How does a hydraulic distributor work?

A hydraulic distributor directs the high-pressure oil flow from the pump to actuators (cylinders, hydraulic motors) by moving internal spools. Depending on the spool position, passages open or close to control movement direction and, on proportional models, flow intensity. The distributor body houses these spools and internal oil distribution channels.

What is the difference between single-acting and double-acting distributors?

A single-acting distributor supplies only one cylinder chamber, with return through gravity or a spring. A double-acting distributor supplies both chambers, allowing active movement in both directions. Double-acting is standard on construction equipment (mini-excavators, excavators, loaders) as it delivers force and precision in both working directions.

How to choose between 12V and 24V for a used electric distributor?

The solenoid voltage must match your machine's electrical system. Compact and light machines typically operate on 12V, while heavy equipment (excavators of 20 tons and above, wheeled loaders) use 24V. Check the manufacturer's plate or your machine's electrical diagram before ordering a used electric hydraulic distributor.

Why is my hydraulic distributor drifting under load?

A cylinder drift under load (unintended movement without control input) usually indicates spool wear or internal sealing failure. Check distributor inlet pressure: if the pump maintains pressure and the cylinder moves alone, the distributor causes an internal leak. Replacing the spool or the entire used distributor typically resolves this issue.

How to connect a hydraulic distributor on a loader?

Identify the four ports: P (pump pressure), T (tank return), A and B (to actuators). Connect P and T first, then A and B referring to the original hookup diagram. Conduct a low flow test before full pressure to verify movement directions. Without a diagram, our team can assist in identifying the original configuration from the distributor reference.