Page 90 - CTS - Mechanic Diesel - TP
P. 90

MECHANIC DIESEL - CITS



           EXERCISE 3.5: Servicing  the  exhaust  system


            Objectives


           At the end of this exercise you shall be able to
           •   remove and clean the manifold, silencer, tail pipe and refit
           •   remove and clean the catalytic converter, muffer and refit it.

           Requirements


           Tools/Instruments                                   Materials/Components
           •  Trainees tools kit            - 1 No.            •  Kerosene                      - as reqd.
           •  Scraper                       - 1 No.            •  Soap oil                      - as reqd.
           •  Straight edge                 - 1 No.            •  Cleaning cloth                - as reqd.
           •  Feeler gauge                  - 1 No.            •  Emery sheet                   - as reqd.
           •  Scraper                       - 1 No.            •  Wire brush                    - as reqd.
           Equipments/Machines                                 •  Manifold gaskets              - as reqd.
           •  Diesel engine                 - 1 No.


           Procedure

           •  Loosen the nuts (2) and disconnect the exhaust pipe (3) from the   Fig 1
              exhaust manifold (4).  (Fig 1)

           •  Remove the exhaust manifold (4) from the cylinder head.
           •  Disconnect  the  exhaust  pipe  (3)  and  tailpipe  (9),  and  catalytic
              converter (11) from the muffler (10) after loosening the clamp bolts
              and nuts.  (Fig 2)
           •   Scrape the carbon deposits from the mounting faces of the manifold
              with a scraper (8).
           •   Inspect the manifold flanges (5) for alignment of level by using a
              straight edge (6).
           •   Scrape the carbon deposit from the exhaust manifold using a wire/
              brush.  (In some engines the exhaust manifold is in more than one
              piece.  Remove them separately and clean.)

           •   Inspect the exhaust manifold for any damage/crack.  if necessary,
              replace it.

            Fig 2





                                                               •  Inspect  the  tailpipe  (9)  and  exhaust  pipe  (3)  for
                                                                  any crack/damage etc.
                                                               •   Attach the scrapers (11) on the wire rope (12).
                                                               •   Insert a wire rope (12) in the exhaust pipe (3) and
                                                                  tailpipe (9) till it comes out at the other end.  Clean
                                                                  the exhaust pipe and tailpipe by passing a wire
                                                                  rope through (Fig 3).




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