Oil, start pounding
Loader engine startup, low body temperature, oil viscosity, fluidity, and within a short time the oil cannot flow to the lubrication points. Pounding the throttle at this time, can lead to transient increase of engine speed, oil pump and pressure will also increase the amount of oil, but the moment cannot meet the requirements of each pair of lubricants and hydraulic, motion cannot establish a good lubricant film, instant dry, causing severe wear and tear. The joint lubrication, run resistance will also increase if pounding the throttle piston, connecting rod and crankshaft will have a dramatic impact, accelerating mechanical damage. In addition, equipped with a turbocharged diesel engine, extremely easy to damage due to poor lubrication oil seals, causes turbocharger failure, reduced engine power. Therefore, the loader starts, smooth low-speed (about 500~700 r/min) operation, detonation gas is prohibited.
Second, start not heating machine
Because of its low body temperature, oil viscosity, oil pump fuel starvation, leading to motion for a short time are not good lubrication and wear. Big load, even cylinder holding w and other accidents will happen. In winter, the hydraulic hoses brittleness, direct job easy apart, will make the massive leak of hydraulic oil. Therefore, the loader starts, idling to heat up, and commissioning bodies, oil temperature and oil pressure reaches normal, before they can work.
Third, jobs, water
Insufficient cooling will lead to water shortage for diesel engine from overheating. Diesel direct supplementary cooling water under high temperature, temperature difference between the moment of the entire cooling system will have a great, moments such as cylinder head, cylinder liner, cylinder cracking, crack, gradually cooling water leakage, resulting in oil spills, leakage. Therefore, when the engine temperature is too high, should be based on a high speed no-load operation, when water temperatures drop to 50 ℃, flame, heat cover screw loose, exhaust steam, by injecting cooling water.
Four, long idle
Special field operations during the winter, the cold weather and difficult to start, many drivers are accustomed to loader does not work let it idle for a long time. Long time idle oil pump will pump the oil shortage, low oil pressure, the motion needs lubrication oil and fuel pressure not to require, friction increases wear, especially piston, cylinder liner wear, blowby caused; sometimes lead to valve and piston ring sticking. In addition, the poor idling diesel spray for a long time, incomplete combustion can cause delay extension of Coke seriously, roughness. Therefore, loader long idle, idle time is generally about 10 min.
Five, the difficulty in starting the fire warm
Loader not started, some drivers use an open flame under air intake or air inlet manifold with a air pump pipe interface, start the engine, forcing combustion diesel engine. This practice will not only make the air cleaner burning, and can lead to ignition timing, engine ahead or lag conflagration, roughness, cylinder liners, Pistons, connecting rods and other mechanical parts subject to severe impact force, damaged parts. Therefore, starting difficulty igniting the car is strictly prohibited.