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4.12.3
CHECKING CYLINDERS, PIPES AND HOSES FOR OIL LEAKAGE AND
DAMAGE
Internal pressure always exists in the hydraulic circuit. Do not fill or drain the fuel, or inspect or
maintain the machine before releasing the internal pressure. High pressure oil from even a pin hole
can penetrate the skin or eyes and cause severe injury or blindness. High pressure oil leakage may
be invisible. Wear protective glasses and gloves, and use a cardboard and plate to inspect the
leakage location. Receive treatment by a doctor immediately if high pressure oil contacts with the body.
If leakage of hydraulic oil begins, operations of the attachment, swing and travel lack sufficient power,
and will stop eventually, or only operations to one side may be disabled. If these conditions are
observed, immediately park the machine at a safe place and stop the engine.
1.
Move the pilot control shut-off lever to the "LOCKED" position and then stop the engine.
2.
When checking for the leakage spot, wear protective glasses and gloves, and wait until the
temperature of parts decreases to about 40 degrees C (104 degrees F).
3.
Use the starter key to release the lock, open the right side cover of the machine and support it
with the stay.
4.
Press the rubber cap of air breather (2) on the top of hydraulic oil tank (1) several times (5 - 7
times) to release the internal pressure of the hydraulic oil tank.
1. Hydraulic oil tank
2. Air breather
If abnormality occurs, immediately stop the engine and contact KOBELCO authorized dealer/distributor
for repair.
If the coolant or engine oil leakage and its quantity falls below the specified quantity, the warning lamp
is lit.
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4. INSPECTION AND MAINTENANCE
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4-35
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