Hydraulic Pumps

Hydraulic pumps: The power unit of your truck tail gate

Hydraulic pumps are the power unit of every tail gate. They convert mechanical energy into hydraulic power and thus enable the safe, controlled lifting and lowering of heavy loads – both on classic tail gates and on truck lift gates. If the pump fails, the entire loading system comes to a standstill – with immediate consequences for scheduling and profitability in day-to-day transport operations.

Choosing the right hydraulic pump and high-quality tail gate spare parts is therefore crucial for the performance, safety, and availability of your lift gate. At SULEJ Ladebordwand, we rely on components that are specifically designed for demanding continuous use in commercial vehicles.

Operating principle: How hydraulic pumps build pressure and power

The task of a hydraulic pump is straightforward: it draws hydraulic oil from the tank, pressurises it, and feeds it into the hydraulic system of the tail gate. The pressurised oil then acts on the hydraulic cylinders, which convert this pressure into linear motion and thereby raise the lifting arms and platform of the lift gate or lower them in a controlled manner. Only when delivery volume, pressure level, and all system components are precisely matched does the truck lift gate operate smoothly, without jerking, and at full rated load. A correctly sized hydraulic pump is therefore the basis for precise, repeatable movement sequences of the entire loading system.

Gear pumps in tail gate applications: Robust, compact, proven

Most tail gates use gear pumps. They are considered the proven standard because they are robust, relatively simple in design, and at the same time very durable. Inside, two precisely manufactured gears mesh with each other. As they rotate, hydraulic oil is trapped in the spaces between the gear teeth and transported from the suction side to the pressure side. This displacement generates the system pressure that supplies the hydraulic cylinders of the truck lift gate with energy. Thanks to their compact design, high operational reliability, and insensitivity to changing operating conditions, gear pumps are ideal for daily use in transport and distribution operations.

Materials and design: Quality features of a hydraulic pump

Hydraulic pumps operate under high pressure and are simultaneously exposed to significant temperature changes, vibration, and possible contamination in the hydraulic oil. Material selection and manufacturing quality are therefore critical. High-quality pumps feature pressure-resistant housings made of hardened steel or special aluminium alloys, precisely machined internal geometries to minimise internal leakage, and accurately matched bearings for smooth running. Oil- and temperature-resistant seals ensure that the pump remains reliably tight even after many operating hours – including in daily use on the tail gate. Only the interaction of all these factors enables high efficiency and a consistently stable delivery performance in everyday operation.

Consistently powerful: Correctly maintaining the hydraulic pump on the lift gate

To maximise the service life of the hydraulic pump and the entire hydraulic system, regular maintenance is essential. This includes checking the oil level, visually inspecting for leaks around the pump, lines, and connections, and adhering to the service intervals specified by the manufacturer. Contaminated or aged hydraulic oil can lead to increased wear, higher noise levels, and noticeable loss of performance. Timely replacement of oil and filters prevents damage to the hydraulic pump, valves, and cylinders and ensures that the truck lift gate reliably delivers its rated performance. Professional inspection of the hydraulic system as part of scheduled maintenance helps avoid unplanned downtime and permanently secures the operational safety of the tail gate.

Practice and application benefits: Efficiency in daily tail gate operation

Whether in haulage companies with large fleets, in trades businesses with service vehicles, or for the occasional use of a van – the hydraulic pump is decisive for the functioning of every truck tail gate. A reliable pump means fewer unplanned breakdowns, better scheduled maintenance, and higher vehicle availability. Workshops benefit from hydraulic pumps that can be installed safely and integrated into existing hydraulic systems. Many models are fundamentally universally applicable, provided that key parameters such as delivery volume, pressure range, direction of rotation, connection type, and flange dimensions match the specific system. The product range from SULEJ Ladebordwand is tailored precisely to these requirements and offers pumps that can be integrated into numerous systems without compromising on safety or performance.

The advantages of high-quality gear pumps at a glance

• Constant delivery performance for all lifting and lowering movements
• High operational reliability even under full and continuous load
• Durable design with low wear
• High efficiency and reduced heating of the system
• Precisely matched versions for common tail gate and lift gate systems

Frequently asked questions about hydraulic pumps on tail gates and lift gates (FAQ)

How can I tell if a hydraulic pump is defective?

Typical signs include a slowed or jerky movement of the platform, noticeable loss of performance, unusual noises (such as loud whirring or screeching), or visible oil leakage in the area around the pump. In such cases, the hydraulic pump and the hydraulic system of the tail gate should be checked immediately.

How often should the hydraulic system of a truck lift gate be serviced?

Intervals depend on the manufacturer’s specifications and intensity of use. At least one annual inspection by qualified personnel is recommended. Oil level, tightness, and visible components should also be checked by the operator at shorter intervals.

Can I replace a hydraulic pump myself?

Replacing a pump requires specialist knowledge of hydraulics and vehicle technology. Incorrect installation can cause damage to the hydraulic system and create safety risks. As a rule, replacement should be carried out by a qualified workshop.

Do all pumps fit every tail gate?

No. Hydraulic pumps differ in delivery performance (flow rate), maximum operating pressure, direction of rotation, connection type, and size. Only pumps that are explicitly approved for the specific tail gate or that are technically equivalent in these parameters should be used.

Why is it worth using tested tail gate spare parts?

Tested and specification-compliant spare parts provide defined performance values, high operational safety, and accurate fit. Inferior copies can wear out more quickly, cause pressure loss, overheating, or malfunctions, and in the worst case endanger the safety of operators and cargo.