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MA45W/GS4 series of swing reducer is composed of swash plate operated piston motor and secondary planetary reducer. The motor covers safety relief valve, oil compensating valve, anti-reversing valve and internal mechanic parking brake. With security and good performance, it is mainly used in swing driving device of 8-10 hydraulic excavators.


Speed ratio20
Output torque4kN·m

Auxiliary return structure with cone cylinder pressing plate is adopted, which is featured with compact structure, high power-weight ratio and strong anti-pollution ability etc. The integrated design of the control valve realized the control function such as constant power, pressure cut-off, constant pressure, constant flow and load sensitive etc.

Rated Revolving speed2350/rmin
Pressure rating35Mpa


1. CE certification
2. ISO9001:2000
3. Brass impeller, carbon steel motor shaft, with thermal protecton inside.




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Q:Problems of frequent plugging of oil pump screen of Santana engine
This is your time to replace the oil is not often caused by, if we want to eliminate this situation, there is no other way, only remove the oil pan, then put the oil filter clean, rinse the best diesel engine internal, the impurities to wash and put on the new oil, to replace the oil can be on time.If you want to avoid demolition to solve, it is not completely solve the problem, then can only relieve the symptoms, so it is recommended to remove maintenance, is very simple, just remove the oil pan can be up to a replacement oil pad.
Q:The function of the oil pump screen is troublesome
His main function is to filter the impurities in the oil (including the impurities in the oil itself and the impurities in the lubrication process)
Q:Automobile engine oil pump does not leak pressure, which causes oil seal ring to leak seriously. What is the trouble?
1, check whether there is lack of oil.2, the condition is not very old, check the oil pressure sensor.3, sensor no problem, check the oil pump, see if the pump is not enough oil.Automobile engine oil pump with crank, when the engine speed of pump oil is high, therefore need a pressure relief valve to keep the oil pressure of the main oil channel, the excess oil drain back to the oil pan, if the oil pump pressure relief valve failure, no pressure relief will lead to the oil pressure is too high, will be oil lattice sealing collopse. If the pressure relief valve normally open, it will cause oil pressure is too low, will burn bearings and the like.
Q:No oil for automobile oil pump
First of all, are you sure it is the oil pump? Is it a diesel pump?!! The oil pump is a toothed Wendeng. Where can I find a chain?
Q:How does the motor pump exhaust the air?
The oil pump is not required to take the air, booster pump, brake pump, water pump, clutch pump is the need to take the air, air film method is complicated, the need to add new oil, suggest you go directly to the repair shop repair station
Q:Does the new gasoline pump affect the car?
Oil pressure is not enough, of course, to change, poor oil will lead to sub shaft wear faster. There is no harm in replacing the oil pump
Q:Does the noise come from the oil pump or the valve stem?
As you described, it is not the valve stem, but the valve rod is on the upper part of the engine. Machine oil pump, the oil lamp should be lit, also tried this, call fire, turn on the oil filler hole or open the hood, look not on oil. Not as. On the generator, air conditioning, pumps and other outside of the belt all take off, ignition, not sound, find the outside rotating parts; sound, the engine, specifically, go to the repair shop.I don't know what you mean by the valve cup, but it's serious with the valve.
Q:How does the c4l determine whether the oil pump works? The oil lamp is on
Check that the oil is adequate, enough, that is, the oil pump to be replaced
Q:Buick Excelle replacement oil induction plug, oil pump how much money?
The oil pump is relatively expensive, about 1000
Q:The new car oil pump for three months is out of order. May I ask for a new car?
Hello, you can ask, but manufacturers are accepted, I do not know, mostly for you to replace, not change [

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