RL drive lubrication

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 course filters (which were deteriorating badly in all drives) and the accumulations in the power 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 was in pretty good condition, cleanliness wise. I replaced all four course filters, and checked the absolute filters, which were actually okay even in the dirty drives. Because all of these have been powered off for many years, I opened them up and pulled the power supply for a session with my capacitor reformation rig after cleanup. With that successfully accomplished, and finding that all voltages were in line, everything was reassembled. During the wait for the capacitors, I cleaned the interior pretty well with a vacuum and Windex. As a side note, three of the drives still had the platter brushes installed, and since I already had each drive opened for power supply checkout, I went ahead and removed the brush assemblies. Fortunately, the 'clean' set of drives are now fully functional, having been tested with one of the 11/23s. Unfortunately, after mounting and LOADing a known good disk cartridge, neither drive are a bit different, each drive emits a very noticeable sound, kind of a whining/rumbling sound (not squealing), that I think is indicative of dry bearings in the spindle, 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 drive lubrication, but I can't come up with anything that suggests 'in the field' lubrication options. The RL01/RL02 Maintenance Guide talks about disassembly and 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 removing the spindle assembly would then necessitate a head alignment once it's back in place? 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 connecting cables and a terminator. Anyone with some spares that they'd like an offer on, please contact me off-list. Thanks. J