Engine heat is one of the common faults of engineering machinery, engine high-temperature many reasons, but when carefully screening is not difficult to find out why, here to remind everybody to pay attention to the high temperature of excavator display hints, and promptly stop check, otherwise may cause valve burning-out, phenomenon of cylinder piston viscosity and cause serious mechanical failure, brings to the main heavy losses.
Cause there are a lot of: the cause of the high temperature cooling system failure caused by high temperature engine;
The shutter opening;
Insufficient cooling water;
Relaxation of fan belt or skid and pulley wear;
The thermostat circulation bad work;
Cylinder block water jacket scale too much;
The radiator pipe blockage between core or heat sink.
Fan clutch failure, fan blade deformation, improper Angle;
Loose water pump impeller, the impeller and the pump shell gap is too large loss of pumping function;
Heavily damaged fuel injector, fuel injection spray combustion is poor, inadequate;
Turbocharger wear lead to inadequate intake, fuel burning incomplete;
Valve clearance is too small lead to valve closed lax, leakage cause engine powerless, high temperature;
Between the valve and seat wear lead to valve closed lax, leakage cause engine powerless, high temperature;
Between valve seat and valve closed lax, caused by too much fire growth caused by high temperature, piston top.