MAINTENANCE
OUTLINE OF SERVICE
4-9
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Be careful to keep the electric system free of water when washing the machine or when it rains.
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When working at the seashore, carefully clean the electric system to prevent corrosion.
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When installing electrical equipment, connect it to the special power source connector.
Do not connect the optional power source to the fuse, starting switch, or battery relay.
HANDLING HYDRAULIC SYSTEM
4
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During operations and after completion of operations, the hydraulic equipment is at a high temperature. Dur-
ing operations, it is also under high pressure, so when carrying out inspection and maintenance of hydraulic
related equipment, be careful of the following points.
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Stop the machine on flat ground, lower the work equipment completely to the ground, and carry out the
operation so that there is no pressure on the cylinder circuits.
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Always stop the engine.
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Immediately after stopping operations, the hydraulic oil and lubricating oil is at high temperature and high
pressure, so wait for the oil temperature to go down before starting maintenance.
Even after the temperature has gone down, some parts may still be under internal pressure, so when loos-
ening plugs, bolts, or hose connections, do not stand directly in front of the parts, and loosen slowly to
release the internal pressure before removing.
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When carrying out inspection and maintenance of the hydraulic circuit, always release the air in the
hydraulic tank to remove the internal pressure.
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Inspection and maintenance include checking the hydraulic system for oil level, replacement of filter elements
and replacement of hydraulic oil.
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If high-pressure hoses have been removed, check that there is no damage to the O-rings. If any damage is
found, replace the O-ring.
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It is necessary to bleed the air from the circuits when the hydraulic filter element or strainer have been
replaced or washed, or when hydraulic equipment has been repaired or replaced, or when the hydraulic piping
has been removed.
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The accumulator is charged with high-pressure nitrogen gas, and it is extremely dangerous if it is handled
incorrectly. For details of the method of handling, see “CHECKING CHARGE PRESSURE OF NITROGEN
GAS IN ACCUMULATOR (FOR CONTROL CIRCUIT) (4-66)“.
Summary of Contents for 69001
Page 2: ......
Page 3: ...FOREWORD 11 ...
Page 24: ...CONTENTS 1 22 ...
Page 54: ...PRECAUTIONS FOR MACHINE SAFETY 2 30 ...
Page 177: ...OPERATION TROUBLESHOOTING 3 123 ...
Page 178: ...TROUBLESHOOTING OPERATION 3 124 ...
Page 253: ...SPECIFICATIONS 15 ...
Page 270: ...EQUIPPING FIRE EXTINGUISHER AND FIRST AID KIT ATTACHMENTS OPTIONS 6 16 ...
Page 271: ...INDEX 17 ...
Page 272: ...INDEX 7 2 ...
Page 275: ...COLOPHON 18 ...