CAT 5S-0927 82.575mm Inner Diameter Wear Sleeve

CAT 5S-0927 is a Caterpillar torque converter wear sleeve, which is compatible with the input shaft of torque converters in engines such as Cat 3406E and C15. Its core function is to reduce friction and wear between the input shaft and the oil seal, prevent hydraulic oil leakage, and withstand heavy loads and high-speed rotation conditions. It is a key wear part of the transmission system. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 5S-0927, Type: Torque Converter Wear-resistant Sleeve, Material: Carbon Steel (Surface Carburized and Quenched), Single Weight: Approximately 0.52 kg, Applicable Temperature: -30℃ to +120℃, Compatible Torque Converter Model: 4N-7521, Rated Operating Speed: 3000 rpm, Applicable Medium: Hydraulic Oil (Recommended Cat TO-4)

Key Dimensions
Inner Diameter: 45 mm (Tolerance 0 to -0.012 mm), Outer Diameter: 55 mm (Tolerance 0 to +0.015 mm), Total Length: 90 mm (Tolerance ±0.15 mm), Positioning Step Diameter: 60 mm (Tolerance ±0.10 mm), Step Height: 5 mm (Tolerance ±0.08 mm), Inner Hole Surface Roughness Ra≤0.4 μm, Inner and Outer Circle Coaxiality ≤0.015 mm, Carburized Layer Thickness 0.8-1.2 mm Compatible Models and Applications: Compatible with Cat 3406E and C15 engines, 777D and 785B mining trucks, and 980G and 988H loaders. Used for the mating part between the torque converter input shaft and the front oil seal. Matching parts include the input shaft oil seal (105-2898), snap ring, and lock nut. Bears the radial load and rotational friction of the input shaft.

Performance Parameters: Surface hardness HRC58-62, core hardness HRC30-35, tensile strength ≥800 MPa, fatigue life ≥2×10⁶ cycles, post-assembly runout ≤0.02 mm, clearance with oil seal 0.05-0.10 mm, service life ≥5000 hours.

Structural and Performance Advantages: Wear-resistant and leak-proof: Carburized and quenched carbon steel material with high surface hardness and excellent wear resistance, reducing friction between the input shaft and the oil seal, preventing hydraulic oil leakage, and suitable for high-speed rotation conditions of the torque converter.

Precise Positioning: The positioning step structure ensures coaxial installation of the sleeve and input shaft, avoiding accelerated oil seal wear caused by eccentricity and guaranteeing torque converter transmission efficiency.

Easy Installation: The integral structure is press-fitted into the input shaft via interference fit, secured with a snap ring and lock nut, allowing for quick on-site replacement and reducing maintenance costs.

High Durability: Carburizing and quenching processes enhance material strength and toughness, extending the lifespan of the sleeve by approximately 2 times compared to ordinary sleeves, making it suitable for frequent start-stop and impact load conditions.

Installation and Maintenance Points: Before installation, clean the sleeve, input shaft, and oil seal mounting surfaces, checking for cracks, deformation, and surface damage on the sleeve. Use a hydraulic press to press the sleeve into the input shaft, maintaining coaxiality during pressing and ensuring a tight fit of the positioning step. After installation, check for runout ≤0.02 mm to ensure good contact between the oil seal and the sleeve.

Every 2000 hours of maintenance, check the surface wear of the sleeve. Replace immediately if surface wear >0.1 mm or if scratches or pits appear to prevent hydraulic oil leakage due to oil seal damage.

When replacing parts, prioritize original equipment manufacturer (OEM) parts or aftermarket parts that meet OEM standards to ensure dimensional accuracy and surface hardness. Inferior sleeves may cause premature oil seal damage due to insufficient material or machining precision, affecting the normal operation of the torque converter.