TM 10-3930-659-20 12-12.    CROSSOVER RELIEF VALVE-TO-STEERING VALVE HOSES REPLACEMENT. This task covers: a. Removal b. Installation INITIAL SETUP: Equipment Conditions: Materials/Parts: • Frame  locking bar Installed (see TM  10-3930-   • Rags (Item 27, Appendix C) 659-10). • Six preformed packings • Cab skirts removed (see paragraph 14-6). References: Tools/Test Equipment: • TM 103930659-10 • General mechanic's tool kit (Item 44, Appendix F) NOTE A suitable container should be used to catch any draining hydraulic fluid.  Ensure that all spills are properly cleaned. a. REMOVAL 1. Remove hose (6) and preformed packing (7) from tee (5) at crossover relief valve (4).   Discard pre- formed packing. 2. Remove hose (1) and preformed packing (2) from tee (3) at crossover relief valve (4).   Discard preformed packing. TA707575 12-35