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DECONTAMINATING  APPARATUS  
WATER   TANK

TM-3-4230-218-12P Decontaminating Apparatus: Power-Driven Portable Type A/E32U-8 NSN: 4230-01-163-8660 Manual
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TM 3-4230-218-12&P b. Cleaning Spark Plugs. Same procedure for ner. (1) Allow NOTE cleaning spark plugs will be followed on engine and bur- engine to cool down prior to performing this procedure. DO NOT PULL ON SPARK PLUG TOR INSIDE. (2) Disconnect spark spark plug. CAUTION CABLE AS THIS COULD BREAK THE CONDUC- plug cable by pulling spark plug cap off CAUTION BE SURE THAT NO DIRT FALLS INTO THE SPARK PLUG HOLE. (3) (4) (5) (6) Use spark plug wrench to unscrew spark plug from engine cylinder head or burner weldment. Make sure metal sealing washer is attached to plug. Use wire brush to clean carbon deposits from electrode area of the plug. Dip  threaded  portion  of  plug  into  solvent  to  wash away  carbon  residue. Allow plug to air dry. Inspect plug for cracked insulator. Use feeler gage to check gap between the electrodes. This gap should be .030 in. for engine plug and .070 in. for burner plug. Obtaining a gap of .070 in. will require combining several blades (i. e. .030 in. + .025 in. + .015 in. ) of gap gage. Use gap gage to change plug gap if required. Be sure metal gasket is in place on plug prior to installation. Screw plug in as far as possible by hand. Tighten firmly with spark  plug  wrench  (approximately  1/8  turn  beyond  handtight). Push spark plug cap squarely over plug end. 3-17







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