Swing Bearing Basic Operation; Disassembly - Doosan DX140R Shop Manual

Swing Bearing Basic Operation

The swing bearing, which connects the upper structure with the
lower structure, consists of a inner ring, outer ring and ball
bearings. During swing movement, power from the swing motor
is transferred to the pinion by planetary gears connected to
gears on the inner ring, which is fixed in the undercarriage. Ball
bearings turn the outer ring.
Reference
Number
1
2
3
4
5
6
7

Disassembly

1. Remove tip of tapered pin (3, Figure 3) using grinder and
tap lightly to remove debris.
2. Remove plug (4, Figure 4) using a M10 x P 1.5 bolt.
Swing Bearing
Description
Outer Ring
Inner Ring
Tapered Pin
Plug
Ball
Retainer
Seal
Figure 2
Figure 3
Figure 4
SP001856
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