CAT 584-4245 General Duty Sleeve Bearing

CAT 584-4245 YM is a Caterpillar straight-tube steel-backed copper alloy sleeve bearing (also called a sliding bushing). It is suitable for Cat D series excavators, 950M loaders, C13 engines, connecting rod/rocker arm pins, pilot valve shafts, or rotary gearboxes. It is used to bear radial loads, position the shaft system, and reduce friction. It is suitable for low-to-medium speed, medium load, and vibration conditions, prevents shaft wear and movement, and ensures stable operation of the transmission and hydraulic systems. The following is structured technical and application information:

Core Technical Parameters
Item Details
Basic Attributes
Model 584-4245 YM, Straight-tube steel-backed copper alloy sleeve bearing (sliding bushing), suitable for Cat D series excavators, 950M loaders, C13 engine connecting rod/rocker arm pins, pilot valve shafts, and rotary gearboxes. Material is steel backing + copper-lead alloy (tin-plated). Operating temperature -40℃ to +120℃, single weight approximately 0.38 kg. Used to bear radial loads, position shafts, and reduce friction. Suitable for low-to-medium speed, medium load, and vibration conditions. Prevents shaft wear and movement, ensuring stable operation of transmission and hydraulic systems.

Key Dimensions
Inner diameter 38.10 mm (1.5 inches, tolerance 0/-0.018 mm), outer diameter 47.63 mm (1.875 inches), total length 50.80 mm (2 inches), wall thickness 4.76 mm, minimum chamfer at both ends. 1.2 mm diameter, inner bore and shaft fit tolerance h7 (0/-0.015 mm), coaxiality ≤0.02 mm. Compatible models: Cat 320D2/336D2 excavators (slewing gearbox, stick pin), 950M/966M loaders (drive axle, pilot valve shaft), C13 engine (connecting rod/rocker arm pin), 140M grader (rear axle differential).
Assembly fit: Compatible with 38.1 mm diameter shaft (tolerance h7, 0/-0.015 mm), bearing housing bore diameter 47.63 mm (tolerance H8, +0.039/0 mm). During installation, a clearance fit (0.012-0.025 mm) is used with the shaft. Cat 9S-3265 fastener can be used for fixing, with 1.5-2 mm clearance left at both ends. Installation allowance to avoid interference with surrounding components.

Installation and Maintenance Points:
**Before installation, clean the inner bore of the sleeve, journal, and bearing housing bore. Check for scratches, rust, and cracks on the surface. Measure the dimensions of the journal and bearing housing bore to ensure the fit meets requirements. The journal fillet radius should be ≤1.2 mm to avoid stress concentration.

Use cold fitting or low-temperature press fitting (do not heat above 80℃) to smoothly press the sleeve into the bearing housing bore. Do not directly strike the sleeve end face with a hammer to prevent deformation or alloy layer peeling. After installation, check the coaxiality to ensure the shaft system rotates without jamming.

Maintenance Recommendations: Check the sleeve wear and lubrication condition every 1200 hours. If the inner diameter wear exceeds 0.15 mm or peeling or cracks appear on the surface, replace it immediately. Regular lubrication with Cat Moly Grease is recommended to extend service life.