TM 10-3930-669-20 6-6.  BLOWER BELT TENSIONER REPLACEMENT (CONT). (3) Inspect  switch  and  wires  for  damage,  cracks, burrs, and sharp edges. (4) Replace all damaged parts. c.  Installation. (1) Place   preformed   packing   (23)   on   broken   belt tensioner (18). (2) Install  preformed  packing  (23)  and  broken  belt tensioner  (18)  on  engine  (11)  with  washer  (22) and screw (21). Tighten nut to 18 lb-ft (25 N•m). (3) Apply sealing compound to screw (19). (4) Install screw (19) and washer (20) on blower belt tensioner (18). (5) Install blower belt tensioner pulley (4) on blower belt tensioner (18) with screw (12), two washers (17 and 16), washer (15), and nut (14).  Tighten nut to 18 lb-ft (25 N•m). WARNING Blower belt tensioner is under spring tension and could cause injury. (6) Using  a  wrench  on  screw  (12)  turn  blower  belt tensioner pulley (4) towards the right and install belt (13).  Slowly release tension. 6-16