Английский язык: Сборник текстов и упражнений для студентов специальности "Эксплуатация судовых энергетических установок". Писарева Л.П. - 39 стр.

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КамчатГТУ | Петропавловск-Камчатский

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3. When does reboring become necessary?
4. What is the nature of lacquer deposits?
5. What factors lead to excessive cylinder wear?
6. What deposits way foul the ports?
7. How can access to ports be arranged?
VII. Retell the text using the key sentences.
Lesson 15
Location of Troubles (Part I)
Below are set out the various troubles most likely to be encountered, together with their
causes and remedies.
Engine Will Not Start
1 .Not turned fast enough by hand.
Try to continue turning after the valve lifter had been dropped. There is no danger of
backfiring as with petrol engines. See that the reverse gear is in neutral.
2. Loss of compression.
a) Sticky valves. Remove and clean the valves spindles, and if necessary, polish with fine
emery cloth.
b) Insufficient valve clearance. Check the valve clearances.
c) Valve seatings not tight. Examine these, and if they show sign of being pitted and are
not seated properly, they should be slightly ground in.
d) Dry piston after standing. Pour a small quantity of lubricating oil into each air intake.
3. Air in the fuel system.
Engine Runs Irregularly
1. Sticky valves.
2. Dirty atomizers.
3. Air in the fuel system.
4. A fuel- pump delivery valve has stuck up.
5. Remove the delivery valve. If the delivery valve is found to be stuck, it will be due to
dirt, and carefully cleaning the valve and its guide it should move freely. On no account must
emery paper or powder be used.
6. Water in the fuel.
7. Drain all parts of the fuel system, including the fuel pump and fill up with clean fuel.
8. Fuel filter chocked.
9.Remove and wash.
Engine Knocks.
1. Time of injection is incorrect. Check and reset, if necessary.
2. A bearing is loose. Examine all bearings and adjust, if necessary.
3. A piston is seizing. See that the engine is not being over loaded. Examine the pistons
and smooth up any rough parts on the pistons and in the liners.
4. Carbon on the pistons hittings the cylinder heads. Decarbonize.
Note- If the engine is heard to be knocking at any time it must be slowed down at
once, and if possible stopped and the cause investigated. On no account must it be allowed to
continue running, except at a greatly reduced speed.
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      3. When does reboring become necessary?
      4. What is the nature of lacquer deposits?
      5. What factors lead to excessive cylinder wear?
      6. What deposits way foul the ports?
      7. How can access to ports be arranged?

      VII. Retell the text using the key sentences.




                                          Lesson 15
                                 Location of Troubles (Part I)

     Below are set out the various troubles most likely to be encountered, together with their
causes and remedies.

      Engine Will Not Start
      1 .Not turned fast enough by hand.
      Try to continue turning after the valve lifter had been dropped. There is no danger of
backfiring as with petrol engines. See that the reverse gear is in neutral.
      2. Loss of compression.
      a) Sticky valves. Remove and clean the valves spindles, and if necessary, polish with fine
emery cloth.
      b) Insufficient valve clearance. Check the valve clearances.
      c) Valve seatings not tight. Examine these, and if they show sign of being pitted and are
not seated properly, they should be slightly ground in.
      d) Dry piston after standing. Pour a small quantity of lubricating oil into each air intake.
      3. Air in the fuel system.

       Engine Runs Irregularly
       1. Sticky valves.
       2. Dirty atomizers.
       3. Air in the fuel system.
       4. A fuel- pump delivery valve has stuck up.
       5. Remove the delivery valve. If the delivery valve is found to be stuck, it will be due to
dirt, and carefully cleaning the valve and its guide it should move freely. On no account must
emery paper or powder be used.
       6. Water in the fuel.
       7. Drain all parts of the fuel system, including the fuel pump and fill up with clean fuel.
       8. Fuel filter chocked.
       9.Remove and wash.

      Engine Knocks.
      1. Time of injection is incorrect. Check and reset, if necessary.
      2. A bearing is loose. Examine all bearings and adjust, if necessary.
      3. A piston is seizing. See that the engine is not being over loaded. Examine the pistons
and smooth up any rough parts on the pistons and in the liners.
      4. Carbon on the pistons hittings the cylinder heads. Decarbonize.
      Note- If the engine is heard to be knocking at any time it must be slowed down at
once, and if possible stopped and the cause investigated. On no account must it be allowed to
continue running, except at a greatly reduced speed.

                                               39

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