25/618901 Main Relief Valve For JCB 25618901

25/618901 Main Relief Valve For JCB 25618901.
Optimize your JCB machine’s hydraulic system with this high-quality main relief valve. It ensures consistent pressure control, preventing leaks and system failures. Engineered for toughness, it performs reliably in demanding conditions like construction and earth-moving projects. The valve contributes to smoother operation, reduces maintenance needs, and enhances overall equipment lifespan. Its user-friendly design allows for straightforward replacement. Depend on this valve for superior pressure management, improved safety, and extended service intervals—making it a smart choice for your heavy equipment needs.

Part number 25/618901, also listed as 25-618901 or 25618901, is a widely adopted main relief valve (MRV). It serves as an upgraded interchangeable replacement for 25/222659 and 25/929310, with full cross-compatibility for direct installation. Threaded onto the main control valve block of gear pump hydraulic systems, it acts as the primary pressure-limiting safeguard for the whole machine. It caps the maximum system pressure and rapidly diverts high-volume pressurized oil back to the tank when overloaded during dozing, digging or heavy-duty operations, protecting hydraulic gear pumps, high-pressure hoses and multi-way valve bodies from burst damage. Full technical data is available on our dedicated parameter page. This aftermarket valve is built for long service life under continuous heavy loads. It fits JCB backhoe loaders and selected wheel loaders equipped with gear pump hydraulic circuits, supporting convenient component replacement and hydraulic system overhaul.

FAQ Section

Q1: What is the function of 25/618901 main relief valve?

A: It limits the maximum pressure of the whole hydraulic system. Under overload conditions, it releases high-pressure oil to the tank to protect pumps, hoses and valve assemblies. It fully replaces part numbers 25/222659 and 25/929310.

Q2: Compatible machine models A:

• Backhoe Loaders: JCB 3CX,4CX,5CX,3DX, 3CX PC,4CX444 SUPER,3CXS-PC, 214,215,216,217,1400B,1550B,1700B
• Wheel Loaders: JCB 414S,414S LE

Q3: Common failure symptoms

A: Weak machine operation under load; functions stall when encountering hard ground; hydraulic oil overheats quickly due to internal leakage, often accompanied by whistling noise.

25618901-main-relief-valve

25/618901 Main Relief Valve For JCB 25618901