HWH Jack Repair Guide

HWH leveling jacks are a popular choice for RV owners, providing stability and ease of use. However, like any mechanical system, they can sometimes encounter issues. This guide aims to provide comprehensive information on how to diagnose and repair common problems with your HWH jacks, whether you're a seasoned DIYer or need to find a professional service.

Understanding Your HWH Leveling Jacks

HWH Corporation, based in Iowa, manufactures a significant portion of the components within their hydraulic leveling jacks. These systems are designed for RVs and other vehicles, offering manual, computerized, and integrated solutions. It's important to be aware of the 1-year limited warranty that accompanies these jacks, which is non-transferable. Understanding the basic operation and components of your HWH system is the first step in effective troubleshooting.

Common HWH Jack Problems and Troubleshooting

When your HWH leveling jacks aren't performing as expected, a systematic approach to troubleshooting is crucial. Here are five common methods to identify the root cause:

1. Basic Electrical Checks: If you press the power button and hear no response, the issue could be as simple as a blown fuse. Check the fuse box for any signs of damage or blown fuses.
2. Visual Inspection: Carefully examine the jacks themselves. Look for any visible signs of damage such as bends, cracks, breaks, or fluid leaks. This can often point to the source of the problem.
3. Consult Your Manual: The owner's manual is an invaluable resource, providing detailed troubleshooting steps specific to your HWH jack model. Keep it handy for quick reference.
4. Manual Override: If your system has a manual override function, utilize it. This can help you retract or lower the jacks manually, bypassing potential electronic or hydraulic issues and allowing you to move your vehicle.
5. Seek Assistance: If you're unable to diagnose the problem, don't hesitate to ask for help from fellow RVers at a campground or a qualified service technician.

DIY Repair and Maintenance for HWH Jacks

Several maintenance tasks and minor repairs can be performed by the owner:

Replacing Hydraulic Fluid

Over time, hydraulic fluid can become contaminated, leading to sluggish jack performance. Replacing the fluid is a common maintenance task. Ensure you use the correct HWH-specific hydraulic oil, which is designed for optimal performance in their systems. This oil is typically available in 1-quart containers and is formulated to work in a wide range of temperatures, down to -20 degrees Fahrenheit.

Checking the Fluid Cap

A loose or improperly tightened fluid cap can lead to leaks. After checking or replacing the fluid, always ensure the cap is securely fastened. If you notice a leak from the cap area, topping up the fluid and tightening the cap is a simple fix.

Repairing Cylinders

While some minor repairs are DIY-friendly, cylinder repairs are generally more complex. These often require specialized tools and knowledge. In most cases, it's advisable to take your RV to the manufacturer or an approved repair center for cylinder issues. HWH does not typically provide individual seal kits for cylinders; instead, they offer cylinder assembly kits which can be costly, or they may rebuild/replace the entire cylinder.

Bleeding HWH Leveling Jacks

Bleeding the hydraulic system removes air that can impede proper operation. The procedure usually involves opening a bleeder valve on the driver's side transmission while someone pumps the clutch. However, some HWH systems are self-bleeding and do not require this process. If your jacks are having trouble retracting and you suspect an air or fluid issue, consult your manual to determine if your system needs bleeding.

Troubleshooting Retraction Issues

If your HWH jacks are slow to retract or won't retract at all, the problem is often not related to fluid levels, as fluid is not typically required for retraction. Common culprits include weak springs or faulty solenoids.

• Springs: To test the springs, try manually pushing the jack upwards. If it retracts easily, the springs may be weak and require replacement. You can purchase HWH spring kits from various RV dealers, but ensure you have the correct specifications (count coils and measure outer diameter, not length) for your specific jack model.
• Solenoids: If the jacks move when you release pressure on the solenoids, the valves within the solenoids might be the issue.

HWH Jacks Won't Go Down

If your jacks are stuck in the retracted position and won't extend, the owner's manual will guide you through switching to manual override. The process typically involves:

Manual Mode Operation (General Steps):

• Turn the ignition to the ACC or ON position.
• Engage the parking brake.
• Turn the system on via the starter button (if applicable).
• Use directional arrows to select the jacks you wish to operate.
• Press the 'dump' button to release any air from the system.
• Lower the jacks, usually in pairs (rear first, then front).

Specific instructions may vary slightly depending on your HWH system model, so always refer to your manual.

HWH Leveling Jack Leaks

Leaks are a common concern. The most straightforward cause is a loose fluid cap. If the leak persists from other areas, it's likely an internal seal issue. As mentioned, HWH often handles these repairs directly, as they may not have a widespread network of authorized repair centers for rebuilding these specific components. Sending the leaking jacks to HWH for repair can be more cost-effective than purchasing new ones.

HWH Leveling System Fuse Locations

For the HWH 610 series, fuses are typically located in the back of the main control box, not the control panel. There are usually around 7 fuses in this box. Common fuse ratings for these systems are 5, 7.5, or 10 amps. The kick-down versions may have fewer fuses, typically 5 and 10 amp ratings. Always use the correct amperage fuse when replacing a blown one.

HWH Leveling System Calibration

Automatic leveling systems can sometimes misinterpret the vehicle's level, especially if parked on slightly uneven ground. If your system appears to be overcompensating or not leveling correctly, calibration may be necessary. This often involves adjusting sensors located underneath the RV. There might be a 4-inch disk with three pointed sensors above it. Adjustment screws are located below the disk. By carefully turning these screws (often by small increments, like half an inch), you can recalibrate the system. This process may require some trial and error to achieve accurate leveling.

Finding Professional HWH Jack Repair

If DIY repairs are beyond your comfort level or the problem is significant, finding a qualified repair service is essential. Typing "RV hydraulic jack repair" into a search engine will yield many results. However, for HWH systems, it's highly recommended to check the HWH website for a list of authorized dealers or repair shops. In many cases, HWH prefers direct shipment of faulty jacks for repair. Remember, if your warranty is still valid, you will need HWH authorization before any repairs commence.

Key Takeaways for HWH Jack Maintenance

• Always prioritize using your warranty when applicable.
• Regularly inspect your jacks for leaks or damage.
• Use only HWH-approved hydraulic fluid.
• Consult your owner's manual for specific troubleshooting steps.
• For complex issues like cylinder repair or significant leaks, contact HWH directly or an authorized service center.
• Understand the difference between manual and automatic operation for troubleshooting.

By following these guidelines, you can effectively maintain and repair your HWH leveling jacks, ensuring they provide reliable support for your RV adventures.