Pressure Balance Cylinders

Equalising cylinders – platform synchronisation on the tail lift

Equalising cylinders ensure that the platform of a tail lift remains horizontal even under uneven load. They connect both lifting sides hydraulically and balance volume differences between the main cylinders. At SULEJ Ladebordwand you will find equalising cylinders in different stroke classes and connection patterns, matched to the installed component and available in various sizes and connection variants – a compact element for a level loading surface during operation.

Synchronisation of the platform – the technical principle

In the classical layout two lift cylinders work on both sides of the lifting frame. If the platform is loaded on one side, the hydraulic oil flows between the cylinders through the equalising cylinder in such a way that the pressure conditions are balanced. The component works as a double-acting unit with a defined piston area and communicates with the lift cylinders through cross-connected lines. Hardened steel housings, precisely honed internal surfaces and pressed piston rings ensure that even after many load cycles no creeping tilt occurs.

Wear symptoms and replacement routine

A worn equalising cylinder often shows itself by one platform side slowly sinking under load. Visible oil traces at the rod exit or audible oscillation during lifting are also clear indicators. When replacing, fully relieve the platform, secure it mechanically and thoroughly bleed the connection lines after installation. Pay attention to clean sealing surfaces at the rod head, the correct fittings and the prescribed tightening torque of the high-pressure connections.

Benefits at a glance

• Level platform even with uneven loading
• Hardened steel housings and precisely honed internal surfaces
• Double-acting design with defined piston area
• Compatible with common connection patterns and high-pressure lines

A functioning equalising cylinder prevents tilt positions and thus protects cargo and operator from uncontrolled movements during load changes.