How to Rebuild Swing Bearing for Doosan DX300LC Excavator

This instruction show you guide on how to rebuild swing bearing for Doosan DX300LC excavator.

Procedures:
1. Remove tip of tapered pin (3, Figure 3) using grinder and tap lightly to remove debris.

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2. Remove plug (4, Figure 4) using a M10 x 1.5 bolt.

 

 

3. Lift outer ring and check that inner ring can move freely.See Figure 5, if not, replace seal (7, Figure 6).
4. Turn inner ring and use magnet bar (C, Figure 6) to remove steel balls (5).
5. Turn inner ring and use wire (D, Figure 7) to remove retainers (6).