Reference
Only
POWER TRAIN
MLC650 SERVICE/MAINTENANCE MANUAL
7-20
Published 09-09-16, Control # 229-09
DIESEL PARTICULATE FILTER
The diesel particulate filter (DPF), located left of the engine,
captures soot and ash from the engine exhaust.
•
Soot is partially burned fuel particles that occur during
normal operation (black smoke).
Soot is automatically removed by a process called
regeneration.
•
Ash is partially burned engine oil particles that occur
during normal operation.
Ash removal—The DPF must be periodically removed
and replaced (see
DPF Replacement on page 7-21).
Regeneration
Regeneration is the process of converting soot collected in
the DPF into carbon dioxide. Regeneration requires heat.
Two types of regeneration are used:
•
Passive
•
Active
For information on the related switches and faults, see
Section 3 of the Operator Manual.
Passive Regeneration
P a s s i v e r e g e n e r a t i o n o c c u r s w h e n t h e e x h a u s t
temperatures are naturally high enough to oxidize the soot
faster than it is collected in the DPF.
The process typically occurs during normal crane operation.
The operator will not know when passive regeneration is
occurring.
Active Regeneration
Active regeneration occurs when the exhaust temperatures
are not naturally high enough to oxidize the soot faster than it
is collected in the DPF. If this happens, the engine control
module (ECM) will initiate the process (see engine
manufacturer’s manual for detailed instructions).
The process occurs more frequently in cranes operated at
light or no load.
Active regeneration will be transparent to the operator,
except there may be an increase in turbocharger noise and
exhaust temperature. The High Exhaust Temperature icon
should be on during regeneration and remain on until
r e ge ne r at io n cy c le i s c om pl et ed a nd t he ex h au st
temperatures return to normal.
Manual Regeneration
Manual regeneration is active regeneration that is initiated by
the operator. The DPF icon
will come on if manual
regeneration is required.
Regeneration Inhibit
Do not use the inhibit switch unless specifically instructed to
do so by the Manitowoc Crane Care Lattice Team.
NOTE:
The inhibit switch is only for special circumstances
i n w h i c h i t i s d e s i r a b l e t o d i s a b l e a c t i v e
regeneration.
Prolonged engine operation with inhibit on will
cause the DPF to fill with soot. Too much soot
could cause the engine to stop. If that occurs, it will
be necessary to clean the DPF before the engine
can be restarted.
Maintenance
If ash buildup is not removed, the DPF can be damaged or its
life reduced.
At a minimum service interval of 4,500 operating hours
(roughly every two years of one-shift operation), the DPF
should be sent to the manufacturer for cleaning or
exchanged for a clean one.
DPF cleaning requires special tools and equipment and
should not be attempted by field service personnel.
For inspection and/or cleaning, the DPF must be removed. It
may be reusable.
NOTE:
If engine Fault Code 1981 or 1922 has been noted
and the DPF is contaminated with coolant, the DPF
must be removed and replaced.
See the aftertreatment assembly drawing for removal,
installation, and orientation of the diesel particulate filter.
Summary of Contents for MLC650
Page 1: ...R e f e r e n c e O n l y Service Maintenance Manual Manitowoc MLC650 ...
Page 2: ...R e f e r e n c e O n l y ...
Page 4: ...R e f e r e n c e O n l y THE ORIGINAL LANGUAGE OF THIS PUBLICATION IS ENGLISH ...
Page 375: ...R e f e r e n c e O n l y ...
Page 376: ...R e f e r e n c e O n l y ...
