Genuine JCB hydraulic relief valve preset to 230 bar, used in the hydraulic control block of JCB 4CX. It protects the circuit by bypassing oil to tank once the pressure reaches the set value.
| Brand | Models / Types |
|---|---|
| JCB | 4CX (various variants – confirm by VIN/control valve spec) |
Some 4CX hydraulic configurations use different relief settings/indices. Share your VIN to confirm fitment.
Limits the maximum pressure in the section. Symptoms: reduced lifting force, oil overheating (continuous bypass), pressure spikes or cavitation noise.
Genuine JCB part ensures the correct relief characteristic, reliable opening pressure and long seat life.
It’s the relief setting for the protected section. Actual operating pressure depends on load and configuration.
Does 25/210300 fit all 4CX machines?Hydraulic blocks vary. This part is used on selected variants — confirm by VIN/control block index.
Is it adjustable?Some versions allow spring adjustment, but it should be set by a qualified technician using JCB data and gauges.
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Circuit Protection
Safely limits pressure to ~230 bar
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Accurate Setting
Consistent opening behaviour
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Genuine JCB
OEM fit and durability
Need compatibility help? Contact us — we’ll confirm by VIN and advise on setup.
Data sheet
Specific References
Manufacturer
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