TM 10-3930-659-34 4-68. LOCKING CONTROL VALVE REPAIR. This Task Covers: a. Disassembly c.   Assembly b. Cleaning and Inspection Initial Setup: Equipment Conditions: Materials/Parts: • Locking control valve removed (see TM 10-3930- • Lubricating oil (Item 38, Appendix B) 659-20). • Dry cleaning solvent (Item 47, Appendix B) • One repair kit Tools/Test Equipment: • General mechanic's tool kit (Item 71, Appendix E) References: • Compressor unit (Item 16, Appendix E) • TM 10-3930-659-20 General Safety Instructions: • Dry cleaning solvent is flammable and must not be used near open flame.  Use only in a well-ventilated area. • Compressed air used for cleaning purposes should never exceed 30 psi (207 kPa). a. DISASSEMBLY 1. Remove valve cartridge (1) from locking control valve (8). NOTE Note position of seals and backup rings to aid during assembly. 2. Remove  three  backup  rings  (2,  4,  and  6)  and  seals  (3,  5,  and  7)  from  valve  cartridge  (1).    Discard  seals  and backup rings. 3. Remove valve cartridge (15) from locking control valve (8). NOTE Note position of seals and backup rings to aid during assembly. 4. Remove three backup rings (10, 12, and 14) and seals (9, 11, and 13) from valve cartridge (15).  Discard seals and backup rings. 4-280