Unlock and disconnect the loops from the injectors of the fuel injection system. Loosen the screws of the clamps and remove the branch of the wiring harness of the injectors.
push in (move) fixing bracket (1, fig. 6.124) in the direction of the left arrow. Disconnect piping fittings (2) for back draining of fuel from all injectors upwards. If the O-ring is damaged, the entire fuel return line for that cylinder group must be replaced.
Disconnect the pipeline (arrow, fig. 6.125) groups of cylinders from a tee (T-piece) common return pipeline of the power system.
Attention! To avoid deformation of the pressure pipes, check the setting of the tool «13.5.020».
Strictly observe the tightening torques of the union nuts of the pipelines. Check for O-rings on the injectors.
Reassemble the engine and check the injection system for leaks.