Description
CAT 505-1291 BEARING-SLEE
| CAT 505-1291 BEARING-SLEE |
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| CAT 574-2090 BEARING-SLEE |
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The CAT 505-1291 is a steel-backed, copper-sleeved, self-lubricating sleeve bearing for the hydraulic pump drive shaft of Caterpillar medium-duty excavators/loaders. Its core function is radial positioning and light-load support for the shaft system. It is compatible with the main pump end of Cat 320/323 GC models. The following is professional structured information.
Core Parameters (Professional Version)
Project Details
Basic Attributes
Model 505-1291, Quantity per unit: 1 piece, Suitable shaft diameter: 45 mm, Matching bearings: 116-8039, Sleeve: 431-5968, Weight: 0.95 kg, Used for radial support and positioning of hydraulic pump drive shaft/rotary gearbox output shaft
Key Dimensions
Inner diameter: 45 mm (Tolerance H7: 0–+0.025 mm), Outer diameter: 58 mm (Tolerance g6: 0–-0.025 mm), Total length: 52 mm, Positioning step height: 6 mm (Tolerance ±0.1 mm), Oil groove width: 3 mm (Depth: 0.5 mm, 4 evenly distributed grooves circumferentially), Chamfers at both ends: 1×45° (Tolerance ±0.1 mm)
Material and Process
Material is steel-backed copper sleeve (outer layer: 45# steel, inner layer: CuPb10Sn10 bronze, bonding strength ≥100) MPa), inner bore surface oil-impregnated (porosity 15%–20%), outer surface galvanized and passivated (salt spray test ≥48 hours), inner bore roughness Ra≤0.8 μm, end face flatness≤0.02 mm
Performance Parameters: Rated radial load ≥1000 N, operating temperature -20℃ to +120℃, linear speed ≤0.3 m/s, wear life ≥8000 hours (continuous operation), compatible with Cat DEO-ULS hydraulic oil, no damage during short-term operation (≤10 minutes) without lubrication
Compatible Models: Cat 320GC/323GC/326GC excavators, 950GC/962GC loaders, M318F wheel excavators, matching main pump model 359-0677, swing motor 416-6312
Installation and Maintenance Points: Clean the inner and outer surfaces of the sleeve and the mounting hole before installation. The mounting hole needs to be bored to… φ58H7 (tolerance 0–+0.030 mm), cold-fit (freeze at -20℃ for 1 hour) followed by pressing, with a pressing force ≤35 kN, ensuring the sleeve end face fits snugly against the mounting surface (gap ≤0.03 mm).
Maintenance cycle: Check the sleeve radial clearance every 1000 hours (replace if clearance >0.2 mm), replenish grease (Cat MTO-1000), check the oil groove for unobstructed flow, and replace the seal immediately if leakage is found.
Troubleshooting: If shaft vibration/abnormal noise occurs, first check for sleeve wear, deformation of the positioning step, and wear of the mounting hole. Replace the sleeve and repair the mounting hole if necessary.
