TM 1-4220-250-12&P
E.3 LRU-18/U LEAKAGE TEST FIXTURE INSTRUCTIONS.
1. Connector (MS22023-1 See Note 1 and 2)
2. Fitting Air Hose, Push-Type (2 Each, 4730-00-516-3826)
3. Coupling, Air Hose Male (Part of Item 2)
4. Fitting, Female, T, 1/8 Inch Pipe Thread (4730-00-278-3989)
5. Adapter, Male, 1/8 Inch Pipe Thread (3 Each 4730-00-186-7797)
6. Valve, Female, 1/8 Inch Pipe Thread (126231) (2 Each 4820-00-529-2609 See Note 3)
7. Adapter, Hose (08395) (4730-00-287-1784)
8. Hose, Rubber, 1/2 Inch O.D. (4720 00-540-1962)
9. Fitting, Street, L-Type 1/8 Inch Pipe Thread (4730 00-231-5605)
10. Coupling, Air Hose, Female (81895) (Part Of Item 2)
11. Adapter, 1/8 to 1/4 Inch (4730 00-529-1487)
12. Gauge, Pressure, 0 to 5 PSIG (Or Equal) (6685-00-953-9090 See Note 4)
NOTES
1. Fill large threaded hole with silicone seal (manufactured by General Electric). Silicone seal must be
tapered to receive oral valve. Taper may be formed with a small wooden stick while applying silicone
seal or allowing seal to cure sufficiently to allow use of a sharp knife to form taper. Insure air passage is
provided for.
2. Use hose, rubber, 5/8 inches I.D. if MS 22023-1 is not available.
3. Ensure air feed valve is closed prior to opening of measuring device.
4. Read gauge in vertical position.
Figure E-2. LRU-18/U Leakage Test Fixture.
E-2
