Points to Pay Attention to When Installing and Repairing The Valve of The Generator Set

Points to Pay Attention to When Installing and Repairing The Valve of The Generator Set

After the new guide tube of the generator set is installed in the cylinder head, use a reamer to correct the circularity and inner hole size of the guide tube, so that the gap between the valve stem and the guide tube hole conforms to the requirements of the generator set manual, and the finished valve stem cannot be processed. In use, the gap between the valve stem and the guide hole should not exceed the wear limit specified in the unit manual. Generally, as long as the gap between the valve stem and the guide tube reaches 0.13 mm (for valves with a rod diameter equal to or less than φ8 mm) or 0.16 mm (for rod diameters) Valves larger than φ8mm) need to be replaced with valves or guides, otherwise the valves will be damaged early.

The valves of different types of generator sets of the same series may be different, so do not mix them. The deformed or burnt valve seat must be reamed and corrected, and cannot be repaired only by grinding with the valve. For the valve seat that cannot be repaired, new parts should be replaced, and the repaired or newly replaced seat ring should be the same as the guide hole. Shaft, the coaxiality tolerance is 0.03 mm, the valve is installed in the valve seat ring, and the sinking amount of the valve and the cylinder head should meet the requirements specified in the unit manual.

The valve and valve seat are gently ground to ensure valve sealing. Coarse abrasives should not be used during grinding. The contact part between the valve seat and the valve cone surface should be in the middle and lower part of the valve cone surface. The valve and seat ring must be sealed. This results in a drop in the power of the generator set and early damage to the valve. After grinding, the abrasive should be cleaned with kerosene, and the valve stems and guides should be lubricated with clean oil.