The Neway AD246 is a popular air-ride suspension system found on many heavy-duty trailers, especially those used in over-the-road trucking. Designed for durability and load leveling, the AD246 series delivers a smooth ride and protects cargo. However, like any mechanical system, components wear out over time. Knowing which Neway AD246 suspension parts to replace and when can save you downtime and extend the life of your trailer. This guide covers the critical parts, how to spot failure, and what to consider when buying replacements.
Understanding the Neway AD246 Suspension System
The AD246 is a trailing arm air suspension with a design that uses air springs instead of traditional leaf springs. This allows the ride height to be adjusted automatically based on load, improving stability and reducing stress on the chassis. The system is known for its robustness, but daily use, road salt, and heavy loads eventually take a toll on components.
Key Components and Their Functions
- Air Springs (Air Bags): These rubber bellows support the trailer weight and provide cushioning. They compress and expand with air pressure changes.
- Shock Absorbers: Dampen oscillations from the air springs to prevent excessive bouncing.
- Height Control Valves (Leveling Valves): Regulate air pressure to maintain a consistent ride height regardless of load.
- Bushings: Found at pivot points (trailing arm to hanger, shock mounts) – they allow smooth articulation and absorb vibrations.
- Axle Hardware: U-bolts, spacers, and brackets that secure the axle to the suspension.
Common Signs of Wear and Failure
Look for these indicators that Neway AD246 suspension parts need attention:
- Vehicle leans or sags on one side (air leak or failed height control valve).
- Excessive bouncing or harsh ride (worn shocks or low air pressure).
- Clunking or creaking noises from underneath (bushings worn out).
- Uneven tire wear (suspension misalignment due to worn bushings or bent hardware).
- Visible cracks or damage on air springs.
Essential Neway AD246 Suspension Parts
When it’s time to replace components, you’ll encounter a range of part types. Each has a specific role and replacement interval.
Air Springs (Air Bags)
Air springs are the heart of the AD246 system. They are typically double convoluted and made from reinforced rubber. Common failure modes include sidewall cracks, punctures, and separation from the bead plate. OEM Neway air springs for the AD246 often have part numbers like 9080-40A (replaces 9080-40) or 9080-49A. Aftermarket alternatives from brands like Firestone or Goodyear may also fit, but always verify dimensions (height, diameter, mounting style). Replace air springs in pairs or full sets to maintain even ride height.
Shock Absorbers
Shocks control rebound and compression damping. On the AD246, shocks are usually mounted between the frame bracket and the trailing arm. Worn shocks allow the suspension to oscillate, leading to poor handling and accelerated tire wear. Always replace shocks as a set (both sides per axle). Part numbers like Neway 101250-01 are common, but cross-reference with your specific configuration.
Height Control Valves (Leveling Valves)
These valves manage air flow into the air springs. They have a linkage that connects to the axle or trailing arm. If your trailer doesn’t return to the same ride height after loading, or if it dumps air while parked, the height control valve may be stuck or leaking. The AD246 often uses a single valve per axle, but some configurations have two. Replace with OEM Neway valves (part number 107820-01) or high-quality aftermarket equivalents. Adjust the linkage according to the manufacturer’s specs after installation.
Bushing Kits and Pivot Bushings
Bushings are often overlooked until they cause noise or misalignment. The AD246 has bushings at the trailing arm pivot point (where the arm attaches to the hanger), shock mounts, and anti-roll bar mounts (if equipped). Worn bushings cause slack in the suspension, leading to axle walk and tire wear. Full bushing kits (e.g., Neway 517200-01) include all necessary polyurethane or rubber bushings, sleeves, and hardware. Polyurethane bushings offer longer life and less deflection, but they can transmit more road noise.
Axle Hardware and U-Bolts
U-bolts clamp the axle to the trailing arm. Over time, they can stretch, corrode, or break. Loose u-bolts cause axle slippage and misalignment. Always replace u-bolts in sets and torque to spec. Use grade 8 hardware for strength. Neway offers replacement u-bolt kits with matching nuts and washers. Also check axle spacers and guide brackets for wear.
How to Select the Right Replacement Parts
Choosing the right Neway AD246 suspension parts requires careful attention to your trailer’s specific configuration. The AD246 was used across many trailer brands, and slight variations exist.
OEM vs. Aftermarket Considerations
OEM Neway parts guarantee fit and performance, but they often cost more. Aftermarket components from reputable manufacturers can be just as reliable if they meet OEM specifications. When going aftermarket, look for parts that are SAE or TMC compliant. Avoid generic no-name parts that may have poor rubber quality or incorrect dimensions.
Part Numbers and Cross-Referencing
Find the original part number stamped on the component. For air springs, look for a molded label. For the height control valve, check the casting. Use these numbers to search cross-reference guides from suppliers. Many heavy-duty truck parts websites have lookup tools by make, model, and part number. If you can’t find the number, measure the component: air spring height (3-8 inches typical for AD246), mounting bolt centers, shock eyelet size, and bushing inner diameter.
Where to Buy
Purchase from established heavy-duty truck parts dealers, trailer service centers, or online retailers specializing in suspension components. Always confirm the part matches your AD246 variant (standard duty vs. heavy duty, axle capacity, ride height). If in doubt, consult a trailer mechanic.
Maintenance Tips for Longevity
Extend the life of your Neway AD246 suspension parts with these practices:
- Check air pressure in the system monthly. Leaks are common at fittings and air lines.
- Inspect air springs for cracks or abrasion, especially after harsh winters.
- Lubricate bushings and pivot points per the manufacturer’s schedule (some are self-lubricating, others need grease).
- Tighten u-bolts after the first 500 miles of service on new parts.
- Clean height control valve linkages to prevent binding.
- Replace shocks every 50,000-75,000 miles or if they show oil leakage.
Final Recommendation
For most trailer owners, replacing Neway AD246 suspension parts proactively before complete failure is more cost-effective than emergency repairs. Focus on air springs and shocks every 100,000 miles, bushings every 150,000 miles, and height control valves when symptoms arise. Always use matched components, especially on the same axle. When in doubt, buy OEM Neway parts for critical safety items like height control valves and air springs. For shocks and bushings, high-quality aftermarket brands can provide similar performance at a lower price. Keep a spare set of bushings and a height control valve rebuild kit on hand to minimize downtime. Properly maintained, your AD246 suspension will deliver years of reliable service.