46
4
Fuel system
Check the needle valve and lever for
wear.
Replace damaged parts with new ones.
Remove the pump diaphragm.
Check the diaphragm for wear.
Remove the fuel filter.
Unscrew both nozzle needles.
Check the needle valve for wear on the
point and in the groove for the lever.
Check the lever for wear on the groove for
the lever and on the contact point to the
metering diaphragm.
Replace damaged parts with new ones.
Remove the screw which holds the cover
over the pump diaphragm.
Lift off the cover, gasket and diaphragm.
Check the diaphragm for damage on the
valve tongues. Hold it up to a light to
check for holes in the material.
Carefully remove the fuel filter, e.g. by
using a needle.
Unscrew the nozzle needles.
NOTE!
Notice how the needles are placed (e.g.
the H-needle is slightly shorter than the L-
needle.
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