[TR] skreeching tachometer

[fred zampa]

hi everyone:
i am new here and i come bearing a problem :
the tachometer on my 1966 tr4a makes unbearable screeeeeming noise.    the noise never goes away .        time, distance, speed , weather , and temperature  make no difference. 
i disconnected the cable to achieve blessed quiet. 
the tach is now out    and sitting on my workbench.                                                                           all i know to do is take it apart   and oil it.  is that a good idea ?   risky ?  what sort of lubricant ? is there anything else i should look for ?
thanks              fred zampa            macon ga

















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