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TM9-2815-202-34 4-31. OIL  PRESSURE  REGULATOR  AND  RELIEF  VALVE  REPLACEMENT  (Cent) b.  Repair (1) Regulator Valve WARNING Firmly  secure  spring  during  removal.  A  spring  loaded  mechanism  ejects parts  at  high  speed  If  released  In injury may result. (a) (b) Clamp  regulator  assembly  in  a vise with soft jaws. Compress spring  (13)  and  remove  retaining pin (14) from regulator body (15). .Remove  spring  seat  (16),  spring an uncontrolled manner. Personal (13), and valve (17) from regulator  body  (15). WARNING 13 16 (2) Compressed  air  used  for  cleaning  purposes  will  not  exceed  30  psi.  Use only  with  effective  chip  guarding- and  personal  protective  equipment (goggles/  shield,  gloves,  etc). (c) (d) (e) (f) (9) (h) Clean all parts with fuel oil and dry with compressed air. Inspect parts for wear and damage. Regulator valve must move freely in valve body. Replace valve and valve body if parts are scored and cannot be cleaned with crocus cloth. Replace a pitted or fractured spring. Assemble  valve  assembly  by  first  applying  engine oil to outer face of valve (17) and slide it into regulator body (15), closed end first. Install spring (13) and spring seat (16) into regulator body (15). While  compressing  spring,  install  retaining  pin Relief Valve WARNING (14) above spring seat (16). l l + . Firmly  secure  spring  during  removal.  A  spring  loaded  mechanism  ejects parts  at  high  speed  If  released  In  an  uncontrolled  manner.  Personal injury may result. (a) Clamp relief valve assembly in a vise with soft  iaws. CornDress.@rms(18  and 19) and l .   . remove retaining pin (20) f~om     relief    valve    body    (21).    “    “ -  ‘  ‘ (b)  Remove  spring  seat  (22),  springs  (18  and  19),  two  inner  spring  seats  (23),  and  valve (24) from relief valve body (21 ). e 4-122


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