TM 10-3930-669-20 7-41.  ENGINE OIL TEMPERATURE SENSOR REPLACEMENT. This task covers: a.    Removal b.    Installation INITIAL SETUP Tools and Special Tools Tool Kit, General Mechanic's: Automotive (Item 1, Appendix B) Materials / Parts Cap and Plug Set (Item 5, Appendix B) Rags, Wiping (Item 19, Appendix C) Washer, Lock Equipment Condition Engine OFF (TM 10-3930-669-10) Parking brake applied (TM 10-3930-669-1( ) Wheels chocked (TM 10-3930-669-10) Cab door opened (TM 10-3930-669-10) Engine access cover opened (TM 10-3930-669-10) 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. (1) Remove  nut  (1),  lock  washer  (2),  washer  (3),  and  wire  (4)  from  oil  temperature  sensor  (5).    Discard lock washer. (2) Using a wiping rag, clean area around engine oil temperature sensor (5) and heater valve (6). NOTE Cap and plug engine oil temperature sensor and heater valve when removed. (3) Remove engine oil temperature sensor (5) from heater valve (6). 7-92