The 8557/58/59 used the same kind of disks you could possibly find a parts mule on ebay though there is no guarantee that its not going to suffer from the same disease as this was a common problem.
Take note though that the springs are attached to the disks by means of small plastic bumps that are molted to secure them , thermoplastics become briddle over time and the bumps shear off.
The way i fixed them back at tucker was to get small self tapping screws and use a dremel tool to drill holes in the disks
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On May 28, 2022, at 11:28, kim.herron@... via groups.io <kim.herron@...> wrote:
?
You can try contacting Sphere Research in Vancouver BC, Canada.? They have a lot of HP parts.? Those wipers are part of the discs that are in the switch assy and no part number exists
for the wipers as such.? However, there may be other HP gear that uses something similar that would yield the items that you need to fix your generator.? You can also keep an eye out for an entire
switch assy from an 8640B on E-Bay.? That stuff is out there.? The reason that those wipers break off is because of the gears cracking.? Those cracked gears force the tension spring
in the rear of that switch assy? to collapse and when that happens the wipers on those discs are forced to flex beyond their design limits and that's what breaks them off the discs.? Make sure your gears are not coming apart.
On 28 May 2022 at 8:06, Donald Prins wrote:
Hi Ellud,
Can you tell me where one can obtain those wipers? I have a HP8640B that is missing 3 in total on the FM/RANGE switches. Your help will be much appreciated.
Donald?
PE1AHJ
Kim Herron? W8ZV
kim.herron@...????
1-616-677-3706
