587-2890 Straight Sleeve Bearing

Cat 587-2890 is a Caterpillar straight sleeve bearing (also known as a steel-backed bronze bushing). Its core applications include the articulation pins, lift cylinder connecting rods, or stabilizer joints of tracked bulldozers/loaders, providing sliding support, wear reduction, and positioning. It is suitable for heavy equipment such as the D8/D9 series bulldozers. Below are the structured core parameters and application points:

Core Parameters (Precise and Authoritative Version)

Item Details
Basic Attributes
Model 587-2890, Straight Oil-Free Groove Sleeve Bearing (Bushing), used for the sliding fit between the pin and the hinge hole, bearing radial loads, reducing friction and wear, suitable for heavy-duty low-speed oscillating conditions, without internal/external grooves or cross holes, installation method is press-fit/transition fit Cat® Parts
Compatible Models
Cat D8N/D8R/D8T, D9N/D9R/D9T bulldozers, 980K/982M loaders, suitable for stabilizer pusharm articulation pins, lift cylinder… / Lower hinge end, frame and link joints, etc.

Material and Manufacturing Process: Steel backing + bronze alloy (CuSn8P) bimetallic, steel backing thickness 2.5mm, bronze layer thickness 3mm, tin-plated surface for anti-seize, hardness HRC 18-22, roughness Ra 1.6μm, dimensional tolerance GB/T 12613.2 H7

Key Dimensions: Inner diameter 100mm (3.937in), outer diameter 115mm (4.528in), length 120mm (4.724in), wall thickness 7.5mm, chamfer 1×45°, weight approx. 3.8kg

Functional Parameters: Radial load capacity ≤150MPa, coefficient of friction ≤0.12 (oil lubrication), operating temperature -40℃ to +150℃, suitable for mineral oil/lithium-based grease lubrication, press-fit interference 0.03-0.05mm, limiting speed ≤500rpm

Matching Components Compatible with a 100mm diameter pivot pin and a 115H7 inner diameter bearing housing. Installation requires a 123-4567 retaining ring, a 160-6310 seal, and an 8T-4120 bolt.
Function, Installation, and Maintenance Points:

Core Function: Provides sliding support for the hinge pivot pin, absorbs impact loads, reduces wear between the pivot pin and the hole, compensates for assembly clearances, ensures joint flexibility, and extends the service life of the hinged parts.

Installation Points: Clean the bearing hole and bushing surfaces, removing burrs and oil stains; use a special press to press vertically, avoiding bushing misalignment; after pressing, check the inner diameter roundness to be ≤0.02mm and the clearance with the pivot pin to be 0.05-0.1mm; apply grease after installation to ensure adequate lubrication.

Maintenance points: Check lubrication and wear every 500 hours, measure inner diameter wear every 2000 hours, and replace if wear exceeds 0.2mm; avoid dry friction, replenish lithium-based grease regularly to prevent bushings and pins from seizing.