The CD3 carburettor has a fixed jet, and
the needle is loosely mounted in the air valve, or piston, so that it centres
itself.
You need a special tool to reset the mixture, which is done by altering the height of the needle in the piston. The tool is a long L-shaped hexagonal Allen key which goes inside a thick-walled tube. Its maker’s part number is B20379.tcm auto oil seals SOLD IN THE COUNTRY.
To use the tool, remove the dashpot damper and insert the tube in its place. Turn the tube until a pin on its side falls into a slot in the air-valve shaft.
auto oil seals Insert the thick-walled tube of the special tool into the dashpot. Hold it firmly while you make the adjustment using the Allen key. For larger adjustments, lift out the piston and spring. Use and Allen key to set the needle in a midway position.
Insert the thick-walled tube of the special tool into the dashpot.Hold it firmly while you make the adjustment using the Allen key.For larger adjustments, lift out the piston and spring.
Use and Allen key to set the needle in a midway position.auto oil seals.
Push the Allen key to the bottom of the shaft and fit it into the needle adjustment.
Before you turn the Allen key, hold the outer tube of the tool firmly; otherwise the air valve can turn and tear the rubber diaphragm.une the carburettor with the engine running at working temperature, in the same way as with the CD and CDS.For this carburettor, turn the Allen key clockwise to lift the needle and thereby enrich the mixture and anticlockwise to lower the needle for a weaker mixture.tcm auto oil seals SOLD IN THE COUNTRY.
take care not to turn the adjustment too far, or the needle can come loose from the adjuster. The range is only about two full turns.If you find you have to make more than a tiny adjustment, avoid losing the needle. Take off the cover of the carburettor and lift out the air valve, holding it by its shaft so as not to damage the diaphragm. Then set the needle in a midway position with the Allen key.
The right position is when depending on the needle fitted – the washer around the needle or the groove in it is flush with the bottom face of the air valve.Reassemble the carburettor and adjust the needle – starting from this point – no more than one turn either way.After each adjustment is made, run the engine at about 2,000 rpm for ten seconds or so to clear the extra fuel which tends to get into the inlet manifold when you are making an adjustment.If you do not have a revolution counter or tachometer, listen to the engine note. Its pitch should rise a little more than an octave above its normal sound when idling.tcm auto oil seals SOLD IN THE COUNTRY.
You need a special tool to reset the mixture, which is done by altering the height of the needle in the piston. The tool is a long L-shaped hexagonal Allen key which goes inside a thick-walled tube. Its maker’s part number is B20379.tcm auto oil seals SOLD IN THE COUNTRY.
To use the tool, remove the dashpot damper and insert the tube in its place. Turn the tube until a pin on its side falls into a slot in the air-valve shaft.
auto oil seals Insert the thick-walled tube of the special tool into the dashpot. Hold it firmly while you make the adjustment using the Allen key. For larger adjustments, lift out the piston and spring. Use and Allen key to set the needle in a midway position.
Insert the thick-walled tube of the special tool into the dashpot.Hold it firmly while you make the adjustment using the Allen key.For larger adjustments, lift out the piston and spring.
Use and Allen key to set the needle in a midway position.auto oil seals.
Push the Allen key to the bottom of the shaft and fit it into the needle adjustment.
Before you turn the Allen key, hold the outer tube of the tool firmly; otherwise the air valve can turn and tear the rubber diaphragm.une the carburettor with the engine running at working temperature, in the same way as with the CD and CDS.For this carburettor, turn the Allen key clockwise to lift the needle and thereby enrich the mixture and anticlockwise to lower the needle for a weaker mixture.tcm auto oil seals SOLD IN THE COUNTRY.
take care not to turn the adjustment too far, or the needle can come loose from the adjuster. The range is only about two full turns.If you find you have to make more than a tiny adjustment, avoid losing the needle. Take off the cover of the carburettor and lift out the air valve, holding it by its shaft so as not to damage the diaphragm. Then set the needle in a midway position with the Allen key.
The right position is when depending on the needle fitted – the washer around the needle or the groove in it is flush with the bottom face of the air valve.Reassemble the carburettor and adjust the needle – starting from this point – no more than one turn either way.After each adjustment is made, run the engine at about 2,000 rpm for ten seconds or so to clear the extra fuel which tends to get into the inlet manifold when you are making an adjustment.If you do not have a revolution counter or tachometer, listen to the engine note. Its pitch should rise a little more than an octave above its normal sound when idling.tcm auto oil seals SOLD IN THE COUNTRY.
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