29554236 Conical spring Allison spare parts

29554236 Conical spring Allison spare parts

The 29554236 cone spring is an OE-grade precision elastic component specifically developed for Allison 3000/4000 series heavy-duty automatic transmissions. It is widely used in heavy-duty equipment such as heavy trucks, mining machinery, port equipment, and construction machinery equipped with Allison 3000/4000 series transmissions. It is primarily used in key components such as clutch disengagement mechanisms, valve body and valve core reset mechanisms, and pressure regulation mechanisms, undertaking the core functions of elastic buffering, reset guidance, and pressure compensation.
The 29554236 conical spring features a unique conical tower structure design, distinct from ordinary cylindrical springs. It boasts core advantages such as uniform force distribution, excellent cushioning effect, and small footprint, perfectly fitting the compact installation environment inside the gearbox. This conical spring is factory-specified and requires no additional modification. It precisely addresses industry pain points such as insufficient elasticity, easy deformation, and short service life of traditional springs, ensuring smooth clutch disengagement and precise valve body/core reset. It prevents gearbox malfunctions caused by spring failure, such as shift jerking and unstable pressure, extending the service life of the gearbox’s electronic control and transmission systems, reducing secondary maintenance costs, and meeting the core requirements of modern heavy equipment for elastic components: “high elasticity, fatigue resistance, and long-term stability.”

Core technical parameters:

– Product Model: 29554236
– Material specifications: Main body (65Mn high-strength spring steel, quenched and tempered heat treatment, hardness HRC 42~48), surface treated with oxidation blackening + anti-rust coating.
– Operating temperature: -40℃~180℃
– Elastic and mechanical properties: Wire diameter 3.5mm, taper 1:8, free height 38mm, compression 10~15mm, rated load 8~12kN, elastic modulus 206GPa, fatigue life ≥1 million cycles, elastic recovery rate ≥98%.
– Structural parameters: Top outer diameter 18mm, bottom outer diameter 32mm, effective number of turns 6, end face grinding accuracy ≤0.02mm, tolerance ≤±0.03mm
– Corrosion and wear resistance: Double protection with surface oxidation blackening and anti-rust coating, wear rate ≤0.0005mm/1000 hours
– Compatible Models/Scenarios: Core compatibility with Allison 3000 series (3000HS/3200HS) and 4000 series (4000HS/4500HS) heavy-duty automatic transmissions, widely used in heavy-duty equipment such as heavy trucks, construction machinery, mining equipment, and port equipment. It is compatible with transmission clutch separation mechanisms, valve body and valve core reset mechanisms, pressure regulation mechanisms, and other scenarios. It can directly replace the original factory corresponding model of conical springs, meeting the replacement needs of elastic components during transmission overhaul and routine maintenance. It is suitable for complex working scenarios with heavy loads, high-frequency vibrations, and high levels of oil contamination.
– Service life: Under normal heavy-load conditions, the service life can reach more than 15,000 hours, and the fatigue life is ≥1 million cycles.

The 29554236 cone spring, with its precise original factory fit, superior elasticity and fatigue resistance, and long-lasting durability, has become the core preferred component for the repair and overhaul of clutches and valve body control mechanisms in Allison 3000/4000 series heavy-duty transmissions. We strictly control the entire production process; every product undergoes dimensional accuracy testing, elasticity performance testing, fatigue life testing, and corrosion resistance testing. We also provide comprehensive after-sales support and standardized packaging for bulk purchases, solving various problems customers encounter during procurement and use. Our products are suitable for the bulk use needs of repair shops, transmission overhaul centers, and heavy equipment after-sales service stations, helping heavy equipment transmissions achieve long-term stable and efficient operation.

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