Mark wrote:
Message: 2
Date: Thu, 3 Aug 2000 17:36:59 -0500 (CDT)
From: markdambrosio@...
Subject: RE: HGM-200 Stiction
Hi Gil, To get at the dual Roller Bearings inside the Dec. Assembly,
you must first remove the Saddle Plate, which is held on by 4 Allen Cap
Screws.
(You may have to tap the allen wrench with a hammer to break the bolts
loose, Mine were tight.)
Then you will need a large set of Snap Ring Pliers to remove the Snap
ring that is present under the Saddle Plate (I found a pair at Sears,
Small snap ring pliers will not do the job adequately, it is a large
ring)
There are a couple of washers then I believe to come out. (Don't lose
thier orientation0,
Then the Large Dec.Clutch Wheel will unscrew from the shaft.
You will then be able to lift the Sub-Saddle Assembly (What the Top
Saddle Plate bolts to) completely off the Dec Shaft.
Clean the two Rollers Bearings very well with a solvent like
Turpentine/Naptha/Gasoline (Don't smoke!), and then repack the bearings
with your finger with a high quality grease.
Reverse this order for reassembly.
The difference will be dramatic! (Two finger movement at the scope once
it's balanced) If you have any questions feel free to e-mail me, Mark
Thanks for replying. Glad to see there's at least one other
HGM owner out there. I had not considered performing the operation
so soon since the mount is new, but I guess it wouldn't hurt.
I suppose the Permatex grease suggested earlier would be appropriate?
The stiction problem is a real bear, since I end up pushing the
scope back and forth over the same DSS reading, then have a tough
time composing in the eyepiece. In particular, once I've gotten
set up, and have PEC going, I don't like to give up that 8 minutes
to PEC training in order to have the slew speeds available for
finding and composing objects prior to photographing.
D'ya suppose that Scott might ever make a change in the
electronics so that PEC is permanent, or at least allows you to
use slew speeds without disabling it and having to start again?
This is a frustrating part of the operation of the mount.
Thanks again,
-- Gil
