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Fig. 114 Sectional View of Valves
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TM-5-4210-230-14P-1 Aerial Ladder Fire Fighting Truck Manual
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Hydraulic Valve Lifters (Tappets)
ENGINE DIVISION SERVICE MANUAL TM 5-4210-230-14&P-1 ENGINE spring retainer.  On the intake valves, install the valve spring seat,   valve   stem   seal,   valve   spring,   damper   and   spring retainer. NOTE: Care should be taken to see the valve stem seals  are  installed  correctly.    If  they  are not,  their  effectiveness  in  directing  oil  to the  valve  guide  could  be  reduced,  Figure 117.    Notice  the  valve  stem  seal  is  under the spring retainer. Fig. 117 Cross Section of Intake and Exhaust Valves Installed in Head 1. Retainer 6. Intake valve 2. Spring 7. Roto coil 3. Seal 8. Exhaust valve 4. Damper 9. Insert 5. Seat Compress   the   valve   springs   with   a   valve   spring compressor  and  install  the  valve  spring  retainer  locks.    Be sure the retainer and locks are correctly seated on all valves. The cylinder head assembly complete with valves is ready for installation on the cylinder block or crankcase. Rocker Arm Assembly Individually   mounted   rocker   arms   are   retained   by flange  head  retaining  bolts  and  pivot  balls,  Figure  118.    All parts must be retained in the same order as they were on the engine. Clean all parts with a good cleaning solvent and use compressed  air  to  clean  out  the  oil  passages  in  the  rocker arms. Fig. 118 1. Retaining bolt 3. Rocker arm 2. Pivot ball Inspect   the   pivot   surface   of   each   rocker   arm   and pivot  ball  and  replace  any  parts  which  are  scuffed,  pitted  or excessively  worn.    Inspect  the  valve  stem  contact  surface  of each rocker arm and replace any rocker arm which is deeply pitted.    Inspect  the  rocker  arm  retaining  bolts  for  excessive wear  or  looseness  in  the  cylinder  head:  replace  if  condition exists. Push Rods The push rods are hollow and serve as oil galleries to lubricate   each   individual   rocker   arm   assembly.      Prior   to installation  the  push  rods  should  be  cleaned  thoroughly  and inspected for wear and deposits which may restrict the flow of oil to the rocker arm assemblies. Check  all  valve  lifter  push  rods  for  straightness  by rolling on a flat surface, Figure 119 Fig. 119 Checking Push Rod for Straightness 1. Bent valve lifter rod 2. Flat surface CGES-210  Page 43 PRINTED IN UNITED STATES OF AMERICA

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