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  • Hydraulic Pump Basics Hydraulic Pump Purpose - Parker …

    10 GPM Pressure Compensated Pump Pressure Compensator set at 3000 PSI Relief Valve Set at 3200 PSI Flow Control Set for 5 GPM Load Pressure is 2000 PSI What is horsepower being consumed while the cylinder is extending ? 5 GPM * 3000 PSI / 1714 = 8.7 HP How much horsepower is being wasted ? 5 GPM * 1000 PSI / 1714 = 2.9 HP (HP = GPM * PSI / 1714

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  • Setting and Troubleshooting Relief Valves in Hydraulic …

    Hitachi Excavator Relief Valve | Pressure Overflow Valve

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  • Hyundai Excavator Valve | Pressure Control Main & Assy - Finotek

    High performance valve with long service life. Hyundai Excavator Valve, Hyundai R200-5 Excavator Pressure Control Main And Assy Valve. Guarantee & Return Policy: 1. All valves will be tested before shipping. 2. 6- 12 months limited guarantee for a defect Item (excluding Items wrong working operation and unqualified damaged by buyer).

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  • Setting and troubleshooting Hydraulic pump pressures

    How to Property Set Relief Valves - Quality Hydraulics

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  • Relief Valve Hitachi EX200-3 Hydraulic Pump Parts

    High quality Relief Valve Hitachi EX200-3 Hydraulic Pump Parts from China, China's leading EX200-3 Hydraulic Pump Parts product, with strict quality control Hitachi EX200-3 Hydraulic Pump Parts factories, producing high quality Hitachi EX200-3 Hydraulic Pump Parts products. Excavator Main Relief Valve: Part NO. Relief Valve: Applicable Models

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  • Three minutes to learn how to adjust the main relief valve when

    Jun 11, 2019 · The main relief valve has two sets of set pressure. When the heavy load is required, the excavator needs to be forced to enter the main relief valve through the pilot oil, and the spring setting force is increased for a short time, so that the hydraulic pump power is increased by about 10%. . Fault phenomenon

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  • Hitachi 100 Series Excavators Hydraulic Pumps – Tagged "Hitachi

    Spare excavator parts, equipment & hydraulic shop. Leemar is a global supplier of new & used excavator parts. We ship across Canada, and USA. New, Rebuilt, Used Parts. Contact Us Today.

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  • Hitachi EX Hydraulic Pump Control Problems - Heavy Equipment Forums

    May 10, 2021 · It starts with everything operating at about 50% speed and gradually slows down to dead slow. I've checked the wiring and the control modules are both blinking red. The engine is operating fine and in checking the pump pressure, I get 800 psi for the pump delivery pressure when in neutral. Under a load, the main relief pressure jumps to 6000 psi.

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  • Pump Compensator and Main Relief Valve Adjustment Demonstration

    One of the most common, hydraulic systems issues we help our customers troubleshoot is hydraulic systems running too hot. More often than not, this is due to having a pressure-compensated pump and the fluid being dumped over the relief rather than over the compensator- creating heat. To learn more, watch this follow-up video (part 2 […]

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  • Quality Excavator Hydraulic Pump Parts & Hitachi Excavator Hydraulic

    6685325 881-953 881953 Hitachi Excavator Hydraulic Parts K3V112 Piston Assy Replacement. Warranty:1 Year. Application:Hydraulic System& Machine Tool Industry,Construction Machinery.

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  • Quality Excavator Hydraulic Pump Parts & Hitachi Excavator Hydraulic

    6685325 881-953 881953 Hitachi Excavator Hydraulic Parts K3V112 Piston Assy Replacement. Warranty:1 Year. Application:Hydraulic System& Machine Tool Industry,Construction Machinery.

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  • Hitachi 100 Series Excavators Hydraulic Pumps

    Hitachi 100 Series Excavators Hydraulic Pumps FILTER. IN STOCK. Hitachi Zaxis 160-3 Main Hydraulic Pump View Part. If you are looking for excavator parts, Leemar is your source! 250-248-2611 [email protected] Monday - Friday 7 am to 5 pm 1390 Springhill Road Parksville, BC V9P 2T2 CANADA. Look Up Parts. Search; Links Tap to Open List. About Us;

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  • Setting Pump Compensator & Relief Valve - YouTube

    May 05, 2014 · In this Hydraulic Tip we are using our Mobile Hydraulic Training Lab to demonstrate the proper way to set the Pump Compensator in conjunction with the system

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  • Relief Valve Hitachi EX200-3 Hydraulic Pump Parts

    High quality Relief Valve Hitachi EX200-3 Hydraulic Pump Parts from China, China's leading EX200-3 Hydraulic Pump Parts product, with strict quality control Hitachi EX200-3 Hydraulic Pump Parts factories, producing high quality Hitachi EX200-3 Hydraulic Pump Parts products. Excavator Main Relief Valve: Part NO. Relief Valve: Applicable Models

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  • My hitachi ex100 has lost hydraulics Kinda acts like the pump …

    Slow hydraulics is the lack of flow from the pumps or a relief valve problem. Check your in tank return for fine metal indicating pump and start pulling reliefs to look for damaged o rings and debris holding them open. we are currently working on a hitachi EX450h-5 excavator that has had a hydraulic pump problem being the fact that over the

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  • Pump Compensator and Main Relief Valve Adjustment Demonstration

    One of the most common, hydraulic systems issues we help our customers troubleshoot is hydraulic systems running too hot. More often than not, this is due to having a pressure-compensated pump and the fluid being dumped over the relief rather than over the compensator- creating heat. To learn more, watch this follow-up video (part 2 […]

    Learn More
  • My hitachi ex100 has lost hydraulics Kinda acts like the pump …

    Slow hydraulics is the lack of flow from the pumps or a relief valve problem. Check your in tank return for fine metal indicating pump and start pulling reliefs to look for damaged o rings and debris holding them open. we are currently working on a hitachi EX450h-5 excavator that has had a hydraulic pump problem being the fact that over the

    Learn More
  • Hitachi ZX200-3 Hydraulic Pump Hydraulic Pump Adjustment …

    Jan 25, 2022 · Hitachi ZX200-3 hydraulic pump adjustment method. 1. The adjustment method of the maximum flow rate of the hydraulic pump: We need to loosen the lock nut 1 of the regulator first, and adjust the screw 2 at the same time. Remember that the direction of adjustment is clockwise to increase the flow, and counterclockwise to decrease the flow.

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  • Hydraulic Excavators - Hitachi Construction Machinery

    Since 1965 when Hitachi, Ltd. developed the UH03, Japan's first hydraulic excavator made purely with domestic technologies (The Japan Society of Mechanical Engineers, Mechanical Engineering Heritage Listing No. 48), Hitachi Hydraulic Excavator has been a flagship product of Hitachi Construction Machinery, which has continued to pursue high reliability and superior operability.

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  • HITACHI HYDRAULIC PUMP REPAIR

    Hitachi Excavator UH12/122 Hydraulic Main Pump & Valves: 185: 4089121: Hitachi Excavator UH121 Hydraulic Swing Motor: 242: 4104855: Hitachi Excavator UH121 Hydraulic Swing Motor: 185: All of our Hitachi excavator hydraulic pumps carry a one year warranty and offer a full money back guarantee. We usually can ship your Hitachi excavator

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