X-Block Hydraulic Adapter
Couldn't load pickup availability
We offer the following methods of delivery:
- Same day Freight Shipping when ordered Mon-Fri before 12pm central time. (excluding holidays)
- Pickup from our Mandeville, Louisiana warehouse
- In some cases, free shipping - please contact us: sales@primarymover.com or call 985-888-6554
X-Block Hydraulic Adapter
Convert a Single-Acting Power Unit into a Dual-Acting Hydraulic System
The Primary Mover X-Block Hydraulic Adapter is a compact, patent-pending hydraulic valve designed to allow a single-acting hydraulic power unit to operate a double-acting hydraulic cylinder or jack.
Originally designed for dump trailers and hydraulic jack systems, the X-Block creates a simple and cost-effective way to add dual-direction hydraulic control without replacing your existing power unit.
The X-Block features a 4-port design labeled: P, T, A, and B. By changing the handle position, hydraulic flow direction is reversed, allowing the cylinder to extend or retract using the same single-acting power source.
How It Works
When the handle is turned one direction:
- P → A
- B → T
When the handle is turned the opposite direction:
- P → B
- A → T
This flow-switching design is what gives the X-Block its name and allows a single-acting hydraulic pump to control both extension and retraction of a double-acting cylinder.
Important Installation Notes
- If you are using this with a dump bed and hydraulic jacks on the same power unit, you will need a manual selector ball valve to switch between hydraulic functions.
- If you are using the X-Block only for hydraulic jacks or another dedicated hydraulic function, a selector valve may not be required.
- Your hydraulic system must allow for a proper return path to tank.
Key Features
- Patent-Pending X-Block Design
- Converts Single-Acting Systems to Dual-Acting Operation
- Compact 4-Port Hydraulic Design
- Rated for Hydraulic Systems up to 3200 PSI
- Ideal for Dump Trailers, Truck Beds, and Hydraulic Jacks
- Simple Mechanical Operation with No Electronics Required
Frequently Asked Questions
Will this work with my single-acting hydraulic power unit?
Yes. The X-Block was specifically designed to allow a single-acting hydraulic power unit to operate a double-acting hydraulic cylinder or jack.
Do I need a selector valve?
If you are running both your dump bed and hydraulic jacks from the same power unit, then yes — you will need a manual selector valve to switch between circuits.
If your power unit is dedicated only to the jack circuit, the X-Block can often be used without a selector valve.
What do the P, T, A, and B ports mean?
P = Pressure
T = Tank / Return
A & B = Work ports to the hydraulic cylinder
The handle changes flow direction internally so the cylinder can extend and retract using the same hydraulic source.
Do I need counterbalance or holding valves on my jack?
It is strongly recommended.
While some customers have used the X-Block without holding valves, doing so requires a strong understanding of hydraulics and system control.
For safer and more controlled operation, we recommend using hydraulic jacks equipped with counterbalance or load-holding valves.
Benefits of Choosing Primary Mover
- Designed around real dump trailer applications
- Built for high-pressure hydraulic systems
- Simple, reliable mechanical operation
- Compact design for easy installation
- Expert hydraulic support from the Primary Mover team
