Page 45 - CTS - Mechanic Diesel - TP
P. 45

MECHANIC DIESEL - CITS



           EXERCISE 2.9: Practice on removing rocker arm assembly

                                     and manifolds


            Objectives

           At the end of this exercise you shall be able to
           •  remove the rocker arm assembly from the cylinder head
           •  remove the manifolds from the cylinder head.

           Requirements


           Tools/Instruments                                   Materials/Components
           •  Trainee’s tool kit            - 1 No.            •  Tray                            - 1 No.
           •  Box Spanner set               - 1 No.            •  Cotton waste                    - as reqd.
           •  Wire brush, scrapper          - 1 No.            •  Soap oil                        - as reqd.
                                                               •  Lube oil                        - as reqd.
           Equipments/Machines
                                                               •  Gasket                          - as reqd.
           •  Multi cylinder diesel engine     - 1 No.

           Procedure


           TASK 1: Removing rocker arm assembly
           •   Remove the head cover (value door)
           •   Remove the mounting nuts of the rocker shaft supports.
           •   Takeout the rocker shaft along with supports in the horizontal position.

           •   Ensure that the shaft does not tilt to avoid bending and breakage of the shaft.
           •   Place the rocker arm assembly on the work bench in tray
           •   Clean the rocker arm assembly with specified cleaning solvent. (avoid to prevent damage the valves and
              rocker arms during removing and cleaning the rocker arm assembly)

           TASK 2: Removing the inlet and exhaust manifold from the cylinder head (Fig 1)

           •   Remove the exhaust manifold flange nuts and bolts.  Fig 1
           •   Disconnect the exhaust pipe line from exhaust manifold.
           •   Loosen the exhaust manifold mounting bolts.
           •   Remove  the  turbo  charger  before  loosen  the  exhaust
              manifold mountings.
           •   Remove the manifold mountings and take out from the
              cylinder head and place it on the work bench.
           •   Remove the air cleaner or air intake hose from the inlet
              manifold
           •   Loosen mounting bolts of inlet manifold.
           •   Remove the inlet manifold mounting bolts and take out
              from the cylinder head and place it on the work bench.

           •   Ensure the manifold are safety placed on the work bench.
           •   Visually inspect the manifolds for any damages on the manifold.
           •   If any damages found make repair and clean it thoroughly.



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