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Ratio Relay Valve

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TM-9-2330-380-14-P Semitrailer Van: Electronic Tactical 12-Ton 4-Wheel XM1063 (NSN 2330-01-224-9244) and M129A4 (NSN 2330-01-372-5642) Manual

Brake Air Chamber

TM 9-2330-380-14&P

4-45. Ratio Relay Valve (cont'd)

b. Cleaning

1. Clean mud and dirt from exposed surfaces with water and a stiff brush.

WARNING

Dry cleaning sosolvent (P-D-680) is toxic and flammable. Avoid prolonged breathing of vapors. Avoid

skin contact. Use only in a well-ventilated area. Keep away from open flame. Flash point of solvent

is 138o F (50o C).

2. Remove grease and oil with dry cleaning solvent (item 3, Appendix E). Dry thoroughly.

c. Inspection

1. Clean mud and dirt from exposed surfaces with water and a stiff brush (item 15, Appendix E).

2. Inspect for loose, missing or damaged parts. Replace defective parts.

3. Inspect valve, elbows and connectors for cracks, dents, holes and warps. Replace defective parts.

4. Inspect for rust, corrosion and marred paint. Clean, treat, prime and paint as required.

d. Installation

NOTE

Apply teflon tape (item 12, Appendix E) to threads of air line connections before installation.

1. Install nipple (8) at rear of ratio relay valve. Install tee (6) to top of ratio relay valve.

2. Install ratio relay valve (7) by turning entire assembly clockwise.

3. Install two elbows (4) and two male connectors (5).

4. Connect eight air lines (3) in accordance with tagged identification.

5. Close all drain cocks (1) and pressurize air brake system.

6. Check for leaks (para. 4-43b).

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