O P E R A T I O N & M A I N T E N A N C E M A N U A L
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smoke exhaust. If there is any oil injector with faults, stop the oil injection and no smoke
will be discharged; rotation speed changes little or without any change. It is also
feasible to rotate the flywheel one by one to listen to the oil injection sound, when clear
sound is lost; it means the oil injector in this cylinder might have errors on it.
1. Adjustment of the oil injector
(1) Handle the pump to the gauge pressure close to the oil injection pressure,
and keep slowly pressing the handle pump to increase the surface pressure to
regulated oil injection pressure. Observe the oil injection hole, where should not have
oil drop or leakage. If after several times of test, there is still oil drop, dismantle the
injection nozzle parts to clean, check or grind before carrying out the test
.
(2) Adjust the oil injection pressure to regulated the pressure, and dismantle
the pressure adjusting nut, loosen or fasten this nut , make the oil injection pressure
accord to the regulated oil injection pressure, then fasten the nut and try again.
(3) Observe the spraying quality. Carry out pulverization test in the
once/second oil injection speed. The oil shall be even fog without any visible splashed
oil foam, partially uneven thickness or single side injection abnormal, etc .Clear sound
shall be occur when cutting off the fuel. In general , abnormal oil injection occurs
caused by the inflexible movement of injection nozzle needle valve. The drop of oil on
the injection hole usually occurs because of damage on the sealed surface, and the oil
separation from the carbon accumulation on the nozzle or hears deformation.
1. Dismantle and repair of oil injection
(1) When dismantle the oil injection, clean the external part to make the
nozzleface upward and clamp it to the table pliers with bronze pad. Screw down the nut
to take out the needle valve parts and pull out the needle valve to soak into clean diesel.
Turn the oil injector for 1800 and clamp. Take down the pressure adjusting nuts and
screw to take out pressure adjusting spring and top rod.
(2) If the needle valve parts are snapped or the pulverization is not good, clean it
right away. If the needle valve parts are snapped, soak them in diesel for some time,
and then clamp the needle valve with iron thread plier, and pull out lightly to avoid
napping. When cleaning the needle valve parts, scratch with wooden piece with
gasoline or diesel but metal piece is not allowed. When the needle valve and its parts
are not smooth or the movement is inflexible, grind adjustment can be carried out. Use
