Replace the bushing, have the drive gear faced (remove material to match the thickness of the washer .032”.) Use a precision hardened washer between the two parts. Two similar metals should not be in contact with each other.
Mcmaster Carr #5909K44 $1.10

Last edited by TRENDZ; 03/05/20 07:56 AM.
"use it 'till it breaks, replace as needed"