CAT 585-0370 BEARING-SLV-GD

CAT 585-0370 YM is a Caterpillar steel-backed copper-lead alloy sleeve bearing used for shaft support and positioning in hydraulic pumps/gearboxes. It is suitable for low-speed, heavy-load rotation under medium-to-high pressure conditions. The following is structured technical and application information from Cat® Parts.

Core Technical Parameters

Item Details
Basic Attributes Model 585-0370 YM, Type: Steel-backed copper-lead alloy sleeve bearing, Material: Low-carbon steel back + CuPb10Sn10 copper-lead alloy layer (thickness 0.8-1.0 mm), Single weight: Approximately 0.68 kg, Applicable pressure: ≤35 MPa, Applicable temperature: -30℃ to +120℃, Applicable medium: Cat TO-4 hydraulic oil / gear oil, Load capacity: ≥25 MPa, Coefficient of friction: ≤0.002 (oil lubrication)

Key Dimensions Inner diameter: 50 mm (tolerance H7), Outer diameter: 62 mm (tolerance g6), Length: 85 mm, Number of oil grooves: 2 (spiral groove, lead 120 mm), Oil hole diameter: 4 mm (3 evenly distributed), Alloy layer hardness: HB 220-250, Surface roughness: Ra≤0.8 μm, Roundness: ≤0.01 mm, Coaxiality: ≤0.015 mm
Compatible Models and Parts: Compatible with Cat 336GC/349GC excavator main pump (353-9845) bearing housing, 980M loader gearbox second axle, and 16M grader steering pump shaft end support. 1-2 pieces per machine, used for radial positioning and load transfer of the shaft system. Suitable for speeds ≤1500 rpm.

Performance Parameters: Rated working pressure 35 MPa, limiting speed 1800 rpm, allowable load 25 kN, wear rate ≤0.001 mm/1000 h, recommended lubrication method is pressure lubrication (flow rate ≥2 L/min), installation interference 0.015-0.025 mm, cleanliness requirement ISO 18/15.

Structural and Performance Advantages:
Composite layer structure: The steel backing provides high strength and rigidity, while the copper-lead alloy layer offers excellent friction reduction and embedding properties, suitable for impact loads and contaminated conditions, reducing the risk of shaft wear.

Lubrication Optimization Design: Double spiral oil grooves + 3 evenly distributed oil holes ensure uniform lubricant distribution, forming a stable oil film, reducing dry friction, and extending the service life of bearings and shafts.

Precision Dimension Control: Inner diameter tolerance H7, outer diameter tolerance g6, ensuring stable interference fit after installation, coaxiality ≤0.015 mm, avoiding vibration and leakage caused by shaft eccentricity.

High Versatility: Compatible with multiple Cat engineering machinery hydraulic pumps and gearboxes, requiring no adjustment of the installation structure, easy to replace, wide applicable temperature and pressure range, and high adaptability.

Installation and Maintenance Points: Before installation, clean the bearing housing bore and journal, check for cracks and peeling of the alloy layer, install using the cold pressing method (press-in force ≤50 kN), ensuring an interference fit of 0.015-0.025 mm, and after installation, check that the radial runout of the shaft is ≤0.02 mm.

Maintenance Cycle: Check lubricating oil cleanliness every 1000 hours, measure bearing clearance every 2000 hours, replace bearings when clearance exceeds 0.2 mm, replace filter elements regularly, and maintain stable lubrication pressure.

Common Faults and Solutions: Alloy layer wear is caused by poor lubrication or foreign object intrusion; replace bearings and inspect the lubrication system. Bearing overheating is caused by excessive interference fit or oil film rupture; adjust interference fit and increase lubrication flow. Journal wear is caused by excessive bearing clearance; replace bearings and repair journals.