Question 1

What is an agricultural hydraulic distributor?

Accepted Answer

An agricultural hydraulic distributor is the hydraulic circuit component responsible for directing pressurized oil flow to actuators (cylinders, hydraulic motors) and controlling their direction of movement. Operated by a lever, joystick, or electrical signal, it controls all hydraulic equipment mounted on the tractor: front loader, lift, attached tools. It is available in single-acting, double-acting, manual, or electrohydraulic versions, monoblock or modular.

Question 2

What are the different types of hydraulic distributors?

Accepted Answer

The main types are: single-acting distributor (one flow direction, return by spring or gravity), double-acting distributor (full control in both directions), and proportional distributor (fine modulation of flow). Architecturally: monoblock or modular (assembled section by section). Control types: manual (lever or direct spool), mechanical, or electrohydraulic (12 V or 24 V coil). The number of circuits (2, 3, 4, or more) determines available functions.

Question 3

What role does a hydraulic distributor play in a tractor?

Accepted Answer

It directs oil supplied by the hydraulic pump to the cylinders of the front loader, lift, or attached tools and controls movement direction. Without a functioning distributor, no hydraulic equipment can be operated. The distributor also determines speed and force of movements according to its nominal flow and allowable working pressure within the tractor's hydraulic circuit.

Question 4

How do you connect a hydraulic distributor?

Accepted Answer

First, identify ports P (pump supply), T (tank return), and A/B (actuator outputs). Verify that the distributor’s nominal flow and working pressure match your circuit. Check compatibility of hydraulic fittings (BSP or metric threads, hose diameters). Tighten fittings without over-tightening, purge the circuit at low speed checking for leaks, then test operation on the relevant actuator. For any installation difficulties, our technicians are available at 05 86 24 00 26.

Question 5

How can you tell if a hydraulic distributor is faulty?

Accepted Answer

Common signs include jerky or slow movements of the controlled cylinder, loss of power in the tool, visible oil leaks around the distributor body, abnormal noises (whistling, knocking) when operating, and complete lack of response to manual or electrical commands. A pressure test can confirm internal seal failure. If adjustment does not fix the problem, replacement is the most reliable solution.

Used Hydraulic Distributors for Tractors & Combines - page 2

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