2.7.7.25. Working capacity check aurally

Fig. 2.251. Check of nozzles by means of a stethoscope

By means of a stethoscope hear to clicks of work of nozzles idling (fig. 2.251).

Be convinced that frequency of repetition of clicks raises with growth of frequency of rotation of the crankshaft of the engine.

NOTE Listening make so that clicks were not transferred on a fuel stage to an idle nozzle from the next nozzle.

Fig. 2.252. Check of operability of a nozzle by a finger

In the absence of a stethoscope check work of nozzles, putting to them a finger (fig. 2.252).

If vibration thus is not felt, check the electric socket, a nozzle or receipt of an operating signal from the control unit the engine.