Pressure Relief Valve Assembly
Клапан предохранительный в сборе
Válvula de alivio de presión ensamblada
The 804026414 Pressure Relief Valve Assembly is a genuine XCMG hydraulic safety component engineered to protect critical hydraulic systems from overpressure conditions on articulated dump trucks and heavy mining equipment. This OEM valve assembly, identified by part number 804026414, features a precision‑machined steel body, a hardened spool with a pilot‑operated poppet, and a fully adjustable spring mechanism that ensures accurate, reliable pressure limiting across a wide range of operating conditions.
Designed for the extreme pressures, shock loads, and continuous vibration of surface and underground mining, quarrying, and heavy construction, the 804026414 pressure relief valve assembly delivers consistent cracking pressure, minimal hysteresis, and long service life, making it an essential replacement component for maintaining hydraulic system safety, preventing component damage, and ensuring machine uptime in the toughest environments.
The 804026414 Pressure Relief Valve Assembly is a critical safety device that protects hydraulic components from pressure spikes and overloads on XCMG articulated dump trucks.
This genuine XCMG valve assembly is designed to limit system pressure to a safe level by diverting excess fluid flow to the tank when the set pressure is exceeded.
Its pilot‑operated design provides fast response and stable performance, ensuring that pressure spikes are controlled without excessive pressure override.
The valve’s adjustable spring allows for precise setting of the cracking pressure to match the specific requirements of the machine’s hydraulic circuit.
This component is a direct OEM replacement, restoring the original pressure limiting characteristics of the hydraulic system.
Regular testing of the relief valve is recommended to ensure it opens at the correct pressure and reseats properly after actuation.
Pressure relief valves are essential for preventing catastrophic failure of hydraulic systems by limiting the maximum pressure that components such as pumps, valves, and actuators are exposed to.
The 804026414 valve is engineered to open rapidly when system pressure reaches the set limit, bypassing excess flow to the tank and preventing damage to expensive components.
A properly functioning relief valve also protects against thermal expansion, shock loads, and operator errors that could cause pressure spikes.
In mining and construction equipment, where loads are high and operating conditions are severe, a reliable relief valve is crucial for maintaining safety and uptime.
Replacing a worn or malfunctioning valve with a genuine XCMG unit ensures that the system remains protected to the original design specifications.
The 804026414 pressure relief valve assembly is engineered with a focus on precision pressure control, fast response, and long‑term reliability.
The pilot‑operated design uses a small pilot valve to control the main spool, providing very stable pressure control with minimal pressure override, even at high flow rates.
The main spool is hardened and ground to a mirror finish, ensuring low friction and excellent wear resistance, which contributes to consistent cracking pressure over time.
The adjustable spring mechanism allows for precise setting of the cracking pressure using a lockable adjustment screw, preventing unauthorised changes.
The valve body is designed with a large internal flow passage to minimise pressure drop and noise during relief operation.
All components are manufactured to tight tolerances to ensure consistent performance and interchangeability with original equipment.
The 804026414 valve assembly is constructed from materials selected for their ability to withstand the harsh conditions of mining and construction.
The cast steel body is zinc‑nickel plated, providing excellent corrosion resistance and protection against salt spray, moisture, and chemicals.
The hardened steel spool and poppet are precision‑ground to minimise wear and maintain sealing integrity over millions of cycles.
The spring is made from high‑grade oil‑tempered steel, shot‑peened to relieve stress and prevent fatigue failure under cyclic loading.
All seals are made from high‑quality nitrile or Viton rubber, providing excellent compatibility with a wide range of hydraulic fluids and temperatures.
The 804026414 pressure relief valve assembly is used extensively on XCMG articulated dump trucks, wheel loaders, excavators, and motor graders in surface and underground mining operations.
It is typically installed in the main hydraulic circuit to protect the pump and downstream components from overpressure caused by sudden load changes or blocked actuators.
The valve is also used in auxiliary circuits such as steering, braking, and suspension, where precise pressure limiting is critical for safe operation.
In underground mining, the valve’s robust construction and corrosion‑resistant finish ensure reliable performance in damp, dusty, and confined conditions.
