CAT 526-3042 80.12mm Inner Diameter Sleeve Bearing

CAT 526-3042 YM is a Caterpillar steel-backed bronze sleeve bearing, suitable for radial support of engine camshafts/balance shafts, transmission output shafts, etc., to withstand medium loads and impacts. YM is a premium component designation, with strong adaptability and durability, ensuring stable operation of components with low friction. The following is the core information:

Core Technical Parameters
Item Details
Part Model CAT 526-3042 (5263042) Steel-backed bronze bushing bearing, used for radial support of engine camshaft/balance shaft, gearbox output shaft, etc., bushing bearing only

Material Steel backing + CuSn10Pb10 bronze, steel backing thickness 2.0mm (HRC42-48), bronze layer thickness 1.8mm (HB95-115), surface tin plating 0.004mm for corrosion resistance, inner wall friction coefficient 0.07-0.10, suitable for oil lubrication, resistant to heavy-duty impact

Key Dimensions Inner diameter 70mm (tolerance 0-0.02mm), outer diameter 80mm (tolerance 0-0.03mm), length 45mm (tolerance 0-0.02mm), wall thickness 5mm, suitable shaft diameter 70.01-70.03mm, mounting hole diameter 80H7, clearance 0.018-0.032mm
Compatible with CAT C13B/C15 engines, 980GC loaders, and 336GC excavators; suitable for speeds ≤2800rpm, medium-load conditions.
Performance parameters: Radial rated load 75kN, limiting speed (oil lubrication) 3200rpm, operating temperature -35℃ to 160℃, fatigue strength ≥250MPa, suitable for cyclic loads.
Core functions and structural features:
Composite load-bearing: The steel backing provides rigid support, while the bronze layer reduces friction and embeds impurities, suitable for medium-load radial and impact loads on engines/transmissions, preventing journal wear and ensuring stable component operation.

Low friction and durability: A stable oil film is formed under oil lubrication, resulting in a low coefficient of friction, reducing energy consumption and heat generation. The tin plating layer provides corrosion protection, suitable for harsh conditions such as dust and vibration, extending service life.

Precise Fit: Strict dimensional and geometric tolerances ensure precise fit with journals and mounting seats, preventing loosening or misalignment after installation. This guarantees shaft rotation accuracy and reduces vibration and abnormal noise.

Superior Fit: The YM mark indicates high-quality fit. Dimensions are identical to the original manufacturer, requiring no adjustments for replacement. Compatibility is equivalent to the original, offering high cost-effectiveness.

Installation and Maintenance Points
Installation Specifications: Clean the bearing, journal, and mounting seat, removing oil and impurities. Inspect the bearing for scratches and dents. Use a cold pressing tool to smoothly press the bearing into the mounting seat, ensuring a tight, even fit with the rear face. The inner diameter roundness should be ≤0.01mm, and the clearance 0.018-0.032mm.

After installation, add SAE 15W-40 machine oil and test the shaft rotation for smooth operation, ensuring proper oil film formation.

Maintenance Recommendations: Check every 1200 working hours. Replace the bearing when bronze layer wear > 0.4mm or clearance > 0.05mm to prevent dry friction damage to the journal.

Regularly check the quality and level of the lubricating oil, keep the oil clean, and prevent impurities from entering and accelerating wear.