6. Bar, top
7. Contact board assy
8. Spring, equalizer
Screw, pressure adjusting
9. Spring, main
Screw and nut, differential adjusting
10. Spring, toggle
Figure 5-14. Pressure switch assembly.
(7), conical spring (3), main spring (9), equalizer spring
turn the pressure adjusting screw clockwise.
(8), top bar (6), in frame assembly (14), securing with
differential adjusting screw and nut (5), and pressure
adjusting screw (4). Install cover (1).
d. To increase the difference between the CUT-IN
and CUT-OUT pressure turn the differential screw
switch reversing the removal procedure.
e. To decrease the difference between the CUT-IN
(3) Set air pressure adjustment as des cribed
and CUT-OUT pressure, turn the differential screw
5-9. Air Pressure Adjustment.
a. Start the air compressor (para 2-2)
The pressure switch is preset by
When adjusting the differential
manufacturer at 165 psi CUT-IN, and 190 psi CUT-OUT
screw, do not turn it farther than it
setting. If adjustment is necessary, shut off the outside
will turn easily.
f. To increase the differential and maintain the
b. Remove cover from pressure switch.
same CUT-OUT pressure, turn the differential screw
clockwise and, at the same time, turn the pressure
c. To raise the CUT-IN and CUT-OUT pressure
adjusting screw counterclockwise.