Komatsu PC490-11, Installation And Instruction Manual

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1.
Set the TOP mark at the top with the line running on TOP
mark and plug (P) perpendicular to the ground surface.
2.
Remove plug (F) by using the handle.
When the oil level reaches a point 10 mm below the bot-
tom of the plug hole, the oil level is appropriate.
If the oil level is low, check it again according to the follow-
ing procedure.
1) Install plug (F).
2) Operate the travel lever to move the machine forward
or reverse and rotate the sprocket by 1 turn.
3) Then repeat Step 2 to check again.
3.
If the oil is insufficient, add oil through plug (F) hole.
Add oil until oil overflows from the hole of plug (F).
4.
After the inspection, install plug (F).
Tightening torque of plugs (P) and (F): 68.6 ± 9.8 Nm {7 ±
1 kgm}
REMARK
Plug (F) is installed at 2 places. Add oil through the one
with which it is easier to add oil and through which no in-
ternal gears are seen.
EVERY 1000 HOURS MAINTENANCE
Maintenance for every 50, 250 and 500 hours should be performed at the same time.
CHECK STRUCTURES FOR CRACKS
Before checking, be sure to remove any excessive dirt (e.g. from undercarriage) and excessive grease (e.g.
around area of articulating joint/pins) from areas of the machine to be checked.
Check structures for cracks. If any cracks are found contact your Komatsu distributor.
If the structure is welded, or holes are drilled in it, or it is repaired in any other way, its strength may be reduced.
Consult your Komatsu distributor before carrying out any repairs.
METHOD FOR REPLACING HYDRAULIC OIL FILTER ELEMENT
k k
WARNING
• Immediately after the engine is stopped, its parts and oil are still very hot and may cause burn in-
jury. Accordingly, wait until they have cooled down before starting the work.
• When removing the oil filler cap, the oil may spout out. Turn it slowly to release the internal pres-
sure, then remove it.
NOTICE
If the machine is equipped with a hydraulic breaker, the hydraulic oil deteriorates faster than in the nor-
mal bucket digging operation. Accordingly, perform maintenance referring to “MAINTENANCE INTER-
VAL FOR HYDRAULIC BREAKER (4-13)”.
Items to be prepared
Container to receive drained oil
MAINTENANCE PROCEDURE MAINTENANCE
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