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MAINTENANCE
MAINTENANCE PROCEDURE
REPLACE HYDRAULIC OIL FILTER ELEMENT
WARNING
The parts and oil are at high temperature immediately after the engine is stopped, and may cause burns. Wait for the
temperature to go down before starting the work.
When removing the oil filler cap, turn it slowly to release the internal pressure, then remove it.
NOTICE
If the machine is equipped with a hydraulic breaker, the hydraulic oil will deteriorate much faster than during normal bucket
operations. For details, see "MAINTENANCE INTERVAL FOR HYDRAULIC BREAKER (PAGE 4-16)" when carrying out
maintenance.
1.
Remove the cover at the top of the hydraulic tank.
2.
Remove the cap from oil filler (F), and release the internal
pressure.
3.
Loosen 3 bolts, then remove cover (1). When doing this, the
cover may fly out under the force of spring (2), so hold the
cover down when removing the bolts.
4.
After removing spring (2) and valve (3), take out element (4).
5.
Clean the removed parts in flushing oil.
6. Install the new element in the place where old element (4) was
installed.
7.
Set valve (3) and spring (2) on top of the element.
8. Set cover (1) in position, push it down by hand, and install the
cover with the mounting bolts.
9.
Install the oil filler cap, then install the cover at the top of the
hydraulic tank.
10.
To bleed the air, start the engine according to "STARTING
ENGINE (PAGE 3-133)" and run the engine at low idle for 10
minutes.
11.
Stop the engine.
REMARK
Operate the machine after halting for more than 5 minutes to eliminate bubbles in the oil inside the tank.
12. Check for oil leakage and wipe off any spilled oil.
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