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RESCUE SAW REPAIR (Continued) - TM-5-4210-229-14P_344
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TM-5-4210-229-14P Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
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RESCUE SAW REPAIR (Continued). - TM-5-4210-229-14P_346
TM5-4210-229-14&P 5-7. RESCUE SAW  REPAIR (Continued). (45) Remove     fuel     tank     and     disassemble     by removing  fuel  cap  (156),  O-ring  (157),  filter (158),   vent   kit   (159),   strainer   (160),   hose (161),   nipple   (162),   sleeve   (163),   and   fuel hose (164) from tank (165). (46)    Remove  screws  (150  and  166)  and  separate right and left hand crankcase halves. Remove  crankshaft  (167),  bearing  (168)  and gasket (169). (47) Remove cylinder pin (170) and bearing (171) from right hand crankcase half (172) and seal (173)  nut  (174),  and  bearing  (171)  from  left hand crankcase half (175). b. Rescue Saw Carburetor Disassembly. (1) Remove    four    screws    (176)    and    remove diaphragm  cover  (177)  with  diaphragm  (178) and gasket (179). (2) Remove    screw    (180),    [ever    (181),    lever spindle (182) and spring (183). (3) Remove   inlet   needle   valve   (184),   washer (185), and the valve (186). (4) Remove governor (187) and seal (188). (5) Remove  four  screws  (189),  fuel  pump  cover (190),   gasket   (191),   pump   diaphragm   (192) and strainer (193). (6) Remove  nipple  (194),  idle  screw  (195)  with nylon   ball   (196),   high   speed   adjust   screw (197)  with  spring  (198)  and  low  speed  adjust screw (199) with spring (200). (7) Remove  screw  (201)  and  throttle  flap  (202). Remove lockring (203), washer (204) and seal (205).      Slide   throttle   shaft   out   and   remove seal   (206),   two   bushings   (207),   and   spring (208) from shaft (209). (8) Remove screw (210), choke flap (211), choke shaft (212), and spring (213) with ball (214). INSPECTION a. Rescue Saw, Ignition Inspection (1) Remove   cable   (88)   from   spark   plug   (147). Hold   wire   by   insulation   with   terminal   end about 1/8 inch from metal body of spark plug. (2) Crank  engine.    If  a  bright  hot  spark  jumps gap, magneto is operating correctly. (3) Remove spark plug (147) and reconnect cable (88). (4) Ground   plug   into   cylinder   body   and   crank engine.  If hot spark jumps the spark gap, the ignition system is operating satisfactorily. b. Rescue Saw Spark Plug Inspection. (1) Remove   spark   plug   (147).      Check   for   any cracks   in   porcelain   and   for   points   that   are pitted or burned. (2) Check point gap with a wire feeler gauge. c. Rescue Saw Magneto Inspection. (1) Inspect   transistor   coil   (89)   for   cracked   or burned  insulation.    Make  sure  lead  wires  are intact,   especially   where   they   enter   the   coil. Inspect for open circuits, shorts, and grounds. Inspect armature plate (93) for cracks, breaks or excessive wear. (2) Inspect  electronic  ignition  (133)  for  damaged lead or dents or gouges in case. NOTE Move  blade  to  within  1  inch  of  magnet.    The blade   should   be   pulled   against   magnet   if magnet is properly charged. (3) Check  flywheel  magnets  by  holding  a  screw driver  on  extreme  end  of  handle  with  blade down. (4) Test magneto by actual engine operation. d. Rescue Saw Crankshaft and Piston Inspection. Never attempt to straighten a bent crankshaft. 5-14

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