Maintenances

Loosening and re-tightening of frontal hub center locking nut diminished the strange noise while low speed turning phase, this procedure was performed by a TOYOTA dealer engineer the day before yesterday after actual checking by himself. His attempt was exactly to the point, the noise disappeared completely at that time, but still remains a bit on the right side, this affair noticed me of the importance of bolt nut tightening process should be done with inviting definite concentrations, not to strain the parts, even distribution of torque on the tightening surfaces are essential at all.
Basically, the fact the tightening way affects on the distortion of hub might mean the distortion of hub itself, as a final measures for this problem, replacement of hub with hub bearing might be one of the way to be chosen.

My own curiosity is now toward the repairing of working chairs in my laboratory, so off time this afternoon would be spent no the purpose, not on automobiles.
Water tube wiring would be replaced after over 20 years use before some miserable trouble might be happened. Tubes in different color and connecting parts are all prepared.
Also, TAKARA chair shows some malfunction of preset electric switching system, #1 preset lay-down does not work, check it!