CAT 584-6578 BEARING-SLV-GD

CAT 584-6578 YM is a straight-tube steel-backed aluminum-coated sleeve bearing (shroud) for Caterpillar engineering machinery. It is suitable for use in the boom, bucket, or connecting rod pins of loaders, excavators, etc., to withstand heavy-duty radial sliding friction. The following is structured technical and application information for Cat® Parts.

Core Technical Parameters

Item Details
Basic Attributes Model 584-6578 YM, Type: Straight-tube sleeve bearing, Material: Steel back + aluminum-based alloy (steel back hardness HB 220-260, aluminum layer thickness 0.8-1.2 mm, tin-plated surface), Single weight approximately 1.8 kg, Suitable temperature: -20℃ to +120℃, Suitable operating conditions: low speed, heavy load, reciprocating oscillation, no axial load capacity

Key Dimensions Inner diameter 120 mm, Outer diameter 140 mm, Length 80 mm, Chamfer R3 mm, Inner diameter tolerance H7, Outer diameter tolerance h6, Inner hole surface roughness Ra≤0.4 μm, Cylindricity ≤0.012 mm, Parallelism of both end faces ≤0.02 mm, Radial clearance 0.12-0.18 mm

Compatible Models and Locations Compatible with Cat 972M/980M Loader bucket pins, 336GC/349GC excavator boom cylinder connecting rod pins, 140M grader tow frame pins, 2-4 pieces per machine, suitable for radial load ≤250 kN, sliding speed ≤0.8 m/s working conditions.

Performance Parameters: Allowable specific pressure [P]≥180 MPa, coefficient of friction ≤0.08 (oil lubrication), aluminum layer hardness HB 80-100, recommended Cat 10W-30 hydraulic oil lubrication, lubrication method is grease nipple pressure lubrication, lubrication cycle every 500 hours, with radial lubrication holes (2, diameter φ6 mm, symmetrically distributed).

Structural and Performance Advantages: Steel-backed aluminum-layer composite structure: The steel back provides high strength and rigidity, while the aluminum-based alloy layer has excellent anti-galling and wear resistance, suitable for heavy-duty sliding conditions in engineering machinery, effectively reducing relative wear between pins and bearings.

Lubrication Hole Design: Radially symmetrical lubrication holes ensure even distribution of lubricating oil, reducing the coefficient of friction, extending service life, and meeting the lubrication needs of high-frequency swinging parts such as booms and buckets.

High-Precision Dimensional Control: Strict tolerance and surface roughness requirements ensure a good fit with the pins and mounting holes after installation, resulting in smooth operation, reduced impact and vibration, and improved equipment efficiency.

Strong Adaptability: Standardized straight-tube design, compatible with various Caterpillar construction machinery, easy installation, no complex adjustments required, reducing maintenance time and costs.

Installation and Maintenance Points: Before installation, clean the pins and mounting holes to remove burrs, oil, and rust. Check the inner and outer surfaces of the bearing for scratches and deformation. During installation, use a dedicated pressing tool to apply even pressure to press the bearing into the mounting hole. The pressing pressure should be ≤80 kN to avoid localized stress that could damage the aluminum layer. After installation, ensure the radial clearance is within the specified range.

Lubrication Specifications: After installation, inject sufficient hydraulic oil through the grease fitting to ensure adequate lubrication of the aluminum layer surface. Check the lubrication status every 500 hours and replenish the lubricating oil as needed to prevent dry friction that could lead to bearing overheating and wear.

Maintenance Cycle: Check the bearing wear every 1000 hours. If the inner diameter wear exceeds 0.2 mm, or if defects such as peeling or cracking appear in the aluminum layer, replace the bearing immediately. Avoid subjecting the bearing to axial loads and severe impacts to prevent deformation of the steel backing and detachment of the aluminum layer.