Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/3/84; site ariel.UUCP Path: utzoo!linus!philabs!prls!amdimage!amdcad!decwrl!decvax!harpo!whuxlm!whuxl!houxm!mtuxo!mtunh!mtung!mtunf!ariel!bbb From: bbb@ariel.UUCP (BRUCE B. BIRT) Newsgroups: net.micro.pc Subject: Re: AT&T PC6300 hard disk whine Message-ID: <1002@ariel.UUCP> Date: Thu, 8-Aug-85 10:14:54 EDT Article-I.D.: ariel.1002 Posted: Thu Aug 8 10:14:54 1985 Date-Received: Mon, 12-Aug-85 21:36:35 EDT References: <304@cbuxc.UUCP> Organization: AT&T-ISL, Holmdel, NJ Lines: 68 > > 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 ***