Operation and Maintenance Manual forWP10 Series Four-valve Diesel Engine (China IV, V)
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Figure 5-18 Filter element cleaning
Notice: 1) Do not damage the filter paper;2) Do not clean the filter paper with water or oil; 3) Do not knock the
filter element forcibly.
● Check urea dosing pump filter element
At the time of maintenance, it’s necessary to remove the filter element of urea dosing pump and thoroughly clean
with water before installation. Do not slap or knock the filter element forcibly.
● Check the urea nozzle gasket
At each replacement or disassembly of urea nozzle, it’s necessary to check the urea nozzle gasket. In event of
damage or deformation, replace the gasket.
● Clean the urea tank and urea tank filter element
At the time of maintenance, it’s necessary to check the cleanliness of urea tank and filter element and clean them
if necessary.
Maintenance of urea dosing pump
The urea dosing pump filter element of the DeNOx 2.2 system or DeNOx6-5 system shall be replaced every 3
years or 100,000 km. For the harsh application environments, the DEF will be seriously polluted, so the filter
element shall be replaced according to the actual situation. Before replacement, clean the outer surface of the urea
dosing pump, and prevent the filter element area from being polluted in the installation. The filter cover shall be
tightened with the torque of (20+5) Nm. The replacement of the filter element of DeNOx 2.2 or DeNOx6-5 is
shown in table 5-2 and table 5-3 respectively.
Table 5-2
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