TM 10-3930-659-20 12-8. PRIORITY VALVE-TO-MAIN HYDRAULIC PUMP LINE REPLACEMENT (Con't). 2. Remove line (1) from adapter (8). 3. Remove adapter (8) and two preformed packings (7) from priority valve (6).  Discard preformed packings. b. INSTALLATION 1. Install two new preformed packings (7) and adapter (8) on priority valve (6). 2. Install line (1) on adapter (8). 3. Position new preformed packing (2) and line (1) on main hydraulic pump (4), and install two flanges (3) with four screws (5). FOLLOW - ON TASKS: • Fill hydraulic reservoir with hydraulic fluid (see TM 10-3930-659-10). • Install right transmission side guard (see paragraph 14-7). • Remove frame locking bar (see TM 10-3930-659-10). TA707568 12-27