Komatsu WA200-8 Operation & Maintenance Manual page 374

MAINTENANCE PROCEDURE
NOTICE
• Komatsu recommends using Komatsu genuine parts for replacement parts.
• If the machine is operated without the DEF tank breather element attached, or with the element oth-
er than Komatsu genuine parts, foreign materials may enter the DEF pump and DEF injector which
will cause failure of the machine. Never operate the machine without the DEF tank breather element
attached, nor use the element other than Komatsu genuine parts.
• Do not flush DEF tank breather element. Flushing or regenerating of it will degrade the performance
of element, and will cause the breakage of the DEF tank. Never reuse the element.
• Always stop the engine and clean around the DEF tank before replacing.
• After the engine is stopped, the DEF system devices automatically purge the DEF in the DEF injec-
tor and DEF pump and return it to the DEF tank to prevent malfunction of the devices caused by
freezing of the DEF or deposition of urea.
After the engine is stopped, the devices are operated for a few minutes. Replace the element after
the DEF system devices stop.
• Improper assembly of the DEF tank breather element may cause leakage of the DEF. Replace the
element in the correct procedure.
1.
Remove the bolts (1) (6 pieces) and remove the fender (2).
2.
Remove the bolts (3) (9 pieces) and remove the covers (4)
and (5).
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MAINTENANCE