Maintenance; Flexible Coupling Installation; Diesel Particulate Filter (Dpf) - PREVOST H3-41 Maintenance Manual

SECTION 04 : EXHAUST AND AFTERTREATMENT
NOTE
The key to successful regeneration is high
exhaust temperature for an extended period of
time. For this reason, insulating blankets must
remain permanently on the exhaust system.
If insulating blankets are removed from the
system, the exhaust gases temperature may
not be high enough to permit efficient
particulate oxidation
regeneration, resulting
consumption due to overuse of active or
stationary regeneration.

2.2 FLEXIBLE COUPLING INSTALLATION

The flexible coupling contains a rigid interior
pipe (
Figure 2). To allow appropriate flexibility once
installed, be sure interior pipe is concentric to
flexible part and that the flexible coupling is
straight when installed. This piece of equipment
handles vibration and thermal expansion.
CAUTION
Adequately support the exhaust system line.
The load of the exhaust line must not be
transferred to the turbocharger.
FIGURE 2: FLEXIBLE COUPLING
10 PA1621 Maintenance Manual All Series | January 2017
during passive
in increased fuel

3. DIESEL PARTICULATE FILTER (DPF)

Besides trapping soot,
Particulate Filter) also traps the ash that has
been generated when additives in engine oil are
burned. However, unlike soot, ash cannot be
oxidized. The ash that accumulates in the filter
will eventually cause an increase in exhaust
back pressure. EMS will constantly monitor the
ash accumulation and forecast the approximate
time until DPF ash cleaning is required. This
allows you the opportunity to plan for the DPF
ash cleaning interval. If ash cleaning is not
performed proactively, and the back pressure
increases beyond the system limit, EMS will flag
the amber warning light on the telltale panel,
notifying the operator that an ash cleaning is
required. Clean remanufactured DPF cartridge
will be available through Prevost on an
exchange basis. For most vehicle applications
and duty cycle, this
approximately 200,000
(320,000 to 640,000 km) of operation.
WARNING
HOT SURFACES
Keep yourself clear of hot Aftertreatment
System surfaces, particularly during and after
active or stationary regeneration. Hot surfaces
can cause serious burns.
Make sure Aftertreatment
components are cold before handling.

MAINTENANCE

DPF (Diesel Particulate Filter)
Either clean or replace filter cartridge at the
intervals specified by the Lubrication And
Servicing Schedule
LUBRICATION & SERVICING.
the DPF (Diesel
will occur after
to 400,000 miles
System
in Section 24: