When should diesel engine plungers be replaced/ how to identify original and duplicate plungers

When should diesel engine plungers be replaced/ how to identify original and duplicate plungers
Friends, if you are interested in learning the repair work of all diesel engines with one and two cylinders, then definitely subscribe to my channel. I provide videos with repairing technology and diesel engine technology in this channel.
Bharat institute of engineering and technology certified mechanic (kallyan barman) Patna (Bihar institute)
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your queries-
diesel engine fuel pump system
fuel pump plunger setting for diesel engine
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kaise pata kare plunger thik hai ki nehi
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