Excavator engine 'speed' analysis and solution

by:HMB     2021-01-22
Cause of excavator coasters: 1, the governor shell lubricants is overmuch, speed fast to jilt, which affect the control effect; Governor friction clutch slippage; Governor speed limit screw loose and security; Swift emergence or binding; Speed, thrust bearing, or broken springs governor bearing damage, make the governor failure, caused by speed. Monomer 2, single cylinder diesel engine fuel injection pump governor drive sliding sleeve gets stuck, cause failure of speed adjustment, speed problems. 3, fuel injection pump plunger matching parts for installation of skew or grease gets stuck, have to rotate, lose speed rack boat, multi-cylinder pump, in particular, there will be a load decreases, and oil cannot change caused by speed. 4, fuel injection pump fuel control gear in the largest oil supply position stuck or rack and governor tie rod off, out of control and speed. 5, some of the fuel injection pump plunger sleeve on the inlet and return oil hole in the same plane position, if the plunger sleeve positioning screw too long closed oil return hole, causing poor oil return, lead to a surge in oil can also cause coasters. 6, inertial oil bath type air filter oil inside the oil too much, get sucked into the combustion in cylinder, the equivalent of increased oil, also can make speed is accelerated, coasters. Diesel engine speed occurs, if not immediately stop operation, will cause serious consequences, so when happen coasters, must think of some way to make the diesel engine immediately stop stalling. Emergency measures: 1, push the throttle lever to oil supply position, open the pressure-relief devices, forcing the cylinder compression force, can be shut down. 2, using a wrench, loosen the high pressure hose connector nut make diesel engine oil supply, also can make the engine stalled. 3, blocking air inlet pipe, not into the air, diesel engine will be shut down. 4, in a state of driving high-grade heavy load are available, and that the brake, engine speed will be reduced, remove from heat.
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