Diesel fuel injection pump is an important component supply system, depending on the condition of their work directly affects the engine's power, economy and reliability. Proper maintenance is Paul
Pump work permit and an important prerequisite for extending its life. The author summarizes the use of proper maintenance of fuel pump should do the following "Ten to."
First, make good use of diesel and filtered off, the diesel fuel injection pump to ensure a high degree of access to clean.
In general, the diesel engine on diesel fuel filtration requirements than the gasoline demand for gasoline is much higher when using the brands of diesel fuel used to meet the requirements, but at least after
48h precipitation. Strengthen the maintenance of clean diesel filter, clean or replace the filter in a timely manner; under operating environmental conditions in a timely manner to clean the diesel tank, complete removal of the bottom of the tank
Of oil sludge and water, diesel fuel injection pump of any impurities are on the plunger, delivery valve couplings and transmission components cause severe corrosion or wear.
Second, we should always check the oil tanks of oil injection pump volume and quality compliance requirements.
Should be checked before each start diesel engine fuel injection pump in the amount and quality of the oil situation (by engine lubrication to the fuel pump excluded), to ensure sufficient oil quantity and quality
Well, if mixed with water or diesel oil because of twisted, causing light and the outlet valve plunger early wear parts, resulting in lack of engine power, difficulty in starting, causing serious
Plunger and the outlet valve parts rust corrosion. As the pump internal leakage, the valve working poor fuel pump tappet and shell wear, seal damage, will cause the diesel fuel leak into the oil pool and
Dilution of engine oil, so the quality should be based on timely replacement of engine oil, replace the oil tank when a thorough cleaning, the oil sludge and other impurities in the bottom of the pool cleaned, otherwise use
Long oil will not degenerate. The number can not be too much oil or too little, too much fuel inside the governor, easily lead to engine "speed", oil lubrication is too small it will give poor
Oil feet should be flat or oil screw prevail. Another long time when the engine when not in use, be sure to check the oil pump the oil to whether the pool of water, diesel oil and other impurities, if
Should be replaced immediately, or stored as a long time, water can easily make the plunger, delivery valve couplings corrosion card dead scrap.
Third, adjust the fuel to regular check-cylinder fuel supply advance angle and the angle interval.
In use, as joint bolts loose coupling, cam and roller wear body parts, often leads to supply advance angle and the angle of cylinder oil change intervals, so that diesel
Deterioration of the oil burning, diesel power, economy becomes worse, and difficulty in starting, running unstable, abnormal noise and overheating issue. In actual use, most drivers attention to the whole
Injection timing of the inspection body to adjust, but neglect the oil interval angle (involving single-pump injection timing adjustment) and check adjustment, resulting in an overall adjusted Although the first cylinder Injection Timing
, But the rest of the cylinder as camshaft, roller wear of transmission parts to oil and other reasons are not necessarily positive, the same result in difficult starting diesel engines, power shortage, uneven running
Stability, in particular the use of fuel injection pump for a long time, more attention should be paid to the oil inspection interval angle adjustment.
Fourth, we must periodically check the adjustment of each cylinder's oil supply fuel injection pump.
As the plunger and barrel assembly and the outlet valve wear parts, resulting in leakage of diesel fuel, each cylinder's fuel supply will reduce or uneven, resulting in difficulty in starting diesel engines, power shortage, fuel
Increase in operating instability. Therefore, regularly check and adjust the oil injection pump volume of each cylinder to ensure that diesel power play. In actual use, the engine exhaust can be observed
, Listen to the engine sound, touch and other methods to determine the temperature of the exhaust manifold of each cylinder the size of oil supply.
Fifth, we should regularly check the cam clearance.
The axial clearance of the injection pump camshaft is very strict, normally between 0.03 ~ 0.15mm, the gap is too large, will increase wheel drive components on the impact of the working surface of cam
, Thereby increasing the early wear of the cam surface, changing the fuel supply advance angle; camshaft bearing shaft diameter clearance is too large, could easily lead to unstable operation camshaft, fuel adjustment rod shake
Action, changes in fuel supply periodically to make diesel engine operation is unstable, and therefore regularly check and adjust. Camshaft axial clearance is too large, can be inserted into the gasket adjustment path
The gap is too large, the general to replace new.
6, to regularly screened out sealing valves of the situation.
Fuel pump work for a time by checking out the oil valve seals can wear and plunger pumps work to do a rough check, which will help determine repairs and
Maintenance. Check, unscrew the cylinder high-pressure pipe fittings, using hand pump oil pump oil pump, fuel pump at the top of the case and found the oil outflow pipe joints, it indicates that the oil
Bad valve seals (of course, such as a broken valve spring also occurred), such as the multi-cylinder seal undesirable phenomena occur, then the fuel pump should be thoroughly debugging and maintenance, replacement of even
Pieces.
Seventh, we should use the standard high-pressure pipeline.
Fuel injection pump in the fuel supply process, due to the compressibility of diesel, high pressure flexible tubing, high pressure diesel pressure in the tube formation of fluctuation, the pressure wave in the pipe transfer requires a
Set time interval to ensure the angle of the cylinder fuel supply line, fuel supply uniform, diesel and steady, high-pressure pipeline length and diameter are measured and selected through. So when a cylinder
High-pressure pipeline damage, application of standard length and diameter of the pipeline replacement. In actual use, due to the lack of standard tubing, tubing with other alternative, regardless of the length of tubing
, Are the same diameter, pipe length and diameter to vary greatly, and although the emergency use, but will cause the oil tank and the fuel supply advance angle changes, causing machine
Work is not stable, so in use must use the standard high-pressure pipeline.
8, related to periodic inspection and fixed the bolt keyway wear.
Related keyway and bolt mainly refers to the camshaft keyway, keyway flange coupling (with coupling transmits power pumps), Woodruff Key, and coupling fixed bolts. Pump
Camshaft keyway, keyway flange, Woodruff Key as long-term use, the light wear occurs, so that wider keyway, Woodruff Key installation is not strong, injection timing changes; weight are key sub-
Rolling, leading to failure of power transmission, it should be regularly inspected, and timely repair or replacement of worn parts.
9, to the timely replacement of worn piston and the outlet valve parts.
When they find difficulty in starting diesel engines, power decrease, increases fuel consumption by adjusting the fuel injection pump and injectors are still not improve should be dismantling the fuel pump plunger and the outlet valve parts
Such as the plunger and the valve wear to a certain extent, should be replaced, not to insist on re-use. Due to wear of diesel engine start after the difficulties arising from fuel consumption to increase, power shortage
Such losses far exceed the cost of replacement of couplings, replacement of diesel power and economy have improved remarkably, and therefore timely replacement of worn couplings.
10, to maintain the correct fuel pump attachment.
Pump side covers, oil foot, filling plug (respirator), spill valves, oil tank screw plug, oil flat screws, bolts and other fixed oil pump, to ensure that intact, these attachments on
Pump work plays a vital role. If the side covers to prevent dust, moisture and other impurities intrusion, respirators (with filters) can effectively prevent oil deterioration, oil spill valve
Ensure that the fuel system has a certain pressure and not into the air and so on. These attachments must be to strengthen maintenance and found damaged or lost to timely repair or replacement.