TM 10-3930-659-20 12-4. SECONDARY STEERING PUMP RELIEF VALVE PRESSURE TEST. This Task Covers: Pressure Test Initial Setup Equipment Conditions: Materials/Parts: • Parking brake set (see TM 10-3930-659-10). •  Rags (Item 27, Appendix C) • Frame locking bar Installed (see TM  10-3930- •  Four preformed packings 659-10. • Hydraulic system warmed to operating temperature Personnel Required:  Two (see paragraph 2-29). • Cab skirts removed (see paragraph 14-6). References: •  TM 10-3930-659-10 Tools/Test Equipment: • General mechanic's tool kit (Item 44, Appendix F) • Pressure gage (Item 18, Appendix F) • Hose assembly (Item 20, Appendix F) • Tee (Item 38, Appendix F) NOTE A suitable container should be used to catch any draining hydraulic fluid.  Ensure that all spills are properly cleaned. PRESSURE TEST 1. Remove hose (2) and preformed packing (1) from secondary steering manifold (6).  Discard preformed packing. 2. Install preformed packing (5) and tee (4) on secondary steering manifold (6). 3. Install two preformed packings (3) on tee (4). 12-12