Komatsu PC300LC-8 Operation & Maintenance Manual page 345

MAINTENANCE PROCEDURE MAINTENANCE PROCEDURE
5. Remove the undercover(1) and (2).
6. Set the oil container under the drain plug under the machine.
Using the handle, remove drain plug (P), (A) and drain the oil.
Check the O-ring installed to plug (P), (A), and if it is damaged,
replace the O-ring. After draining the oil, tighten drain plug (P),
(A).
Tightening torque of drain plug (P) and (A)
58.8 to 78.5 Nm (6 to 8 kgm, 43.3 to 57.9 lbft)
When removing drain plug (P), (A), be careful not to get oil
on yourself.
First, remove drain plug (P) at the bottom of the tank, then
remove drain plug (A) at the suction tube. If they are
removed in this order, almost the same amount of oil can be
drained.
7. Add the replacement amount of oil through oil filler (F). Check that the oil level is between the H and L lines on
the sight gauge (G).
For details of oil level check, see "Check Oil Level in Hydraulic Tank, Add Oil (PAGE 3-116)".
8. Install the undercover (1) and (2).
9. Bleed the air from the hydraulic circuit.
For details of the method of bleeding the air from the hydraulic circuit, see "BLEEDING AIR FROM HYDRAULIC
SYSTEM (PAGE 4-44)".
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MAINTENANCE MAINTENANCE