SERVICE PROCEDURE
MAINTENANCE
4-24
7.
Replace O-ring (7) for cover (3) with new one.
8.
Set the arrow mark on cover (3) at the top, install to the air
cleaner body, then secure with clip (2).
9.
Push the button of dust indicator (1) and return the yellow
piston to its original position.
REMARK
Immediately after a new element has been installed, the yellow
piston of the dust indicator may go to the 2nd position, but this
does not indicate any abnormality.
10. Close the left engine side cover.
CLEAN INSIDE OF COOLING SYSTEM
4
WARNING
q
Just after the engine is stopped, the coolant is still hot and the internal pressure in the radiator is still
high. If the radiator cap is removed under this condition, you may scald yourself. Accordingly, wait
until the temperature goes down, then loosen the cap slowly to release the pressure.
q
Start the engine to clean the cooling system. When standing up from the operator's seat or leaving the
machine, set the work equipment lock lever and parking brake lever to the LOCK positions.
q
For the starting method of the engine, see “CHECK BEFORE STARTING ENGINE, ADJUST (3-53)“ and
“STARTING ENGINE (3-68)“ in the OPERATION section of the manual.
q
Never go under the machine body while the engine is running. It is very dangerous since the machine
may move suddenly.
Clean the inside of the cooling system, change the coolant and replace the corrosion resistor according to the
table below.
*: Permanent type antifreeze shall meet the requirements of ASTM D3306-03.
Stop the machine on level ground when cleaning or changing the coolant.
Antifreeze coolant
Interval of cleaning inside of cooling system
and changing antifreeze coolant
Replacing corrosion resistor
Komatsu supercoolant
(AF-NAC)
Every two years or every 4000 hours
whichever comes first
Every 1000 hours
and when cleaning the inside
of the cooling system
and when changing coolant.
Permanent type antifreeze
(All-season type, *)
Every year (autumn) or every 2000 hours
whichever comes first.
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 ...