CAT 584-5791 BEARING-SLV-GD

CAT 584-5791 YM is a Caterpillar straight-sleeve steel bushing bearing (sleeve) suitable for light to medium load hinge points in equipment such as mini excavators and loaders, used to withstand low-speed oscillating radial loads. The following is the core technology and application information:

Core Technical Parameters
Item Details
Part Model: CAT 584-5791 (5845791) YM Straight-Sleeve Steel Bushing Bearing (Suitable for light to medium load hinge points, withstands radial loads + low-speed oscillation, matching pin 584-5790)

Core Material: 20CrMnTi alloy carburized steel, surface carburized and quenched, hardness HRC 58–62, carburized layer depth 0.8–1.0 mm, inner bore includes axial lubrication groove, compatible with NLGI 2 lithium-based grease

Key Dimensions: Inner diameter 38.1 mm, outer diameter 47.63 mm, length 41.28 mm, wall thickness 4.76 mm, unit weight approximately… 0.38 kg (0.84 lb)

Rated Load: Rated radial load 90 kN, limiting speed 500 rpm, operating temperature -30℃ to +120℃

Compatible Models: CAT 306E2/307E2 mini excavators (stick/linkage hinge), 239D3 compact track loader (boom pin), 907M mini loader (bucket hinge)

Suitable Working Conditions: Light to medium load, intermittent operation, oscillation frequency ≤ 5 times/minute, can withstand small impact loads

Core Functions and Structural Features:

High adaptability: YM series universal parts, alloy carburized steel material, good impact resistance and wear resistance, suitable for small equipment hinges, service life can reach more than 5000 hours under standard working conditions.

Reliable lubrication: The internal axial lubrication groove design ensures uniform distribution of grease, reduces the coefficient of friction, and reduces adhesive wear between pins and bushings.

Precise Installation: The direct-sleeve structure, with an interference fit to the mounting hole (interference 0.01–0.02 mm), ensures a coaxiality tolerance of ≤0.03 mm after installation, guaranteeing transmission accuracy.

High Cost-Effectiveness: The YM series offers a competitive initial purchase price, with durability and technical standards meeting industry expectations, suitable for light to medium-duty applications.

Installation and Maintenance Points

Installation Specifications: Clean the mounting hole and mounting surface, ensuring they are free of oil and rust. Use cold press fitting, controlling the pressing force to 10–12 kN. Do not strike the end face.

Mounting hole tolerance: +0.01–+0.02 mm. After installation, check for radial runout ≤0.03 mm.

After installation, apply NLGI 2 lithium-based grease, ensuring the lubrication groove is full.

Maintenance Recommendations: Check the operating status every 800 working hours, looking for abnormal noises, abnormal temperature rises, and seal leaks.

When the inner diameter wear exceeds 0.15 mm, it needs to be replaced in time. When replacing, the matching pin and sealing ring should be replaced at the same time to ensure the sealing and lubrication effect.