Komatsu HM400-5, Operation & Maintenance Manual

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2.
Remove bolts (3), and remove cover (4).
3.
Place the oil container right under the drain plug to receive
the drained oil.
4.
Remove drain plug (P) and drain the oil.
5.
After draining the oil, tighten drain plug (P).
6.
Remove the element.
7.
Wash the inside of the filter case, strainer at the bottom of
the filter case, and removed parts.
8.
Install the new element.
9.
Install cover (4) with bolt (3).
10. Add oil.
For the method to add oil to the transmission case, see “METHOD FOR CHECKING OIL LEVEL IN
TRANSMISSION CASE, ADDING OIL (3-153)”.
11. Remove the cap of bleeder screw (5).
12. Insert a vinyl hose to bleeder screw (5).
13. Prepare a container with oil in it, and put the other end of the hose approximately 50 mm into the oil.
(Use a commercially available vinyl hose.)
14. Start the engine.
15. Loosen bleeder screw (5) approximately 3/4 turns and run the engine at low idle until fewer bubbles come
out from the vinyl hose.
16. Tighten bleeder screw (5) securely, then install the cap.
17. Check that the oil level in the transmission case reaches the specified level.
If the oil level is low, add oil.
REMARK
When the air is bled from inside the case, the transmission oil level becomes stable.
18. Fix cover (2) with bolts (1).
METHOD FOR CHANGING OIL IN TRANSMISSION CASE
METHOD FOR CHANGING OIL IN BRAKE OIL TANK, REPLACE BRAKE OIL FIL-
TER 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.
• Refill capacity of transmission case 125 ℓ including brake oil tank, and filter cases.)
Perform the following items at the same time in order to drain oil completely.
• METHOD FOR REPLACING TRANSMISSION OIL FILTER ELEMENT (4-60)
• METHOD FOR CHANGING OIL IN TRANSMISSION CASE (4-61)
• METHOD FOR CHANGING OIL IN BRAKE OIL TANK, REPLACE BRAKE OIL FILTER ELEMENT (4-61)
Items to be prepared
• Container to receive drained oil
• Filter wrench
MAINTENANCE MAINTENANCE PROCEDURE
4-61