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Inspections on chain drive of main engine

Checks:
  1. Look for loose screws or bolts,
  2. Lube oil pipe damages,
  3. Jet nozzles for blockage or deformation,
  4. Rubber track guide ways for cracks. 
  5. Check teeth of chain wheels for abnormal wear( done by keeping a straight edge over the wear edge). 
  6. Check for cracks in chain, rollers and side plates. 
  7. Check the chain slackness by measuring the length of 10 chain links and compare with manufacturer data.
Chain tightening method: 
 Loosen the nuts on the chain tightener, bring the slack part of the chain in the chain tightener side by turning the engine, make sure the balancing weights are pointing downwards,tighten various bolt of the chain tightener as per instruction.
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