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Eaton S-3204 Inertia Brake Air Line Assembly | Endurant HD OEM
Eaton S-3204 / EAHDS-3204 Inertia Brake Air Line Assembly for Endurant HD transmissions. Pre-assembled air supply line with fittings, tubing, clip & ties. Direct OEM replacement for clutch housing service. Global shipping & lifetime warranty. Get your quote today!
Product Details
Eaton S-3204 Inertia Brake Air Line Assembly – Endurant HD OEM
Factory-direct OEM replacement part for Eaton Cummins Endurant HD automated transmissions. The S-3204 (also referenced as EAHDS-3204) is the complete pre-assembled Inertia Brake Air Line Assembly, supplying pressurized air to the inertia brake piston for controlled braking during shifts. Essential for maintaining proper inertia brake function, preventing shift delays, and ensuring smooth automated operation in high-mileage heavy-duty applications.
Why Choose the Eaton S-3204 Inertia Brake Air Line Assembly?
- Complete pre-assembled OEM unit – ready for direct installation
- Includes black air tubing, seal clip, TY-RAP ties, swivel & straight fittings
- Restores a reliable air supply to the inertia brake piston
- Direct fit for all Endurant HD clutch housing configurations
- Prevents air leaks, contamination, or pressure loss issues
- 28 years of OEM-level manufacturing experience at Volgen Power
Technical Specifications – Complete Assembly Contents
| Item # | Description | Part Number | Qty |
|---|---|---|---|
| 1 | Inertia Brake Air Line Assembly (NSS) | S-3204 / EAHDS-3204 | 1 |
| 1.1 | Air Tubing (Black) | 10001241 | 1 |
| 1.2 | Seal Clip | 4306219 | 1 |
| 1.3 | TY-RAP Cable Ties | 5559348 | 2 |
| – | Inertia Brake Air Line Swivel Fitting (Elbow, M10 x 1) | 10001240 | 1 |
| – | Inertia Brake Air Line Straight Fitting (M10 x 1) | 10001239 | 1 |
Assembly Weight: Approx. 0.5 lbs (0.23 kg) • Note: Not Sold Separately (NSS) components; full assembly recommended for leak-free performance.
Vehicle & Transmission Compatibility
Designed exclusively for Eaton Endurant HD Series:
| Transmission Models | Application Notes |
|---|---|
| EEO-17F112C / EEO-17F112C-XD | 17-speed Endurant HD |
| EEO-18F112C | 18-speed Endurant HD |
Popular Applications: Freightliner Cascadia, Peterbilt 579/567, Kenworth T680, International LT – paired with Cummins X15 engines.
Important Compatibility Note: This S-3204 Air Line Assembly mounts to the clutch housing and connects to the inertia brake housing (10004216 or A-10004579). Compatible with both Non-Hard Lock (pre-2023) and Hard Lock designs. Replace during inertia brake service, clutch housing kit installation (K-4358 / K-4653), or if contamination/oil in lines is present.
Installation Highlights
Requires clutch housing access (transmission removal may be needed for full inspection). Disconnect old air line, install new S-3204 assembly with fittings torqued to spec (M10 x 1 fittings), secure with TY-RAP ties and clip. Check for leaks and perform an air system pressure test. Total service time: 1–2 hours (as part of larger repair). Reference Eaton Endurant HD Service Manual TRSM0950 for detailed procedure, including inertia brake air supply checks.
Why Buy from Volgen Power?
- 100% genuine OEM specification – direct from the Eaton Cummins supply chain
- Factory direct pricing – up to 40% lower than dealerships
- Lifetime warranty on all transmission components
- Fast global shipping from China + USA warehouse stock
- Trusted by fleets in 70+ countries since 1996
- Full technical support & air system diagnostic guidance
Frequently Asked Questions
What is included in the Eaton S-3204 assembly?
Full pre-assembled unit: black air tubing (10001241), seal clip (4306219), TY-RAP ties (5559348 x2), swivel elbow fitting (10001240), and straight fitting (10001239). All NSS components.
Why replace the inertia brake air line?
Common issues: oil contamination, leaks, cracks, or degraded tubing causing low pressure, slow inertia brake engagement, or shift problems. Often found during MTM/inertia brake service.
Is S-3204 compatible with Hard Lock inertia brake upgrades?
Yes – works with both original (10004216) and Hard Lock (A-10004579) inertia brake housings. Pairs perfectly with clutch housing kits K-4358 / K-4653.
Do fittings come included?
Yes – swivel (10001240) and straight (10001239) M10 x 1 fittings are integrated/pre-assembled in the S-3204 unit.
What is your warranty on this part?
Lifetime warranty against manufacturing defects when installed correctly.
Need inertia brake service parts?
VIEW K-4350 INERTIA BRAKE KIT →
Volgen Power – Shiyan, China • 28 Years • OEM Quality • Global Delivery
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