1. Important Safety Information
Read and understand all instructions and warnings before installing or using this weight distribution hitch. Failure to follow these instructions can result in serious injury or property damage.
- Maximum Capacity: Do not exceed the hitch's maximum capacity of 11,500 lbs Gross Trailer Weight (GTW) and 1,150 lbs Tongue Weight (TW). Always refer to your vehicle and trailer manufacturer's towing capacities.
- Proper Installation: Ensure all components are correctly installed and securely fastened according to the instructions. Improper installation can lead to loss of control.
- Regular Inspection: Before each tow, inspect all hitch components, including bolts, pins, and spring bars, for wear, damage, or loose connections. Replace any damaged parts immediately.
- Sway Control: This kit includes sway control features. Ensure they are properly adjusted for optimal performance.
- Driving Conditions: Adjust driving speed and style to suit road and weather conditions. Weight distribution hitches improve stability but do not eliminate all risks.
2. Product Components
The MaxxHaul 51191 Weight Distribution Hitch system includes the following main components:
- Weight Distribution Head with preinstalled 2-5/16 inch hitch ball
- 8.5 inch Deep-Drop Steel Shank
- Tapered Steel Spring Bars (2)
- Frame-Mounted Control Brackets (2)
- High-Torque Lift-Assist Bar
- Hitch Pin and Clip (5/8 inch)
- All necessary mounting hardware
Figure 2.1: Key Components of the Weight Distribution Hitch. This image illustrates the main parts of the MaxxHaul 51191 system, including the deep-drop shank, spring bars, hitch ball, and control brackets, highlighting its complete load-leveling design.
3. Setup and Installation
This section outlines the general steps for installing your MaxxHaul 51191 Weight Distribution Hitch. For detailed, step-by-step instructions, refer to the included printed manual.
- Prepare Vehicle and Trailer: Park the tow vehicle and trailer on a level surface. Ensure the trailer is loaded as it would be for travel.
- Install Deep-Drop Shank: Insert the 8.5 inch deep-drop shank into your vehicle's receiver hitch. Secure it with the provided 5/8 inch hitch pin and clip. This shank is designed to accommodate taller trucks.
- Attach Weight Distribution Head: Slide the weight distribution head onto the shank. Adjust its height to ensure the trailer is level or slightly nose-down when connected. Secure the head to the shank using the appropriate bolts and nuts. The 2-5/16 inch hitch ball is preinstalled on the head.
- Connect Trailer: Lower the trailer coupler onto the hitch ball and secure it.
- Install Frame-Mounted Control Brackets: Position the clamp-on control brackets on the trailer frame. These brackets are designed to fit trailer frames up to 7 inches wide and require no drilling. Ensure they are equidistant from the coupler and at the correct height for the spring bars.
- Attach Spring Bars: Insert the tapered steel spring bars into the weight distribution head. Lift the spring bars and attach them to the frame-mounted control brackets using the high-torque lift-assist bar. This process distributes the tongue weight.
- Final Adjustments: Verify that the vehicle and trailer are level. Adjust the spring bar tension as needed to achieve proper weight distribution. Consult your vehicle and trailer manuals for recommended weight distribution settings.
Figure 3.1: Easy, No-Drill Installation. This image demonstrates the installation process, featuring the 8.5 inch deep-drop shank suitable for lifted trucks and the clamp-on brackets that fit up to 7 inch trailer frames. An installation pry bar is shown for leverage.
Figure 3.2: Ready to Tow Components. This image details the 2-5/16 inch hitch ball, 5/8 inch hitch pin, and clip, which are included for immediate towing capability.
4. Operating Instructions
Once installed, the MaxxHaul 51191 Weight Distribution Hitch helps to distribute the trailer's tongue weight evenly across the tow vehicle's axles, improving stability and ride comfort.
- Weight Distribution: The tapered spring bars maintain constant weight distribution, reducing sag at the rear of the tow vehicle and lifting the front, which helps restore steering and braking control.
- Sway Control: The integrated design of the hitch, including the frame-mounted control brackets, assists in minimizing trailer sway, particularly on highways and in crosswinds.
- Driving: Drive cautiously, especially when first using the system. Avoid sudden maneuvers, and allow for increased stopping distances.
- Disconnecting: To disconnect the trailer, relieve tension on the spring bars using the lift-assist bar before uncoupling the trailer from the hitch ball.
Figure 4.1: Heavy-Duty Steel Build in Operation. This image highlights the high-strength steel head and welded hitch bar with tapered spring bars, which work together to maintain constant weight distribution for a smoother, safer ride.
5. Maintenance
Regular maintenance ensures the longevity and safe operation of your MaxxHaul 51191 Weight Distribution Hitch.
- Lubrication: Periodically lubricate the hitch ball and the points where the spring bars connect to the head and brackets. Use a good quality grease.
- Cleaning: Keep all components clean from dirt, mud, and road salt.
- Inspection: Before and after each trip, inspect all bolts, pins, and connections for tightness. Check spring bars and brackets for any signs of wear, cracks, or deformation.
- Corrosion Protection: The hitch features a durable powder-coat finish designed to resist corrosion. However, regular cleaning and touch-ups of any chipped areas can further extend its life, especially in harsh weather conditions.
Figure 5.1: Long-Lasting Protection. This image illustrates the durable powder-coat finish that resists corrosion, ensuring lasting performance in all weather conditions. It also shows key components designed for durability, such as tapered spring bars and anti-rust screws.
6. Troubleshooting
If you encounter issues with your weight distribution hitch, consider the following common problems and solutions:
- Trailer Still Sags:
- Ensure the spring bars are properly tensioned. You may need to increase the tension by adjusting the chain links on the control brackets.
- Verify that the hitch head is set at the correct height.
- Check that the trailer tongue weight does not exceed the hitch's capacity.
- Excessive Trailer Sway:
- Confirm that the spring bars are correctly installed and tensioned.
- Ensure the trailer load is balanced, with heavier items positioned over the trailer axles.
- Inspect all connections for looseness.
- Noisy Operation:
- Lubricate the hitch ball and the points where the spring bars connect to the head and brackets.
- Check for any loose components that might be rattling.
If problems persist, consult a qualified technician or contact customer support.
7. Specifications
Key specifications for the MaxxHaul 51191 Weight Distribution Hitch:
| Feature | Specification |
|---|---|
| Model Number | 51191 |
| Brand | MAXXHAUL |
| Maximum Gross Trailer Weight (GTW) | 11,500 lbs |
| Maximum Tongue Weight (TW) | 1,150 lbs |
| Hitch Ball Size | 2-5/16 inches (preinstalled) |
| Shank Type | 8.5 inch Deep-Drop Solid Steel |
| Trailer Frame Compatibility | Up to 7 inches wide (clamp-on brackets) |
| Finish | Powder Coated |
| Included Components | Weight Distribution Hitch, 2-5/16" Hitch Ball, 5/8" Hitch Pin & Clip, Lift-Assist Bar |
Figure 7.1: Product Dimensions. This diagram provides specific measurements for the hitch head, shank, spring bars, and brackets, along with the maximum tongue weight capacity.
8. Warranty and Support
Manufacturer Warranty: This MaxxHaul product is covered by a 90-day manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For warranty claims or technical support, please refer to the contact information provided with your purchase documentation or visit the official MAXXHAUL website. Please have your model number (51191) and proof of purchase ready when contacting support.