Re: [APML] G11 Maintenance

["Bob Hughes" <rhughes@extremezone.com>]

Hi Dave:

No, it's rather easy. Just unscrew the clutch knobs and remove the washers
and note the order in which they come off. Be sure to hold the head assembly
or the weight of the head will allow it to swing over and hit your clock
drive motor (I had to repair mine). Pull out the entire shaft and you will
be able to then get access to the bearings. Use WD40 to loosen the bearings
if frozen. They should be loose and rotate ealsily with your fingers. Clean
with alcohol. Remove the worm gear drive cover and you will see how to
continue the disassembly. You will have to loosen the worm gear in order to
remove and reassemble the main drive gear.  There is another bearing that is
underneath the main drive gear. It has a couple of stanless steel washers
that make up the bearing. Note the order. The disassembly/assembly is
basically the same for RA and DEC. Clean all surfaces with alcohol. Grease
and reassemble. Be sure to keep lube/grease off of the nylon clutch plate.
Don't use too much grease as a small amount goes a long way.

Good luck,

Bob


----- Original Message -----
From: "David Kodama" <d_kodama@yahoo.com>
To: <astro-photo@seds.org>
Sent: Tuesday, April 18, 2000 3:51 PM
Subject: Re: [APML] G11 Maintenance


> Bob,
>
> Is there anything particularly tricky to the
> disassembly (e.g. parts popping off unexpectedly)?
> Thanks for the info.  I had been thinking it
> might be time to do this to my mount too.
>
> Dave Kodama
>
>
> --- Bob Hughes <rhughes@extremezone.com> wrote:
> > Hello to all:
> >
> > After reading Scott Kindt's description on how to
> > improve the G11, I called
> > Scott LosMandy. I told him that my G11 was about 7-8
> > yrs old and woundered
> > if he had a process to up-grade my older model to a
> > current version. He
> > really didn't think that it was necessary. However,
> > he did tell me that
> > after all this time that I should take my mount
> > apart and clean it and that
> > most likely some of the bearings were probably
> > frozen. I have always had
> > problems with not being able to get the two clutch's
> > to firmly grab the
> > mount and hold it in a firm locked position. He told
> > me that all clutch
> > surfaces should be totaly devoid of any lubricant.
> > Long story short, I
> > found that the clutch surfaces were wet with
> > lubricant and that all berings
> > were locked up tight. I used WD40 to free all the
> > berings, cleaned them with
> > alcohol and then coated them with white lithium (not
> > remomended but thats
> > all I had) grease. Scott recommends a grease called
> > "Slick 50". In any case
> > the lithium grease (not sure of spelling) should
> > last for a few seasons
> > before the mount needs service again. I used alcohol
> > to clean all surfaces.
> > I put the mount back together and now the clutch's
> > will lock tight and the
> > RA and DEC feels alot smoother.
> >
> > Thought I would pass on my experience. Total time to
> > do the job was about
> > two hours.
> >
> > Good Luck,
> >
> > Bob Hughes
> > Cave Creek, AZ
> >
> >
> >
> >
> > --  APML Archives at
> > <http://www.system.missouri.edu/apml/>  ---
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> >
>
> =====
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> Primary email: kodama@alumni.caltech.edu
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