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Damaged HP 9810A
05-02-2014, 11:56 AM
Post: #9
RE: Damaged HP 9810A
For the fan, looking at Tony's schematic it looks like this is and AC fan, and this kind of behaviour was common, on an old system I used to service almost every time you turned one off you ended up replacing fans because they would not start again.

The best solution would be to find a suitable replacement fan, but on some older equipment that is not always possible.

The starting part can probably be fixed, a lot of these old fans used a sintered bronze sleeve bearing and what happens is the bearing goes dry plus there is a build up of debris on the surface of the bearing that impairs movement. The fix involves taking apart the fan. On one side of the fan there will be a cap over the end of the shaft under this cap you will usually find there is a clip on the end of the shaft holding it in, remove this clip and you should be able to pull off the rotor from the other side, there will also likely be assorted plastic spacers on the shaft as well so be careful when pulling it out. once you have it out clean off the shaft and also clean the black debris from the bearing. Oil the bearing with a light machine oil, a sintered bronze bearing is designed to absorb some oil as well, reassemble and test. This should fix the starting problem but may not help with the noise.

For the case the first thing I would try would likely be Methyl Ethel Ketone (MEK) often called plastic weld, it is a solvent glue so be careful about getting it on the surface as it will mar the finish.
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Messages In This Thread
Damaged HP 9810A - douze-bis - 04-26-2014, 10:23 AM
RE: Damaged HP 9810A - Tony Duell - 04-27-2014, 06:26 AM
RE: Damaged HP 9810A - douze-bis - 04-27-2014, 01:56 PM
RE: Damaged HP 9810A - Tony Duell - 04-28-2014, 06:39 AM
RE: Damaged HP 9810A - douze-bis - 04-27-2014, 03:08 PM
RE: Damaged HP 9810A - douze-bis - 05-02-2014, 11:09 AM
RE: Damaged HP 9810A - douze-bis - 05-02-2014, 11:17 AM
RE: Damaged HP 9810A - Katie Wasserman - 05-02-2014, 03:42 PM
RE: Damaged HP 9810A - douze-bis - 05-03-2014, 12:02 AM
RE: Damaged HP 9810A - Katie Wasserman - 05-03-2014, 03:35 AM
RE: Damaged HP 9810A - Tony Duell - 05-03-2014, 06:56 AM
RE: Damaged HP 9810A - Paul Berger (Canada) - 05-02-2014 11:56 AM



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