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INSPECTION - TM-5-4210-220-12_314
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TM-5-4210-220-12 Truck Firefighting: Powered Pumper: Foam and Water 500-GPM Capacity; Centrifugal Pump Power Takeoff Driven Manual
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INSPECTION (cont) - TM-5-4210-220-12_316
TM 5-4210-220-12 4-15.  AUXILIARY POWER UNIT - Continued 4-15.11  Engine Crankshaft and Camshaft - Continued (9) Install expansion plugs in crankshaft. (10) Inspect main crankshaft bearings.  If crankshaft has     to     be     reground     or     replaced,     replace bearings using puller 7070.3595.46. (11) If original crankshaft is to be installed, measure inner diameter of journal bearings and compare with crankshaft journals (See table for specifications). (12) Inspect  bearing  end  plate.    Measure  seal  ring housing  diameter  A,  bearing  housing  diameter B,  and  centering  ring  housing  C.    In  each  case measure at least 3 different diameters. A Seal Housing 2.0472 - 2.0488 (51.96 - 52.00 mm) B Bearing Housing 1.7320 - 1.7336 (43.96 - 44.00 mm) C Centering Housing 4.8860 - 4.8872 (124.01 - 124.04 mm) (13) Replace   bearing   end   plate   if   any   housing   is worn beyond specification (see table) or any housing is out of round by more than 0.004 in. (0.010 mm). (14) Remove  oil  plug  from  end  of  camshaft.    Clean oil way with wire.  Replace oil plug. (15) Measure  camshaft  lobe  diameters  (Valve  lobes are   furthest   away   from   gear   and   are   narrower   than injector pump lobe).  Replace if below tolerance or lobes are severely grooved. Inlet & Exhaust Valve Injector Pump A B C D in. 1.095 - 1.103 1.3057 - 1.3061 1.095 - 1.103 1.375 - 1.379 mm 27.80 - 28.00 33.14 - 33.15 27.80 - 28.00 34.90 - 35.00 (16) Measure  camshaft  journal  diameters.    They  should  be  0.7864  -  0.7868  in.  (19.96  -  19.97  mm)  and  1.0220  - 1.0224 in. (25.94 - 25.95 mm).  Replace if below tolerance.  They cannot be reground. (17) Measure camshaft bearing diameters in crankcase and crankcase cover. 4-178

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