Page 100 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

• Place the diaphragm over the return spring.
• Align the mark of the accelerating pump unit and carburettor body. Assemble the pump unit on the carburettor
body with a new gasket.
• Tighten the pump cover screw.
• Connect the accelerating pump and the control rod adjusting unit.
• Fix the needle valve seat with a new fibre washer on the carburettor cover.
• While fixing the needle valve seat with a new washer note the thickness of the washer as it determines the
float level.
• Fix the built-in filter with the holder on the carburettor cover.
• Fix the main jet, check the number on the jet before fixing.
• Ensure that only the jet with the correct No. is fixed.
• Fix the main jet-holder with a new fibre washer in its position.
• To avoid damaging the threads tighten the first two to three threads by hand, then tighten by spanners.
• Fix the pilot jet.
• Fix the pilot air bleed in its position.
• To avoid damaging the thread tighten one or two threads by hand, then use a spanner.
• Fix the emulsion tube into its carrier.
• Fix the air correction jet. Check the number of the jet before fixing. Ensure only the jet with the correct number
is fixed.
• Fix the choke tube in its position inside the carburettor body.
• Align the marks on the choke tube and carburettor body surface.
• Fix the starter jet with a new fibre washer. Ensure the proper number of the jet before fixing.
• Fix the pump inlet valve with the filter and fibre washer in its position. Check the number of the valve, before
fixing. Ensure only the valve with the correct number is fixed.
• Fix the pump outlet valve with the fibre washer.
• Fix the pump spray nozzle with the packing.
• Fix the volume control screw with the spring, tighten it fully, then unscrew one and a half threads.
• Place the float inside the float chamber. Make sure that the word ‘Top’ written on the float faces upward.
• Assemble the toggle mechanism to the top cover with the needle valve in place.
• Check the float level.
• Pour 75 ml petrol into the float chamber. Check the free movement of the float and the toggle mechanism and
check for any leakage in the jet connection.
• Apply shellac on one side of the top cover gasket and place it on the carburettor top cover and align the screw
holes.
• Place the top cover on the carburettor body and align the mounting holes.
• Tighten the three mounting screws evenly.
• Remove the cardboard closing the inlet passage of the inlet manifold.
• Place the carburettor assembly over the inlet manifold/ flange with the gasket.
• Tighten the carburettor mounting nuts evenly.
• Connect the fuel pipeline to the float chamber. To avoid damage to the thread, tighten two or three threads by
hand, then use a spanner. To avoid damaging the pipe, hold the union in top cover with a spanner and tighten
the nut fixing the pipe trunnion with another spanner.
• Connect the starter cable. Ensure that the starter lever is fully in home position.
• Connect the accelerator linkages. Ensure the free movement of the accelerating pedal.
• Fix the air cleaner over the carburettor.
• Start the engine and adjust the idling speed.

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CITS : Automotive - Mechanic Diesel - Exercise 4.3