MAINTENANCE PROCEDURE MAINTENANCE 10. Bleeding air from swing motor (only after draining oil from swing motor case) 11. Run the engine at low idling, Loosen air bleeding plug (1) and check that oil oozes out from air bleeding plug (1). NOTICE When doing this, do not operate the swing. 12. If no oil oozes out, stop the engine, remove air bleeding plug (1), then fill the motor case with hydraulic oil. 13. After completing the air bleed operation, tighten air bleed- ing plug (1). 14. Run the engine at low idling and slowly swing at least two times uniformly to the left and right. This will automatically bleed the air.
NOTICE q If the air is not bled from the swing motor, the motor bearings may be damaged. q When replacing the travel motor safety valve, please contact your Komatsu distributor to have it replaced and to have the air bled. 4-44