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In this video I will show how to fix the problem in 20 minutes without removing the fuel pump from the T-16, T-25, T-40 engines of all high-pressure fuel pumps. I will show how to remove the plunger from the fuel equipment without removing it from the engine. I will show the operating principle of the plunger of the ND 21.2, ND21.4 fuel pump. We will find out what other reasons there are for the failure of the fuel pump.