Diesel Fuel Injector 326-4756 for Caterpillar 312D Excavator Engine Cat Caterpillar C4.2 Common Rail Injector

When removing the fuel injector from the engine, sometimes the fuel injector sticks to the hole of the cylinder head mounting seat and cannot be removed. This is due to the carbon deposit in the combustion chamber sticking to the fuel injector. At this time, it is not possible to forcefully remove it. , so as not to damage the machine parts. It can be disassembled as follows. (1) When the carbon deposit is slightly bonded, after removing the pressure plate of the high-pressure oil pipe and the oil return pipe, gently tap the upper part of the injector with a small hammer front, back, left, and right, and use a fixed wrench or an adjustable wrench to insert the injector For the protective cap of the oil injector, turn it clockwise first, then turn it counterclockwise. After turning it clockwise and counterclockwise several times, use a medium or large screwdriver (screwdriver) to pry the shoulder of the injector body, and the its removed.
(2) When the carbon deposition is serious, remove the oil circuit and accessories, drop kerosene into the hole of the injector mounting seat, or spray a small amount of bolt loosening agent, and use a solid wooden stick along the diameter after a period of time Tap the injector left and right in the tangential direction of the circle to rotate the injector, then move it left and right to loosen the injector, use a screwdriver (screwdriver) to hold the shoulder of the injector body (at the oil inlet), The injector is pulled out gradually.