Repair ZIL-5301
Usually vibration on ZIL-5301 is felt most at a speed of 60-70 km/h
If vibration occurs when driving ZIL-5301:

The high-pressure fuel accumulator (Rail) is a volumetric fuel storage tank under high pressure
At the same time, the accumulator smooths out pressure fluctuations that occur due to the pulsating fuel supply from the high-pressure fuel pump,

Installation of high-pressure fuel pump, injectors, high-pressure and low-pressure pipes ZIL-5301
The high-pressure fuel pump mating plate must be clean; nicks and other damage to the plate are not allowed

Checking the tightening of the cylinder head mounting bolts
Check the tightening of the cylinder head mounting bolts after the break-in period and every 40 thousand km of run on a warmed-up diesel engine in the following order:

The signaling device is designed to warn the driver about damage to one of the circuits of the hydraulic drive brake system

ZIL-5301 Headlight Wiring Diagram
Many questions arise regarding the wiring diagram for the steering column switch to the headlights