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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.
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 element (3), 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 element (3). Then, further
tighten cover (2) 1/4 turn.
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.
7. Take care never to allow water and/or contaminant to
stay between cover (2) and body (4) (air breathing port).
8. Replace element (3) periodically to keep hydraulic oil
clean and to extend hydraulic components service life.
MAINTENANCE
1
2
3
4
7-36
M104-07-021
M157-07-185
M1G6-07-001
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