SeaStar HS5157 Front Seal Kit for Pivot & Compact Hydraulic Cylinders — Includes Wrench & Guide

If you need to service or rebuild a SeaStar front-mount or pivot hydraulic cylinder, the HS5157 kit supplies the specific parts and tools to replace worn front seal glands quickly and correctly. The kit covers a wide range of SeaStar cylinder models (including several Honda- and OMC-specific pivot cylinders) and arrives ready for installation with a pin wrench and an assembly guide that helps align and seat the seals properly.

Which SeaStar cylinders work with this HS5157 seal kit?

The HS5157 seal kit is designed for many SeaStar front-mount and pivot cylinders, old and current. It fits model numbers across compact and pivot styles, plus a few manufacturer-specific pivot cylinders used by Honda and OMC.

• Compatible models: HC5340, HC5341, HC5342, HC5343, HC5344, HC5345, HC5346, HC5347, HC5348, HC5358, HC5365, HC5375, HC5394, HC5445, HC6750–HC6755.
• Includes parts for threaded end-gland and compact cylinder variants where applicable.
• HC5347 is listed for Honda 115–130-specific pivot cylinders; HC5348 for OMC 77–90-specific units.

What exactly comes in the HS5157 kit and why each item matters?

HS5157 contains the replacement seal glands plus two service tools that streamline removal and correct reassembly. These components reduce the chance of improper seating and leaking after the repair.

• Two seal glands — replace worn or damaged front seals to restore hydraulic sealing.
• Pin wrench — fits gland flats to loosen or tighten the seal gland without damage.
• Seal gland assembly guide tool — holds seals and glands aligned during installation for correct seating.

How will installing this kit affect performance and maintenance?

Replacing deteriorated front seals with the HS5157 kit helps stop external leaks and prevents contaminants from entering the cylinder. Using the included tools speeds the job and reduces the risk of cross-threading or misaligned seals that cause recurring failures.

• Stops external fluid leaks that reduce steering responsiveness and create mess.
• Restores correct gland compression and seal alignment for longer service life.
• Tools reduce installation time and avoid damage from improvised tools.

Are there any installation notes or compatibility tips I should know?

Follow SeaStar torque and assembly recommendations for your specific cylinder model. Clean the cylinder bore thoroughly before installing new seals, and verify cylinder threads and ports for wear or corrosion that might need attention prior to assembly.

• Inspect cylinder rod and bore; replace or polish if pitting or scoring is present.
• Use proper hydraulic fluid and bleed the system after reassembly per manufacturer procedure.
• Keep parts clean and lubricate seals lightly with compatible fluid before fitting.

Who is this for: The HS5157 seal kit is aimed at marine mechanics, DIY boat owners and professional service shops that maintain SeaStar steering systems. If you own or service boats equipped with compatible SeaStar pivot or compact cylinders and need a reliable front-seal replacement kit that includes the correct installation tools, this HS5157 kit is a practical, OEM-compatible option to restore sealing performance and extend cylinder life.