Crankcase breather filter with part number 2735711 from the REDX offer. It is a specialized canister filter used in Caterpillar (CAT) machines equipped with C4.4, C6.6, and C7.1 series engines. Its task is to separate oil mist from blow-by gases, which protects the intake system from contamination and ensures compliance with environmental standards.
REDX breather filters effectively capture oil particles from gases escaping from the crankcase. This prevents oiling of the turbocharger and intercooler, which is crucial for maintaining the efficiency of EGR-equipped engines.
| Category | Models |
|---|---|
| Wheeled Excavators | M313D, M315D, M315D2, M316D, M317, M317D2, M318, M318D, M318D MH, M320, M320D2, M322D, M322D MH, M322D2, M322D2 MH, M324D2 MH |
| Wheel Loaders | 910K, 914, 914G, 914G2, 914K, 920, 920K, 924, 924H, 924HZ, 924K, 926, 928H, 928HZ, 930, 930H, 930K, 938, 938H, 938K, 950L, 950M, 962, 962L, 962M |
| Track-Type Tractors | D6K LGP, D6K XL, D6N |
| Track Loaders | 953D, 963D |
| Toolcarriers | IT14G, IT14G2, IT38H |
| Compactors | 814, 814K, 815, 815K, 816, 816K |
| Other Applications | Generators (LC30XX, C7.1 POWER SYS), Motor Graders (120M), Forestry (559), Marine (C6.6) |
| Engines | C4.4, C6.6, C7.1 |
Filter is compatible with C4.4 and C6.6 engines. Before purchase check thread (M22x1.5) and dimensions.
The breather filter is part of the lubrication/ventilation system. When replacing it, it is worth checking the condition of engine oil filters and air filters to ensure comprehensive engine protection.
A clogged breather filter causes pressure buildup in the engine crankcase. This can lead to oil leaks through seals (e.g., crankshaft seals) and increased oil consumption. Regular replacement of this filter is often overlooked but is crucial for engine tightness.
Filter 2735711 vents the crankcase and separates oil.
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"Blow-by" are combustion gases that escape from the combustion chamber past the piston rings into the crankcase. They must be vented (via the breather), and the breather filter cleans them of oil mist before re-introduction into the intake or atmosphere.
The 177 mm height results from the need to provide a large surface area of coalescing material. A filter that is too small would quickly become saturated with oil, blocking gas flow and causing pressure buildup.
In older engines, the breather was simply a tube vented under the engine ("open breather"), dripping oil onto the ground. Modern systems with filters like 2735711 (closed CCV) are a requirement of emission standards to prevent oil from entering the environment.
Do you have doubts or need confirmation to avoid costly downtime? Call us. Our experts will help you select the right part to get your equipment back to work as quickly as possible.
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Filter suitable for CAT

















