Mastering The Art Of Lifting A 5Th Wheel Camper

how to lift a 5th wheel camper

Lifting a 5th-wheel camper is a complex task that requires careful consideration and expertise. The process involves making adjustments to the trailer's suspension, axles, and tires to achieve the desired height while maintaining stability and safety. One common approach is to flip the axle, placing the springs on top of the axle instead of underneath, which can provide a lift of around 3-4 inches. For larger lifts, more extensive modifications may be required, such as installing lifting blocks, using longer U-bolts, or even building a subframe under the trailer. It is important to consider the weight distribution, ground clearance, and overall height of the trailer to ensure safe and comfortable towing.

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Flipping the axle

Understanding Axle Flipping

Axle flipping involves reconfiguring the leaf spring position on your 5th-wheel camper. Typically, the leaf spring is mounted below the axle. However, with axle flipping, the leaf spring is moved to the top of the axle. This alteration requires specialised tools and skills, and it is labour-intensive. While it presents some challenges, axle flipping offers several significant advantages that make it a popular modification for many RV enthusiasts.

Advantages of Flipping the Axle

One of the main benefits of axle flipping is the increased ground clearance it provides. This is particularly useful for RVs with low jacks or those that sit close to the ground. By gaining even a few extra inches, you can more easily navigate rugged roads without damaging the underside of your RV. Additionally, with a flipped axle, you can utilise larger tires, which, in turn, increases your weight-carrying capacity. This is especially helpful when RVing, as it allows you to carry more equipment and supplies.

Another advantage of axle flipping is the reduced risk of undercarriage damage. By raising the height of your RV, you lessen the chances of bottoming out when navigating steep inclines or declines. This is especially beneficial when travelling on public lands, where road conditions can vary significantly, and you want to minimise the risk of damage to your RV's underbelly.

Considerations Before Flipping the Axle

Before embarking on the axle-flipping process, it is essential to determine if your RV is suitable for this modification. Axle flipping is only applicable if your RV has double-eye leaf springs. If your RV is equipped with a slipper-spring suspension system, there are currently no viable conversion kits available. Therefore, it is crucial to identify your RV's suspension type before purchasing any materials or starting the project.

Additionally, it is important to consider the potential impact on wind sensitivity. Flipping the axle raises the height of your RV, which can make it more susceptible to high winds. This increased height may lead to travel delays when expecting windy conditions. Furthermore, the higher climb into your RV may require you to replace your steps or carry a separate step stool to ensure safe entry and exit.

Step-by-Step Guide to Flipping the Axle

If, after careful consideration, you decide to proceed with axle flipping, here is a step-by-step guide to help you through the process:

  • Get a Conversion Kit – Ensure you select the correct conversion kit for your RV's suspension system. Note your RV's axle diameter and purchase the appropriate over/under axle flip conversion kit from a local or online retailer.
  • Disconnect the Brake Wires – Jack up your RV to a height of about 8 inches off the ground and secure it. Then, disconnect the brake wires and remove the shackle plate bolts, U-bolts, and leaf springs.
  • Follow the Kit Instructions – Read through the manufacturer's instructions provided with your conversion kit and follow them meticulously. Do not skip any steps to avoid making dangerous mistakes.
  • Reconnect the Brake Wires and Shock Absorbers – After installing the conversion kit, reconnect the brake wires and shock absorbers. You may need to solder the brake wiring. Ensure that your brakes are functioning correctly before finalising the process.

By following these steps and taking the necessary precautions, you can successfully flip the axle on your 5th-wheel camper, reaping the benefits of increased ground clearance and weight capacity while also being mindful of potential challenges.

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Adjusting the kingpin

To adjust the kingpin, follow these steps:

  • Park your camper on a level surface and measure the distance between the front and rear of the camper to the ground. This will give you a baseline for how much you need to adjust the kingpin.
  • Loosen the bolts that secure the kingpin to the frame. Do not remove them completely, just loosen them enough that you can move the kingpin up or down.
  • Raise or lower the kingpin to the desired height, using the measurements from step 1 as a guide.
  • Re-tighten the bolts securely, making sure to apply the appropriate amount of torque.
  • Measure the new height of the camper and ensure that it is level with the truck bed and that there is adequate clearance.

It is important to note that adjusting the kingpin may not be enough to level your camper, especially if you have a significant height difference between your truck and camper. In this case, you may need to explore other options such as lifting the suspension or adding taller tires. Additionally, always consult a professional if you are unsure about any adjustments or modifications to your camper.

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Using blocks to raise the camper

Raising a 5th-wheel camper with blocks is a complex process that requires careful planning and execution. Here is a step-by-step guide on how to do it:

Step 1: Measure the Height Difference

Before making any adjustments, it is crucial to determine how much height adjustment is needed. Hitch the camper to the truck on level ground and measure the distance at the front and rear of the camper. The difference in these measurements will give you an idea of how much you need to raise the camper to achieve a level position.

Step 2: Assess the Current Setup

Inspect the current configuration of your camper's suspension. Check if the axles are above or below the springs. If the axles are above the springs, flipping them can provide the required lift. This method is generally preferred as it does not alter the suspension geometry as much.

Step 3: Choose the Right Blocks

If you decide to proceed with blocks, select high-quality blocks designed for automotive use. Steel blocks are a common choice for this application. You will also need longer axle "U" bolts and longer centering pins to accommodate the blocks. Ensure the blocks are cut to the appropriate length, which will depend on the distance between the front and rear hanger assemblies.

Step 4: Prepare for Installation

Gather all the necessary tools and safety equipment. You will likely need a drill press or a similar tool to drill holes for the centering pins. It is crucial to ensure that these holes are straight and properly aligned. Have the new, longer "U" bolts and centering pins ready, as well as any other hardware required for the installation.

