Insufficient fuel supply
1 no signs of engine load operation, if the throttle, speed can only be increased slowly; load, the engine was weak, and it is easy to flameout, but no smoke exhaust; in overload operation, flameout and have black smoke.
2 reasons
1) Baotou North heavy truck parts pump cover oil pump control valve is dirty or worn out, resulting in closed lax.
2) improper adjustment of fuel injection pump.
3 when the governor is too low speed or failure.
4) diesel filter plug or oil pipeline leakage.
5) diesel grade does not meet the requirements.
3 treatment methods:
1) check Baotou North heavy truck parts control valve, according to the specific situation of repair or replacement. And to the conditional repair plant to adjust the governor.
2) adjust the fuel injection pump.
3) adjust the length of the stop oil rocker arm.
4) clean diesel filter, seal oil pipeline.
5) according to the season to choose the right brand of diesel oil, and the precipitation treatment.
Improper adjustment of fuel supply advance angle
1 signs
1) when the engine is running at low speed, the engine is working violently, and there is obvious knocking on the cylinder. When the throttle is increased, the speed of the engine can be increased rapidly, and the sound of knocking the cylinder is more obvious, but the temperature of the cooling water is higher.
2) when the engine is running, the exhaust pipe is black and the cooling water temperature is high. The engine engine overheating, sometimes put guns, increase the throttle, speed slow.
2 reasons
Too early or too late.
3 processing method to adjust the fuel supply advance angle or replacement, repair serious wear adjustment pad, roller body, camshaft parts and so on.
Insufficient gas supply
When the 1 signs of the engine no-load operation, serious black smoke, the voice of the stuffy, power down, especially when accelerating, loosen the air filter and air inlet pipe connection, the phenomenon of black smoke significantly reduced.
2 reasons
1) air filter is dirty blockage, air intake into the cylinder is seriously insufficient, the gas can not be completely burned.
2) the exhaust pipe is carbon deposition.
3) turbocharger speed down.
3 treatment methods:
(1) regular cleaning North heavy truck parts air filter.
2) regular removal of carbon emissions from the exhaust pipe, in a timely manner to eliminate the engine combustion failure.
3) maintain the turbocharger on time, check the turbine and sealing device.
Improper valve clearance adjustment
1 signs of no load operation engine, exhaust pipe intermittent black smoke, gas distribution mechanism has a slight “Da Da” percussion sound
2 the reason the valve clearance is too large, so that the intake valve, exhaust valve opening and closing early, the total opening time of the valve is shortened, the exhaust gas exhaust, air intake, engine power, exhaust pipe black smoke.
3 treatment methods according to the provisions of the valve clearance adjustment, after the regular check valve clearance adjustment.
Machine temperature is too high or too low
1 signs engine water temperature is too high or too low, insufficient power.
2 reasons
1 high water temperature is usually due to a long time overload operation, cooling system scale is serious, the oil supply is too large or the oil supply time is too late.
2 water temperature is too low in winter to start soon.
3 treatment methods
1) to avoid the locomotive for a long time overload operation, remove the cooling system scale, reduce fuel supply, adjust the fuel supply time.
2 after the winter car start, should wait for the water temperature to rise to 40 degrees Celsius and then start, normal working temperature should be maintained at 75 ~90.
Related parts wear caused by leakage
The 1 signs of an intake pipe and an exhaust pipe leakage sound; cylinder pad (edge) around the bubbles occur; a gas outlet gas channeling is serious, blue smoke, oil sump oil consumption abnormal.
2 cause the valve and valve seat are closed tightly; cylinder head screws are not tightened according to the standard torque.
3 treatment methods
1) cleaning, scraping, grinding valve and valve seat.
2) Baotou beiben heavy truck parts of the cylinder cover and the cylinder body with uneven surface or warp, should be scraping or grinding, ensure that the cylinder sleeve is arranged protruding within the scope of the provisions, in accordance with the provisions of the order and tighten the cylinder head nut.
3 cylinder liner and piston parts of the wear is not serious, the piston ring can be replaced, while the cylinder sleeve to rotate 90 degrees to install, if the gap is more than the specified value, it should be boring cylinder, the replacement of the larger size of the piston.
Moving parts loose or stuck
1 signs of engine black smoke; parking, engine cranking, feel great resistance.
2 reasons
1) adjust the adjusting arm of the piston, loosen the adjusting fork on the oil supply rod
2 plunger and roller body stuck, the spring spring is too weak or broken.
3 treatment methods
1) fastening related parts
2) repair worn rolling bodies
3) replace the standard size and elasticity of the plunger