My club has recently obtained a maybe 2010 era? G11 with Gemini-1 controller, untucked servos, OPW, and pretty gummed up bearings and axis shafts.

We debugged the Gemini a bit and got it booted, tested the servos (good), and took apart both axis, using the Losmandy lube kit to remove really old hardened grease and free the bearings. Regreased with the Losmandy supplied grease. Clutch pads are a bit worn (some grooving).?

The needle bearings were frozen, but eventually came free-ish.?

Minimally, we should replace the clutch pads, and install new bearings. Haven't even started looking at the OPW.

Any suggestions for further tweaks/upgrades/adjustments to make? SLW upgrade, bearings? Pitfalls?

Thanks in advance!

?Dale Nelson

Have you tested, actually used the mount yet?

Tracking
Goto
...etc

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Jim W
Phoenix, AZ. USA

Losmandy G11G w/ L6, NINA 3.0 / ASTAP, ASI2600MC Pro, Sky-Watcher Scopes, Canon L Lenses.

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In our initial testing, we only bench tested the mount standalone, after doing some temporary repairs on the Gemini-1. We took the RA and Dec axis apart to clean and re-grease before anything else, as they were frozen and could not be moved by hand. The servos now move both the RA and Dec axis.? There is still some un-binding/gunk-work to do.

We have no saddle nor pier/tripod yet, so real world testing is yet to come.

Dale

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Thanks Derek. I've replied separately to you.

Thanks for the GFT and MA adapter testing offer - I have a Losmandy LW tripod from my GM811G for testing currently.

Dale

Dale.. Check your Junk mail folder, as I’ve replied to you a couple times.. If you’ve answered, I may not get it for awhile as I am streaming Sharks Hockey..

Additionally, if you want to borrow my Meade GFT and MA Adapter to test your mount, that could be arranged..

Derek

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From: [email protected] [mailto:[email protected]] On Behalf Of Jim Waters
Sent: Thursday, February 15, 2024 5:46 PM
To: [email protected]
Subject: Re: [Losmandy_users_io] Mature G11 repair

?

Have you tested, actually used the mount yet?

Tracking
Goto
...etc

------------------------
Jim W
Phoenix, AZ. USA

Losmandy G11G w/ L6, NINA 3.0 / ASTAP, ASI2600MC Pro, Sky-Watcher Scopes, Canon L Lenses.

?

Virus-free.

On Thu, Feb 15, 2024 at 06:17 PM, DaleN wrote:

My club has recently obtained a maybe 2010 era? G11 with Gemini-1 controller, untucked servos, OPW, and pretty gummed up bearings and axis shafts.

We debugged the Gemini a bit and got it booted, tested the servos (good), and took apart both axis, using the Losmandy lube kit to remove really old hardened grease and free the bearings. Regreased with the Losmandy supplied grease. Clutch pads are a bit worn (some grooving).?

The needle bearings were frozen, but eventually came free-ish.?

Minimally, we should replace the clutch pads, and install new bearings. Haven't even started looking at the OPW.

Any suggestions for further tweaks/upgrades/adjustments to make? SLW upgrade, bearings? Pitfalls?

Thanks in advance!

?Dale Nelson

Dale,

Sounds like your mount needs a trip to Micheal Herman in CA. If the mount was that gummed up, the running on frozen bearings probably led to flat spots or gouged thrust bearing washers. Personally, I would replace all the bearings with new ones, including the internal needle bearings - not just do a relube. You may need new gearboxes as well as these plastic geared parts could be worn out. Michael has replacement non-slip clutch pads which you will are a resistant to slippage. I refurbed a 1996 mount myself which I now use successfully for AP purposes. Please let me know if you need further info.



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

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Many thanks to all!

Given all the potential issues, I'm in contact with Michael Herman - thanks for the suggestion, John.

Will update when we're all done - and operational!

Thanks!

Dale