Pressure Switches. - TM-5-4120-352-140094

TM 5-4120-352-14

(1) Close louver blades and tighten screw in

(4) Remove screw, lock washer and loop

mechanical post to lock wire on that end.

clamp.

(2) Extend actuator rod until there is a 1/4

(5) Remove control casing outer nuts at each

inch space between inner edge of mechanical post

end and remove push-pull control.

bracket and the face of the cylinder. Tighten the

(6) Disconnect elbow swivel nut from end of

mechanical post screw.

actuator cylinder.

(3) Refer to figure 4-5 and install housing top

(7) Remove two nuts and lock washers from

covers.

evaporator side of partition and remove actuator

(4) Refer to figure 6-2 and charge the refrig-

cylinder.

erant system.

b. Installation. Install actuator cylinder and

control as follows:

(1) Install actuator cylinder (fig. 5-6) with

5-21. Pressure Switches.

studs through openings in partition. Install lock

a. Removal. Remove pressure cutout switches

washers and nuts on studs.

(fig. 4-20) as follows:

(2) Connect elbow swivel nut.

(1) Refer to figure 6-1 and discharge the re-

(3) Install push-pull control. Place outer con-

frigeration system.

trol casing nuts (fig. 5-5) over wire and insert wire

(2) Refer to paragraph 4-43 and remove junc-

ends into openings in mechanical posts on louver

tion box. Disconnect electrical leads. Refer to figure

lever and actuator cylinders.

4-5 and remove housing rear and center top covers.

(4) Install control casing nuts on casing to

(3) Remove two mounting screws and lock

hold control in position. Install loop clamp, screw,

washers from each switch.

and lock washer.

(4) Refer to figure 5-7 and disconnect capil-

(5) Adjust control as described in c below.

lary tube nuts. Remove grommet and pull capillary

c. Adjustment. Before system is charged, ad-

tubes through partition.

just louver push-pull control as follows:

5-16