RL drive lubrication
oldcpu at rogerwilco.org
Tue Apr 11 12:46:56 CDT 2006
In a recent acquisition of several 11/23 systems I was fortunate to
receive four RL01
drives, being two sets of Unit 0 and Unit 1.
One set of these drives were very dirty/dusty, and by the looks of the
(which were deteriorating badly in all drives) and the accumulations in
supply and plenum areas, I have to say this set was used in at least an
ISO Class 10
Million level (not so) clean room environment! The other drive set
pretty good condition, cleanliness wise. I replaced all four course
checked the absolute filters, which were actually okay even in the dirty
Because all of these have been powered off for many years, I opened them
pulled the power supply for a session with my capacitor reformation rig
cleanup. With that successfully accomplished, and finding that all
voltages were in
line, everything was reassembled. During the wait for the capacitors, I
interior pretty well with a vacuum and Windex. As a side note, three of
still had the platter brushes installed, and since I already had each
for power supply checkout, I went ahead and removed the brush assemblies.
Fortunately, the 'clean' set of drives are now fully functional, having
with one of the 11/23s.
Unfortunately, after mounting and LOADing a known good disk cartridge,
from the 'dirty' set will show READY after spinup. Though the details
are a bit
different, each drive emits a very noticeable sound, kind of a
(not squealing), that I think is indicative of dry bearings in the
spindle motor, or both. I wonder if dragging bearings are preventing
the drive from
becoming READY due to uneven RPM?
I've scoured the online documents for possible information regarding RL
lubrication, but I can't come up with anything that suggests 'in the field'
lubrication options. The RL01/RL02 Maintenance Guide talks about
Field Replaceable Units, but nothing about lubrication.
So a few questions for those in the know:
Could dragging bearings be the cause of no READY indication?
Has anyone had any experience lubricating the appropriate assemblies in
an RL drive?
If so, what lubricant is recommended, where is it applied, and how?
Removing the motor for lubrication is no problem, but I wonder if
spindle assembly would then necessitate a head alignment once it's back
I'm not sure I'm ready to go through that process just yet! Still, if I
need to do
it, I need to do it.
Any advice is welcome.
Assuming I can get this resolved, I'm in the market for a set of (2) RL
cables and a terminator. Anyone with some spares that they'd like an
please contact me off-list.
More information about the cctech