Check Valve Plug
Обратный клапан-пробка
Tapón de válvula de retención
The 804049050 Check Valve Plug is a genuine XCMG hydraulic component engineered to provide reliable one‑way flow control in articulated dump truck systems, preventing reverse flow and protecting critical circuits. This OEM check valve plug, identified by part number 804049050, features a precision‑machined steel body, a hardened poppet with a spring‑loaded sealing element, and high‑quality O‑ring seals that ensure positive shut‑off under extreme pressures, vibration, and temperature fluctuations.
Designed for the rigorous demands of mining, quarrying, and heavy construction, the 804049050 check valve plug delivers consistent cracking pressure, zero leakage in the reverse direction, 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 operating environments.
The 804049050 Check Valve Plug is a compact, threaded hydraulic valve that allows free flow in one direction and completely blocks flow in the reverse direction.
This genuine XCMG component is designed to be installed directly into a threaded port, providing a space‑saving solution for preventing backflow in auxiliary and pilot circuits.
Its spring‑loaded poppet opens at a low cracking pressure (0.5 bar), ensuring minimal pressure drop during forward flow, while the hardened seat provides bubble‑tight sealing in the reverse direction.
The zinc‑nickel plated steel body resists corrosion from moisture, salt, and hydraulic fluids, ensuring reliable operation in aggressive mining environments.
This component is a direct OEM replacement, restoring the original check valve functionality of the machine’s hydraulic system.
Regular inspection of the plug for leakage or damage is recommended; replace immediately if any signs of wear or loss of sealing are detected.
Check valves are essential components that prevent reverse flow in hydraulic circuits, protecting pumps, valves, and actuators from damage caused by backpressure or unintended fluid movement.
The 804049050 check valve plug is commonly used in pilot lines, brake circuits, and suspension systems to maintain pressure and prevent load drifting when the pump is de‑energised.
A faulty check valve can allow reverse flow, causing cylinders to extend or retract unexpectedly, leading to loss of control, equipment damage, or operator injury.
By using a genuine XCMG check valve plug, operators ensure that the original flow control and safety characteristics of the hydraulic system are maintained.
Its compact design makes it easy to replace without major disassembly, minimising downtime during maintenance.
The 804049050 check valve plug is engineered with a focus on sealing reliability, low pressure drop, and long service life.
The poppet is precision‑ground to a smooth finish and guided within the body to ensure consistent alignment with the seat, providing positive sealing even after thousands of cycles.
The spring is designed to provide a consistent cracking pressure with minimal hysteresis, ensuring that the valve opens reliably at the set pressure and closes without delay.
An integrated O‑ring seal on the outer threads prevents external leakage and simplifies installation – no additional sealing compound is required.
The hexagonal head allows easy tightening with a standard wrench, and the compact length fits in tight spaces where conventional check valves may not be suitable.
All critical dimensions are verified with CMM equipment to ensure interchangeability with original OEM parts.
The 804049050 check valve plug is constructed from materials selected for their ability to withstand the harsh conditions of mining and construction.
The steel body is zinc‑nickel plated, providing a robust barrier against rust and chemical attack, with salt‑spray resistance exceeding 300 hours.
The poppet is case‑hardened to resist wear from the repetitive impact of opening and closing, maintaining a tight seal over millions of cycles.
The stainless steel spring is corrosion‑resistant and fatigue‑tested to ensure it retains its force characteristics over the life of the valve.
The nitrile O‑ring is compatible with a wide range of hydraulic fluids and temperatures, ensuring a durable, leak‑free seal.
The 804049050 check valve plug is used extensively on XCMG articulated dump trucks, wheel loaders, excavators, and motor graders for preventing reverse flow in pilot, brake, and suspension circuits.
It is commonly installed in cylinder holding circuits, accumulator charge lines, and load‑sensing pressure lines where unidirectional flow is required.
In underground mining, the plug’s compact size and corrosion‑resistant finish make it ideal for use in confined, damp environments where space is limited.
Its reliable sealing performance ensures that hydraulic oil does not leak back, maintaining system pressure and preventing component wear.
By using genuine XCMG check valve plugs, operators can reduce the risk of load drift and improve the safety of lifting and holding operations.
Every 804049050 check valve plug is manufactured in an ISO 9001 and ISO 14001 certified facility, with full traceability of raw materials and production processes.
Incoming steel blanks and spring wire are inspected for chemical composition and mechanical properties.
During assembly, each valve is tested for cracking pressure, flow capacity, and leakage in both directions.
A 100% pressure test is conducted at 1.5 times the maximum working pressure to verify structural integrity and seal tightness.
Samples from each batch are endurance‑tested for over 100,000 cycles to validate wear characteristics and spring performance.
Only valves that pass all tests are released, guaranteeing consistent quality and reliability.
The 804049050 check valve plug is a direct replacement for the original plug 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 G 1/2″ BSPP check valve port.
The standard thread and O‑ring sealing ensure a drop‑in installation without modifications.
For cross‑brand applications, verify that the thread size, pressure rating, and flow capacity match your system requirements.
Always consult your machine’s parts manual to confirm the correct part number before ordering.
Replacing the 804049050 check valve plug requires basic hand tools. Always depressurise the hydraulic system before starting work.
Remove the old plug by unscrewing it with a wrench. Clean the port threads and inspect for any damage or debris.
Apply a thin coat of clean hydraulic oil to the new plug’s O‑ring and threads. Hand‑tighten the plug into the port, then torque to 25‑30 N·m using a suitable wrench.
Pressurise the system and check for leakage around the threads and the valve seat. If leakage is detected, re‑torque or replace the O‑ring.
During routine maintenance, inspect the plug for external leakage, corrosion, or damage. Replace the plug immediately if any signs of wear or leakage are detected.
Keep a spare plug on hand to minimise downtime during unexpected failures.
The 804049050 check valve plug complies with SAE J527, which specifies performance and test methods for hydraulic check valves.
It is manufactured in accordance with ISO 9001 quality management and ISO 14001 environmental standards.
The plug is CE marked and RoHS compliant, meeting international safety and environmental regulations.
Using genuine XCMG check valve plugs ensures compliance with original equipment safety and performance specifications.
Always replace faulty plugs with genuine parts to maintain hydraulic system safety and reliability.
Aftermarket check valve plugs often use softer steel, inferior springs, or poorly machined seats that lead to leakage, chattering, or failure under pressure.
The genuine 804049050 plug is engineered to XCMG’s exacting specifications, ensuring the correct cracking pressure, sealing integrity, and thread fit.
Its high‑quality materials and precision manufacturing deliver reliable, long‑lasting service, reducing the risk of downtime and hydraulic system contamination.
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 804049050 Check Valve Plug is a small but critical component that ensures reliable one‑way flow control in hydraulic systems on articulated dump trucks and heavy equipment.
Its robust construction, precise sealing, and corrosion‑resistant finish deliver dependable performance in the harshest mining and construction environments.
By replacing worn or damaged plugs with genuine XCMG parts, you maintain system pressure, prevent component damage, and reduce downtime.
Always source genuine XCMG components from authorised dealers to guarantee authenticity and quality.
Choose the 804049050 check valve plug for dependable flow control and lasting value.
Invest in genuine XCMG – your partner in reliability and safety.
