TM 10-3930-659-20 12-12.    CROSSOVER RELIEF VALVE-TO-STEERING VALVE HOSES REPLACEMENT (Con't). 3. Remove hose (6) from adapter (8). 4. Remove two preformed packings (7) and adapter (8) from steering valve (9).  Discard preformed packings. 5. Remove hose (1) from adapter (11). 6. Remove two preformed packings (10) and adapter (11) from steering valve (9).  Discard preformed packings. b. INSTALLATION 1. Install adapter (11) and two new preformed packings (10) on steering valve (9). 2. Install hose (1) on adapter (11). 3. Install adapter (8) and two new preformed packings (7) on steering valve (9). 4. Install hose (6) on adapter (8). TA707576 12-36