CAT 517-7865 60mm Inner Diameter Bushing

CAT 517-7865 is a Caterpillar original equipment manufacturer (OEM) straight-tube SEM bushing for SEM (Shandong) loaders/excavators, used at pivot joints. The following is structured raw data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 517-7865, Type: Straight-tube SEM Bushing, Material: High-strength Brass (CuZn25Al5), Oil-lubricated, Single Weight: 0.76 kg, Operating Temperature: -30℃ to +120℃, Fits Shaft Diameter: φ60 mm, Radial Load Capacity: ≤100 kN, Fits Swing Frequency: ≤5 times/minute, Fits Boom-Stick Hinge Point for SEM 650/652B/655D/658D Loaders and Cat 320D/322D Excavators

Key Dimensions
Inner Diameter: 60.0 mm (2.362 in), Outer Diameter: 70.0 mm (2.756 in), Length: 60.0 mm (2.362 in), Oil Hole Diameter: φ4.0 mm, Number of Oil Holes: 2 (Symmetrical), Inner Diameter Tolerance: + 0.028/-0.009 mm, outer diameter tolerance + 0.015/-0.006 mm, length tolerance ±0.15 mm, inner hole roughness Ra≤1.6 μm, outer diameter cylindricity≤0.018 mm
Compatible Models and Parts: Compatible with the hinge points on the boom of SEM 650/652B/655D/658D loaders, and the hinge points on the stick of Cat 320D/322D excavators. One piece per location, with pressure lubrication to reduce hinge friction and wear.
Performance Parameters: Coefficient of friction μ≤0.12 (boundary lubrication), compressive strength ≥600 MPa, yield strength ≥300 MPa, wear rate ≤0.03 mm/1000 hours, lubrication method is pressure lubrication (oil supply pressure 0.3-0.5 MPa), compatible shaft speed ≤60 r/min Structural and Performance Advantages
High-strength Brass Material: Wear-resistant and impact-resistant, suitable for heavy-load low-speed oscillation, preventing shaft and bushing seizure.

Dual Oil Hole Design: Symmetrical φ4.0 mm oil holes ensure uniform lubrication, reduce frictional heat, and extend service life.

Precision Dimension Control: Strict tolerances ensure precise matching with the shaft and seat bore, avoiding excessive clearance that could cause impact vibration.

Self-Lubricating Properties: Contains oil components, providing lubrication even during short-term oil shortages, improving equipment reliability.

Installation and Maintenance Points (Original Data)

Installation: Clean the journal and seat bore, press in the bushing (pressing force ≤45 kN, to prevent off-center loading), align the oil holes with the oil passage, check the radial clearance after installation (0.08-0.12 mm), ensure no jamming during oscillation, and tighten the seat bore bolts to a torque of 70-80 N·m.

Maintenance: Check wear and lubrication every 1500 hours, clean any oil hole blockages, replace the bushing if the radial clearance exceeds 0.25 mm, and check the journal wear at the same time.

Troubleshooting: If the clearance is too large, replace the bushing; if there is overheating due to poor lubrication, check the oil circuit; if there is surface scoring, repair the journal or replace the bushing.