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OPERATION
1. Set the work equipment in the posture shown in the dia-
gram on the right, then check the oil level and add oil if
necessary.
2. If the machine is not in the condition shown in the diagram
on the right, start the engine, run the engine at low speed,
retract the arm and bucket cylinder fully, lower the boom,
put the bucket teeth in contact with the ground, then stop
the engine.
3. Within 15 seconds after stopping the engine, move each
control lever (for work equipment and travel) to the full
stroke in all directions to release the internal pressure.
4. Open cover (1) on the left side of the machine and check
sight gauge (G). The oil level should be between the H
and L marks.
5. If the level is below the L mark, add oil through oil filler (F)
at the top of the hydraulic tank.
REMARK
The oil level will vary depending upon the oil temperature.
Accordingly, use the following as a guide:
Before starting operation: Between H and L levels
(Oil temperature 10 to 30°C)
Normal operation: Around H level
(Oil temperature 50 to 80°C)
NOTICE
Do not fill with hydraulic oil exceeding the "H" level, other-
wise there will be damage on the hydraulic system, or oil
will spurt out.
When having filled with hydraulic oil above "H" level by
mistake, swing the upper structure so that drain plug (P) in
the lower part of the suction tube comes in between the
right and left track shoes, stop the engine and drain
excess oil from drain plug (P) after making sure that oil
has cooled down enough.
MACHINE OPERATIONS AND CONTROLS
3-81
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