Hydraulic Testing & Diagnostics - Maintenance World
WebApr 4, 2014 · If no oil leaks out, the control valve is probably at fault. • If flow drops the same with the control valve in all positions, the system relief valve is probably at fault. This condition could also indicate a leak in the control valve. 6. Relief Valve Diagnosis • If equipment with circuit relief valves is being checked, you can tell when
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Hydraulic Problem With Pilot Controls | Heavy Equipment Forums
WebJun 25, 2009 · It appears the control block is divided into three segments. One being, turntable, blade, and offset boom (This group works fine). Second being Right track, bucket, and aux, and a third being boom, left track and crowd. When you try one function all by it self it sounds like a relief valve is opening, not sure which one, port or main relief.
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CN103114623B - Remote control system of walking excavator
Web120. Price: US$ 55.00. Complete Technical Diagnostics, Operation and Test Manual with Electrical Wiring Diagrams for John Deere 120 Excavators, with all the workshop information to maintain, diagnose, and service like professional mechanics. John Deere Excavator 120 workshop Diagnosis & test manual includes: * Numbered table of …
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Fluid Power Test 3 (6,7,8,9,10,13) Flashcards | Quizlet
WebSep 3, 2019 · Study with Quizlet and memorize flashcards containing terms like Most transient suppression modules consist of an rc circuit that is designed to suppress the coil voltage transients to approximately what percentage of the peak coil supply voltage?, Pilot devices are used in motor control circuits to provide _______, Which of the following are …
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Diagnosis And Troubleshooting Steps Of Excavator With High …
WebMay 18, 2020 · After the excavator is repaired or replaced, the fault can be eliminated. ← Komatsu PC200-5 Type Excavator Engine Can Not Start Failure Phenomenon And Troubleshooting Diagnosis And Elimination Of Excavator …
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Crawler Excavators - HydraForce
WebGet More Control with EHPV Patent-pending EHPV90-G33 ElectroHydraulic Pilot Valve enhances EH control with a unique mechanical feedback mechanism. This feedback scheme dramatically improves hysteresis and control response. Application Details Powertrain Variable Speed Fan Drives Suspension Systems Main Controls Auxiliary …
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Notes on Pilot Circuits (With Diagram) | Mines - Your Article Library
WebIntroduction to Pilot Circuits: In collieries at almost every face there are electric motors, coal cutting machines, armoured flexible conveyors, coal drilling machines, ventilating local fans, compressors pump sets etc. All these equipment's are switched on and off by means of some control circuit called pilot circuit. The operators start
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US6241482B1 - Hydraulic pilot circuit - Google Patents
WebCheck the tank oil level to be sure it covers the top of the strainer by at least 3˝ at minimum oil level, which is with all cylinders extended. If it does not, there is danger of a vortex forming above the strainer which may allow air to enter the system when the pump is running. Notice the condition of the inlet hose (if one is used).
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Why is my excavator so slow? - Plant & Works Engineering
WebOct 21, 2020 · First check the power unit. Is the engine struggling? Basically, if the engine is not running correctly or in need of a service, then it cannot provide the necessary power for the hydraulic pumps to supply the flow to run the system. Secondly, check the flexible drive coupling. This could be worn, shattered or even slipping on the drive shaft.
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Scene7
WebNov 15, 2018 · Fuel temperature sensor connection terminal resistance inspection: 1-2 Resistance value: 1.31KΩ When an open circuit occurs, the system temperature set by the control computer is: -30 °C; when the short circuit is faulty, the system that controls the computer is set. The temperature is: 120 °C.
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CN103114623B - Remote control system of walking excavator
WebA hydraulic pilot circuit having a pilot pump which discharges pilot oil, and a plurality of pilot valves which control a plurality of hydraulic directional control valves by supplying the pilot oil with control, wherein heating of hydraulic oil due to retaining pilot pressure oil is reduced, and controllability is not damaged even if the plurality of pilot valves are …
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Hydraulic Problem With Pilot Controls | Heavy Equipment Forums
WebApr 4, 2014 · • Remove the support and examine the open port in the control valve as the equipment settles. If oil leaks from the port, the control valve spool is leaking. • If no oil is leaking from the control valve, check the cylinder as follows. Run the cylinder to one end of its stroke. Support the equipment if it is raised, then shut off the engine.
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Fluid Power Test 3 (6,7,8,9,10,13) Flashcards | Quizlet
WebTechnician A says temperature-compensated flow-control valves have replaced electronic temperature sensors on modern mobile machinery. Technician B says flow-control valves are used to regulate actuator speed, regulate priority of oil flow, and divide oil in proportions. Who is correct? Students also viewed Quiz 6 30 terms cgass32 Quiz 9 Quiz 11
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Pilot Oil Supply Circuit - JustAnswer
WebApr 8, 2012 · Pilot oil flows through pilot filter (10), pilot oil manifold (9) and passage (20). The pilot oil opens check valve (18) and goes out through passage (17) to hydraulic activation control valve (8). Pilot oil then goes to the pilot control valves. Accumulator (3) provides oil to the pilot line as makeup oil. During combined operations, the pilot
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Pilot Oil Supply Circuit - JustAnswer
WebApr 8, 2012 · Pilot oil flows through pilot filter (10), pilot oil manifold (9) and passage (20). The pilot oil opens check valve (18) and goes out through passage (17) to hydraulic activation control valve (8). Pilot oil then goes to the pilot control valves. Accumulator (3) provides oil to the pilot line as makeup oil. During combined operations, the pilot
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Fluid Power Test 3 (6,7,8,9,10,13) Flashcards | Quizlet
WebTechnician B says flow-control valves are used to regulate actuator speed, regulate priority of oil flow, and divide oil in proportions. Valve that ensures that the demand of the primary circuit is met first before any remaining oil can be sent to secondary circuits. Common type of excavator hydraulic control system that uses a complex
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Diagnosis And Elimination Of Excavator Pilot Control Oil Circuit
WebMay 18, 2020 · Diagnosis And Elimination Of Excavator Pilot Control Oil Circuit Diagram May 18, 2020. 1. Pilot control oil circuit diagram and cut-off part table during measurement. The pilot control oil circuit is shown in Figure 1-3. The cut-off parts during measurement are shown in Table 1-15. 2. Trouble diagnosis and troubleshooting steps
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320C Excavator Hydraulic System – Stick Drift Reduction Valve
WebPILOT OIL MANIFOLD SCHEMATIC. 4 To Logic Circuit. Return Oil. To Pump Regulator. To Stick Control Valve 2 From Stick Pilot Control Valve. LEVEL FINISH SOLENOID. 121-1490. To Swing Brake TRAVEL SPEED SOLENOID. TRENCHING SOLENOID. PRESSURE REDUCING VALVE. 121-1491. 121-1490. 111-9916. From Main Control …
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John Deere 120 Excavator Technical Manual - Operation & Test …
WebPilot oil is sent from the pilot control valve to port (15) of stick drift reduction valve (16) . Spool (11) shifts downward until the spool contacts plug (22) . The oil in spring chamber (4) flows through passage (5), the orifice in spool (11), spring chamber (20), passage (21), port (18) and drain line (13) to the hydraulic tank.
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Troubleshooting And Removal Of Pilot Control Oil Path Diagram …
WebDec 21, 2021 · The pilot control oil circuit is shown in Figure 1-3. The cut-off area for measurement is shown in Table 1-15. 2. Fault diagnosis and troubleshooting (1) First check whether the overflow pressure of the pilot pump is normal (engine operates at no load and high speed with overflow pressure of 3.281 MPa).
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