Hydraulic Cylinder Seal & Rebuild Kits

McCann supplies OEM and quality aftermarket hydraulic cylinder seal kits for equipment including CASE, KOBELCO, Takeuchi, BOMAG, CAT, Deere, Komatsu, Bobcat and Kubota machines. Kit selection is based on the machine make, model, serial number, cylinder function and available identification details. Contact the parts counter to confirm the correct kit, availability, warranty and return terms.

Provide the machine make, model and serial number, along with the cylinder function, such as boom, arm, bucket, blade, outrigger or tilt. A cylinder tag or casting number and clear photographs can also help. Part numbers, bore and rod dimensions, kit contents and seal specifications are confirmed for the individual cylinder rather than assumed from a general catalogue listing.

A rebuild is generally considered when the cylinder has a sound bore, straight rod and serviceable gland. A bent or badly pitted rod, deep bore scoring, cracked gland or other unserviceable component may make a replacement or remanufactured cylinder more practical. McCann can inspect the cylinder during teardown and quote the appropriate repair path based on its condition.

Common causes include rod scoring or pitting, contamination, a damaged wiper, incorrect seal selection and fluid conditions that do not match the seal compound. Contaminated hydraulic fluid can cause repeat failures after a rebuild, so filtration and cleanliness should be reviewed. The rod, bore and related hoses should also be inspected before installing another kit.

Both OEM and quality aftermarket options are available. OEM kits follow the original equipment specification, while a quality aftermarket kit may provide another suitable sourcing option depending on the cylinder and application. McCann confirms the available brand and kit details at the parts counter. State the hydraulic fluid type and machine information when requesting a recommendation.

McCann provides in-shop cylinder rebuilding at branch service departments and on-site service through fully equipped mobile service trucks. On-site suitability depends on safe access, equipment support, stored energy control and the condition of the cylinder. Work must follow the manufacturer’s procedures, with hazardous energy isolated before dismantling and any required inspection or replacement identified during the repair.