TM-9-2320-280-34

TRUCK, UTILITY: M998 SERIES

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

JANUARY 1996

TM-9-2320-280-34 - Page 715 of 1258

1 4 - 2 1 . E X PANSION VA LVE REPLACEMENT (Cont'd)

TM 9-2320-280-34

Change 1

1 4 - 1 1 5

N±O±T±E

Perform steps 1 through 3 for R-12 systems only.

1±

.

Lubricate O-rings (5), (9), and (13) with refrigerant oil and install on inlet tube (4), sight glass

tube (11), and pressure tube (7).

2±

.

Connect expansion valve (6) to sight glass tube (11) and inlet tube (4).

3±

.

Connect pressure tube (7) to evaporator outlet tube (1).

N±O±T±E

Perform steps 4 through 6 for FR-12 systems only.

4±

.

Lubricate O-ring (5) with refrigerant oil, and install O-ring (5) and thermo expansion valve (6) on

inlet tube (4).

5±

.

Lubricate O-ring (13) with refrigerant oil, and install O-ring (13) and pressure tube

(7) on evaporator

outlet tube (1).

6±

.

Lubricate two O-rings (9) with refrigerant oil, and install O-rings (9) and sight glass tube (11) on sight

glass (15) and thermo expansion valve (6).

7±

.

Install control tube (12) on evaporator outlet tube (1) with clamp (2).

8±

.

Wrap evaporator outlet tube (1) and control tube (12) with moisture seal (3) and work moisture

seal (3) together to form tight seal.

N±O±T±E

Perform step 9 for FR-12 systems only.

9±

.

Secure sight glass tube (11) to evaporator (14) with clamp (8) and screw (10).

FOLLOW-ON TASKS: • Close evaporator blower housing (TM 9-2320-280-20).

• Evacuate and charge air-conditioning system (para. 14-17).