Pressure of injection is adjustable parameter. During operation of the engine injection pressure often falls therefore the nozzle needs to be checked periodically and, if necessary, to regulate.

Carry out check of serviceability of a fuel nozzle in the following order:

be convinced that the engine is serviceable and the level of a compression is identical in all cylinders;

start the engine and warm up it up to the working temperature;

weaken a nut of fastening of the union of a fuel-supply line on the checked nozzle, at the same time note whether engine turns changed. Make the same check on accelerated single to the course;

at a serviceable nozzle the obvious reduction of turns of the engine which is followed by its uneven work will be observed. If the checked nozzle is faulty, change of turns of the engine will be insignificant and will be gone if was present earlier, foreign knock.

Removal of a fuel nozzle

Carry out in the following order:

disconnect a wire from a negative conclusion of the rechargeable battery;

PREVENTION Protect the generator from hit in it diesel fuel

carefully clear fuel nozzles of pollution and remove a returnable fuel pipe from a nozzle;

unscrew fuel supply pipelines from fuel nozzles;

unscrew a fuel nozzle and establish a protective cap on a spray;

Fig. 5.81. Fuel pump of high pressure: 1 – pulley; 2 – segment spline; 3 – fuel pump of high pressure; 4 – stopper; 5 – fuel-supply lines; 6 – heat-shielding washer; 7 – nozzle case; 8 – needle; 9 – adjusting washer; 10 – spring; 11 – valve; 12 – engine stop mechanism

take washers 6 (see fig. 5.81 ) thermal isolation and wipe them.

Installation of a fuel nozzle

Carry out in the following order:

Fig. 5.85. The direction of installation in the engine of a washer of thermal isolation

establish new washers 6 ( fig. 5.85 .) thermal isolation by the convex party to a head of the block of cylinders;

screw in a fuel nozzle in an opening in a head of the block of cylinders and tighten it the required moment;

screw the fuel supply pipeline on a nozzle;

connect a pipe of return of fuel to a fuel nozzle;

connect a weight wire to the accumulator and check operation of the engine.