Excavator hydraulic oil blackening reasons: first, containing metal impurities; two, the working environment
is not good, the outside pollutants into the hydraulic oil.
Here's a look at the source of iron filings and how to prevent them:
1. most likely is the high speed rotary pump generated debris, and about all parts of the pump rotation, you have to take into account, such as bearings, volumetric chamber and other wear and tear;
2. hydraulic valve spool running back and forth, the oil cylinder running back and forth grinding debris, but this short time will not appear this phenomenon;
3. because of the new machine, the equipment running will produce large amounts of iron, when I do not know you whether the oil hydraulic oil tank in all empty, and with new oil circulation system, the tank with cotton cloth to wipe clean and then add new oil, if not, there may be a large number of iron residue in the tank that will lead to new oil polluted black;
Look at the environmental impact:
You should check whether your hydraulic system is closed and the breathing hole is intact; Check the
hydraulic parts of the equipment to see whether the seal is in good condition, such as the anti-dust
ring of the cylinder.
1. When changing hydraulic oil, it is not clean;
2. Oil seal ageing;
3. Poor working environment of the excavator caused the filter core to block;
4. There is a lot of air bubbles in the air pressure pump.
5. The hydraulic oil tank is connected with the air, the dust in the air, the impurities use the time
to go into the tank, the oil is sure to be dirty;
6. The particle size test of oil is consistent with cleanliness requirements. Dust pollution can be excluded.
Be sure to say hydraulic oil temperature is higher cause! Can replace with high quality hydraulic oil,
check back oil filter element, radiator oil, the key is the hydraulic oil radiator! Peacetime should be
maintained according to the regulation!
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The reasons for the blackening of the hammer hydraulic oil:
It is not only the dust caused by the broken hammer that causes the black oil of the excavator hydraulic system,
but also due to the unspecification of the butter filler.
For example: when the spacing between the bushing and the steel is more than 8 mm (the thumb can be inserted),
it is recommended to replace the liner with a replacement for each of the two jackets. When the broken hammer
is changing the oil pipe, steel pipe, and the oil filter core and other hydraulic accessories, it is necessary
to clean up the dust or debris in the contact area before releasing the replacement.
When adding butter, you need to lift the broken hammer to the piston, with only half a shot of the standard
butter gun. (because if no compression steel when loaded with butter, butter of the filling and now will be
in the steel cap, steel work butter will directly up to the hammer of the main oil seal, as the piston
reciprocating motion the butter into the hammer in the cylinder, and with the hammer in the cylinder
of the hydraulic oil mixed with to the excavator's hydraulic system, hydraulic oil is bad, black)
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Processing methods:
Use butter correctly.
2. Add back oil filter device.
3. Add water spraying device to reduce dust.
4. The upper and lower lining wear is too worn, replace the bushing in time.
5. The inlet valve is bad or blocked and check the one-way valve regularly.
6. Replace dust seals in time.
7. Use broken hammer correctly (don't always beat)