gmv@cbuxc.UUCP (Mike Vrbanac) (08/07/85)
PC6300 users:
What follows is an article I wrote for the Computer Club. If you have a
hard disk it may be something you will need to know.
mike vrbanac
--------------------------------------------------------------------------
TO: CRES Computer Club
FROM: G. Michael Vrbanac
RE: SHUGART Hard disk whine
DATE: July 8, 1985
Some AT&T PC6300s with a SHUGART model 706 or model 712 hard disk may
start to whine. This whine results from a lack of lubrication of the
spindle ground button. A lubrication kit is available from:
Hamilton-Avnet Electronics
19515 South Vermont
Torrence, Calif. 90502
1-800-521-3387
A lube kit consisting of a syringe of lubricant and a rubber wedge
retails for about a buck and a half. The instructions say it takes 20
minutes, but 45 minutes is more in line. Here's the crux of the
instructions:
A. Remove drive from box and unpack.
B. Place drive on bench with PCB facing upward
C. Take wedging tool and carefully insert the thin end just
under the narrow end of the ground flexure. Once the wedging
tool is in place, gently roll it downward until the thick
end is flat against the PCB and the ground button is raised
up off the button bearing.
D. Observe at a close distance the area under th flexure. The
ground button bearing (round ball on motor)should be visible
E. Using the syringe filled with lubricant, insert the tip of
the needle directly over the ground button bearing and
release a small bead of lubricant approximately the size
of a pinhead on to the top of the button bearing.
F. Lower the ground button onto the bearing and carefully
remove the wedging tool.
One potential source of confusion is the syringe of lubricant itself.
It only contains about two drops of lubricant, so when you unpack the
kit and the syringe appears to be empty, it isn't!
--
+--------------+------------------------+-----------------+
| Mike Vrbanac | AT&T Bell Laboratories | Columbus, Ahiya |
+--------------+------------------+-----------------------+
| Unix: {cbosgd|ihnp4}!cbuxc!gmv | CompuServ: 76054,113 |
+---------------------------------+-----------------------+bbb@ariel.UUCP (BRUCE B. BIRT) (08/08/85)
> > PC6300 users: > > What follows is an article I wrote for the Computer Club. If you have a > hard disk it may be something you will need to know. > > mike vrbanac > > -------------------------------------------------------------------------- > > > TO: CRES Computer Club > > FROM: G. Michael Vrbanac > > RE: SHUGART Hard disk whine > > DATE: July 8, 1985 > > Some AT&T PC6300s with a SHUGART model 706 or model 712 hard disk may > start to whine. This whine results from a lack of lubrication of the > spindle ground button. A lubrication kit is available from: > > Hamilton-Avnet Electronics > 19515 South Vermont > Torrence, Calif. 90502 > 1-800-521-3387 > > A lube kit consisting of a syringe of lubricant and a rubber wedge > retails for about a buck and a half. The instructions say it takes 20 > minutes, but 45 minutes is more in line. Here's the crux of the > instructions: > > A. Remove drive from box and unpack. > > B. Place drive on bench with PCB facing upward > > C. Take wedging tool and carefully insert the thin end just > under the narrow end of the ground flexure. Once the wedging > tool is in place, gently roll it downward until the thick > end is flat against the PCB and the ground button is raised > up off the button bearing. > > D. Observe at a close distance the area under th flexure. The > ground button bearing (round ball on motor)should be visible > > E. Using the syringe filled with lubricant, insert the tip of > the needle directly over the ground button bearing and > release a small bead of lubricant approximately the size > of a pinhead on to the top of the button bearing. > > F. Lower the ground button onto the bearing and carefully > remove the wedging tool. > > One potential source of confusion is the syringe of lubricant itself. > It only contains about two drops of lubricant, so when you unpack the > kit and the syringe appears to be empty, it isn't! > > > -- > > +--------------+------------------------+-----------------+ > | Mike Vrbanac | AT&T Bell Laboratories | Columbus, Ahiya | > +--------------+------------------+-----------------------+ > | Unix: {cbosgd|ihnp4}!cbuxc!gmv | CompuServ: 76054,113 | > +---------------------------------+-----------------------+ *** REPLACE THIS LINE WITH YOUR MESSAGE ***