Komatsu WA480-8 Operation & Maintenance Manual page 391

MAINTENANCE
The DEF filter is located at the positions shown in the figure.
1.
Remove filter cap (1) at the bottom of DEF pump, and re-
move equalizing element (2).
2.
Turn cap (4) of filter removal tool (3) and remove it.
3.
Check the installation of spacer (5).
4.
Insert filter removal tool (3) into the bottom of the DEF
pump and thrust in with hand.
5.
Check that filter removal tool (3) is fully inserted to the end.
Insert the filter removal tool (3) to the end where you can-
not thrust it in any further.
MAINTENANCE PROCEDURE
4-67