TM 10-3930-659-20 12-8. PRIORITY VALVE-TO-MAIN HYDRAULIC PUMP LINE 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). •  Three preformed packings • Hydraulic reservoir drained (see LO 10-3930- 659-12) • Right transmission side guard removed (see para- References: graph 14-7) •  LO 10-3930-659-12 •  TM 10-3930659-10 Tools/Test Equipment: • General mechanic's tool kit (Item 44, Appendix F) • Adjustable wrench (Item 49, 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  four  screws  (5),  two  flanges  (3),  line  (1),  and  preformed  packing  (2)  from  main  hydraulic  pump  (4). Discard preformed packing. TA707567 12-26