SERVICE PROCEDURE MAINTENANCE
4-48
METHOD OF MANUAL AIR BLEEDING
1. After replacing filter cartridge (1), loosen air bleed plug (2).
2. Loosen the knob of feed pump (3), pump it up and down
several tens of times until no more bubbles come out with
the fuel from the air bleed plug.
3. Tighten air bleeding plug (2).
A genuine Komatsu filter cartridge is recommended for
use.
After finishing the replacement of the filter cartridge, start
the engine and check that there is no oil leakage from the
filter seal surface.
REMARK
When the engine has run out of fuel, fill the fuel tank, then use
the same method and operate the feed pump to bleed the air.
CHANGE OIL IN ENGINE OIL PAN, REPLACE ENGINE OIL FILTER CARTRIDGE 4
WARNING
Engine parts and oil are at high temperature immediately after the engine is stopped, and will cause seri-
ous burns. Wait for the temperature to cool down before starting the operation.
q Refill capacity: 12.5 liters
q Prepare a socket wrench and filter wrench.
1. Remove inspection cover (1) at the bottom at the center of
the machine.
2. Put a container to catch the drained oil under the drain
plug, then loosen drain valve (P) slowly to drain the oil. Be
careful not to get the oil on yourself.
3. Check the drained oil, and if there are excessive metal par-
ticles or foreign material, please contact your Komatsu dis-
tributor.
4. Tighten drain valve (P).
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