Used Deutz Fahr Hydraulics

How Does a Tractor's Hydraulic System Work?

The hydraulic system of an agricultural tractor is based on a closed circuit where a hydraulic pump, driven by the engine, draws oil from the reservoir and pushes it under pressure to actuators: lift cylinders, external circuit distributors, power steering, hydraulic motors, and power take-off. On the Deutz-Fahr Agrotron and DX series, the circuit is "open": oil circulates continuously, the pump flows constantly, and the distributor directs the flow according to the operator's command. Pressure is regulated by an integrated pressure relief valve, protecting the hydraulic circuit from overpressure. On Agrotron models equipped with electrohydraulics, an electronic control box manages the lift position via load sensor and automatically adjusts pressure according to the effort exerted by the attached implement. This hydraulic circuit uses UTTO oil whose quality and level determine the machine's overall performance—including frequent front loader applications on Agrotron K models.

What Are the Hydraulic Parts of a Deutz-Fahr Tractor?

• Hydraulic Pump: the central component of the circuit, supplying flow and pressure to all actuators—for Agrotron 4.85, Agrotron 85, Agrotron K420, DX 80, DX 85, 6006, 6150, K100 models.
• Hydraulic Cylinder: linear actuator for the three-point hitch and combine harvester cylinders (unloading auger, reel lifter)—Deutz-Fahr 3580, 6150, DX 85.
• Hydraulic Distributor: directs flow to external circuits and attached tools—models 6150, K100, Agrotron K420, Agrovector 30.7.
• Hydrostatic Motor: provides traction or drives rotating components—Agrovector telehandlers, combine harvesters.
• Hydraulic Cooling: oil radiator maintaining viscosity within operational range—K100, 6150, Agrotron 4.85, Agrotron K420.
• Hydraulic Filters: circuit and return filters to replace at every oil change to preserve the condition of seals and internal parts.
• Hydraulic Reservoir: oil storage tank for the circuit.
• 25,000 references of used agricultural parts permanently in stock at Naintré, shipped across France and internationally.

Deutz-Fahr Tractor Hydraulic Pump: Flow, Pressure and Replacement

The tractor hydraulic pump is the component that determines flow and pressure available throughout the circuit. On Deutz-Fahr DX series tractors (DX 4.51, DX 80, DX 85, DX 90) and numeric series (6006, 6150, 6806), the axial piston or gear pump is driven directly by the engine crankshaft. Four signs indicate a faulty part on the pump: prolonged lift times at full throttle, heavy steering effort, an attached implement drifting to the raised position, and abnormal oil temperature rise. Also check the pump seals—a leak at the pump shaft seal is often the first sign of failure before flow loss. A flow test on a hydraulic bench confirms the defect before any order for a used tractor part. A used hydraulic pump for tractor dismantled from a Deutz-Fahr at end-of-life offers the same compatibility as a new original part, at a significantly lower cost. Contact 05 86 24 00 26 with your model and serial number.

What Are the Main Issues With a Tractor Hydraulic System?

• Insufficient flow: worn hydraulic pump or clogged hydraulic filter—the lift raises slowly, implements respond with delay.
• Drifting in raised position: faulty piston seal in the lift cylinder or internal leakage in the distributor—the implement slowly lowers when stopped.
• External leak: worn cylinder rod seal, loose hose fitting, or pierced distributor seal—must be identified before refilling.
• Hydraulic oil overheating: clogged oil radiator, low oil level, or pump losing efficiency—overheated oil becomes too fluid, reducing circuit effectiveness.
• Heavy steering: insufficient pump, cold oil, or clogged steering filter—needs to be distinguished from a steering cylinder issue.
• Oil contamination: milky appearance (water in circuit) or metallic particles—drain, flush and identify the source before reuse.
• Failing hydraulic seals: always inspect seal condition during diagnosis—distributor spool and cylinder piston seals wear progressively; identifying a defective part early prevents contamination of the entire circuit.
• Clogged hydraulic filter: replace every 500 hours or at each oil change—a saturated filter reduces flow, increases pump load, and accelerates wear of hydraulic components.

Hydraulic Distributor for Deutz-Fahr Agricultural Tractors

The hydraulic distributor for agricultural tractors directs oil flow to external circuits: attached tools, arms of the Agrovector telehandler, machine functions of combine harvesters. On Deutz-Fahr models, two architectures coexist depending on generation: mechanical spool distributor (DX 80, DX 85, K100, 6150), controlled by levers in the cabin, and electrohydraulic distributor with solenoid valves (Agrotron K420, Agrotron 120 MK3), controlled by an electronic box. The most common failures on mechanical distributors are worn spool seals (tool position drift) and seizure due to oil contamination. On electrohydraulic distributors, failures affect solenoid valves and position sensors. TMC Bejenne stocks used hydraulic distributors for models 6150, K100, Agrotron K420 and Agrovector 30.7, tested in workshop before storage.

Agricultural Tractor Hydraulic Components: Used Hydraulic Tractor Parts

Finding a reliable used hydraulic tractor part requires a dismantling yard with sufficient variety to cover the main generations of equipment. This is TMC Bejenne's model since 1945: a permanent 11-hectare site in Naintré supplying a continuously renewed stock of used agricultural tractor parts, with traceability by source machine. All hydraulic tractor components—cylinders, pumps, distributors, hydrostatic motors, filters, oil radiators, and reservoirs—are extracted and individually inspected by our technicians. For farms seeking a tractor hydraulic kit (pump + seals + filter), our advisors assemble tailor-made compatible sets from available stock. Contact 05 86 24 00 26 specifying your model and list of agricultural tractor parts needed.

Hydraulic Parts for Renault, John Deere and Massey Ferguson Tractors at TMC Bejenne

TMC Bejenne does not limit itself to Deutz-Fahr hydraulic parts: the dismantling yard in Naintré supplies a stock of used agricultural spare parts for all makes covering main manufacturers found in French farms. Used parts available for Renault (Ceres, Ares, Atles, Ergos series), John Deere (6000, 7000, 8000 series), Massey Ferguson (5000, 6000, 7000 series), Ford (10, 30, 40, TW series) and New Holland (T5, T6, T7 series) cover the same families of hydraulic components: pumps, cylinders, distributors, and hydrostatic motors. These used vintage tractor parts originate from dismantling identical machines with traceability by machine model. For any sale of used agricultural hydraulic parts for all makes, contact our technicians at 05 86 24 00 26—they will identify the compatible reference in our stock of 25,000 parts.