How to avoid black smoke on flatbed trucks
Low plate transporter black smoke exclusion method: If the cylinder compression pressure measurement to confirm that the engine black smoke is caused by the cylinder compression pressure is low, you must check the piston clearance, valve seat recess depth and valve and valve seat ring The seal between the situation. There are three ways to do this: 1) Loosen the cylinder head bolts, remove the cylinder head, put the lead wire on the top of the piston, and then put on the cylinder head, tighten the cylinder head bolt as required, and then loosen the cylinder head bolt, remove The thickness of the lead wire was measured after the cylinder head.
The second step is to carefully observe and measure the distance between the valve head plane and the bottom surface of the cylinder head after taking out the cylinder head. If the measured value is greater than the technical requirements, it means that the valve seat ring is too concave and needs to be repaired. The repair method is: replace the valve seat and all valves, and re-grind the valve. Specific requirements for valve seats refer to relevant technical requirements. 3) If the recess depth of the valve seat ring of the pallet transporter is acceptable, the sealing tape between the valve and the valve seat should be carefully checked. Under normal circumstances, after long-term use, the seal band between the valve and the valve seat ring will have a large amount of wear and deformation, and it needs to be repaired. The specific approach is to: Grind the valve seat seal band, replace the valve and re-learn the valve.
The valve clearance is not correct, that is, the valve does not open when it is opened, and it does not close when it is closed, which directly affects the intake air volume of the engine, causing the exhaust pipe to emit black smoke, and the valve clearance is incorrect. In addition to causing the engine to emit black smoke, it will also Difficult to start, lack of power, strong metal collision sound and other phenomena, to confirm the low plate transporter valve clearance is the basic method is: open the valve cover, hand or feeler check valve clearance. Remedy: Adjust the valve clearance by professional service personnel as required.
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