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e. Push the resistor completely into the groove with either a mallet or
a piece of wood. It is very important to ensure that the resistor is
completely inserted into the groove and that the upper surface is level.
f. Install a new contact arm and if necessary, bend the arm either up or
down to obtain consistent contact with the resistor.
g. Re-install the shaft-bearing retainer and calibrate the potentiometer
before use.
3. To install a new calibration spring:
a. Remove the contact arm and the shaft-bearing retainer.
b. Carefully lift the calibration spring from the potentiometer assembly.
c. Install the new spring. When properly installed, it should tighten when
the center shaft is rotated counterclockwise.
d. Install a new contact arm and make adjustments as necessary to
obtain consistent contact with the resistor.
e. Loosen the three adjustment screws on the underside of the
potentiometer assembly and rotate the spring adjuster until the spring
rests at a relaxed state.
f. Ensure that the contact arm aligns with the contact strip and tighten
the three set screws.
g. Rotate the center shaft to ensure that the spring does not bind or rub
the potentiometer housing.
h. Replace the shaft-bearing retainer and calibrate the potentiometer.
