Jetuplusllc Kubota front loader boom & bucket cylinder seal kit — 45mm bore, OEM-compatible 7J273-63400 replacement

Jetuplusllc Boom & Bucket Cylinder Seal Kit 7J273-63400 is a complete hydraulic seal set designed to restore leak-free operation to Kubota front loader cylinders for LA463, LA513, LA514, LA524FL, LA525FL and LA555 models.

This new hydraulic seal kit (part number 1901-1254) replaces Kubota OEM 7J273-63400 and includes the seals sized to a 45 mm bore with a 30 mm outer diameter where specified. The set is built for front loader boom and bucket cylinders so you can repair worn or leaking hydraulic rams without replacing the entire cylinder assembly. It’s intended for owners, technicians, and fleet managers who need a reliable, OEM-compatible sealing solution to keep Kubota tractors performing on job sites, farms, and yards.

What exactly is included in the seal kit and how does it match the OEM?

The kit contains hydraulic seals manufactured to match the form and function of Kubota’s original 7J273-63400 components. Each piece is sized and shaped for a direct fit in the indicated loader cylinder bores, helping to simplify installation and reduce downtime.

• Replacement for Kubota OEM 7J273-63400
• Designed for boom and bucket cylinder applications
• Bore size compatibility: 45 mm; outer diameter references at 30 mm
• Sold as a complete kit for the listed Kubota models

How will installing this seal kit affect hydraulic performance?

Fitting fresh seals restores proper pressure retention and reduces internal and external leaks, which improves lifting response and steadiness. While seals don’t change cylinder strength, they help the hydraulic system operate at designed efficiency and prevent fluid loss that can degrade performance.

• Stops leaks that cause slow or uneven cylinder movement
• Maintains hydraulic pressure for consistent lift and dump actions
• Reduces contaminant ingress to extend cylinder life
• Helps prevent premature pump wear from fluid starvation

Which Kubota models and applications will this kit fit?

This kit is intended for front loader applications on a range of Kubota tractors. Confirm your loader cylinder bore and model year before ordering to ensure compatibility with LA463, LA513, LA514, LA524FL, LA525FL and LA555 loaders.

• Compatible with Kubota front loader models listed above
• Specifically replaces OEM part number 7J273-63400
• Fits cylinders with a 45 mm bore specification
• Ideal for boom and bucket cylinder repairs

What should I know about installation and maintenance?

Installing seals requires basic hydraulic repair skills and the correct tools to disassemble the cylinder without damaging surfaces. Inspect rods and bores for scoring and clean thoroughly; replacing seals on worn hardware will reduce service life of the new parts.

• Use proper cylinder pulling tools and keep components clean
• Inspect and polish rod surfaces before fitting new seals
• Follow torque and assembly procedures from loader or service manual
• Test at low pressure first to confirm leak-free operation

Who is this for: This Jetuplusllc seal kit is for tractor owners, mobile technicians, and maintenance shops that service Kubota front loaders and want an OEM-compatible, cost-effective way to repair leaking boom or bucket cylinders. It’s well suited for farmers, landscapers, rental fleets, and anyone maintaining LA463, LA513, LA514, LA524FL, LA525FL or LA555 loaders who need a dependable hydraulic sealing repair with clear fitment and part-number cross-reference to Kubota 7J273-63400.