TM 10-3930-659-20 12-27.    PRIORITY VALVE RELIEF PRESSURE TEST (Con't). 11. Remove pressure gage (8) and hose (9) from adapter (4). 12. Remove  adapter  (4),  union  (5),  adapter  (7),  and  two  preformed  packings  (6)  from  priority  valve  (1).    Discard preformed packings. 13. Install new performed packing (2) and plug (3) on priority valve (1). FOLLOW-ON TASKS: • Install right transmission side guard (see paragraph 14-7). • Remove frame locking bar (see TM 10-3930-659-10) TA707607 12-70