Quoted from bssbllr:
I agree with ronss clean all units. Take pics as you take apart. Use the grease on all metal on metal components. The grease should have a Teflon in it. Plastic on metal and plastic on plastic does not need grease. The original lube they used gets old and gums up and starts to bind mechanisms so a good cleaning and greasing will do wonders.
Coil sleeves are designed to "run dry" any lubrication applied there would attract and capture dust and debris. same with any open brass gears in a score motor you may encounter (there is a felt pad for a minimal amount of lubrication)
Coil sleeves are readily available and can be easily replaced if damaged
A thin layer of Super Lube or "teflon gel" on the hub of the stepper gear is recommended.
Step 5e. After the shaft/cog and hole is clean, put a thin layer of Teflon Lube Gel on the shaft. Install the shaft into the Stepper Unit. If a switch was swung out of the way, put it back and re-install its attachment screw.
The above advise about taking pictures is a MUST !!! but also make note of the "clock spring" attachment points and count the number of turns as you unwind.