29558328 4-inch filter Allison spare parts

29558328 4-inch filter Allison spare parts

The Allison 29558328 4-inch filter, as a core component of Allison’s original equipment manufacturer (OEM) transmission fluid filtration system, focuses on solving the core needs of transmission hydraulic oil purification and core component protection. It is widely used in the transmission systems of Allison’s entire range of heavy-duty automatic transmissions and various heavy-duty commercial vehicles, engineering and mining machinery. The product strictly adheres to OEM production standards, with comprehensive quality control throughout the entire process, from composite filter media selection, folding and forming, filter element bonding, shell electrophoresis, seal assembly, bypass valve adjustment, and overall differential pressure testing, to filtration efficiency testing, temperature and pressure resistance testing, and dirt holding capacity testing. This prevents filtration failure, oil leakage, and component wear caused by uneven filter media pore size, bonding defects, poor sealing, and bypass valve failure. It accurately intercepts contaminants of 10μm and above, with a filtration efficiency of ≥99.5%. Suitable for complex operating conditions such as heavy loads, high-frequency shifting, oil temperature fluctuations, and severe vibrations, it meets the processing and quality standards of ISO 4572, ISO 16889, GB/T 14041.1, ISO 9001, and CE.

Core Technical Parameters：

– Product Model: Allison 29558328
– Product Material: The filter media is made of imported glass fiber + polyester composite pleated layer; the outer shell is made of carbon steel with electrophoretic coating; the end caps are made of reinforced nylon; the seals are made of nitrile rubber (NBR) which is oil-resistant and high-temperature resistant.
– Filtration performance: Filtration accuracy 10μm (β10≥200, filtration efficiency≥99.5%), initial pressure difference ≤0.03MPa, large dirt holding capacity, effectively intercepting metal particles and rubber debris.
– Operating parameters: Operating temperature -40℃~120℃, maximum operating pressure 1.0MPa, bypass valve opening pressure 0.35±0.05MPa, suitable for ATF transmission fluid conditions.
– Structure type: 4-inch cartridge replaceable filter
– Accuracy parameters: Interface thread accuracy conforms to SAE standard, filter element perpendicularity ≤0.02mm, sealing surface flatness ≤0.01mm, and geometric tolerances IT7 grade.
– Suitable for: Allison 1000/2000/3000/4000 series automatic transmissions, hydraulic oil circuit/return oil filtration for transmissions in heavy-duty trucks, construction machinery, mining machinery, and special vehicles.

We prioritize quality. Our Allison 29558328 4-inch filter undergoes rigorous quality control, including filter media integrity testing, differential pressure testing, pressure resistance testing, sealing performance testing, and dirt holding capacity testing, achieving a 100% factory pass rate. Whether for equipment overhaul and replacement or bulk procurement, this product perfectly matches the original Allison transmission hydraulic system, requiring no additional customization or adjustment. It effectively purifies hydraulic oil, protects core components such as valve bodies, clutches, and gears, preventing jamming, wear, and leakage caused by oil contamination, extending transmission oil change intervals and overall service life. It provides a solid guarantee of oil purification for the long-term stable operation of heavy-duty equipment and is a core preferred component in the Allison parts system’s oil filtration unit.

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