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
Yes. The X-Block was specifically designed to allow asingle-acting hydraulic power unit to operate adouble-acting hydraulic cylinder or jack.
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.
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.
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
