195-30-64212 Tensioning Spring Cylinder Komatsu D375 bulldozer spare parts

The Komatsu D375 tension spring cylinder 195-30-64212 is the “tension core” of the Komatsu D375 series bulldozer chassis track system. Through the elastic extension and contraction of the built-in spring, it adjusts the track tension, buffers the impact load on the track under harsh working conditions such as mining and infrastructure, and absorbs vibration during the movement. It is specially designed for Komatsu D375 series bulldozers (including D375A-2, D375A-5, D375A-6, D375A-8, etc.) and is a key consumable to ensure smooth track movement, prevent track loosening, falling off or excessive wear due to tension failure, and improve construction efficiency.
This product strictly adheres to Komatsu’s original manufacturing standards and is designed according to the track tensioning system specifications of the Komatsu D375 series bulldozer chassis (maximum power 474kW, operating weight 72 tons). It utilizes 40Cr high-strength alloy steel and is equipped with fluororubber sealing components, possessing core advantages such as stable elasticity, impact resistance, corrosion resistance, excellent sealing performance, and convenient installation. The product undergoes multiple processes including precision seamless forging and heat treatment. Its optimized cylindrical structure perfectly fits the track tensioning system mounting position. The built-in springs are precisely calibrated, exhibiting excellent elastic recovery performance. It can be directly installed without modification, effectively avoiding spring cylinder deformation, seal leakage, and elasticity attenuation, reducing equipment downtime losses, extending the overall service life of the track tensioning system, and lowering later maintenance costs. It is widely used in mainstream Komatsu D375 bulldozer applications such as mining stripping, large-scale earthmoving, and infrastructure projects, adapting to various harsh operating environments. Balancing practicality and economy, it is a core component for Komatsu D375 bulldozer chassis track maintenance.

Core technical parameters:

– Product Model: Komatsu D375 Tension Spring Cylinder
-Part number 195-30-64212
– Product Type: Tension Spring Cylinder, Core Component of Chassis Track Tensioning System
– Core materials: The spring sleeve is made of 40Cr high-strength alloy steel; the seals are made of fluororubber (FKM) sealing components; the internal spring is made of 60Si2Mn spring steel.
– Material characteristics: 40Cr steel has a tensile strength ≥1000MPa and a yield strength ≥800MPa; surface hardness HRC45-50; excellent toughness after quenching and tempering, and is not easily deformed or cracked; spring steel has an elastic limit ≥1100MPa and an elastic recovery rate ≥98%, and does not decrease with long-term use.
– Operating parameters: Rated tension force 85-105kN, spring compression stroke 50-70mm, operating temperature range -40℃~120℃, suitable for heavy loads, high and low temperature and other complex working conditions, sealing rating IP67, can effectively resist dust and mud intrusion, suitable for the track tensioning requirements of D375 series 72-ton working weight tracks.
– Manufacturing process: Precision seamless forging (forging ratio ≥3.5:1) + quenching and tempering treatment; the built-in spring is heat-treated for shaping; each piece undergoes rigorous flaw detection, dimensional calibration, and elasticity testing, conforming to GB/T 13314-2008 Manufacturing Specification for Tensioning Devices of Engineering Machinery.
– Core dimensions: Spring cylinder outer diameter 120mm, inner diameter 85mm, total length 580mm, internal spring diameter 18mm, spring coils 12, can be finely adjusted according to original factory standards, perfectly matches the track tensioning system mounting position, zero installation clearance, compatible with D375 series chassis structural dimensions.
– Compatible Models: Komatsu D375 series bulldozers (D375A-2, D375A-5, D375A-6, D375A-8, etc.), precisely matches the original chassis track tensioning system, can directly replace original parts, and is compatible with the 474kW power models in this series.

The Komatsu D375 tension spring cylinder (195-30-64212) is the preferred consumable for maintaining the tracks of Komatsu D375 series bulldozers, thanks to its Komatsu original equipment manufacturer (OEM) compatibility, excellent elastic stability, and resistance to harsh working conditions. Whether for personal equipment maintenance, bulk corporate purchases, or engineering maintenance support, it meets diverse needs. The product is easy to install, requiring no specialized tools, and can directly replace OEM parts. It effectively solves common problems such as spring cylinder deformation, seal leakage, and elasticity decay, reducing equipment downtime caused by track tensioner failure, lowering maintenance costs, improving equipment operating efficiency, and helping mining and infrastructure projects reduce costs and increase efficiency.

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