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Thursday, March 24, 2011

VIEWING PROCEDURE OF PISTON ASSEMBLY


                                 VIEWING PROCEDURE OF PISTON ASSEMBLY

AIM:
        To carry out inpection on the piston assembly.


TOOLS REQUIRED:
                                   Cleaning basket
                                   Feeler gauge
                                   Scale 12”
                                   Telescopic gauge
                                    Micrometer
                                   Vernier caliper


PROCEDURE:

CLEANING:
·         Check for completeness of the piston assembly and clean it by dipping in
 petroleum solvent using cleaning basket.
·         Examine the piston surface thoroughly for excessive pitting, cavaties or
surface distortion.
·         Check the piston rings, grooves, piston pinholes and holes base for
any damage.
·         Check side clearance between piston rings and piston (0.004”-0.0025”).
·         Check end clearance on wedge type piston rings.
·         Check inside diameter of piston pinhole (0.03”-0.004”).
·         Check clearance between piston skit and cylinder and piston dia top
and bottom(0.021”).
·         Check outside diameter of piston pin against inside diameter of
hole in piston(0.0002”-0.001”).
·         Measure fit between piston and plug and check outside diameter
of plugs(0.0002”-0.001”).
·         Examine two interior surface of piston pin hole for corrosion and fitting.




RESULT:
                 The maintenance and inspection of the piston assembly has been performed according to manufacturers maintenance manual.

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