Seal kits

Seal sets for hydraulic cylinders — also known as repair kits — bring together in a single package all the sealing components required for a complete overhaul of a hydraulic cylinder. Instead of identifying and ordering each seal individually, the kit ensures that you have all compatible components, in the correct materials and dimensions for the specific cylinder model. This simplifies maintenance, reduces the risk of ordering errors, and shortens the duration of the intervention.

What are seal sets and what components can they include for hydraulic cylinders

A seal set includes piston seals, rod seals, rod wipers, piston and cylinder head guide rings, static O-ring seals for flanges and the cylinder head. Some kits also include components specific to the cylinder model. You can find individual hydraulic seals on hydsealstore.ro for completing kits or separate replacement.

How to choose the right kit according to the cylinder model and dimensions

Identifying the correct kit starts with the technical data of the cylinder: the bore diameter, rod diameter, and, if available, the manufacturer's code or reference. With this information, the kit with correctly sized seals is selected. You can also find individual O-rings in our catalog for individual replacements.

When replacement of the seal set is necessary: leaks, pressure losses, and incorrect operation

Replacement of the complete set is recommended when external oil leaks appear at the rod, in case of internal pressure losses (the cylinder does not maintain its position under load), during a scheduled overhaul after a number of operating hours, or when the cylinder has been disassembled for other reasons. If a single seal has failed, the others are probably close to their wear limit. You can also find O-ring cord for seals with non-standard dimensions.

Steps for preparing the cylinder for repair and correctly installing the seals

Before installing the new seals, the disassembled cylinder is completely cleaned — all metal components are degreased and visually inspected. The rod is checked for scratches or corrosion. The grooves are cleaned of remnants of the old seals. The guide rings are installed first, followed by the piston seals and rod seals. At each step, the correct orientation in relation to the pressure direction is checked. You can also find individual guide rings in our catalog.

How to choose and order the right seal set from the Hydraulic Seals Store catalog

We keep in stock seal sets for hydraulic cylinders frequently used in Romania, with fast delivery throughout the country. If you have the rod and bore diameters, you can quickly identify the right kit from the online catalog. If you are not sure about the choice, contact the Hydraulic Seals Store team with the technical specifications of the cylinder — we will identify the correct set for you or build a custom kit.

Frequently asked questions

What does a hydraulic cylinder repair kit contain?

A repair kit includes the piston seals, rod seals, wipers, guide rings, and static O-rings required for a complete cylinder overhaul. Some kits also include components specific to the cylinder model.

Can I order a kit according to the dimensions of the rod and cylinder?

Yes. With the rod diameter and cylinder bore diameter, you can identify the right kit from the catalog. If the dimensions do not correspond to a standard kit, the Hydraulic Seals Store team can build a custom kit with the required components.

When should all seals be replaced, not just the worn component?

Complete replacement is recommended when the cylinder has leaks, does not maintain pressure, or has accumulated a large number of operating hours. If one seal has failed, the others are close to their wear limit, and a partial replacement will require another intervention soon.

What information is required to choose a seal set?

The cylinder bore diameter and rod diameter are essential. The manufacturer's code or cylinder model reference further simplifies identification of the correct kit. With this information, our team quickly identifies the right set.

How should the seals in a kit be stored and installed correctly?

The seals should be stored in their original packaging, at moderate temperatures, protected from direct light. During installation, each component is lightly lubricated, its orientation in relation to the pressure direction is checked, and it is inserted without forcing or twisting.