TM 9-2320-280-34
14-21. EXPANSION VALVE REPLACEMENT (R-12) (Cont'd)
b. Installation
CAUTION
During installation of expansion valve, avoid excessive bending or
kinking of control tube and pressure tube.
Avoid overtightening of clamp securing expansion valve control tube
to outlet tube.
1.
Lubricate O-rings (6), (9), and (11) with lubricating oil and install on inlet tube (4), sight glass
line (5), and pressure tube (8).
2.
Connect expansion valve (7) to sight glass line (5) and inlet tube (4).
3.
Connect pressure tube (8) to evaporator outlet tube (1).
4.
Deleted.
5.
Deleted.
6.
Deleted.
7.
Install control tube (10) on evaporator outlet tube (1) with clamp (2).
8.
Wrap evaporator outlet tube (1) and control tube (10) with nonmetallic seal (2) to form tight seal.
9.
Deleted.
4
3
5
2
6
7
1
8
11
9
10
FOLLOW-ON TASKS: Close evaporator blower housing (TM 9-2320-280-20).
Evacuate and charge air-conditioning system (para. 14-17).
Change 2
14-115
