Komatsu HB365LC-3 Operation & Maintenance Manual page 429

MAINTENANCE
After the engine is stopped, the DEF system devices automatically purge the DEF in the DEF injector and DEF
pump and return it to the DEF tank to prevent malfunction of the devices caused by freezing of the DEF or dep-
osition of urea.
After the engine is stopped, the devices are still operated for a few minutes. Before replacing the filter, clean
around the DEF pump first after the DEF system devices stop.
Items to be prepared
• DEF filter removal tool
The DEF filter is located at the position shown in the figure.
1.
Remove the filter cap (1) at the bottom of the DEF pump,
and remove the equalizing element (2).
2.
Turn the cap (4) of filter removal tool (3) and remove it.
3.
Check the installation of spacer (5).
4.
Insert the filter removal tool (3) into the bottom of the DEF
pump and thrust in by hand.
MAINTENANCE PROCEDURE
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