Relatively long period of time used for, Velbon SX-501B had some inconvenience in locking lever action, dul and loose stopping. Careful investigation proved the malfunction was caused by the compression deformation in actually using position. It is difficult to reform the distorted portions, so increasing lever action pressure is recommended.
Though long used and worked well equipment should be deserted and thrown away, very trifle maintenance way will recover this situation. Additional insertion of 0.3mm Aluminum adjusting sim took effect, the material was from Canned Beer. Only insertion of Locking resistor when stored was increased a bit, but acceptable change at all.
This Velbon tripod will continue more 10 years in future.
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