TM 9-2320-209-20-3-1 c. Type A Replacement. FRAME 1 1. 2. 3. 4. Screw elbow (1) into low air pressure switch (2). Using 1/2-inch wrench, tighten elbow and set so end of elbow points down as shown. Aline switch (2) mounting holes with holes in firewall (3). Using 7/16-inch wrench, screw in and tighten two starwasher bolts (4). Join air line (5) to elbow (1). Using 5/8-inch wrench, tighten tube nut (6). NOTE Check tags put on plugs (7) during removal so that plugs are put back in right place. Put two electrical plugs (7) into receptacles on switch (2). Take off tags. NOTE Follow-on Maintenance Action Required: Start engine and check operation of low air pressure buzzer. Refer to TM 9-2320-209-10. END OF TASK 7-269