Quantcast 2-19.  CAMSHAFT,  TIMING  CHAIN,  AND  DRIVE  GEARS  REPAIR

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a. Cleaning TM 9-2815-237-34 2-19.  CAMSHAFT,  TIMING  CHAIN,  AND  DRIVE  GEARS  REPAIR This  task  covers: a. Cleaning b. Inspection INITIAL  SETUP Tools Equipment  Condition General  mechanic’s  tool  kit: Engine  disassembled  into  subassemblies automotive  (Appendix  E,  Item  1) (para.  2-15). Micrometer (Appendix E, Item 16) “V” blocks (Appendix E, Item 21) Dial indicator (Appendix E, Item 10) Manual  References TM 9-2815-237-34P Clean all components in accordance with para. 2-9. b.  Inspection 1. 2. 3. 4. 5. 6. 7. NOTE l For  general  inspection  instructions,  refer  to    para.  2-10. l All lifters must be replaced when replacing camshaft. Inspect camshaft bearing journals (7) and lobes (8) for damage. Replace camshaft (6) if damaged. Measure diameter of bearing journals (7) using outside micrometer. Replace camshaft (6) if any bearing journal (7) is out of specification (table 2-2 or 2-3). Support  camshaft  (6)  on  "V"  blocks. Using dial indicator and “V" blocks, measure cam lobe (8) lift. Replace camshaft (6) if any cam lobe  (8)  is  out  of  specification  (table  2-2  or  2-3). Inspect crankshaft sprocket (9), camshaft sprocket (3), pump drive gear (10), and pump driven gear  (1)  for  damage.  Replace  any  gear  or  sprocket  if  damaged. Inspect timing chain (2) for cracks, breaks, or binding. Replace if cracked, broken, or binding. Inspect camshaft thrust plate (4) and spacer (5) for damage. Replace if damaged. 2-58


 


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