A genuine valve block (hydraulic control unit) for 4-speed Powershift transmissions. It is the "brain" of the gearbox, consisting of precision valves and solenoids that direct oil flow to engage the appropriate gears and travel direction (forward/reverse). The set includes all the solenoids shown in the picture.
Genuine JCB product – a guarantee of the highest quality, perfect fit, and 100% compatibility with your machine.
| Brand (Machine Type) | Model |
|---|---|
| JCB (Backhoe Loaders) | 3CX, 4CX (models with Powershift transmission) |
| JCB (Telehandlers) | Loadall (selected models, e.g., 531, 541, TM320) |
The list above is for reference. We recommend visually comparing the block with your old part before purchasing.
To provide the new block with ideal working conditions and protect your investment in a genuine part, you must change the transmission oil (we recommend HYPTRON) and replace the transmission oil filter with a new, high-quality REDX filter.
The valve block is the command center of the Powershift transmission. It receives electrical signals from the switch in the cabin and precisely directs oil pressure to the appropriate clutches to change gear or direction of travel. Its failure can immobilize the machine or cause very dangerous behavior on the road.
Replace the valve block if your transmission:
✓ Uncompromising Quality: Choose a Genuine JCB Part
By choosing a genuine JCB valve block, you are investing in 100% certainty and peace of mind. You receive a part designed and manufactured by the maker of your machine, which guarantees a perfect fit, factory-smooth gear shifting, and maximum durability. Don't take risks with replacements – choose the quality that pays off.
Is your machine jerking or losing drive? Don't risk further damage to the transmission!
Our valve block is available off-the-shelf. Order now and restore your machine's factory drivetrain performance.
No, this model is designed exclusively for 4-speed Powershift transmissions. Blocks for Autoshift transmissions have a different design and part numbers.
2. Is transmission calibration required after replacing the block?For Powershift gearboxes, electronic calibration is generally not required, unlike the more complex Autoshift transmissions. However, you should check the smoothness of the gear changes after replacement.
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Genuine JCB Quality
100% certainty and maximum durability.
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Smooth Shifting
Restores the gearbox's factory operation.
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Complete Solution
Valve block complete with solenoids.
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.
Data sheet
Specific References
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Suitable for JCB 3CX 4CX backhoe loaders

















