CAT 526-3038 BEARING-SLV-GD

CAT 526-3038 is a Caterpillar genuine YM series cylindrical roller bearing with cage, suitable for heavy-duty radial support of hydraulic pumps, gearboxes, and chassis drive components. The following are raw specifications and do not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 526-3038 (YM Series), Type: Single-row cylindrical roller bearing with cage, Material: GCr15 bearing steel (quenched + tempered), Weight: 0.92 kg, Operating Temperature: -40℃ to +120℃, Rated Radial Dynamic Load: 145 kN, Rated Radial Static Load: 180 kN, Lubrication Method: Grease/Oil Lubrication, Fit Tolerance: P6, Corrosion Resistance: ≥96 hours salt spray, Suitable Shaft Diameter: 60 mm, With Nylon Cage, Surface Treatment: Oxidation Blackening + Rust-Preventive Oil Immersion

Key Dimensions (Metric/Imperial)
Inner Diameter: 60 mm (2.362 in), Outer Diameter: 90 mm (3.543 in), Total Width: 30 mm (1.181 in), Roller Diameter: 8 mm, Number of Rollers: 20, Chamfer R2 mm, Flatness: ≤0.02 mm, Surface Roughness: Ra≤0.8 μm, bore diameter tolerance +0.015/-0.00 mm, outer diameter tolerance +0.025/-0.01 mm, width tolerance +0.10/-0.05 mm

Performance Parameters: Surface hardness HRC 60-64, core hardness HB 200-230, limiting speed 3600 rpm (grease lubrication)/4500 rpm (oil lubrication), coefficient of friction ≤0.002 (lubricated state), coefficient of thermal expansion 11.8×10^-6/℃, radial clearance 0.015-0.025 mm, suitable tightening torque 120-140 N・m, no sealing structure, requires a separate sealing ring

Structure and Adaptability Characteristics: Heavy-duty radial load bearing: single-row cylindrical roller design, suitable for high-frequency heavy-duty parts such as hydraulic pump spindles and gearbox output shafts, distributing shaft loads, reducing contact stress, and extending component life.

Optimized Cage Design: The nylon cage with spaced rollers reduces friction and wear, making it suitable for medium- and high-speed rotation conditions, ensuring smooth operation, and reducing vibration and noise.

Precise Fit: Strict dimensional and tolerance control ensures a tight fit with the shaft and bearing housing after installation, meeting the high-precision positioning requirements of the transmission system and reducing impact loads caused by clearances.

Compatible Machine Models and Application Scenarios:

Hydraulic System: Compatible with the main pump spindle support of 320GC and 330GC excavators, used to withstand radial loads under high-pressure conditions, ensuring stable pump operation.

Gearbox: Compatible with the second and third shaft supports of 966K and 972K loader gearboxes, used to transmit power and withstand radial loads generated by gear meshing.

Chassis Driveline: Compatible with the input shaft support of the final drive unit of D6N and D7E bulldozers, suitable for heavy loads and impact loads under harsh working conditions, ensuring transmission efficiency and reliability.

Installation and Maintenance Points (Original Data)

Installation: Clean the shaft, bearing housing, and bearing, ensuring they are free of oil and metal shavings. Inspect the bearings for cracks, deformation, or rust; ensure the rollers rotate freely without jamming.

Hot installation (heating temperature 80-100℃) or cold pressing installation (pressing force ≤80 kN). Do not hammer or strike. The bearing and shaft should have an interference fit (interference 0.018-0.025 mm). Ensure proper installation without misalignment.

After installation, check that the radial clearance meets requirements. When installing the sealing ring, ensure the sealing surfaces fit snugly. Run the bearing for 30 minutes, monitoring the temperature to ≤80℃.

Maintenance: Check the lubrication status and bearing clearance every 1200 hours. For grease lubrication, add NLGI 2 lithium-based grease. For oil lubrication, change the lubricating oil regularly (every 2000 hours).

Replace the bearing immediately if roller wear, cage damage, or clearance exceeding 0.05 mm is found to prevent shaft vibration or seizure.