We had been motoring with no wind for several hours but were aware of the upcoming strong winds predicted just miles ahead. As we crossed the unmarked line in the water, the wind rapidly increased from 0 to 10 knots and then to 30 knots. At 10 knots, we had pulled out the sails, but at 30, we needed to reef them down. The strong winds set a strong weather helm into the steering system. This is when the force on the sails is not balanced, and the pressure is turning the boat up into the wind. A small amount of this is good, but too much can strain the steering system.
We had the autopilot on, which uses a hydraulic pump to move the cylinder arm attached to the rudder. The sudden strong increase in force on the system strained the pump to move the rudder. Suddenly, there was a significant change in the sound of the pump. The change was so noticeable we had to investigate. When I looked in the engine room, where the pump is located, and to my shock, there was a large puddle of hydraulic fluid on the floor and more coming out. Action needed to be taken quickly.
Emily watched the steering as I took action on the system. I was familiar with how the hydraulic system worked but not in the details of it. Had I known more at the time a screwdriver would have been all it took to stop the loss of hydraulic fluid, but I was not aware. I ran up above and asked Emily how the steering felt. She replied, “soft.” The only action which could be taken was to drop all sails and deploy the backup tiller. I moved as quickly as I could to drop all the sails, but in the heaving, chaotic seas it was a challenge. It took some time to get the tiller set and rigged, but at last we could steer dependably. We motored the rest of the night to Santa Rosalia.
The next day began my education in Marine Hydraulic steering systems. It has taken two months and an ocean crossing to finally determine the system needs to be replaced. I bought parts in Nuku Hiva and will be installing the system in Papeete, Tahiti where supplies can be bought.
The lessons we learned from this experience is that we should consider any unusual behavior in your hydraulic system suspect. Hydraulic systems are extremely reliable when in good working order, but any conditions which fall out of normal operations should be considered a sign of some larger problem beginning. These should be looked at and repaired immediately. It took a series of issues for me to take my system seriously even though I had a hunch I needed to replace the system back in Puerto Penasco while refitting the boat and just did not listen.
If you are not familiar with hydraulic systems the following is an overview of how to find problems in your hydraulic system.
Finding Problems with Hydraulic Steering on a Sailboat
Hydraulic steering systems on sailboats provide smooth and reliable control, but they are not immune to issues. Identifying and troubleshooting problems early can prevent minor issues from becoming major headaches. Here’s a comprehensive guide on how to find problems with manual hydraulic steering on a sailboat.
- Check for Fluid Leaks
The first step in diagnosing hydraulic steering problems is to inspect the entire system for fluid leaks. Hydraulic steering systems rely on fluid pressure to operate, and any loss of fluid can lead to a decrease in performance or complete failure. Look for the following signs of a leak:
- Puddles of hydraulic fluid: Check the area beneath the helm pump and along the hydraulic lines for any signs of fluid accumulation.
- Wet spots or stains: Inspect the hydraulic lines, fittings, and connections for dampness or staining, which indicate a leak.
- Low fluid levels: Open the hydraulic reservoir and check the fluid level. If it’s below the recommended level, top it up and monitor it closely.
- Inspect Hydraulic Hoses and Fittings
Hydraulic hoses and fittings are critical components of the steering system. Over time, hoses can become brittle, and fittings can corrode or loosen. Here’s how to inspect these components:
- Visual inspection: Look for signs of wear and tear, such as cracks, bulges, or fraying on the hoses. Ensure that all fittings are tight and free of corrosion.
- Flex test: Gently flex the hoses to check for brittleness. If a hose feels stiff or cracks during this test, it needs to be replaced.
- Connections: Ensure all hose connections are secure. A loose fitting can cause a leak or introduce air into the system.
- Bleed the System
Air in the hydraulic system can cause spongy or unresponsive steering. Bleeding the system removes trapped air and restores proper function. Here’s how to do it:
- Locate the bleed valves: These are typically found at the helm pump and the cylinder.
- Follow the manufacturer’s instructions: Each system may have specific procedures for bleeding. Generally, you’ll need to open the bleed valve and operate the helm back and forth to purge air.
- Monitor fluid levels: Keep an eye on the hydraulic reservoir during bleeding to ensure it stays topped up and doesn’t draw in air.
- Examine the Helm Pump
The helm pump is the heart of the hydraulic steering system. Problems here can significantly impact steering performance:
- Check for smooth operation: Turn the helm wheel and listen for unusual noises such as grinding or knocking, which can indicate internal damage.
- Inspect for leaks: Look for any signs of fluid around the pump shaft or seals.
- Pressure test: If you have access to a hydraulic pressure gauge, test the system’s pressure. Low pressure can indicate a failing pump or a leak in the system.
- Evaluate the Steering Cylinder
The steering cylinder converts hydraulic pressure into mechanical movement to steer the boat. Problems with the cylinder can cause sluggish or unresponsive steering:
- Visual inspection: Check the cylinder for signs of corrosion, damage, or leaks.
- Seal condition: Inspect the seals at both ends of the cylinder. Worn or damaged seals can lead to leaks and reduced performance.
- Movement test: Manually move the cylinder rod to ensure it operates smoothly without sticking or resistance.
- Monitor Performance
While underway, pay attention to how the steering feels. Common symptoms of hydraulic steering problems include:
- Spongy or soft steering: Indicates air in the system or low hydraulic fluid.
- Hard or stiff steering: Could be caused by a blocked line or failing pump.
- Delayed response: Suggests a leak or worn components within the system.
Conclusion
Regular maintenance and inspection are key to keeping your hydraulic steering system in top condition. By checking for leaks, inspecting hoses and fittings, bleeding the system, examining the helm pump and steering cylinder, and monitoring performance, you can identify and address problems early, ensuring smooth and reliable steering on your sailboat.