machine Co. LLC
Reged: 12/31/05
Posts: 84
Loc: Moatsville, WV
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Quote:
I am going with the safer route of orange pumice cleaner, isopropyl alcohol and lots of paper towels.
Still would like to know if water and soap overnight is okay.
Would makethe scrubbing job easier tomorrow.
Thanks!
Stay away from pumice (grit bad). You could actually soak the metal parts in the alcohol as long as there is no paint or plastic involved.
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Sincerely,
Deven Matlick
Criterion Machine Co. LLC
"We Meet Your Criterion"
Rt 1 Box 253A
Moatsville, WV 26405
304-457-5368
dmatlick@westvirginia.com
www.criterionmachine.com
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David Pavlich
Postmaster
Reged: 05/18/05
Posts: 8668
Loc: Mandeville, LA USA 30.22 X 90....
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Completely off topic...HAPPY BIRTHDAY, JOSEPH!
David
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Proud Member; PAS NOLA,
"If we knew what we were doing, it wouldn't be called research..."
A. Einstein
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Joseph Gillman
Carpal Tunnel
Reged: 12/06/05
Posts: 2784
Loc: Aston, PA
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Thanks I will save the pumice for cleaning my hands and tools afterwards.
Thanks for the birthday wishes too.
I drilled and tapped the holes for the latitude adjustment mod, no issues there… but to get the two 6008 bearings off the declination gear I will need some wood blocks as shown in the hypertune DVD. So I think I will call it a night. I broke the nylon(?) spacers so I will order some Teflon ones like the hypertune people sell.
All you need is one or two spacers for each RA and Dec assembly, right? Has anyone found a good source to just buy the ones you need rather than paying $40 for two spacers you need and many more that you don't??
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Jeffrey Sugden
sage
Reged: 05/04/05
Posts: 383
Loc: Akron, OH
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Figure out which thicknesses you need. I have leftovers spacers from my rebuild set and maybe I have what you need.
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Jeff
WO ZS 80FD
Celestron FS80
Celestron FS80WA
Meade SN6
Cave Newt 6" F8 (project)
SAC 8-II
Meade LPI
Philips SPC-890
Orion SSAG
Nikon D40
EQ-6 (SynScan upgrade)
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Joseph Gillman
Carpal Tunnel
Reged: 12/06/05
Posts: 2784
Loc: Aston, PA
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THanks Jeff I really appreciate it!! I am not quite up to that point yet, I spent about 90 minutes tonight cleaning (or trying to rather) the old black tar out of the big brass gear teeth.
Of course I don't know which one is RA and which one is Dec now, watching a hypertune dvd to try to figure that out.
I also took 3 of my 6 6008 48mm bearings and degreased them, and replaced the stock grease (better than the black tar used elsewhere) with superlube. Now they spin much LESS freely than the stock 6008 bearings that I didn't disassemble yet. Did I make a mistake? Should I order the set of 6 new 6008 bearings from one of the hypertune vendors now?
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Joseph Gillman
Carpal Tunnel
Reged: 12/06/05
Posts: 2784
Loc: Aston, PA
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Ok my (now definct??) Telescope Stability Systems hypertune dvd tutorial says to regrease the 6008 bearings with lithium grease ( I am using SuperLube) so I should be okay there.
Still not happy with how clean I got the worm wheel gears with just paper towel fingernail toothbrush and isopropyl alcohol. So I might try terpentine next. Trying to avoid brake cleaner and gasoline!
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Nightknight
member
Reged: 10/12/07
Posts: 95
Loc: The great pacific northwet of ...
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Quote:
....took 3 of my 6 6008 48mm bearings and degreased them, and replaced the stock grease (better than the black tar used elsewhere) with superlube. Now they spin much LESS freely than the stock 6008 bearings that I didn't disassemble yet. Did I make a mistake? Should I order the set of 6 new 6008 bearings from one of the hypertune vendors now?
Are they gritty feeling? If that's the case I would guess you loosened something up but didn't get it out of the bearing completely. If they just don't run-on after giving them an initial spin, that may be that your old lube was all pushed out of the way (essentially dry bearing) and now you have a coat of viscous stuff on the actual bearing surfaces. Just some thoughts without really knowing what condition you're describing, fwiw.
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Chemisttree
member
Reged: 02/05/08
Posts: 29
Loc: San Antonio, TX
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So, how did you degrease the 6008's? I replaced mine and used the grease that they came with. You probably didn't need to do anything anyway since they 'spin' at something like 1 revolution per day! Superlube is definitely overkill in that application. I wouldn't worry about the increased drag with the new grease unless you damaged the plastic dust cover for the bearings (it might be dragging against the end of the bearings). Even then, you probably won't notice it in use.
Try soaking your ring gears in paint thinner (Wal Mart). It does a number on that grease and isn't as nasty-smelling as turpentine.
I don't know what parts you refer to as anodized aluminum but I wouldn't soak any aluminum parts in water since it can corrode aluminum if the pH of your soap is too high (anodized coatings can have chips and defects in them). I don't think water will help anything at all and would avoid it.
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BCB
Undercover Saboteur
Reged: 11/24/03
Posts: 5197
Loc: Look over your shoulder
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Brake cleaner on the worm gears is fine.. As far as the "stiffness" after repacking with superlube.. Not to worry at all.. That's normal. They'll be fine.
