Komatsu PC490-11, Installation And Instruction Manual

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• Socket wrench handle
1.
Swing the upper structure so that drain plug (P) of the hy-
draulic tank and drain plug (A) at the bottom of the pump
suction tube are placed in between the right and left
tracks.
2.
Retract the arm and bucket cylinder rods, then lower the
boom to lower the tooth to the ground.
3.
Set the lock lever to LOCK (L) position and stop the en-
gine.
4.
Remove the cap of oil filler port (F).
5.
Remove undercovers (1) and (2).
6.
Place the oil container under the drain plug under the ma-
chine.
When removing drain plugs (P) and (A), be careful not to
get oil on yourself.
Almost the same amount of oil can be drained from 2 pla-
ces, by removing plug (P) from the tank bottom first and
then plug (A) from the suction tube.
7.
Remove drain plug (P) from the tank bottom to drain the
oil.
Check the installed O-ring for damage. Replace O-ring with a new one if necessary.
8.
Remove drain plug (P) from the suction tube to drain the oil.
Check the installed O-ring for damage. Replace O-ring with a new one if necessary.
9.
After draining the oil, tighten drain plugs (A) and (P).
Tightening: 58.8 to 78.5 Nm {6 to 8 kgm}
10. Add the refill capacity of oil through oil filler port (F).
11. Check that the oil level is between H and L lines on sight gauge (G).
For applicable oils, see “USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEM-
PERATURE (7-6)”.
MAINTENANCE MAINTENANCE PROCEDURE
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