CAT 394-0194 BEARING-SLV-GD

CAT 394-0194 YM is a Caterpillar Yellowmark series bimetallic bushing assembly, adapted for articulated pins, connecting rod pins, and other components in excavators, loaders, and other construction machinery. It is used to reduce friction, withstand radial loads, and provide positioning. The following is raw data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 394-0194 YM, Type: Bimetallic Bushing Assembly (Steel Back + Copper-Lead Alloy), Single Weight 0.78 kg, Operating Temperature -40℃ to +120℃, Applicable Load ≤120 kN, Applicable Shaft Diameter 65 mm, Lubrication Method: Grease Lubrication, Fit Tolerance H7, Corrosion Resistance ≥96 hours Salt Spray, Steel Back Material: Q345, Liner Material: CuPb10Sn10, Bond Strength ≥150 MPa, Fitting Clearance 0.015-0.03 mm

Key Dimensions (Metric/Imperial) Inner Diameter 65 mm (2.559 in), Outer Diameter 85 mm (3.346 in), Total Length 50 mm (1.969 in), Steel Back Thickness 3 mm, Liner Thickness 2 mm, Chamfer R1.0 mm, Flatness ≤0.03 mm, Surface Roughness Ra≤0.8 μm, Inner diameter tolerance +0.020/-0.00 mm, Outer diameter tolerance +0.015/-0.01 mm, Length tolerance +0.10/-0.05 mm

Performance Parameters: Liner hardness HB 70-90, Steel backing hardness HB 180-200, Coefficient of friction ≤0.08 (lubricated state), Coefficient of thermal expansion 16.5×10^-6/℃, Compressive strength ≥250 MPa, Shear strength ≥80 MPa, Limiting speed for oilless lubrication 150 rpm, Limiting speed for grease lubrication 500 rpm, Suitable tightening torque 80-100 N・m

Structure and Adaptability Characteristics: Bimetallic composite structure: The steel backing provides high-strength support, while the copper-lead alloy liner offers excellent friction reduction and embedding properties, suitable for heavy-load and low-speed oscillating conditions, distributing shaft loads, reducing pin wear, and extending component service life.

Precise Clearance Design: Strict dimensional and tolerance control ensures a tight fit with pins and mounting brackets after installation, adapting to the positioning requirements of articulated parts, reducing impact caused by clearances, and guaranteeing smooth movement.

Universal Compatibility: Compatible with boom and stick articulation pins, as well as swing mechanism linkage pins, etc., of Caterpillar 320D2, 323D2 excavators and 966M loaders, suitable for heavy-duty and frequent swinging conditions, and easy to install.

Compatible Models and Application Scenarios:

Excavators: Boom pins, stick pins, and bucket pin bushings for models such as 320D2, 323D2, and 326D2, bearing heavy loads and swinging, reducing pin wear, and ensuring stable operation of the working device.

Loaders: Boom articulation pins and rocker arm pin bushings for models such as 966M and 972M, suitable for frequent lifting and turning conditions, reducing friction and improving work efficiency.

Other: Compatible with the hinged joints of the working devices of some Caterpillar bulldozers and graders, meeting the wear resistance and positioning requirements under harsh working conditions.

Installation and Maintenance Points (Original Data)

Installation: Clean the bushing and mounting base, ensuring they are free of oil stains and metal shavings. Inspect the bushing for deformation and cracks, and check for any lining peeling or damage.

Cold press installation (pressing force ≤ 80 kN) or hot installation (mounting base heating temperature 80-100℃). Do not hammer or strike. Ensure the bushing and mounting base have an interference fit (interference 0.015-0.025 mm), and that the bushing is properly installed without misalignment.

After installation, check the inner diameter and roundness. If they meet the requirements, apply grease and run for 30 minutes, monitoring for any abnormal heating or noise.

Maintenance: Check the bushing wear and lubrication condition every 500 hours. Replace immediately if lining wear exceeds 0.5 mm or clearance exceeds 0.05 mm.

Regularly replenish NLGI 2 lithium-based grease. Use specialized tools during disassembly to avoid prying hard, which could deform the bushing or damage the liner.