CAT 380-7563 BEARING-SLV-GD

CAT 380-7563 YM is a high-performance sleeve bearing for Caterpillar engines/transmissions. It is suitable for C15/C18 engine camshafts, 349D2 excavator rotary gearboxes, 992K loader gearboxes, and other components. It is used to support rotating shafts, reduce friction, and bear radial loads. It is often used in conjunction with 1J-0581 bearing caps and O-rings to ensure stable operation of the transmission system (Cat® Parts). The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 380-7563 YM, Sleeve Bearing (Busket/Sliding Bearing), material is steel-backed Babbitt alloy (steel backing Q235 + Babbitt alloy layer 0.3-0.5 mm, hardness HB20-30, tensile strength ≥180 MPa, excellent fatigue resistance and thermal conductivity), operating temperature -40℃ to +160℃, single weight approximately 1.2 kg, suitable for medium speed (≤2000 rpm), medium load (≤25 MPa) conditions, used to support rotating shafts, reduce friction, bear radial loads, and prevent shaft vibration and wear (Cat® Parts)

Key Dimensions
Inner diameter 90 mm (tolerance 0/-0.018 mm), outer diameter 110 mm (tolerance +0.020/0 mm), total length 45 mm, Babbitt alloy layer thickness 0.4 mm, inner hole surface roughness Ra≤0.3 μm, with tolerances of inner ring h6 (0/-0.018 mm) and outer ring H7 (+0.035/0 mm), chamfer 15°×1.5 mm, coaxiality ≤0.02 mm, cylindricity ≤0.015 mm. Compatible with Cat C15/C18 engines (camshaft bearings), 349D2 excavators (slewing gearbox input shaft bearings), 992K loaders (gearbox output shaft bearings), and D11T bulldozers (final drive input shaft bearings). Uses 1J-0581 bearing caps and 380-7564 O-rings (inner diameter 90 mm, wire diameter 4 mm).

Assembly fit: inner bore and shaft transition fit (clearance 0.008-0.015 mm), outer ring and bearing housing interference fit (interference 0.010-0.018 mm). Journal surface requires hardening (hardness HRC58-62, roughness…). (Ra≤0.2 μm), bearing housing bore precision bored (Ra≤1.6 μm), radial runout ≤0.02 mm after installation. Installation and Maintenance Points: Before installation, clean the inner and outer surfaces of the bearing, journal, and bearing housing bore. Check for scratches, porosity, and peeling of the Babbitt alloy layer. Measure dimensions and fit tolerances to ensure compliance. Apply Cat 10W-30 machine oil to the bearing housing bore for easy cold-press installation.

Use a special press to apply even pressure during installation. Do not strike the end face to prevent damage to the Babbitt alloy layer. After installation, manually rotate the shaft to ensure no jamming and radial clearance of 0.008-0.015 mm.

Maintenance and Replacement: Check bearing wear every 1200 hours. If the inner bore wear exceeds 0.12 mm or the Babbitt alloy layer cracks or peels off, replace immediately. It is recommended to replace the bearing simultaneously with the bearing cap and O-ring to ensure support and sealing performance.