TM 10-5410-228-24
3.9.12 R22 Refrigerant Pressure Tubes and Valves Replacement Continued.
NOTE
This procedure covers the replacement of the following components and valves: Discharge
Line Vibration Absorber, Suction Line Solenoid Valve (Refrigeration Valve RSV1), Discharge
Check Valve and Bulkhead Access Valves.
All air conditioning pressure lines are replaced basically the same. The procedure provided
herein is typical in nature.
Remove and replace tape and insulation as required.
Remove/disassemble only to the extent necessary to remove or replace defective
assemblies/components. Use standard maintenance shop practices/procedures.
Flow nitrogen through tube assembly when brazing or unbrazing.
a. Removal (Refer to Figure 3-17)
(1)
Remove insulation tape and insulation from tubing as required.
(2)
Remove two nuts (1), two lockwashers (2), four flat washers (3), two screws (4) and four loop
clamps (5) from four tube assemblies. Discard two lockwashers (2).
(3)
Remove nut (6), lockwasher (7), flat washer (8), screw (9) and four loop clamps (10) from four
tube assemblies. Discard lockwasher (7).
(4)
Remove four nuts (11) securing four bulkhead access valves (12) to ECU.
(5)
Disconnect tube assembly (13) from compressor (14).
Removal and brazing of refrigerant tube assemblies shall be in accordance with safety
requirements. All safety requirements applicable to brazing of tubes shall be observed.
(6)
Remove discharge check valve (15) from tube assembly (13).
(7)
Remove discharge line vibration absorber (16) from tube assembly (13).
(8)
Disconnect cable assembly 1A4A1W1 connector P2 (17) from actuator RSV1 (18). Remove
actuator RSV1 (18) from suction line solenoid valve (19).
(9)
Remove two screws (20), two lockwashers (21) and two flat washers (22) securing mount (23) to
suction line solenoid valve (19). Discard two lockwashers (21).
(10) Remove two screws (24), two lockwashers (25) and two flat washers (26) securing mount (23) to
ECU. Discard two lockwashers (25).
(11) Remove tube assemblies (27, 28 and 29).
(12) Remove four screws (30), four lockwashers (31) and four flat washers (32) securing mounting
plate (33) to ECU. Discard four lockwashers (31).
(13) Remove four screws (34), four lockwashers (35) and four flat washers (36) securing mounting
plate (37) to ECU. Discard four lockwashers (35).
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