MRV 3300 PSI Overload Valve Fit for JCB 3CX 4CX
GX-AFTER

MRV 3300 PSI Overload Valve Fit for JCB 3CX 4CX

Catalog number:SKX975530A Nr OEM:25/222659 Manufacturer:GX-AFTER
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MAIN RELIEF VALVE (MRV) 3300 PSI SUITABLE FOR JCB 3CX, 4CX - 25/222659

Technical Specification and Compatibility

A high-quality Main Relief Valve (MRV), which screws into the front loader hydraulic valve block. Its function is to protect the entire hydraulic system by setting the maximum working pressure. In case of overload, the valve opens and releases excess oil to the tank, protecting the hydraulic pump, rams, hoses, and the valve block from damage.

Part number: 25/222659
Alternative part numbers: 25/618901
Pressure Setting (PSI): 3300
Length (mm): 90
Application: Main relief valve, loader valve block

Aftermarket quality product – an intelligent choice combining excellent quality with an attractive price.

Application in machines

Brand (Machine Type) Model
JCB (Backhoe Loaders) 3CX, 4CX
JCB (Wheel Loaders) 410, 412, 415, 425
JCB (Telehandlers) Loadall

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.

⚠️ Safety Warning

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.

Service Recommendation: Ensure Maximum Lifespan

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.

Part's Role in the Machine and Failure Diagnostics

The MRV is the "fuse" of the entire hydraulic system. Its failure can manifest in two ways: if it is stuck open, the entire hydraulic system will be weak. If it is stuck closed, it fails to protect the system from overload, risking a burst hydraulic pump.

  • › Lack of power on all hydraulic functions (both loader and backhoe).
  • › Very slow operation of the entire hydraulic system.
  • › Loud hydraulic pump operation, especially at full joystick travel.
  • › Overheating of the hydraulic oil.
  • › Visible oil leaks from the valve itself.

Peace of Mind Guarantee: Why Choose Our Offer?

A faulty valve risks destroying the hydraulic pump.

The cost of replacing a valve is negligible compared to the overhaul of the entire hydraulic system. Protect your machine from a major failure – order a new GX-AFTER valve and restore full safety and efficiency to your hydraulic system.

📞 Can't find the part you're looking for?

No problem. Our website shows only a few thousand of the over 60,000 parts we have in stock. Contact us – we probably have what you need on the shelf!

Expert's Guide: Key Installation Tips

  1. 1 Maintain cleanliness: Before unscrewing the old valve, thoroughly clean the area on the valve block to prevent dirt from entering the system.
  2. 2 Replace seals: Always install a new valve with a new set of o-rings and seals.
  3. 3 Use correct torque: Tighten the valve with a torque wrench according to the values in the service manual to ensure a proper seal without damaging the threads.
  4. 4 Check the pressure: After replacement, the system pressure should be checked and, if necessary, adjusted using a pressure gauge.

Frequently Asked Questions (FAQ)

1. My machine's entire hydraulic system is weak. Is it definitely this valve's fault?

This is one of the most common causes. If the MRV is stuck open or its spring is weak, it will dump pressure from the pump before it reaches its full value. Other causes include a worn hydraulic pump or leaks in the system.

2. Can I adjust the pressure on this valve myself?

These valves are factory-set to a specific pressure 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 MRV and an ARV?

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.

Key Advantages

🛡️

System Protection

Protects the pump and rams from damage.

🎯

Full Machine Power

Restores correct pressure and ram force.

📦

Operational Safety

Prevents uncontrolled dropping of the arm.

Question mark

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.

SKX975530A
25/222659
0.25 kg

Data sheet

SUITABLE FOR
JCB
MACHINE TYPE
BACKHOE LOADER
OEM NUMBERS
25/222659 / 25/618901

Specific References

MPN
25/222659
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MRV 3300 PSI Overload Valve Fit for JCB 3CX 4CX

Catalog number: SKX975530A
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Manufacturer

  • Serwis Kop Sp. z o.o. Sp. K.
  • Podkarpacka 57a
  • 35-082 Rzeszów
  • Poland
  • [email protected]
  • +48178643100

Responsible person

  • Serwis Kop Sp. z o.o. Sp. K.
  • Podkarpacka 57A
  • 35-082 Rzeszów
  • Poland
  • [email protected]
  • +48178643100
gross price

141.45 zł

net price
115,00 zł
Available in large quantity Temporarily unavailable
115,00 zł
net price

141.45 zł

gross price
Nie możesz dodać więcej produktów
  • You will receive 12 points, it gives you 4.80 zł
  • Lowest price from 30 days before the discount: 141.45 zł
    PRODUCT SPECIFICATION
    SUITABLE FOR
    JCB
    MACHINE TYPE
    BACKHOE LOADER
    OEM NUMBERS
    25/222659 / 25/618901

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    WE OFFER PRODUCTS OF THE BEST BRANDS

    SERWIS KOP Sp. z o.o. Sp.k.
    ul. Podkarpacka 57A, 35-082 Rzeszów
    NIP: 813-352-97-49 REGON: 180286726

    Opening hours
    Telephone support - Monday - Friday (8:00 AM – 5:00 PM)
    Order pick-up - Monday - Friday (8:00 AM – 4:30 PM)

    Email



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