Description
The World American WA01-9373C is a premium aftermarket rolling lobe air spring engineered for Hendrickson HAS series drive axle suspensions on Class 8 trucks. This air spring features a steel-reinforced composite bottom plate and dual top-plate mounting design, providing smooth ride control and load handling up to 7,000 lbs at 100 PSI for heavy-duty vocational and over-the-road applications.
Signs You Need a New Air Spring
- Visible cracks, dry rot, or deterioration in the rubber bellows
- Truck sitting lower than normal or uneven side-to-side ride height
- Air leaks or hissing sounds from the suspension system
- Excessive bouncing, harsh ride, or reduced stability under load
Specifications
| Manufacturer | World American |
|---|---|
| Part Number | WA01-9373C |
| Part Type | Air Spring – Rolling Lobe |
| Extended Height | 22.90″ |
| Compressed Height | 7.60″ |
| Design Height | 12.00″ |
| Top Plate Diameter | 9.00″ |
| Top Plate Center-to-Center | 6.20″ |
| Bottom Plate Diameter | 10.00″ |
| Bottom Plate Center-to-Center | 2.25″ |
| Maximum Diameter | 12.60″ |
| Top Plate Holes | 2 |
| Bottom Plate Holes | 1 |
| Bottom Plate Alignment | Parallel |
| Load Rating @ 80 PSI | 5,570 lbs |
| Load Rating @ 100 PSI | 7,000 lbs |
| Natural Frequency | 60 Hz |
| Firestone Bellows Number | 1T15MT-8 |
| Firestone Top Plate | 3313 |
| Firestone Piston | 9538 |
| Warranty | 1 Year / 100,000 Miles |
Cross References
This part replaces or is equivalent to the following part numbers:
- Firestone: W01-358-9373, 9373
- Hendrickson: 57122-1, 57122-2, 57122-001, 57122-002, S-23358
- Goodyear: 1R12-403, 1S12-030
- ContiTech: 9 10-17.5 P 519, 9 10-17.5 P 440, 64265
- Triangle: 8440, AS-8440
- Automann: AB1DK23M-9373
- Watson & Chalin: AS-0127-G
- Dayton: 352-9373
- Meritor: FS9373
- PACCAR: AS93730
- International: 2992101C1
Applications
This rolling lobe air spring fits the following suspensions and vehicles:
- Hendrickson HAS-360, HAS-400, HAS-402, HAS-460 drive axle suspensions
- Mack AL-361, AL-401, AL-461 air suspensions
- Ford Class 8 trucks with Hendrickson suspensions
- Kenworth, Peterbilt, Freightliner, International, and Mack trucks
- Heavy-duty vocational and over-the-road applications
Verify OEM part number and vehicle application before ordering to confirm fitment. Air springs must be matched by dimensions and mounting configuration.
