Doosan DX60R Shop Manual page 103

Etching
Bearing surfaces appear gray or grayish black in color with
related etching away of material usually at roller spacing.
Replace bearings - check seals and check for proper
lubrication.
Misalignment
Outer race misalignment because of foreign object.
Clean related parts and replace bearing. Make sure races are
properly seated.
Indentations
Surface depressions on race and rollers caused by hard
particles of foreign materials.
Clean all parts and housings, check seals and replace bearings
if rough or noisy.
General Maintenance Procedures
Figure 7
Figure 8
Figure 9
SP000016
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