A high-quality Anti-Relief Valve (ARV), which screws into the backhoe valve block. Its function is to protect individual sections of the hydraulic system from sudden pressure spikes, which can occur, for example, when the bucket hits an obstacle. The valve releases excess pressure to the tank, protecting the rams, hoses, and the valve block itself from damage.
Aftermarket quality product – an intelligent choice combining excellent quality with an attractive price.
| Brand (Machine Type) | Model |
|---|---|
| JCB (Backhoe Loaders) | 3CX, 4CX |
The list above is for reference. Before purchasing, we recommend checking the part number on the old component or in the parts catalogue for your machine.
Before replacing the valve, you must completely depressurize the hydraulic system by lowering all attachments to the ground and operating all levers with the engine off. High-pressure hydraulic oil can cause serious injury. Use safety glasses and gloves.
Replacing the valve is a perfect opportunity to check the condition of the hydraulic oil and filter. Contaminated oil is the most common cause of valve failure. Use high-quality HYPTRON hydraulic oil and change filters regularly to ensure the long and trouble-free operation of the entire system.
A relief valve is a "fuse" for a specific hydraulic section. Its failure can manifest in two ways: if it is stuck open, the ram will have no power. If it is stuck closed, it fails to protect the system from overload, risking a burst hose or a damaged ram.
Replace the valve if you notice:
A faulty valve risks damage to the ram or valve block.
The cost of replacing a valve is negligible compared to the overhaul of a hydraulic ram. Protect your machine from a major failure – order a new GX-AFTER valve and restore full safety and efficiency to your hydraulic system.
This is one of the most common causes. If the valve is stuck open or its spring is weak, it will release pressure before the ram reaches full power. Other causes include internal leaks in the ram or wear in the valve block section itself.
2. Can I adjust the pressure on this valve myself?These valves are factory-set to a specific pressure (in this case, 3800 PSI) and sealed. Attempting to adjust them without proper pressure gauges and knowledge is not recommended and is dangerous. Incorrect settings can lead to damage to the hydraulic system.
3. What is the difference between an ARV and a Main Relief Valve (MRV)?The Main Relief Valve (MRV) protects the entire hydraulic system by setting the maximum pressure for the pump. Anti-Relief Valves (ARVs) are installed on individual sections of the valve block and protect specific rams, often having different pressure settings than the main valve.
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System Protection
Protects rams and hoses from damage.
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Full Machine Power
Restores correct pressure and ram force.
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Operational Safety
Prevents uncontrolled dropping of the arm.
Have doubts or need confirmation to avoid costly downtime? Call us. Our experts will help you choose the right part to get your equipment back to work as soon as possible.
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Fits JCB 3CX 4CX, screwed into the rear arm splitter.

















