Nov 15, 2018 · The load P2 is lower than the PR spring (3) output from the self-pressure reducing valve and the PR pressure pushes the valve (2) to the left 1 → the opening between P2 reduces the pressure P1 × d1 area ≈ the force of the spring (3) + PR pressure ×d1 area P1→P2 opening is adjusted so that pressure P1 is higher than pressure PRPR pressure exceeds set pressure cone valve Self-reducing …
Get a quoteA kind of control method solving excavator low speed walking sideslip, is arranged appropriate double pump pressure and fiducial value PPi and corresponding pump proportioning valve current value Ii, wherein i values corresponds to each low gear;By the double pump pressure and P1+P2 of real-time detection practical, it is compared with the double pump pressure of respective notch and
Get a quoteApr 11, 2014 · Visit us at: .practicalhydraulics.com. This time, we are testing the pump of a mini excavator that we believed was not working properly. As a resul
Get a quoteOct 16, 2019 · CAT excavators are among the top five users in the world. Its stable quality has won a very good reputation. Engine oil pressure is too low : 1302 Engine coolant temperature is too high Pump delivery pressure PWM sensor shorted to the body ground : 4205 Standby PWM sensor 1 connected to the body ground is shorted
Get a quoteNov 07, 2016 · All brand new excavator main hydraulic pumps from His Way Manufacturing undergo a four-stage outlet pressure & flow rate test. All pumps are tested beyond OE
Get a quote1. Excavator pressure limiting valve spring is too soft or broken. 2. Carter excavator crankcase oil viscosity is low or insufficient. 3. The oil pump of the excavator is not working well, and the oil circuit of the oil is seriously leaking. 4. Carter excavator oil filter bypass valve spring is too soft and broken. 5. The lubricating oil inlet
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Get a quoteInsufficient output of the hydraulic pump will also cause the excavator to move slowly. This is one of the conduction faults of the hydraulic system. The manipulator can enter the service diagnosis system for relevant pressure test to see if the excavator moves …
Get a quoteA "low engine oil pressure" alarm is deployed 10 seconds after we start up the engine of Caterpillar excavator 325C. If the engine is shut down the engine oil pressure is 7psi instead of zero as shown on the ET. The engine oil pump is ok, engine oil sensor was replaced and harnesses are …
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Get a quotedemands of wheel excavator applications, XT-6 ES hoses are installed in the high pressure hydraulic system. Caterpillar Hydraulic Oil. Maximum protection in all hydraulic systems against mechanical wear and corrosion. Its high zinc content reduces wear, and extends pump life. Provided certain requirements are met (e.g. S•O•SSM
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Get a quoteA kind of control method solving excavator low speed walking sideslip, is arranged appropriate double pump pressure and fiducial value PPi and corresponding pump proportioning valve current value Ii, wherein i values corresponds to each low gear;By the double pump pressure and P1+P2 of real-time detection practical, it is compared with the double pump pressure of respective notch and
Get a quoteKOMATSU EXCAVATOR HYDRAULIC PUMP pressure can not rise: 1. The pump is not oiled or the flow is insufficient-the same as the above-mentioned elimination method. 2. The adjustment pressure of the overflow valve is too low or malfunctions-re-adjust the pressure of the overflow valve or repair the overflow valve. 3.
Get a quotea. Excavator hydraulic pump is seriously worn. The pump leaks seriously at low speeds; the pump pressure is slightly increased at high speeds, but the volumetric efficiency drops significantly due to pump wear and internal bleed, making it difficult to reach the rated pressure.
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Get a quoteWhat are the reasons for the slow action of excavator
Get a quoteA sheared pump coupling is an obvious cause of failure, however the location of some pumps within hydraulic systems makes this difficult to check so it may go overlooked. 6. CHECK YOUR PUMP RELIEF VALVE. It is possible that the entire flow could be passing over the relief valve, preventing the pressure from developing.
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Get a quoteA: (1) the hydraulic pump and its control system are out of order, test the P1 and P2 pump pressure, the normal value should be 32-34M. (2) test the pressure of the pilot circuit, the pressure is always around 3.0M. (3) check whether the valve and the valve seat of the walking system are worn or not. (4) check the pressure of the running motor.
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