Step-by-Step Guide to Replacing Mine Hoist Main Shaft Bearings

Replacing mine hoist main shaft bearings requires precision to ensure safety and efficiency. Follow these steps for a successful installation.

1. Preparation

• Secure the worksite: Disconnect power, lockout systems, and remove auxiliary parts (brakes, covers).

• Use I-beams and hydraulic jacks to lift the friction wheel, creating access space.

2. Removal & Installation

• Measure original bearing clearance. Inject high-pressure oil (10 MPa) to loosen the old bearing.

• Heat new bearings to 130°C for smooth fitting. Ensure proper alignment during installation.

3. Final Checks

• Verify clearance post-cooling. Reassemble components carefully.

• Conduct load tests to confirm performance.

This method reduces downtime and maintains hoist reliability. Always consult certified technicians for complex tasks to uphold safety standards.