Banjo Screws

Banjo screws: The essential hydraulic connector of the tail gate

In the hydraulic systems of modern tail gates, it is often the smallest components that determine functionality and safety. One of these is the banjo screw. At first glance it appears simple, yet it is a precisely engineered component that is indispensable for the safe operation of the entire lifting mechanism. It enables controlled oil flow and provides a secure, pressure-resistant seal within the hydraulic circuit of the lift gate or tail lift. Without the banjo screw, the smooth interaction between cylinders, valves, and hydraulic lines would not be possible. In this category, you will find banjo screws designed specifically for professional tail gate systems. At SULEJ Ladebordwand, we rely on durable, high-precision components that deliver stability, material strength, and long-lasting sealing performance in daily use.

Function and importance of the banjo screw in hydraulic systems

The design principle of the banjo screw is simple yet extremely effective. A central internal channel combined with side openings allows hydraulic oil to flow freely even when the screw is tightly fastened. This ensures a reliable hydraulic connection between lines, cylinders, and aggregates while maintaining a consistent flow of hydraulic fluid. This dual function makes the banjo screw a critical part of the hydraulic control system, combining fastening, sealing, and flow management in one component. As a result, it ensures precise lifting and lowering movements of the tail gate, lift gate, or tail lift.

Construction and materials: The right choice for every application

Banjo screws are manufactured in different versions depending on the hydraulic system requirements. High-strength, zinc-coated steel is commonly used to provide stability and corrosion resistance. For demanding environments or special hydraulic fluids, stainless steel variants are available. Thread size, pitch, and sealing surface geometry also vary depending on the application. Selecting the correct version is crucial, as it directly affects the sealing performance and operational safety of the hydraulic system. As an essential spare part for tail gate systems, the banjo screw significantly contributes to the long-term reliability of the entire hydraulic circuit.

Maintenance focus: How proper inspection extends service life

Even a robust banjo screw is subject to natural wear over time. Regular inspections are therefore essential for maintaining long-term safety. Special attention should be paid to leaks, corrosion on sealing surfaces, and possible damage to the screw head. Correct tightening torque is equally important: insufficient torque may cause leakage, while excessive force can damage threads or crush sealing washers. Professional maintenance and timely replacement prevent follow-up damage and ensure reliable operation of the tail gate or lift gate over many duty cycles.

Precision-built, securely connected: Why quality matters

As a safety-critical connection element, the banjo screw plays a decisive role in maintaining the stability and functional reliability of the hydraulic system. Poorly manufactured copies or low-quality materials can lead to microcracks, leaks, or structural fatigue — potentially resulting in serious malfunctions. At SULEJ Ladebordwand, we only use components with verified material integrity and precise dimensional accuracy. These standards ensure constant sealing performance, pressure stability, and an extended service life under professional operating conditions.

Practical applications: Where the banjo screw shows its strength

Banjo screws are used at all critical points of the hydraulic system — from the hydraulic power unit and valve block to lifting and tilting cylinders. Wherever hydraulic lines must be securely fastened while allowing hydraulic oil to flow precisely, banjo screws take on a central role in the system. Their compact design ensures space-saving routing, which is particularly beneficial in modern lift gates or tail gates with limited installation space.

Key advantages at a glance:

• Space-saving installation thanks to integrated flow paths
• Secure, vibration-resistant connection under high system pressure
• Fast and simple installation
• Consistent flow cross-section for efficient hydraulic performance
• Cost-effective solution thanks to standardized dimensions

The banjo screws offered in this category are compatible with common tail gates, lift gates, and tail lifts. They meet the requirements of professional commercial vehicle applications and ensure precise, reliable, and long-lasting performance across many operating cycles.

Frequently asked questions about banjo screws for tail gates (FAQ)

Why can't a normal screw be used?

A standard screw would block the flow of hydraulic fluid. Only the special banjo screw design — with an internal channel and side openings — allows oil to pass freely even when fully tightened.

How do I determine which banjo screw I need?

The key specifications are thread size (e.g. M12 × 1.5), total length, and sealing surface design. These details can be found in the technical documentation of your tail gate or on the removed component.

Can a banjo screw be reused?

It is recommended to replace the banjo screw after every disassembly. Sealing washers deform during installation and can only provide reliable sealing once. New components prevent leaks and subsequent damage.

What are typical signs of a defective banjo screw?

Typical indications include hydraulic oil leakage around the screw, visible corrosion, or damage caused by improper tools. In such cases, the screw should be replaced immediately.

How do I find the correct banjo screw for my tail gate?

Selection is based on the model designation or serial number of the tail gate. Additional information such as thread size, material, and sealing type helps identify the correct part and ensures safe hydraulic operation.