MAINTENANCE 6 Replace Air Breather Element --- every 4000 hours CAUTION: Hydraulic oil may be hot just after opera- tion. Hot hydraulic oil may spout, possibly causing severe burns. Be sure to wait for oil to cool before starting work. M104-07-021 Replacement Procedures 1. Park the machine on solid and level ground. Fully extend the bucket cylinder, fully retract the arm cylinder, and lower the bucket to the ground as illustrated to the right. Stop the engine. 2. Before replacing the element, be sure to bleed air pres- sure from the hydraulic oil tank by pressing the air bleed valve on the hydraulic oil tank. 3. Turn cover (2) clockwise about 1/4 turn.
Turn cap (1) counterclockwise to remove it. 4. Turn cover (2) counterclockwise to remove it. Then, re- move element (3). 5. Install new element (3). Tighten to install cover (2) until cover (2) comes in contact with the element. Then, fur- ther tighten the cover 1/4 turn. M1U1-07-042 6. Securely tighten cap (1) clockwise by hand. While holding cap (1) by hand so that cap (1) does not rotate, securely tighten cover (2) by rotating counterclockwise 5 to 10° by hand. 1 7. Take care never to allow water and/or contaminant to stay between cover (2) and body (4) (air breathing port). 8. Replace the element periodically to keep hydraulic oil clean and to extend hydraulic components service life.
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