Hynautic KS-14 Seal Kit for K51 Cylinders

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Hynautic KS-14 - Seal Kit for K-51 Cylinder

KS-14 is the genuine Hynautic cylinder seal kit used to reseal the K-51 inboard steering cylinder. Typical contents include replacement O-rings, wipers, backup rings, and retaining wire(s) to reseal one cylinder. Always verify the exact cylinder model and revision before ordering.

Compatibility

• Fits: Hynautic K-51 cylinder
• Does not fit: K-31, K-21 to K-29, K-18, K-19, K-11, K-12, K-3, etc. See related kits below.
• How to confirm: Check the cylinder’s stamped model on the end cap or barrel. If unsure, contact Tech Support with clear photos.

What’s Included

• Seal and O-ring set for one K-51 cylinder
• Rod wiper(s) and backup rings as applicable
• Retaining wire or clip as applicable

Note: Contents can vary slightly by cylinder revision. Reuse of hard parts is expected unless damaged.

Related Hynautic Cylinder Seal Kits

Install Overview - Resealing a Hynautic Cylinder

This is a high-level overview to help you plan the job. Follow the Hynautic service manual for exact steps and specs.

1. Prep - Clean the exterior, secure steering, and mark current hardware locations. Protect the rod from scratches.
2. Disassemble - Depressurize the system. Remove retaining wire(s) and end cap per the manual. Withdraw rod and piston assembly.
3. Inspect - Check the rod surface for nicks and the bore for scoring. Replace damaged hard parts before reseal.
4. Reseal - Replace O-rings, backups, and wipers from KS-14. Lightly lubricate seals with compatible hydraulic fluid.
5. Reassemble - Install rod assembly, seat end cap, and re-fit retaining wire(s). Verify smooth travel by hand.
6. Bleed and test - Refill, bleed air, and verify full stroke without binding or leaks. Sea trial under safe conditions.

Tip: If the rod is pitted or the bore is scored, a reseal may not hold. Consider our Hynautic cylinder rebuild service.

Downloads and Resources

Questions?

• Tech Support: Tech Support Page
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