24. SERVICE PROCEDURE 4. Bleeding air from swing motor (Carry out this operation only when the oil in the swing motor case has been drained.) 1) Run the engine at low idling, loosen air bleed plug 1 and check that oil oozes out from air bleed plug 1 . NOTICE When doing this, do not operate the swing. 2) If no oil oozes out, stop the engine, remove air bleed plug 1 , then fill the motor case with hydraulic oil. 3) After completing the air bleed operation, tighten air bleed plug 1 . 4) Run the engine at low idling, and swing the upper structure at least 2 times uniformly to the left and right. NOTICE If the air is not bled from the swing motor, the motor bearings may be damaged. 5.
Bleeding air from travel motor (Carry out this operation only when the oil in the travel motor case has been drained.) 1) Run the engine at low idling, loosen air bleed plug 1 and check that oil flows out. If oil flows out, tighten the air bleed plug. 2) Keep the engine running at low idling, and swing the upper structure 90° to bring the work equipment to the side of the track. AM096350 3) Use the work equipment to jack up the chassis so that the track comes slightly off the ground, then run the track under no load for 2 minutes. Carry out this operation on the left and right sides. When rotating the track under no load, rotate the track uniformly in forward and reverse. AM091220 3-71