The only concern I have on the chinese bearings, is what tolerance rating they are, and how well did they actually hold to the rated tolerance.
If you do decide to just change them out, SKF brand is a good choice. Never used the ceramic ones, but from what I've read on them, they are an EXCELLENT replacement.
The most critical part of the whole thing, is getting the worm centerline, and the gear centerline as close to parralel as possible, and then getting the mesh just right.
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Mark
Lost in thought. Please send search party!!!
Astro-Tech 111EDT
Orion 8" F5 Newt w/Moonlight CR-2 focuser
SVP mount w/Meade 497 Autostar GOTO mod
Treeline Observatory
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Charlie Hein
Postmaster
Reged: 11/02/03
Posts: 7965
Loc: 26.06.08N, +80.23.08W
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Quote:
Completely off topic...HAPPY BIRTHDAY, JOSEPH!
David
Right back at 'cha, David!
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"He's dead, Jim - I'll get his wallet, you get his tricorder." - Leonard "Bones" McCoy
Weston CSC:
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Joseph Gillman
Carpal Tunnel
Reged: 12/06/05
Posts: 2784
Loc: Aston, PA
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Ok mineral spirits did the trick for me I finally got all my parts very clean last night. I got the "odorless" kind yet the smell was terribly strong even through my 3M mask. Next is the dry assembly to see what spacers I need.
Of course I didn't do one axis at a time. I found a website that custom makes Teflon washers so hopefully I can save buy just buying 2 instead of a whole set for $40.
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Joseph Gillman
Carpal Tunnel
Reged: 12/06/05
Posts: 2784
Loc: Aston, PA
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Another question. I got ABEC 5 bearings from a skateboard shop and they are REALLY smooth. They are metal sealed on one side rubber gasket on the other.
Should I open those up and lube with lithium grease? Superlube is the only lithium grease I have, I bought a big tube the first time I worked on my Meade lx200 scope an have plenty left, overkill perhaps.
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Joseph Gillman
Carpal Tunnel
Reged: 12/06/05
Posts: 2784
Loc: Aston, PA
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Bump. Would really like to finish this project this weekend.
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BCB
Undercover Saboteur
Reged: 11/24/03
Posts: 5197
Loc: Look over your shoulder
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I'd leave the race shields alone. It's damn near impossible to remove and replace the steel side, and the rubber sides race seal can get damaged when removing them. Replacing them is a snap. The trick is removing them without damaging them.
The bearings are be pre lubed. For the speeds their running at, I wouldn't mess with it..
When you install those bearings, place the steel shield facing into the mount, with the rubber side facing out of the mount
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Mark
Lost in thought. Please send search party!!!
Astro-Tech 111EDT
Orion 8" F5 Newt w/Moonlight CR-2 focuser
SVP mount w/Meade 497 Autostar GOTO mod
Treeline Observatory
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Joseph Gillman
Carpal Tunnel
Reged: 12/06/05
Posts: 2784
Loc: Aston, PA
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I am not a happy camper.
After months of down time, which itself was not the seller's fault, but I finally realize what was causing the play (a few degrees!) in one of the axes, making it unsuitable for serious photography which I had hoped to undertake.
I thought by borrowing a hypertune dvd, which I have had for months now (thanks Randy....) tearing down and regreasing I would fix the problem, but I see that the holes for the two little bearings (the ABEC 5's I got as replacements) are too big for the bearings to be press fit!!!!!!! I think it might be only the hole nearest the spur gear, it is on the left if the flat side of the housing is facing you.
After watching the video and tearing down, I figured that little "nut" with the two flathead screwdriver slots in it was simply not tightened down enough allowing mucho play side to side, or that the mesh just wasn't right.
Is it salvalgeable? The video clearly shows that the worm by itself should NOT have any side to side play at all before reinstalling. If I wiggle it enough, the bearings can actually fall out.
Bought this on shop and swap, I am going to have a little chat unless a workaround can be found. I bought it in February and thought it was a good deal, but since the seller put in the goto upgrade, I think he knew there was this issue but did not disclose it. I guess statute of limitations of gentlemanly dealing has passed (8 months ago now...) so does anyone know if Orion sells spare parts so that I can get a new worm housing?
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Edited by Joseph Gillman (10/23/09 10:04 PM)
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Joseph Gillman
Carpal Tunnel
Reged: 12/06/05
Posts: 2784
Loc: Aston, PA
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Also I realize my first post had something inappropriate for children. My iPhone autocorrecting function thought "now to do the **DEC** gears" meant something totally different.
Just caught it now, mods please edit because it is too old a post for me to do so myself
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Edited by Joseph Gillman (10/23/09 09:58 PM)
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Joseph Gillman
Carpal Tunnel
Reged: 12/06/05
Posts: 2784
Loc: Aston, PA
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Ok a little calmer now.....
I put the cover that holds the bearing in place, and that eliminates the play so I guess it is usable after all.
Still though the other housing does not do that and on the video I have from telescope stability systems they say there should be no play side to side, you shouldn't need to put the cover in. to prevent it. But I hope to the heavens this will work, I have put way too much time into a mount that hasn't been used in months here...
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