TM 9-4120-407-14
4-22. SAFETY CONTROL BOX (PRESSURE SWITCHES) TESTING AND REPLACEMENT. (Cont)
c.
Installation.
(1) Low Pressure Switch.
( a ) Wrap insulation tape around low pressure switch (13) tube.
(b) Carefully install low pressure switch (13) and grommet (21).
(c) Connect coupling nut (20).
(d) Connect wire leads onto two terminals (17) using tags and wiring diagram Figure 3-5. Remove
tags.
(e) Install cover (15) and clip (16).
(f) Carefully push low pressure switch (13) in and install two screws (14).
(g) Carefully push panel (6) in and install four screws (5).
(h) Install six screws (1), new lock washers (2), and flat washers (3).
(i) Install new refrigerant desiccant dehydrator. See paragraph 4-20.
(2) High Pressure Switch.
( a ) Wrap insulation tape around high pressure switch (7) tube.
(b)
Carefully install high pressure switch (7) and grommet (19).
(c) Connect coupling nut (18).
(d) Connect wire leads onto two terminals (12) using tags and wiring diagram Figure 3-5. Remove
tags.
(e) Install cover (9) and clip (10).
(f) Carefully push high pressure switch (7) in and install two screws (8).
(g) Carefully push panel (6) in and install four screws (5).
( h ) Install six screws (1), new lock washers (2), and flat washers (3).
(i)
Install new refrigerant desiccant dehydrator. See paragraph 4-20.
NOTE
FOLLOW-ON MAINTENANCE:
Connect power cable to input power connector. See para 3-6.
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