DL06K Interim Tire-4 Diesel Engine Disassembly and Reassembly of Major Components
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3.6.12. Caution while working at DPF assembly
Be cautious of below when handling and assembling DPF.
1) DOC and DPF must be protected from shock that can be caused by dropping and
hitting when being removed.
2) Technical failure can be occurred when substance from outside infiltrates into the
differential pressure sensor pipe during replacement.
3) The infiltration of exterior substance during the removal process can cause defect
in DOC and DPF.
4) Differential pressure sensor and temperature sensor should be protected from
being damaged during the process of removal since they are placed outside of DPF.
5) A new set of gaskets should be placed to prevent leakage instead of placing the
used ones.
6) Leakage from exhaust system can cause failure meeting regulations, raise in the
noise level and increase in harmful exhaust, and observance of proper torque is
crucial when assembling.
z Ash removal in DPF, DPF cleaning
Regeneration of soot in DPF forms ash, and the increases in the amount of ash
cause the increase of exhaust pressure which negatively affects engine
performance and the fuel efficiency. To prevent the above disadvantage
happening, ash cleaning should be done regularly. DPF system can be
disassembled into different parts for the convenience in cleaning. The ash
cleaning is recommended every 4,500 hours ; however, the period of cleaning is
depending widely on the operating condition, surroundings and engine oil.
WARNING :
1. ULSD should be used to obtain the normal DPF effect.
2. To secure proper DPF cleaning interval, the low ash engine lubricant oil
(CJ4 grade) should be used.
EJ9OM071
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