Tim,
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The rebuild and regrease of the thrust washers and bearings is not that difficult. The hardest part is removing the motor to worm assembly and getting the worm tension right when putting it all back? together. Then just spin off the clutch knobs and lift the shaft up and out. Have a nice clean work area laid out for the parts where you can spread everything around for inspection and degreasing. I have found gasoline and brush is the best degreaser, followed by a rinse with JetSpray Gumout Carb Cleaner (handle the solvents with care with much ventilation and place any rags or wash pans outside to dry somewhere safe).
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If your washers have worn by that much, it's time to replace them. But I'm not sure that would cause any 30s delay which may be by something else. Does the mount just stop, or does it cease getting corrective guide pulses?
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John
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Losmandy G11G2 on pier; refurbed Losmandy G11 with OnStep controller; SkyShed design roll-off observatory; ZWO ASI2600MM-P; ZWO ASI071MC; Sky-Watcher Esprit 100 ED with field flattener; Celestron C925 Edge HD with 0.7XFR, William Optics Zenithstar 61 APO; PHD2, NINA, Sequence Generator Pro and PixInsight user
