In the world of heavy-duty machinery, engine protection starts with clean fuel. If you are operating CAT 3116 or 3126 engine models, the fuel water separator is your first line of defense against pump wear and injector clogging. We provide high-performance 1129401 and 1174089 (also searched as 112-9401 and 117-4089) filters designed to meet or exceed OEM specifications.
| Attribute | Details |
|---|---|
| Model NO. | CAT 3116, 3126, 3126B Engine Series |
| Product Name | High-Efficiency Fuel Water Separator Element |
| Part Number | 1129401, 1174089 (Alt: 112-9401, 117-4089) |
| Machine Application | CAT 322B, 325B, 322C Excavators, 950F, 950G, 962G Wheel Loaders |
| Condition | Brand New, OEM Standard Replacement |
| Type | Secondary Fuel System Filtration |
| MOQ | 1 Piece |
| Stock Status | In Stock / Fast Worldwide Dispatch |
| Packaging | Industrial Export Grade Packing |
| Payment Terms | T/T, Western Union, MoneyGram |
| Delivery | Express (DHL, Fedex, EMS, UPS) / Air / Sea |
| Core Features | Our Replacement Standard | Standard Aftermarket Parts |
|---|---|---|
| Filtration Efficiency | 99% water removal efficiency for injector safety | Variable quality, often below 85% efficiency |
| Build Quality | Heavy-duty steel casing to prevent high-pressure leaks | Thin casing prone to cracking under vibration |
| Filter Media | Synthetic fiber multi-layer structure | Single-layer cellulose (shorter service life) |
| Seal Integrity | High-temperature resistant Viton/NBR gaskets | Recycled rubber (leaks within 200 hours) |
| Compatibility | Precision 112-9401 and 117-4089 fitment | Universal fit (may cause priming issues) |
| Cost Performance | OEM performance at 40% lower cost | Cheapest price but high engine risk |
Our team of engine specialists helps operators worldwide maintain fleet reliability. When you buy from us, you get more than just a part number; you get professional support:
Identify potential risks during routine maintenance to avoid costly downtime.
Recommend suitable replacement parts based on your specific engine serial number (ESN).
Support both inspection advice and global parts supply chain solutions.
A clogged 1129401 fuel water separator is the most common culprit. When water bypasses the filter, it damages the fuel injectors. We recommend replacing your filter every 500 hours or immediately if the "Water in Fuel" light activates.
While both are used in CAT 3000 series engines, the 117-4089 often features different micron ratings or bowl attachments. Always check your engine's arrangement number. We can verify this for you instantly via WhatsApp.
OEM-standard tri-metal structure: Our filters are built with internal components that resist corrosion from diesel additives. Trusted by repair shops & equipment fleets: We supply professional workshops across Asia, Africa, and the Americas.
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