Iveco Daily Euro 4. Manual — part 10
108627
For refitting, reverse the operations described for
disconnection observing following warnings:
- check the conditions of the elastic dowels,
taking care to replace the defective
ones (if any);
- replace gasket by new parts;
- tighten nuts and screws at prescribed torque.
Refitting
Figure 28
Place the vehicle on a pit or auto lift.
Disconnect oxygen sensor electric connection (4).
Remove fasteners (2), then disconnect exhaust pipe terminal
(3) from turboblower flange (1).
Properly support the assembly, then use a suitable lever to
release supporting hooks (6 and 8) from elastic dowels (5 and
7) and take the assembly off the vehicle.
Take the assembly components apart, by loosening the
retaining clamps.
Removal
F1A ENGINE
27
D
AILY
E
URO
EXHAUST PIPE ASSEMBLY REMOVAL/REFITTING
105073
Place the vehicle on a pit or auto lift.
Carry out the following operations by acting from under the
vehicle:
- unscrew nuts (2) securing silencer (3) supporting
bracket (1) to the vehicle chassis;
- unscrew and remove fastening screws (4) of flanges (5)
connecting exhaust silencer (3) and D.P.F. particulate
filter (8);
- remove exhaust silencer (3).
D.P.F. catalyst removal
- unscrew and remove the exhaust gas temperature
sensors at the catalyst inlet
(16) and outlet (17);
- unscrew to disconnect couplings (6 and 12) securing
rigid pipes (7 and 11)
running to the pressure sensor to D.P.F. catalyst (8);
- properly secure D.P.F. catalyst (8) to the vehicle chassis;
- unscrew nuts (9) securing D.P.F. catalyst (8) filter
supporting bracket (10) to the
vehicle chassis;
- unscrew and remove fastening screws (13) of flanges
(15) connecting D.P.F.
catalyst (8) filter to the exhaust gas outlet pipe from
turbine (14);
- remove D.P.F. catalyst (8) filter.
Exhaust silencer removal
For refitting, reverse the operations described for
disconnection observing following warnings:
- check the conditions of the elastic dowels,
taking care to replace the defective
ones (if any);
- replace gasket by new parts;
- tighten nuts and screws at prescribed torque.
Refitting
After the operation has been completed, and in the event
that either the D.P.F. catalyst or the differential sensor
(delta-p) needs replacing, follow the instructions given in the
respective chapters.
Figure 29
28
F1A ENGINE
D
AILY
E
URO
4
507130
Replacing D.P.F. catalyst
Replacing D.P.F. catalyst needs that all the counters of below
indicated parameters are reset in the central unit, as:
- particulate quantity in new filter is zero, so, if particulate
quantity is not reset, filter regeneration will start even if it
is not necessary;
- quantity of accumulated ashes is zero, so, if ashes counter
is not reset, regeneration frequency will be greater than
needed, consequently increasing fuel consumption, and
particulate filter thermal fatigue; and, in extreme cases,
there will be an unnecessary request to refill engine oil;
- post-injected fuel quantity is zero, so, if post-injected fuel
counter is not reset, there may be an early request to refill
engine oil.
The meters used to evaluate the above-mentioned
parameters can be reset by means of the IVECO MODUS -
E.A.SY. - IT 2000 diagnosis instruments, by programming the
control unit again and performing the DPF catalyst
replacement procedure, in accordance with the instructions
given by the diagnosis instruments.
Where both DPF catalyst is replaced and engine oil
is refilled, resetting post-injected fuel counter is not
necessary.
NOTE
540743
Replacing
differential
sensor
(delta-p)
Pressure difference between gas pressure at catalyst module
inlet and gas pressure at ceramic walls filter outlet is
converted into a voltage signal (Vout) by pressure sensor.
During engine running, E.D.C. 16 central unit performs
checks on differential pressure sensor drift and calculates
engine compensation and running values, and corrects them.
Consequently, after replacing the sensor, it is necessary to
reset rectification coefficients.
- regeneration status: regeneration unnecessary, in progress,
interrupted, resumed;
- miles covered and times from last complete regeneration;
- differential pressure (delta-p) sensor drift self-rectification;
- oxidiser catalyst drift; consequently, if catalyst ageing
function
is
not
reset,
quantities
of
unnecessary
post-injections might be present.
The meters used to evaluate the above-mentioned
parameters can be reset by means of the IVECO MODUS -
E.A.SY. - IT 2000 diagnosis instruments, by programming the
control unit again and performing the differential sensor
replacement procedure, in accordance with the instructions
given by the diagnosis instruments.
F1A ENGINE
29
D
AILY
E
URO
108321
Figure 30
30
F1A ENGINE
D
AILY
E
URO
4
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст