Maintenance & Adjustment
170
D760.H03E-001.H1907
Urea pump maintenance
During the use of the jet system, attention
should be paid to:
1. After stopping the car and shutting down the
engine, the battery power cannot be cut off
immediately, and the post-processing sys-
tem needs to complete the emptering pro-
cess, which lasts about 5 minutes
(depending on the situation of the vehicle
traveling far before stopping), that is, the
power cannot be cut off within 90 seconds
after stopping the car.
2. Regularly check whether there is any leak-
age or white crystallite at the quick plug joint
of the post-treatment jet unit. If there is any
leakage or crystallite, please replace the
new joint in time.
3. The metering pump filter is used to prevent
foreign matters that may be suspended in
vehicle urea from entering the injection sys-
tem. Debris may cause permanent damage
to urea pumps or urea nozzles and prema-
ture failure.
Urea pump filter
Replacement cycle
Check the maintenance period refer to
page 208
1. Urea pump injection unit
2. Filter element of urea pump filter
3. Filter shell of urea pump
1. Urea pump injection unit
2. Filter element of urea pump filter
3. Filter shell of urea pump
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