FIGURE 4-4. MOTOR REMOVAL AND REPLACEMENT
a. Remove pressure switch cover by turning pressure switch cover nut counter clockwise and lifting cover off.
b. Always adjust the range spring nut (A) first, until the operating point on falling pressure is 175 PSI (1210 KPa).
c. Turning nut (A) clockwise will increase setting. Turning it counter clockwise will decrease setting.
adjustment changes both high and low operating points.
d. To adjust operating point on rising pressure, turn differential spring nut (B) clockwise to increase the pressure
difference between high and low operating points and counter clockwise to decrease pressure difference.
e. Begin adjustments by first turning compressor unit off by pushing STOP button on starter switch.