18 Dec
2002
18 Dec
'02
3:17 p.m.
Well I managed to get a M7095 module ($25 plus shipping) for the PDP11/44 I
recently acquired and now I can connect to the console >>> prompt after
powering it on. Plus I figured out how to execute the firmware utility on
the CMD CDU-720 (anyone have docs for this board?) so it appears that the
system is fairly functional.
However, after a while I noticed that some of the modules seemed to be
running rather hot and then I noticed that one of the three fans is not
working. I pulled out the fan tray and found that I can manually spin up
the two good fans with little effort but the bad fan sticks and won't spin.
These fans are labeled Torin TA450 Model A3102-10 35VAC 75Hz. Anyone know
where a replacement fan could be obtained?
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18 Dec
18 Dec
3:39 p.m.
Quothe Glen S, from writings of Wed, Dec 18, 2002 at 06:19:20PM -0800:
These fans are labeled Torin TA450 Model A3102-10
35VAC 75Hz. Anyone
know where a replacement fan could be obtained?
What you don't need is a replacement fan. :-) I had a similar problem
when I got my 11/44 several years ago; Tony Duell kindly instructed me
on the _proper_ way to solve this problem. From memory: all that you
need to do is disassemble this fan, and the other fans, soak the
bearings in mineral spirits to clean them, relubricate the
bearings/bearing race with white lithium grease and reassemble the
fans. Do this with all of the fans, working or not.
Tony, if you're reading this, is my memory about what to use for that
procedure correct? ...somewhere I've still got my notes/e-mail from
several years ago, but would have to do some digging to find it.
--
Copyright (C) 2002 R. D. Davis The difference between humans & other animals:
All Rights Reserved an unnatural belief that we're above Nature &
rdd(a)rddavis.org 410-744-4900 her other creatures, using dogma to justify such
http://www.rddavis.org beliefs and to justify much human cruelty.
19 Dec
19 Dec
11:53 a.m.
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12:15 p.m.
On Thu, 19 Dec 2002, Tony Duell wrote:
It's often called mineral spirits here in the states. It can be purchased
cheaply in large cans at any hardware/home center type store.
One nice property when using it as a solvent cleaner, is that the "dirty"
thinner can be put in a glass or metal container, and the grease/dirt, etc
will settle to the bottom.
-Toth
on the
_proper_ way to solve this problem. From memory: all that you
need to do is disassemble this fan, and the other fans, soak the
bearings in mineral spirits to clean them, relubricate the
bearings/bearing race with white lithium grease and reassemble the
fans. Do this with all of the fans, working or not.
Tony, if you're reading this, is my memory about what to use for that
procedure correct? ...somewhere I've still got my notes/e-mail from
Yes, it should be fine. I used what's called 'white spirit' in the UK to
clean the bearings (this is a paint thinner/brush cleaner type stuff, I
have no idea what it's called elsewhere). I lubricated them with high
melting point grease (Castrol LM), but any bearing grease would be fine. 
20 Dec
20 Dec
6:41 a.m.
Rather like servicing wheel bearings, isn't it?
On Thu, 19 Dec 2002, Tothwolf wrote:
On Thu, 19 Dec 2002, Tony Duell wrote:
It's often called mineral spirits here in the states. It can be purchased
cheaply in large cans at any hardware/home center type store.
One nice property when using it as a solvent cleaner, is that the "dirty"
thinner can be put in a glass or metal container, and the grease/dirt, etc
will settle to the bottom.
-Toth
M. K. Peirce
Rhode Island Computer Museum, Inc.
Shady Lea, Rhode Island
"Casta est quam nemo rogavit."
- Ovid
on the
_proper_ way to solve this problem. From memory: all that you
need to do is disassemble this fan, and the other fans, soak the
bearings in mineral spirits to clean them, relubricate the
bearings/bearing race with white lithium grease and reassemble the
fans. Do this with all of the fans, working or not.
Tony, if you're reading this, is my memory about what to use for that
procedure correct? ...somewhere I've still got my notes/e-mail from
Yes, it should be fine. I used what's called 'white spirit' in the UK to
clean the bearings (this is a paint thinner/brush cleaner type stuff, I
have no idea what it's called elsewhere). I lubricated them with high
melting point grease (Castrol LM), but any bearing grease would be fine.
19 Dec
19 Dec
11:53 a.m.
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5 comments
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ard＠p850ug1.demon.co.uk -
at258＠osfn.org -
glenslick＠hotmail.com -
rdd＠rddavis.org -
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