Filler Neck Strainer; Aftertreatment Hydrocarbon Doser; Replacement - PREVOST H3-41 Maintenance Manual

SECTION 04 : EXHAUST AND AFTERTREATMENT
MAINTENANCE
Replace DEF pump
equalizer at the intervals specified by the
Lubrication And Servicing Schedule in Section
24: LUBRICATION & SERVICING.

6.4 FILLER NECK STRAINER

If the DEF tank filler neck strainer (figure 10)
becomes obstructed with foreign matter and
debris, remove and clean strainer as follows;
1. Remove filler neck cap.
2. Release the retaining tabs and remove filler
neck strainer from the filler neck. Discard the
old seal.
3. Clean and reinstall strainer into DEF tank
filler neck with new seal.
4. Insert until the retaining tabs snap into the
filler neck.
7. AFTERTREATMENT HYDROCARBON
DOSER
Proper functioning
hydrocarbon doser
hydrocarbon injector (AHI) is required in order to
obtain efficient regeneration process of the DPF.
Clogged aftertreatment hydrocarbon doser will
result in clogged DPF.
In addition to the activation of the CHECK
telltale, emission of diagnostic troubleshooting
codes (DTC) by the engine ECM (MID128) will
indicate malfunction of the aftertreatment system
and/or aftertreatment hydrocarbon doser. DTC
may be accessed through the Driver Information
Display. Select DIAGNOSTICS menu then
FAULT DIAGNOSTICS and ENGINE ECU
submenus.
Check status of the aftertreatment system
through the Driver Information Display. Select
AFTERTREATMENT menu then ATS STATUS.
Then check the DPF soot level with SOOT
LEVEL GAUGE.
PA1615 Maintenance Manual All Series | Section 04 revised September 2016
20
filter element and
of the aftertreatment
a.k.a. aftertreatment
MAINTENANCE

Aftertreatment hydrocarbon doser

Replace the aftertreatment hydrocarbon doser
at the intervals specified by the Lubrication And
Servicing Schedule
LUBRICATION & SERVICING.

7.1 REPLACEMENT

1. Remove fastener and p-clamp securing
the line to the mounting bracket on the
diffuser pipe.
WARNING
Fuel leaked or spilled onto hot surfaces or
electrical components can cause a fire and
result in component damage and serious
personal injury.
2. Disconnect
aftertreatment hydrocarbon injector fitting.
Collect any residual fuel that might be in the
line in a suitable container.
CAUTION
Do not kink the line. Kinking the line may
result in leakage.
FIGURE 13: AFTERTREATMENT HYDROCARBON
DOSER
in Section 24:
the line from the