TM 10-3930-664-24 2-19.  OIL PRESSURE RELIEF VALVE REPLACEMENT This task covers:  Removal, Cleaning, Inspection, and Installation INITIAL SETUP: Tools and Test Equipment: Equipment Condition: General Mechanics Tool Kit (1, App.  E) Towbar lowered (para.  2-126) Torque Wrench (32, App.  E) Materials / Parts: O-Ring, Item 5 (1 ea.) A.  REMOVAL WARNING Heated  engine  parts  and  hot  oil  can burn   you.      Take   care   not   to   touch engine    parts    when    replacing    relief valve and related components. 1.     Release   hood   assembly   (2)   by   lifting   handle   (1). Open hood assembly. 2.     Remove  plug  (3)  from  oil  filter  head  (4).    Remove and discard O-ring (5). 3.     Remove  spring  (6)  and  pressure  regulator  plunger (7) from oil filter head (4). B.  CLEANING Clean  pressure  relief  valve  components  in  accordance with paragraph 1-24. 2-80