Re: [ap-gto] 900 hole


Apr 17, 2004

 


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#9919 Apr 17, 2004

Hello

My 900gto has a 1/4", 1/2" deep hole drilled in the side of the removable

black ring at the weight end of the declination axis. Is there a purpose for

this hole. Just wondering if something important has fallen off. :)

Dale



----------------------------

#9920 Apr 17, 2004

--- In ap-gto@yahoogroups.com, "Dale Ireland" direland@d...> wrote: > Hello

> My 900gto has a 1/4", 1/2" deep hole drilled in the side of the

removable > black ring at the weight end of the declination axis. Is there a

purpose for > this hole. Just wondering if something important has fallen off. :)

> Dale



If anything like my 800 mount, this is a 1/4-20 threaded

bolt hole.



Use it to fasten a large washer with od > shaft dia.



This to prevent a loose counterwieght from falling off.



Some day it will save your foot....

Bill



----------------------------

#9923 Apr 18, 2004

No, it is on the black anodized cap where the counterweight shaft

screws in. I just looked at a 1200 and it has it also. Is it to aid

tightening the cap or a machining artifact?

Dale >

> If anything like my 800 mount, this is a 1/4-20 threaded

> bolt hole.

>

> Use it to fasten a large washer with od > shaft dia.

>

> This to prevent a loose counterwieght from falling off.

>

> Some day it will save your foot....

> Bill



----------------------------

#9924 Apr 18, 2004

--- In ap-gto@yahoogroups.com, "Dale Ireland" direland@d...> wrote: > No, it is on the black anodized cap where the counterweight shaft

> screws in. I just looked at a 1200 and it has it also. Is it to aid

> tightening the cap or a machining artifact?

> Dale

> >

> > If anything like my 800 mount, this is a 1/4-20 threaded

> > bolt hole.

> >

> > Use it to fasten a large washer with od > shaft dia.

> >

> > This to prevent a loose counterwieght from falling off.

> >

> > Some day it will save your foot....



You're right. I'm thinking of the one on outboard end

of cw shaft.



----------------------------

#9927 Apr 18, 2004

No, it's there to help you remove it, by putting a lever in to turn

it, should you ever need to.



Gerald

--- In ap-gto@yahoogroups.com, "Dale Ireland" direland@d...> wrote:

> Hello

> My 900gto has a 1/4", 1/2" deep hole drilled in the side of the

removable

> black ring at the weight end of the declination axis. Is there a

purpose for

> this hole. Just wondering if something important has fallen off. :)

> Dale



----------------------------

#9928 Apr 19, 2004

In a message dated 4/17/2004 7:41:12 PM Central Daylight Time,

direland@... writes:



> My 900gto has a 1/4", 1/2" deep hole drilled in the side of the removable

> black ring at the weight end of the declination axis. Is there a purpose for

> this hole. Just wondering if something important has fallen off. :)

> Dale

>



This is used during assembly to tighten the ring on and can be used to remove

this ring (it threads on like a large nut). You can use, for instance, a

Phillips head screw driver as a Tommy bar to turn this nut to remove it.



Roland Christen





[Non-text portions of this message have been removed]



----------------------------

#9932 Apr 19, 2004

Thanks, that is what I figured. At first I thought I was missing a set screw

because when I screw in the weight shaft it binds to the that ring and when

I unscrew the weight shaft it unscrews the whole collar with it. I have to

beak them apart with one hand on each. I can't seem to get the collar tight

enough on the mount to stop it from doing that. I try not to over tighten

the weight shaft.

Dale

On 4/19/2004 7:16:53 AM, ap-gto@yahoogroups.com wrote:

> In a message dated 4/17/2004 7:41:12 PM Central Daylight Time,

> direland@... writes:

>

>

> > My 900gto has a 1/4", 1/2" deep hole drilled in the side of the

> removable

> > black ring at the weight end of the declination axis. Is there

> a purpose for

> > this hole. Just wondering if something important has fallen off. :)

> > Dale

> >

>

> This is used during assembly to tighten the ring on and can be used to

> remove

> this ring (it threads on like a large nut). You can use, for instance, a

> Phillips head screw driver as a Tommy bar to turn this nut to remove it.

>

> Roland Christen

>

>

> [Non-text portions of this message have been removed]

>

>

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

> Yahoo! Groups Links

>

>

>



----------------------------

#9934 Apr 19, 2004

In a message dated 4/19/2004 9:50:36 AM Central Daylight Time,

direland@... writes:



> I have to

> beak them apart with one hand on each. I can't seem to get the collar tight

> enough on the mount to stop it from doing that. I try not to over tighten

> the weight shaft.

>



Put just a tiny bit of lubricant on the aluminum threads so that the

counterweignt shaft un-threads more easily. Dry lubricant or even car wax works very

well.



Roland Christen





[Non-text portions of this message have been removed]







----------------------------

#9936 Apr 19, 2004

I've had a similar experience with the 1200; particularly on cold nights.

It occurred to me that as the temperature drops the collar would naturally

tend to tighten on the steel due to it's higher coefficient of expansion.

I've been considering loctite (a non-permanent grade) for the mating thread

between the collar and the dec housing. That's a large threaded surface

though, and I might too easily find myself with an unremoveable collar!

Thoughts?



-----Original Message-----

From: chris1011@... [mailto:chris1011@...]

Sent: Monday, April 19, 2004 10:53 AM

To: ap-gto@yahoogroups.com

Subject: Re: [ap-gto] 900 hole





In a message dated 4/19/2004 9:50:36 AM Central Daylight Time,

direland@... writes:



> I have to

> beak them apart with one hand on each. I can't seem to get the collar

tight > enough on the mount to stop it from doing that. I try not to over tighten

> the weight shaft.

>



Put just a tiny bit of lubricant on the aluminum threads so that the

counterweignt shaft un-threads more easily. Dry lubricant or even car wax

works very

well.



Roland Christen





[Non-text portions of this message have been removed]







To UNSUBSCRIBE, or for general information on the ap-gto list

see groups.yahoo.com/group/ap-gto

Yahoo! Groups Links



----------------------------

#9942 Apr 19, 2004

Thanks, that is what I figured. At first I thought I was missing a set screw

> because when I screw in the weight shaft it binds to the that ring and when

> I unscrew the weight shaft it unscrews the whole collar with it. I have to

> beak them apart with one hand on each. I can't seem to get the collar tight

> enough on the mount to stop it from doing that. I try not to over tighten

> the weight shaft.

> Dale



I've had this happen to me with my 900GTO mount a couple of time. Beware!

The threads on the black collar are Really Sharp and can slice open

your skin pretty easily as you grab a hold of it firmly :-)



I now carry around a pair of strap wrenches for this purpose. Either

loosening the counterweight shaft from the collar, or to tighten up

the collar as it screws into the DEC axis of the mount.



louie



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