Boost the stability and durability of your air suspension system with the Fortpro 50389 Main Support, designed specifically for the Hendrickson HAS 400, 402, and 460 series. This main support accurately replaces parts 56946-000, 4QK4150M, and 750152, providing a robust and reliable structural support that improves load distribution and absorbs the harshest impacts. Manufactured from high-strength steel and an anti-corrosion coating, the Fortpro 50389 ensures exceptional durability, ensuring your truck stays aligned and running at peak performance at all times. Installation is quick and easy, allowing you to get back on the road with confidence and security.
Fortpro is a trusted leader in the development and manufacturing of premium-quality truck parts designed to meet the demands of semi-trucks and heavy-duty trucks. Renowned for innovation, durability, and reliability, Fortpro products are engineered to enhance performance, safety, and efficiency across a wide range of trucking applications.
Whether you're seeking OEM replacement parts or upgrades, Fortpro provides a diverse selection of components backed by a global reputation for quality and innovation. Trust Fortpro for the parts you need to keep your vehicles on the road longer and stronger.
Basic Part Information5 attributes
| Product Line | Suspension |
|---|---|
| Category Name | Chassis & Suspension |
| Part Type | Main Support Spring |
| Alternate Part Name | Main Support Member, Main Support Spring, Main Support, Single Leaf, Z-Spring |
| OEM Part Number | 56946-000 |
Application/Fitment Attributes2 attributes
| Application Type | Heavy Duty Trucks, Semi-Trucks |
|---|---|
| Mounting Position | Rear Suspension |
Dimensional/Physical Attributes6 attributes
| Material | Steel |
|---|---|
| Front Arch Height | 2-5/8 in. |
| Leaf Width | 3 in. |
| Length (A) | 24 in. |
| Length (B) | 19-7/8 in. |
| Rear Arch Height | 11-1/2 in. |
Technical/Performance Attributes1 attribute
| Spring Load Capacity | 23.000 lb. |
|---|
Packaging / Logistics Attributes:1 attribute
| Net Weight | 63.35 lb. |
|---|
Intended Application
- Compatible with Hendrickson HAS 400, HAS 402, and HAS 460 rear air ride suspension systems; intended for rear axle suspension applications utilizing HAS-series main support member configurations within heavy-duty truck air ride suspension assemblies.
- Always compare with your OEM part number prior to purchase to confirm full compatibility.
- Dayton Parts: 50-389, 50389
- Hendrickson: 56946-000, 56946000, 56946
- Mack: 4QK4150M
- PAI: 750152
