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(888) 312-8812 Login SignupOvernight ride-height loss without an audible fitting leak can come from the Firestone Suspension Air Spring releasing air slowly through the bellows wall. The Firestone W013589640 uses reinforced rubber bellows construction built to hold pressure through the suspension travel the application sees. A pinhole leak at the bellows wall releases air slowly enough that the compressor may cycle more often without ever triggering an obvious fault code. Checking ride height after extended parking, rather than relying on listening for a leak, catches that kind of slow bellows failure before it worsens.
| Order Number: | W01-358-9640 |
| Bellows #: | 1T15MT-3 |
| Assembly Weight: | 14.2 lbs |
| Design Height: | 9-10.25 inches |
| Minimum Jounce Height: | 5.5 inches |
| Maximum Rebound Height: | 15.73 inches |
| Loading Capacity at 20 psig: | 1,490 lbsf |
| Loading Capacity at 60 psig: | 4,470 lbsf |
| Loading Capacity at 90 psig: | 6,705 lbsf |
| Natural Frequency: | Hz |
| Maximum Diameter: | 12.5 inches |
| Material Type: | N/A |
| Operating Temperature: | 57Cº to-54Cº |
| Remarks: | |
| TR: B-8619 |
| Brand | Part Number |
|---|---|
| W014559630, 566243091, 6388, FIW013589640 | |
| CONTITECH | 91012A427, AS9640, 64395 |
| DAYTON PARTS | 452-9640L |
| FIRESTONE | 1T15MT3, 1T15M-3, 1T15MT-3 |
| GOODYEAR | 1R12-367, 1R12367 |
| GOODYEAR BELLOWS | 566-24-3-076 |
| GOODYEAR PART | 1R12-367 |
| HD VALUE | HDV9640, HDV9640 |
| HENDRICKSON | C20223, S20223, S-20223 |
| MERITOR | FS9640, MAF9640 |
| PISTON | 9702 |
| TOP PLATE | 3242 |
| TORQUE PARTS | TR9640 |
| TRIANGLE | 8427 |
| TRIANGLE BELLOWS | 6388 |
| TRIANGLE PART | 8427 |
| TRIANGLE SUSPENSION | AS-8427 |
| WORLD AMERICAN | WA01-9640C |
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Headquartered in Nashville, Tennessee, Firestone Industrial Products® is a proud manufacturer of air spring and other anti-vibration solutions to heavy duty trucks, trailers, commercial vehicles, rail cars, and industrial equipment. It has come a long way since it revolutionized transportation with the introduction of the Airide™ Air Spring in 1938. Today, Firestone is more than just an air spring manufacturer—it’s a global leader and a local partner that sees solutions where others see obstacles. Both OEMs and everyday consumers trust this brand for their air suspension needs because of its unwavering commitment to quality and reliability. All Firestone parts are engineered and tested in ISO-certified facilities to ensure they meet the strictest standards and customer specifications.
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