TM 10-3930-669-20 16-11.   HEATER VALVE REPLACEMENT. This task covers: a.  Removal b.  Cleaning/Inspection   c.  Installation INITIAL SETUP Tools and Special Tools Materials/Parts - Continued Tool Kit, General Mechanic's: Automotive Oil, Lubricating (Item 17, Appendix C) (Item 1, Appendix B) Solvent, Drycleaning (Item 20, Appendix C) Vise Jaws, Soft (Item 2, Appendix B) Tags, Identification (Item 21, Appendix C) Wrench, Torque (0 to 60 N•m) Gasket (2) (Item 12, Appendix B) Seal (2) Washer, Lock (2) Materials / Parts Seal (2) Tape, Teflon (Item 2, Appendix C) Cap and Plug Set (Item 4, Appendix B) Equipment Condition Rags, Wiping (Item 19, Appendix C) Cab removed (Para 15-2) a.  Removal. WARNING BURN HAZARD Allow  engine  to  cool  before  performing  maintenance  on  the  muffler,  exhaust  pipe,  exhaust manifold, or turbocharger.  If necessary, use insulated pads and gloves. NOTE Tag and mark all wires and hoses prior to removal. (1) Remove nut (1), lock washer (2), washer (3), and wire (4) from engine oil temperature sensor (5).  Discard lock washer. (2) Remove  nut  (6),  lock  washer  (7),  washer  (8),  wire  (9),  and  nut  (10)  from  oil  pressure  sending  unit  (11). Discard lock washer. 16-32