Step 5: Install the Blocks

Park the camper on level ground and chock the wheels for safety. You will need to raise the camper and support it securely to access the axles. One method is to use a jack to lift one side of the camper at a time, allowing you to remove the tires and access the axles for block installation. Always follow proper safety procedures when working under a raised camper.

Step 6: Secure the Blocks

Place the blocks in position and secure them with the new, longer "U" bolts. Ensure the blocks are firmly in place and all hardware is tightened to the appropriate torque specifications. Double-check that all components are secure before lowering the camper back to the ground.

Step 7: Test and Adjust

Once the blocks are installed, re-measure the height at the front and rear of the camper to ensure it is now level. If further adjustment is needed, you may need to explore other methods, such as adjusting the pin box or installing taller hangers. Always test the camper on a short drive to ensure stability and proper handling before embarking on a longer journey.

Important Considerations:

  • Safety: Ensure you have the proper equipment and knowledge before attempting any suspension modifications. Always follow safety procedures when working under a raised camper.
  • Stability: Raising the camper will increase its center of gravity, which may affect stability during towing, especially in high winds or emergency maneuvers.
  • Warranty: Check with your manufacturer or dealer to understand how installing a lift kit may affect your warranty coverage.
  • Height Restrictions: Be mindful of the total height of your camper after the lift. Taller campers may have issues with low-hanging obstacles, such as tree branches or low bridges.

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Installing a subframe

Step 1: Planning and Design

Before beginning the installation, it is crucial to have a clear understanding of the weight and dimensions of your 5th-wheel camper. This information will guide the design and construction of the subframe. Additionally, consider the type of materials you will use, such as aluminium or steel, and the thickness required to support the weight of the camper.

Step 2: Gather Materials and Tools

Ensure you have all the necessary materials and tools for the installation. This includes the subframe components, such as the frame rails, crossmembers, mounting hardware, and any additional support structures. You will also need standard automotive tools, including wrenches, sockets, and a torque wrench.

Step 3: Vehicle Preparation

Clean the bed of your truck to ensure it is free of dirt and debris. This will provide a stable and secure surface for the installation. It is also important to refer to the manufacturer's instructions or a trusted mechanic to ensure you are aware of any risks, hazards, and proper safety procedures during the installation process.

Step 4: Subframe Assembly

Assemble the subframe components according to your design. This includes joining the frame rails, adding crossmembers for support, and ensuring that all connections are secure. If welding is required, ensure that it is performed by a competent professional to maintain the structural integrity of the subframe.

Step 5: Subframe Installation

Place the assembled subframe onto the truck bed, ensuring it is positioned correctly. Secure the subframe to the truck bed using the appropriate mounting hardware. This may involve drilling holes or making other modifications to the truck bed, so it is essential to plan this step carefully.

Step 6: Final Adjustments and Testing

Once the subframe is installed, make any necessary adjustments to ensure the camper sits level and secure. Test the setup by attaching the camper to the subframe and performing a test tow. Ensure that the camper remains stable and secure during the test tow, and make any necessary adjustments to the subframe or mounting hardware.

Step 7: Maintenance and Care

Regularly inspect and maintain your subframe to ensure its longevity. This includes checking for any signs of wear and tear, tightening any loose hardware, and protecting the subframe from corrosion or damage.

By following these steps, you can successfully install a subframe for your 5th-wheel camper, ensuring a secure and stable connection between your camper and your vehicle.

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Adjusting the pin box

To adjust the height of the pin box, follow these steps:

Step 1: Measure the Current Height

Before making any adjustments, it's important to measure the current height of the pin box. This will help you determine how much you need to raise or lower it. Measure the distance from the front of the camper to the ground, and then measure the same distance at the rear. The difference between these two measurements is the amount you need to adjust the pin box to achieve a level position.

Step 2: Gather Tools and Assistance

Step 3: Support the Pin Box

The next step is to support the pin box securely. Place jacks or stands underneath to bear the weight of the pin box and ensure no one is standing underneath during the adjustment process. Safety should be a priority during this step.

Step 4: Unbolt the Pin Box

With the pin box securely supported, proceed to unbolt it from the frame. Remove the bolts carefully and set them aside, making sure not to lose any of them.

Step 5: Raise or Lower the Pin Box

Once the bolts are removed, you can now raise or lower the pin box as needed. Use the jacks or stands to adjust the height carefully. Ensure that the pin box is level and positioned correctly in relation to the frame.

Step 6: Reinstall and Torque the Bolts

After achieving the desired height, carefully reinstall the bolts. Torque the bolts to the specified tightness. According to Lippert, the torque specifications for different bolt sizes are as follows:

  • 1/2” bolts: a minimum of 110 ft-lb
  • 5/8” bolts: a minimum of 160 ft-lb
  • 3/4” bolts: a minimum of 210 ft-lb

By following these steps, you can successfully adjust the pin box of your 5th-wheel camper to ensure a level and safe towing experience. Remember to always prioritize safety and follow the recommended procedures to avoid any potential hazards.

Frequently asked questions

There are several ways to lift your 5th-wheel camper without buying a new truck. You can adjust the pin box, cut off the hangers and install taller ones, or use an Over-Under Conversion kit, also known as "flipping the axles" by moving the springs on top of the axle.

The cheapest way to lift your 5th-wheel camper is to "flip the axles", which involves moving the suspension springs from the bottom of the axles to the top. This can be done for a very low cost, but it will only lift the trailer by 3-4 inches.

The safest way to lift your 5th-wheel camper is to have a subframe built under the trailer. This method involves cutting off the existing 12" I-beams and welding a rectangular box frame to fit under them. This option is more expensive, but it will provide a stronger trailer frame and can give you up to 8" of lift.

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