OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ofite.com45PreventativeMaintenancePotentiometer1. The potentiometer should be kept as clean as possible. Periodicallysubmerge the unit in solvent to remove cement and other materials.Contact ArmShaft-BearingRetainerCalibrationSpringResistorSet Screws2. To install a new resistor:a. Remove the four small screws holding the shaft-bearing retainer tothe potentiometer assembly.b. Remove the contact arm.c. Carefully lift the damaged resistor away from the potentiometer. Clearthe resistor groove of any foreign material.d. Carefully place the new resistor into the groove and ensure that it iscentered between the two terminating contacts.