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How to Rebuild Leaking Seastar Steering Cylinders (HS5157 Guide)
The Problem: You find a puddle of hydraulic fluid in your splash well, or oil dripping from the ends of your steering ram.
The Solution: Don't spend $600+ on a new cylinder. If your steering shaft is clean, you can rebuild the seals yourself for a fraction of the cost using the HS5157 Seal Kit.
Repair Specifications
| Difficulty | Intermediate |
| Time Required | 45-60 Minutes |
| Kit Needed | HS5157 Seal Kit |
Diagnosis: Rebuild or Replace?
Before buying parts, you must inspect the Steering Shaft (the chrome rod).
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✅ Smooth Chrome
If the shaft is smooth and shiny, the leak is just a worn-out wiper seal. You can rebuild this cylinder.
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❌ Pitted or Rusty
If you feel rough spots, rust, or pitting on the chrome, the shaft is damaged. It will tear any new seal you install. You must replace the cylinder.
Required Tools
1. Gland Nut Wrench (AMT0004)
You need a pin wrench to remove the End Glands. Our AMT0004 is adjustable and fits perfectly.
2. HS5157 Seal Kit
Contains the two new glands, O-rings, and the critical Seal Guide Tool.
3. Bleed Kit (AMT0106)
After opening the system, you MUST bleed the air out.
Watch the Rebuild
Step-by-Step Instructions
Step 1: Access the Glands
You may need to disconnect the Support Brackets (the triangular arms) to get your wrench on the glands.
Note: If the brackets are seized, use the AMT0001 Puller.
Step 2: Remove Old Glands
Place a drip pan under the engine. Use the Pin Wrench (AMT0004) to unscrew the gland caps (turn counter-clockwise). Slide the old gland off the steering shaft.
Step 3: Install New Glands (Critical Step)
Do NOT simply slide the new gland on! The threaded end of the steering shaft is sharp and will slice the new internal seal.
- Place the plastic Seal Guide Tool (cone) over the threads of the shaft.
- Lubricate the guide with fluid.
- Slide the new Gland over the guide and onto the smooth shaft.
- Remove the guide tool.
Step 4: Tighten and Bleed
Tighten the new glands using the pin wrench. Reattach your support brackets. Finally, perform a full Bleed Service to remove the air introduced during the repair.
Frequently Asked Questions
Why is my steering still leaking after rebuild?
You likely have a pitted shaft. Even a microscopic scratch can allow fluid to bypass the seal under 1000 PSI of pressure.
