Belparts E385C swing bearing for excavator spare parts

Belparts E385C swing bearing for excavator spare parts

The excavator slewing ring (also called swing bearing) is a core component that connects the upper structure (cab, engine, etc.) with the undercarriage (track frame), enabling 360° unlimited rotation. Manufactured from high-strength alloy steel, it withstands enormous axial, radial, and moment loads.

Maintenance and Repair Procedures

Routine Maintenance

1. Lubrication

   • Use ISO VG 150–220 grease (e.g., Mobilith SHC 460).

   • Interval: Every 500 operating hours (varies by manufacturer).

2. Inspection Checklist

   • Check seal integrity.

   • Monitor grease for metal particles (indicates wear).

   • Measure gear backlash (should be <0.3mm).

Replacement Steps

1. Disassembly

   • Secure the excavator on a flat surface.

   • Remove upper structure bolts (typically M24–M36).

   • Lift the house using a crane.

2. Installation

   • Clean mating surfaces.

   • Torque bolts in a star pattern (preload: 70% of yield strength).

   • Prime lubrication system.

Tool Requirements:

• Hydraulic torque wrench.

• Dial indicator (for gear alignment).

• Overhead crane (10–50T capacity).

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