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MAINTENANCE
INSPECTING THE HYDRAULIC OIL TANK
LEVEL AND REPLENISHING
• Before performing maintenance on the
top of the machine or the work bench,
clean the footing and observe the
following precautions to prevent falling.
· Do not spill oil or grease.
· Do not leave tools scattered around.
· Watch your step when walking.
• Never jump down from the machine.
Use the steps and handrails when
climbing up and down the machine, and
always support your body at three
points with your hands and feet.
• Oil may spurt out if caps or filters are
removed or pipes are disconnected
before releasing the pressure in the
hydraulic system.
· Press the air breather button to relieve
the internal pressure from the tank.
Inspection
The oil level changes with the oil
temperature. Inspect the oil by maintaining
the machine posture as shown in the figure.
• Machine posture for inspecting the
hydraulic oil level
DAILY INSPECTION (EVERY 10 HOURS)
1. Start the engine and run it at low speed.
2. Fully retract the cylinders (second boom,
arm and bucket), and lower the bucket to
the ground.
3. Lower the dozer blade, and then stop the
engine.
4. Open the right side cover.
5. Inspect the oil level using the sight gauge
(1).
· When the oil temperature is about 20°C
(68°F):
The level should be between the upper
limit (H) and the lower limit (L).
If it is below the lower limit (L), replenish.
· When the oil temperature is about 50 to
80°C (122 to 176°F):
The level should be slightly below the
upper limit (H).
Replenishing
IMPORTANT: Do not fill up to the level
higher than the upper limit (H). It will
damage the hydraulic circuits or result in
oil spurting. If accidentally done, stop the
engine and wait the hydraulic oil to cool,
and then let the excessive oil to drain
from the drain plug.
1. Remove the air breather cap and press
the button (2) to relieve the internal
pressure from the tank
2. Remove the plug (3).
3. Add the hydraulic oil up to the middle of
the sight gauge (1).
4. Tighten the plug (3).
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