TM 10-3930-659-20 17-1. MAIN HYDRAULIC PUMP FLOW TEST. This Task Covers: Flow 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 •  Five preformed packings 659-10). • Right side cab skirt removed (see paragraph 14-6). Personnel Required:  Two • Right transmission side guard removed (see para- graph 14-7). References: Tools/Test Equipment: •  TM 10-3930-659-10 • General mechanic's tool kit (Item 44, Appendix F) • Fitting (Item 13, Appendix F) • Fitting (Item 14, Appendix F) • Fitting (Item 15, Appendix F) • Pressure gage (Item 18, Appendix F) • Hose assembly (Item 20, Appendix F) • Tee (Item 40, Appendix F) • Hydraulic tester (Item 41, Appendix F) NOTE A suitable container should be used to catch any draining hydraulic fluid.  Ensure that all spills are properly cleaned. FLOW TEST 1. Remove line (4) and preformed packing (3) from priority valve (2).  Discard preformed packing. 2. Remove priority valve (2) from mounting plate (1) (see paragraph 12-28). 3. Install fitting (5), preformed packing (6), and tee (7) on line (4). 4. Install preformed packing (19), fitting (18), and hydraulic tester inlet hose (17) on tee (7). 5. Install preformed packing (13), fitting (14), and hydraulic tester outlet hose (15) on priority valve (2). 6. Check that hydraulic tester (16) loading valve is in OPEN position. 7. Install preformed packing (8), two fittings (9 and 10), hose (11), and pressure gage (12) on tee (7). 8. Warm hydraulic system to operating temperature (see paragraph 2-29). 9. Start engine and run at high engine idle speed (see TM 10-3930-659-10). 17-2