Hynautic K-22 Fixed-Mount Balanced Steering Cylinder - 1.5" Bore x 10" Stroke

Hynautic K-22 Fixed-Mount Balanced Steering Cylinder - 1.5" Bore x 10" Stroke

The Hynautic K22 is a double rod end, tie-rod constructed hydraulic steering cylinder designed for rigid mounting on an immovable surface. This configuration uses one ball joint rod end to help accommodate alignment changes through the steering arc while maintaining a fixed-mount footprint.

Special Note: The K22 is available again as its own brand, manufactured in the USA, the cylinder will differ in some visual aspects but is the same part.

Features

• Balanced, double rod end cylinder for consistent steering response
• Rigid fixed-mount design for inboard steering installations
• One ball joint rod end for alignment compensation (Hynautic #670030 equivalent)
• Four total hydraulic ports - two 1/4" NPTF ports per end (pressure and relief)
• Integrated bleed screws - mount with bleeds facing up to simplify purging
• Tie-rod construction and brass body components for durability

Specifications

Dimensions and Clearance

Compatibility and Service Parts

• Ball joint rod end (1 required): HP6039 Hynautic Ball Joint (K-22 / K-27 / K-28 / K-29)
• Cylinder seal kits:
  • Pre-1983 (prior to Aug 1983): KS-04 Seal Kit (K-21 thru K-29)
  • Post-1983 (after Aug 1983): KS-06 Seal Kit (K-21 thru K-29)
• Hydraulic steering fluid: HA5430H Hydraulic Steering Fluid - 1 Quart
• Rubber boot: Hynautic #170001 (used on K-22 and K-27, not used on K-28 and K-29)

Installation Tips

• Mount the cylinder so the bleed screws face up to make purging easier.
• Confirm the steering arm geometry allows full travel without binding at either lock.
• Verify clearance for the full installed envelope before drilling the mount surface.
• After installation, cycle steering lock-to-lock and inspect all fittings for seepage under load.

Maintenance Guidelines

• Inspect mounting hardware and the rod end for play, corrosion, and cracking each season.
• Keep the cylinder rod clean and free of nicks to protect internal seals.
• Address any external leakage promptly - small leaks can introduce air and cause spongy steering.
• If steering feels uneven or bypassing is suspected, reseal or rebuild the cylinder to restore performance.

FAQs

Is the K-22 balanced?
Yes. The K-22 is a balanced (double rod end) cylinder designed for consistent steering response.

Does the K-22 use one or two ball joints?
The K-22 uses one ball joint rod end.

How do I know if I need KS-04 or KS-06?
KS-04 is for K-21 through K-29 cylinders built prior to August 1983. KS-06 is for K-21 through K-29 cylinders built after August 1983. If in doubt, contact Tech Support with photos.

Downloads and Resources

• Hynautic K-22 / K-27 / K-28 / K-29 Brass Cylinder Fact Sheet (PDF)
• Hynautic Steering Bleeding Instructions (PDF)
• Hynautic Cylinder Rebuild Service - Bronze (Send us your cylinder)

Questions?

• Tech Support: Tech Support Page
• Check Stock: Stock Inquiry Page
• Shipping Quote: Request Quote Page

Seatech Marine Products, Inc. is an authorized dealer, service center and installer for Hynautic.