4.7. Check and adjustment of frequency of rotation of a bent shaft of the engine idling

As diesel engines have no system of ignition, the special tachometer is necessary. But its acquisition is not repaid as it is quite expensive. Warm up the engine up to the working temperature, temperature of cooling liquid has to be not less than +80 °C.
Disconnect everything consumers of the electric power (the radio receiver, lighting). During the operation of the engine idling turn on the parking brake.
Measure the frequency of rotation of a bent shaft of the engine idling which has to be:
– (825±25) min.-1 for the RF engine;
– (725+25) mines-1 for the RF-N engine.

Fig. 4.24. Arrangement of a lock-nut and screw of adjustment of frequency of rotation of a bent shaft of the engine idling RF-N


If the frequency of rotation of a bent shaft of the engine idling does not correspond to demanded, weaken a lock-nut and, rotating the adjusting screw, adjust the frequency of rotation (fig. 4.24). After adjustment tighten a lock-nut.

PREVENTION
If the frequency of rotation of a bent shaft of the engine idling does not manage to be adjusted, address on Mazda or Bosch service station.