10 Oct
2011
10 Oct
'11
3:40 p.m.
The structure of the units I am referring to is that there was a bearing
structure on the bottom carrier plate of aluminum. maybe two bearings.
The top was a clear-ish plastic cover. The ones we had in the 1980 time
frame were like this anyway. They were not metal cover on metal carrier
plate, with the substance to have a bearing on the top and the bottom of
the axis. Such probably could be repaired like a differential w/o
popping the seal if it were designed right, though I'm no expert on that.
Jim
On 10/10/2011 3:10 PM, Shoppa, Tim wrote:
Has anyone
attempted to do so or has disassembled the disk enclosure?
I would like to know if the heads are parked on or off the disks.
I've taken
apart HDA's from crashed Eagles, with no hope of ever putting back together.
The heads are parked in the landing zones on the disk.
An Eagle is a little more complicated than a "typlcal" drive in that each
surface has two heads - one covers the inner half, the other covers the outer half. I
don't think this head arrangement is unique to the Eagle but it's not all that
common.
At least one of the bearings (the bottom one) is in fact out of the HDA isn't it? On
the top center of the HDA there's some sort of cover plate and I bet the top bearing
is underneath it. Some might count that as "inside the HDA" but I count it as
"on the outside and secured by a cover plate".
Not that I've ever done a bearing replacement on an HDA quite like this. On removable
pack drives, sure (RL01/02, RK05, etc) but obviously the pack was out :-).
I would think you could locate a working HDA without a lot of difficulty.