In the heavy-duty engine world, precision is the key to longevity. If you are searching for a high-quality 2705320 or 3435527 oil cup (also referred to as 270-5320 or 343-5527), you are in the right place. These components are essential for the lubrication and breather systems of the legendary CAT 3406 series engines, commonly used in mining excavators like the 375 and heavy-lift shovels like the 5080.
Connect with our technical support for immediate stock verification:
WhatsApp: +86 13532379052 Email: [email protected]| Detail Field | Specifications Info |
|---|---|
| Model NO. | CAT 3406 / 3406B / 3406C / 375 / 5080 |
| Product Name | Engine Oil Cup / Breather Cup Assembly |
| Part Number | 2705320 (270-5320) / 3435527 (343-5527) |
| Condition | Brand New, OEM Standard Replacement |
| Application | Engine rebuild, overhaul, maintenance |
| Payment Terms | T/T, Western Union, MoneyGram |
| Delivery Methods | DHL, Fedex, EMS, UPS, Air/Sea Freight |
| MOQ | 1 Piece |
| Stock Status | In Stock / Fast Dispatch |
| Packaging | Industrial Export Packing |
Choosing between an original part and a replacement can be difficult. Our CAT 2705320 replacement is designed to match the exact thermal expansion properties required for high-heat environments in 3406 engines.
| Feature | Our OEM Standard Replacement | Typical Market Aftermarket |
|---|---|---|
| Material Grade | High-strength fatigue resistant alloy | Recycled casting material |
| Fitment Precision | 1:1 match with 3435527 engineering specs | Loose tolerances (leaking risk) |
| Corrosion Resistance | Anti-oxidative coating applied | No surface treatment |
| Service Life | 8,000+ Operating Hours | Unpredictable failure rate |
| Cost Efficiency | High ROI (Quality vs Price) | Cheap initially, expensive repairs |
| Warranty Support | Full technical backing provided | No after-sales support |
A: Leaks are usually caused by hardened seals or thermal cracking of the cup body. For the CAT 3406B/C models, excessive crankcase pressure can also stress the 3435527 assembly. We recommend checking the breather filter alongside replacing the cup to ensure the system is depressurized correctly.
A: Check your engine serial number prefix. The 2705320 and 3435527 are widely used in 3406E and 3406C industrial applications. If your machine is a CAT 375 or 5080, these part numbers are the standard configuration for the oil venting system.
A: Our parts utilize an OEM-standard tri-metal structure where applicable and are Trusted by repair shops & equipment fleets globally for their resilience in extreme mining environments.
Not sure how this issue affects your equipment? Maintenance delays can lead to catastrophic engine failure. Our team helps operators:
Identify potential risks during routine maintenance checks.
Recommend suitable replacement parts based on your specific engine wear patterns.
Support both inspection advice and high-quality parts supply for long-term reliability.
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