8/3/2023 0 Comments 24v cummins high idle![]() If the spring has been replaced, check whether the spring is too hard. If it is the fuel injection pump shortly after inspection and commissioning, it should be considered whether the idle speed adjustment is correct, and the idle speed spring preload force adjustment is too large. Adjust the throttle wire limit screw, if the throttle still cannot return, and then check that the throttle return spring is too soft. First of all, check whether the throttle is back to the minimum position, if not, check the throttle adjustment and throttle return position. ![]() The idle spring is too hard or the preload is too large.Įxcessive idle speed is one of the easiest faults to check and troubleshoot. The idle limit block or adjustment screw is out of adjustment.ĭ. The throttle return spring is too soft.Ĭ. The throttle lever is not properly adjusted.ī. The idle speed of the engine is too high, which shows that the engine speed is still higher than the specified value of idle speed when the throttle is lifted.Ī. If the spring is broken, it should be replaced and then adjusted to restore the idle working performance. The idle spring adjusting nut can be slightly screwed inward or a washer is placed on the spring seat to increase the preload and increase the idle speed. If the adjustment is invalid, adjust the pre-tension force of the idle spring. When checking the governor, first adjust it with the idle screw. The fuel injection pump assembly must be removed and the maintenance adjustments must be repeated on the test bench.ĭ. ![]() Check if the governor spring is broken or the governor is too worn or the spring is too soft, so that the centrifugal force of the flying hammer during idle operation is much greater than that of the spring tension and reduce oil, or the maintenance personnel do not adjust properly. ![]() If the above conditions are normal, the idle working element of the governor should be considered for abnormality. As long as according to the insufficient power treatment, the idle condition will naturally recover.Ĭ. It is generally the plunger wears too much, and the oil leakage increases at idle speed, so that the oil supply cannot meet the idle speed requirement or the cylinder pressure is too low, the fuel injection advance angle is too large, too small, resulting in poor engine combustion conditions. If the engine has been used for a long time, there is no idling condition, and the fuel consumption is not normal due to insufficient power. In this case, the throttle can be adjusted to run at a slightly higher idle speed, and then resume idle operation after the engine heats up.ī. This is because the temperature is too low, the viscosity of the oil is too large, the internal resistance of the engine is increased, the spray and evaporation conditions of diesel oil become worse, resulting in the engine can not maintain the minimum stable speed operation, when the throttle is raised, it will turn off quickly. There is no idle speed at cold start, which is generally a normal phenomenon. The plunger of the fuel injection pump is seriously worn.Ī. The governor sensing element is worn too much.Ĭ. The governor idle spring is too soft or broken.ī. When the throttle is slightly enlarged, the speed is increased quickly and cannot be stably operated at a low speed.Ī. Generally, the throttle is turned off when it is placed at the idle position.
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