Page 36 - CTS - Mechanic Diesel - TP
P. 36

MECHANIC DIESEL - CITS



           EXERCISE 2.3: Carry out cylinder leakage test


            Objectives

           At the end of this exercise you shall be able to
           •  clean the cylinder block and locate cracks distortion
           •  check cylinder block leakage.
           Requirements


           Tools/Instruments                                   Materials/Components
           •  Trainee’s tool kit                - 1 No.        •  Tray                            - 1 No.
           •  Scraper                           - 1 No.        •  Cotton cloth                    - as reqd.
                                                               •  Kerosene                        - as reqd.
           Equipments/Machines                                 •  Soap oil                        - as reqd.
           •  Engine cylinder block             - 1 No.        •  Lube oil                        - as reqd.
           •  Multi cylinder diesel engine      - 1 No.        •  Steel plate with rubber pad     - as reqd.
           •  Air compressor, Water washer      - 1 No.        •  Hot water                       - as reqd.

            Procedure

           TASK 1: Cleaning the cylinder block

           1  Put the cylinder block on wooden blocks (Fig 1)
           2  Clean cylinder block with suitable solvent or steam.             Fig 1
           3  Clean the oil passages of cylinder block with help of wire brush.
           4  Remove all sludge of dirt and carbon deposits in crank case, cylinder
              walls and valve chambers.
           5  Remove carbon deposits in cylinder block.
           6  Use scrapper to remove hard carbon deposits and take care with out
              damage the highly finished surfaces.
           7  Clean the cylinder block by using compressed air blast.
           8  Visually check the cylinder block for cracks and damages.
           9  Replace the cylinder block if any damage is found.


           TASK 2: Descaling water passages of cylinder block
           1  put the engine on two wooden block                        Fig 1
           2  Clean the engine block with suitable solvent
           3  Descale water passages by injecting water with suitable solvent
              at high pressure.
           4  Clean the cylinder block by using compressed air blast. (Fig 1)
           5  Check engine block visually for cracks.
           6  Fit steel plate (1) with rubber pads on cylinder block to close
              water jackets opening and also fit side sealing plate.
           7  Fit sealing plate (2) with adapter on the front face of the block
              and connect rubber hose (4) to hand operated pump (3) dipped
              in a container of hot water of 70oC to 80oC temperature.
           8  Pump  water  in  cylinder  block  at  approximate  5kg./cm2  and
              check cylinder block correctly for leakage.
           9  If leakage found in cylinder block Repair/ replace it.
           10 Clean the cylinder block oil gallery passages.
           11 Clean the oil pipe lines of engine.



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