TM 9-2320-289-34
10-27. AIR
CONDITIONER
EXPANSION
VALVE,
EVAPORATOR,
AND
RECEIVER-DEHYDRATOR REPLACEMENT (M1010).
This task covers:
a.
Removal
b. Installation
INITIAL SETUP:
Equipment Condition
Materials/Parts
l Air conditioner cover assembly removed.
l One “O” ring
(See TM 9-2320-289-20)
• Seven preformed packing inserts
l Air conditioning system discharged.
l Refrigerant oil (Item 55, Appendix B)
(See paragraph 10-21)
l Thermal insulation tape
(Item 67, Appendix B)
a.
REMOVAL
CAUTION
Ensure that all openings and connections are immediately plugged after
disconnection to prevent contamination of air conditioning system.
NOTE
l If removing expansion valve (10), perform steps 1-3.
l If removing evaporator (1), perform steps 1-6.
l If removing receiver-dehydrator (14), perform steps 2, 7, and 8.
l If removing drain pan (33) and drain hoses (28), perform steps 1-6,
and 9.
. Ensure that all leads and lines are tagged for installation.
1.
Remove thermal insulation tape from expansion valve (10). Disconnect expansion valve from
evaporator (1), Remove and discard “ O“ ring (9) and preformed packing insert (8).
2.
Remove outlet line (13), Remove and discard 2 preformed packing inserts (12).
3.
Remove and discard thermal insulation tape securing temperature sensing bulb (11) to
evaporator (1) outlet line. Remove expansion valve (10),
4.
Disconnect outlet line (18) from evaporator (1). Remove and discard preformed packing insert
(21). Remove 2 screws (5) and washers (4).
5.
Disconnect leads from low pressure switch (7). Remove low pressure switch and core (6) from
evaporator (1) if damaged.
CAUTION
Be careful not to bend evaporator (1) fins during removal.
6.
Remove 12 screws, evaporator insulation, and cover, and set cover aside. Remove 4 screws
(31), washers (32), and evaporator (1) from air conditioner assembly (30). Remove and
discard thermal insulation tape from evaporator line if replacing evaporator.
10-108
