Page 99 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

• Remove the pump jet (outlet valve).
• Remove the pump inlet valve.
• Remove the pump spray nozzle.
• Remove the air correction jet. Note down the jet number.
• Remove the emulsion tube.
• Remove the pilot air bleed.
• Remove the venturi tube lock screw.
• Mark the venturi tube projection on the carburettor body.
• Remove the venturi tube.
• Remove the volume control screw with the spring.
• Mark the position of the pump assembly with the carbu-rettor body to fit this in the same position while
re- assembling.
• Remove the pump control rod with the spring.
• Remove the pump cover screws and the pump assembly from the carburettor.
• Remove the pump cover.
• Remove the pump chamber.
• Remove the diaphragm return spring.
• Remove the pump diaphragm.
• Remove the starter lever and starter body.
• Remove the starter disc.
• Remove the starter air jet.
• Cleaning and inspection
• Clean all the parts with kerosene.
• Clean all the jets and passages with compressed air.
• Clear the dirt from the blocked jets and passages by a copper wire. (Do not use a steel wire as this will
increase the diameter of the jet.)
• Check the free movement of the float needle valve. should fall freely by its own weight. Clean it, if it does not
move freely.
• Check the float for puncture and damage.
• This is taken care of by manufacturers.
• Check the pump diaphragm for puncture and damage.
• Check the pump diaphragm spring for tension.
• Check the pump chamber mounting thread for wear and damage.
• Check the tension of the volume control spring.
• Check the built-in filter for damage.
• Check the toggle mechanism for damage.
• Check the toggle mechanism for free movement.
• Note down the sizes of the various jets in a note book.
• Assembling
• Place the disc on the choke body.
• Tighten the mounting screw of the starter body.
• Place the starter lever and hold it against the spring force.
• Tighten the starter spindle end nut.
• Place the pump diaphragm return spring in its seat on the pump chamber.

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CITS : Automotive - Mechanic Diesel - Exercise 4.3