CAT 583-4755 RACE-ROLLER-GD

CAT 583-4755 YM is a Caterpillar engineering machinery cylinder lug sliding bearing (steel-backed copper sleeve/bimetallic sleeve bearing), suitable for the hinge joint between the boom/stick cylinder lug and pin in small and medium-sized excavators and loaders. Its core function is to support cylinder swing and reduce pin wear. It is suitable for medium-pressure hydraulic conditions. The following is professional technical and application information:

Core Technical Parameters
Item Details
Part Model: CAT 583-4755 (5834755) YM Cylinder Lug Sliding Bearing, a bimetallic sleeve bearing, suitable for installation within the cylinder lug inner bore.

Core Materials: Steel back: Low carbon alloy steel (SAE 1045), inner liner: Tin bronze (CuSn6Zn6Pb3), surface contains solid lubricant (graphite), inner liner thickness 1.5 mm, steel back thickness 2 mm, copper layer hardness HB 80–100, coefficient of friction ≤0.15 (lubricated state)

Key Dimensions: Inner Diameter 50 mm (tolerance H7), outer diameter 58 mm (tolerance g6), total length 45 mm, inner hole with axial lubrication grooves (2 grooves, symmetrically distributed), 2 radial oil holes (5 mm diameter, evenly distributed at 180°), end face chamfer 1×45°, coaxiality ≤0.03 mm

Rated Parameters: Suitable operating temperature -20℃ to +120℃, rated radial load 150 kN, suitable oscillation frequency ≤8 times/minute, suitable pin surface hardness HRC 45-50, suitable grease: lithium-based NLGI grade 2

Suitable Working Conditions: Suitable for medium-pressure hydraulic cylinder lug hinge, anti-mud and sand, impact resistant, suitable for vibration ≤0.3 mm, static clearance ≤0.12 mm, installation interference 0.02–0.05 mm

Suitable Models: CAT 306E2/307E2 Excavator (boom cylinder lugs), 906M loader (boom cylinder lower lugs), 226D3 skid steer loader (tilt cylinder lugs)

Matchings: Fitting pins 175-4043 (φ50×180 mm), bolts 106-7772 (M12×35), dust seals 453-2168, grease nipples 1U-8878

Core Functions and Structural Features:

Bimetallic Wear Resistance: Steel backing provides high-strength support; tin bronze liner + graphite lubrication reduces friction between pins and bearings, suitable for short-term oil-film-free operation, preventing seizing.

Oscillating Adaptability: Internal lubrication groove + radial oil hole design ensures uniform grease coverage, suitable for high-frequency cylinder oscillation, reducing wear rate.

Impact Resistance: Bimetallic structure absorbs impact loads during cylinder operation, protecting cylinder lugs and pins, extending component life.

Secure Installation: Interference fit installation, fits the inner bore of the cylinder clevis, no additional positioning required, can be directly cold-pressed to replace the old bearing.

Installation and Maintenance Points

Installation Specifications: Clean the bearing’s inner and outer diameters, the cylinder clevis’s inner bore, and the pin, removing burrs and oil stains. Check the bearing for cracks and ensure the inner liner is not detached.

Cold-press installation, pressing force ≤60 kN, ensuring the bearing end face is flush with the clevis end face. After installation, the inner bore roundness should be ≤0.03 mm.

After installation, inject lithium-based grease. Test run; no jamming or abnormal noise, swing clearance ≤0.2 mm.

Maintenance Recommendations: Replenish grease every 300 working hours. Check wear every 1000 working hours. Replace immediately when the inner bore wear >0.3 mm or the copper layer peels off.

Avoid prolonged dry friction to prevent excessive copper layer wear, which could lead to direct contact between the clevis and the pin.