Replace Air Breather Element - Hitachi Zaxis 850LC-3 Operator's Manual

8 Replace Air Breather Element

--- every 4000 hours
WARNING: 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 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.
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 the element periodically to keep hydraulic oil
clean and to extend hydraulic components service life.
MAINTENANCE
1
2
3
4
7-40
W1JB-02-03-006
M1JB-07-001
M1G6-07-001