Technical data

52
1 – adjusting screw; 2 – lock nut.
Fig. 30 – Adjusting the fuel injector.
3.3.21. Checking and Adjusting the Diesel Engine Run Stability in Partial
Idling Modes
Check and adjust the stability of the engine run in partial idling modes on completion of
the running in and, if necessary, during the operation. In case of instable run of the engine within
the rotational speed range of 800...1,200 rpm that would be accompanied by acute interrupted
sound, adjust the idling spring of the fuel pump in the following order:
- determine the maximum rotational speed of idling by means of the tachometer of the
tractor (machine);
- run the diesel engine in the idling mode, in which it will run unstably;
- unscrew the lock nut of the idling spring bolt 9 located in the housing of the fuel pump
governor, as shown in Fig. 26, and screw smoothly the bolt into the housing until the rotational
speed stops fluctuate (by ear or by means of tachometer of the tractor) and lock the bolt by means
of the locking nut;
- check the maximum rotational speed of idling.
In case of proper adjustment the maximum rotational speed of idling shall not increase by
more than 20...40 rpm.