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Good evening,
Had some worm/ring interface chatter that was growing worse over time (with worsening guiding) and I had a couple of spare hours today so I decided to clean and regrease my RA axis (DEC to follow this weekend). I followed the videos for the the cleaning/grease kit from Losmandy but it really only covered the needle bearings and didn't go into the removal/cleaning of the ring gear.

I managed to get those three small cap screws off the backside of the RA axis that hold the ring gear cover to the front of the mount but that bottom one sure was annoying, especially getting it tightened back in... Is there a trick to that one? Are people removing the RA Axis from the altitude adjustment block?

Thanks
Ryan Noonan

On Fri, May 31, 2024 at 12:11 AM, Ryan Noonan wrote:

Is there a trick to that one?

Yes, Ryan. You can take a 2mm(?) Allen wrench and chop off about half of the short side of the "L". Then file and sand it until it is square and smooth again. I have this special wrench in my Losmandy parts and tools box for whenever it is needed. The other choice is to disassemble the base part of the mount and remove all four bolts that pivot and lock in the altitude adjustment so you can reach that screw. The wrench is simpler - use a hacksaw or a Dremel cutting disc if you have one.

Good luck,

John
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Losmandy G11G2 on pier; refurbed Losmandy G11 with OnStep controller; SkyShed design roll-off observatory; ZWO ASI2600MM-P; ZWO ASI071MC; Sky-Watcher Esprit 100 ED with field flattener; Celestron C925 Edge HD with 0.7XFR, William Optics Zenithstar 61 APO; PHD2, Sequence Generator Pro and PixInsight user

Genius!

Thank you John.?
Clear skies

On Sun, Jun 2, 2024 at 10:17 AM, George Cushing wrote:

Pretty sure the set screws are still imperial 1/16th" (1.5875mm). 2mm is 0.0787". Although my cheap 2mms?mic out to 0.0753". 1.5mm may work, if that 0.0035 thirty-five ten-thousandths of an inch isn't needed.

My special wrench measures 1.95mm or 0.076" via micrometer. The replacement screw is a #6x32 stainless button head which needs a 5/64" Allen key or 2mm. I bought a #6x32 screw multi-pack on Amazon a while ago in case I need to replace any of the cover screws on my G11. They all have the same threads, but have different lengths for worm cover, spur gear cover, etc.

Good luck,

John
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Losmandy G11G2 on pier; refurbed Losmandy G11 with OnStep controller; SkyShed design roll-off observatory; ZWO ASI2600MM-P; ZWO ASI071MC; Sky-Watcher Esprit 100 ED with field flattener; Celestron C925 Edge HD with 0.7XFR, William Optics Zenithstar 61 APO; PHD2, Sequence Generator Pro and PixInsight user