How to Solve the Problems of Caterpillar 320C Engine Vibration and Combustion Noise
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1. The engine vibrates violently The possible causes and solutions are as follows.
(1) The nut fixing the pulley is loose. Tighten the nuts.
(2) The pulley is damaged. Install a new pulley.
(3) Engine mounts are loose, worn or damaged. Tighten all mounting bolts. Install new parts if necessary.
(4) The engine misfires or the engine does not run smoothly. Refer to the “Engine Misfiring or Rough Engine Running” section.
(5) The fan blades are unbalanced. Loosen or remove the fan drive belt. Vibration occurs at a certain RPM, run the engine at this RPM for a short time, if no vibration occurs, replace the fan assembly.
2. Engine combustion noise is loud The possible causes and solutions are as follows.
(1) Fuel quality is poor. Drain the fuel from the fuel tank and install a new fuel filter element. Fill the fuel tank with high-quality fuel.
(2) The fuel injector is faulty. Install new fuel injectors.
(3) The fuel injection timing is incorrect. Adjust fuel injection timing.
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