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The AF27722 Primary Air Filter (K3251) is a high-capacity, heavy-duty air filtration element engineered to deliver maximum contaminant removal for SINOTRUK Howo heavy-duty trucks. As a trusted supplier of genuine Sinotruk howo parts, we offer this primary air filter as a direct OEM replacement, manufactured to the exacting standards of the original equipment. The AF27722 filter features a high-efficiency multi-layer pleated paper media with an integrated micro-glass fiber layer, rugged metal end caps with a durable anti-corrosion finish, and a precision-molded nitrile rubber gasket that ensures a perfect seal, providing superior filtration efficiency, extended dust-holding capacity, and reliable protection for the engine’s combustion air system under the extreme dust, dirt, and vibration conditions typical of heavy-duty trucking operations.
This AF27722 primary air filter is the first line of defense against abrasive particles, preventing premature engine wear, turbocharger damage, and reduced fuel efficiency. Its advanced media design captures contaminants down to sub-micron levels while maintaining low restriction, ensuring optimal air flow for combustion and maximizing engine performance.
OEM direct replacement • High-efficiency multi-layer media • K3251 specification • Robust metal end caps
The AF27722 is a primary air filter designed to provide the first stage of combustion air filtration for SINOTRUK Howo heavy-duty trucks. It is installed in the main air intake system, upstream of the turbocharger and engine, to remove dust, dirt, pollen, and other airborne contaminants from the incoming air.
This filter, conforming to the K3251 specification, utilizes a deep-pleated, high-density cellulose media with an embedded micro-glass fiber layer. The pleated design provides a large filtration surface area, allowing high dust-holding capacity and low initial restriction. The micro-glass fiber layer enhances the capture of fine particles, ensuring that even sub-micron contaminants are removed from the air stream.
The filter is constructed with heavy-duty steel end caps that are precision-stamped and securely bonded to the media. The end caps are coated with a corrosion-resistant finish to withstand moisture and chemical attack. A molded nitrile rubber gasket on the sealing face ensures a tight, leak-proof fit in the air filter housing, preventing unfiltered air from bypassing the media. The AF27722 is engineered to operate effectively in temperatures ranging from -40°C to +120°C, making it suitable for all climate conditions.
This primary air filter is a direct OEM replacement, providing identical dimensions, filtration efficiency, and airflow characteristics as the original. Its high-quality construction and reliable performance make it essential for protecting the engine from abrasive wear and maintaining optimal combustion efficiency.
The AF27722 primary air filter is specifically designed for SINOTRUK Howo heavy-duty trucks, including popular models such as Howo A7, T7H, and other series that utilize the K3251 filter specification in their engine air intake systems. It is a direct replacement for the OEM filter, offering identical dimensions, filtration performance, and airflow characteristics.
This filter is installed in the main air cleaner housing and is the primary protection for the engine, turbocharger, and intercooler. It is suitable for a wide range of applications, including long-haul transport, regional distribution, construction, mining, and off-road operations, where high dust loads and extreme operating conditions demand superior filtration.
The AF27722 is also compatible with many aftermarket air filter housings that accept the K3251 cartridge. Always verify the housing dimensions and sealing surface before installation to ensure proper fit.
When replacing, inspect the air filter housing for damage, and clean the interior to remove any accumulated debris before installing the new filter.
Installing the AF27722 primary air filter is a straightforward procedure that can be performed with basic hand tools. Before starting, ensure the engine is off and cool, and the air intake system is free of debris.
Open the air cleaner housing by releasing the retaining clips or removing the cover bolts. Carefully lift out the old filter element, being cautious not to dislodge accumulated dust into the clean air outlet. Clean the inside of the housing using a damp cloth and vacuum, removing all dirt and debris.
Insert the new AF27722 filter into the housing, ensuring the sealing gasket is properly seated against the sealing surface. Verify that the filter is oriented correctly (if directional arrows are present). Reinstall the cover or retaining ring, tightening fasteners evenly to the manufacturer’s torque specification.
After installation, start the engine and check for any air leaks around the filter housing. Monitor the air filter restriction indicator (if equipped) to determine when replacement is needed.
Regular maintenance includes replacing the AF27722 filter at recommended intervals (typically every 30,000 to 50,000 km, or more frequently in severe dusty conditions). Also, inspect the housing and sealing surfaces for damage, and replace any worn components during each filter change.
The AF27722 primary air filter is manufactured in an ISO 9001-certified facility under strict quality control standards. Each filter is produced using premium materials and undergoes comprehensive testing to ensure it meets or exceeds OEM specifications for efficiency, capacity, and durability.
The filter media is tested for burst strength, pleat stability, and filtration efficiency using standardized test methods (ISO 5011). The end caps and sealing gasket are inspected for dimensional accuracy and material integrity to guarantee a leak-free installation and long service life.
Our commitment to quality ensures that the AF27722 delivers reliable, consistent engine protection, reducing the risk of premature wear, turbocharger damage, and unscheduled downtime. With a comprehensive warranty, this filter offers peace of mind for fleet operators and owner-operators alike.
Choose genuine quality for your engine air intake – choose the AF27722.
The AF27722 primary air filter is a fundamental component that directly affects the performance, fuel efficiency, and longevity of your SINOTRUK Howo truck’s engine. Its advanced filtration media, robust construction, and precise sealing provide superior protection against abrasive particles, ensuring clean air enters the combustion chamber.
By choosing this OEM-grade filter, you avoid the risks associated with inferior aftermarket alternatives, such as poor filtration, premature clogging, and seal bypass. The AF27722 is engineered to deliver consistent, reliable performance, reducing engine wear, maintaining power output, and lowering operating costs.
Fleet operators will benefit from extended engine life, reduced maintenance intervals, and improved fuel economy. Owner-operators will gain confidence in their vehicle’s reliability, knowing that critical engine protection is handled by a genuine part.
Invest in the AF27722 Primary Air Filter and experience the difference that a genuine SINOTRUK Howo part makes. Its proven reliability and engineering excellence make it the smart choice for professionals who demand the best for their vehicles.
Order your AF27722 today and ensure your truck’s engine receives clean air for maximum performance and durability.
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