Its adjustable pressure range makes it suitable for a wide variety of hydraulic system configurations and operating pressures.
Every 804026414 pressure relief valve assembly is manufactured in an ISO 9001 and ISO 14001 certified facility, with full material traceability and process control.
Incoming castings and raw materials are inspected for chemical composition, mechanical properties, and dimensional accuracy.
During assembly, each valve is tested on a dedicated flow bench to verify cracking pressure, pressure override, hysteresis, and flow capacity.
A 100% pressure test is conducted at 1.5 times the maximum working pressure to ensure structural integrity and leak‑free performance.
Samples from each batch are endurance‑tested for over 500,000 cycles at rated pressure and flow to validate durability.
Only valves that meet all performance criteria are released, guaranteeing consistent quality and reliability.
The 804026414 pressure relief valve assembly is a direct replacement for the original valve on XCMG articulated dump trucks, including XDA30, XDA40, XDA45, XDA45U, XDA60, TA30, and many other models.
It is also compatible with various XCMG wheel loaders, excavators, and motor graders that use the same valve mounting and port configurations.
The standard G 3/4″ BSPP ports and adjustable spring mechanism ensure a straightforward installation without modifications.
For cross‑brand applications, verify that the pressure range, flow capacity, and port threads match your system requirements.
Always consult your machine’s parts manual to confirm the correct part number before ordering.
Replacing the 804026414 pressure relief valve assembly requires hydraulic system knowledge and standard hand tools. Always depressurise the system before starting work.
Clean the area around the valve to prevent contamination. Disconnect the inlet and outlet lines, and cap the ports to prevent fluid loss and debris ingress.
Remove the mounting bolts and carefully detach the old valve. Inspect the port threads and sealing surfaces for damage.
Install the new valve with the correct orientation, ensuring the inlet and outlet ports are correctly connected. Tighten the mounting bolts to the recommended torque (30‑35 N·m).
Reconnect the hydraulic lines and tighten the fittings to the specified torque. Fill the valve with clean hydraulic fluid before pressurising the system.
Start the engine and run at low speed to purge air from the system. Check for leaks and verify the valve opens at the correct pressure using a pressure gauge.
During routine maintenance, inspect the valve for external leakage, corrosion, or damage. Test the cracking pressure periodically and adjust if necessary. Replace the valve immediately if any abnormalities are detected.
The 804026414 pressure relief valve assembly complies with SAE J527, which specifies performance and test methods for hydraulic pressure relief valves.
It is manufactured in accordance with ISO 9001 quality management and ISO 14001 environmental standards.
The valve is CE marked and RoHS compliant, meeting international safety and environmental regulations.
Using genuine XCMG valves ensures compliance with original equipment safety and performance specifications, protecting both the machine and the operator.
Always replace faulty valves with genuine parts to maintain hydraulic system safety and reliability.
Aftermarket relief valves often use inferior materials, imprecise springs, or poor machining, leading to inaccurate cracking pressure, high hysteresis, or premature failure.
The genuine 804026414 valve is engineered to XCMG’s exacting specifications, ensuring the correct pressure setting, flow characteristics, and response time.
Its high‑quality materials and precision manufacturing deliver long, reliable service life, reducing replacement frequency and maintenance costs.
Genuine XCMG parts preserve warranty coverage and maintain the resale value of your equipment.
Choose genuine XCMG for safety, reliability, and peace of mind.
The XCMG 804026414 Pressure Relief Valve Assembly is a critical safety component that ensures hydraulic system protection on articulated dump trucks and heavy equipment.
Its pilot‑operated design, precise adjustability, and robust construction deliver reliable overpressure protection in the harshest mining and construction environments.
By replacing worn or damaged valves with genuine XCMG parts, you maintain system safety, reduce downtime, and protect your investment.
Always source genuine XCMG components from authorised dealers to guarantee authenticity and quality.
Choose the 804026414 pressure relief valve assembly for dependable hydraulic protection and lasting value.
Invest in genuine XCMG – your partner in safety and reliability.
