Elastic yellow application sometimes encounter some difficulties, below for some single spring to do the following

1. Cylinder bounce yellow

Cylinder elastic yellow by high temperature and regular high alternate change force, precision nitrogen spring application of general time will cause damage and deformation, elasticity is weak, resulting in cylinder shut off not tight, engine displacement reduction, exhaust pipe exhaust pipe black smoke, difficult to start and other common failures. Therefore, the cylinder spring elasticity should be maintained regularly. You can pad a small piece of sheet iron between the old elastic yellow and the new elastic yellow, clamp on the vice to fill more pressure, see its reduction level. When the new spring is reduced to 2/3 of the original length, if the old spring is 3mm shorter than the new spring, it should be replaced. If there is no accessories, flat washers can be padded with 3mm above and below on the old elastic yellow to fill its insufficient elasticity. In general, the cylinder should be replaced after 2500~3000h application.

2. Diesel pump plunger pump elastic yellow

Diesel pump plunger pump elastic yellow will be damaged and deformed by the action of regular beauty alternating change force, so that its random length is reduced, the elasticity is weak. When the elasticity of precision compound spring is weakened, the return rate of piston pump is reduced. That. When the diesel engine is running at high speed, the repeated movement of the plunger pump cannot maintain a harmonious relationship with the high-speed rotation of the camshaft of the gasoline pump, thus reducing the lift of the plunger pump. The amount of oil supplied is relatively reduced, resulting in lower engine displacement. Therefore, when the plunger pump elastic yellow application 3600~4500h should be replaced immediately.

3. The output oil pump is yellow

After the elasticity of the single spring becomes weak. It will lead to serious internal leakage of high pressure oil, reduce the remaining working pressure in the hydraulic tubing, and the oil pump is not seated quickly, resulting in less and unstable oil supply, and the diesel engine is weak and "cruising" in the work. In addition, it will continue to make the injection pump begin to spray weak, the oil is not decisive, the drop situation will cause ignition evil, the engine overheating, the exhaust pipe exhaust pipe black smoke. Therefore, the elastic yellow of the precision special-shaped spring oil pump should be replaced after the application of 3600-4500h. If there is bending deformation, it should be replaced immediately.