19
Pressure-testing the injectors
37. Check the spray pattern at an opening pressure
of 180 kp/cm
2
(2560 Ibf/in
2
). Also check that the
fuel jets cease simultaneously at all four holes
and there is no dripping afterwards.
Adjusting the opening pressure
38. Adjust the opening pressure with adjuster
washers 1, which are available in different
thicknesses ranging from 1 mm (0.04”) to 1.95
mm (0.08”) at intervals of 0.05 mm (0.002”)
between each washer.
Screw apart the injector and replace the adjuster
washer with a thinner or thicker one depending
on whether the pressure has to be reduced or in-
creased. Screw the injector together again and
check the opening pressure and spray pattern.
Continue this procedure until results are satisfac-
tory.
Overhauling the feed pump
39. Exert force on the pump lever (see Fig.). If the
pump “squeaks” then it is in good condition. If it
does not, the diaphragm must be replaced. This
is done as follows:
40. Release the cover centre screw, lift out the strai-
ner 1 and clean it.
