Kubota M4N-071, Operator'S Manual

Page: 40 / 152

M5N-091, M5N-111
(1) Diesel particulate filter (DPF)
1. Handling points
When a specific amount of particulate matter (PM) has
accumulated in the DPF muffler, it is necessary to
refresh the DPF muffler by burning the PM inside it.
This burning off work is called
“Regeneration” .
To extend operating time to reach this regeneration,
and to avoid DPF muffler trouble, make sure to observe
the following handling matters.
Fuel
Be sure to use ultra-low sulfur fuel (S15).
IMPORTANT :
• Use of diesel fuel other than ultra-low sulfur fuel
may adversely affect the engine and DPF
performance.
Use of fuels other than ultra-low sulfur fuel
(S15) may not meet regulations for your region.
Engine oil
Use DPF-compatible oil (CJ-4) for the engine.
IMPORTANT :
• If any engine oil other than CJ-4 is used, the
DPF may become clogged earlier than expected
and the fuel economy may drop.
Prohibition of unnecessary idling operation
Generally, the lower the engine speed, the lower the
exhaust gas temperature is, so the PM contained in
exhaust gas will not be burned, and begins to
accumulate. Therefore, do not idle unnecessarily.
Regeneration
When there is “Regeneration” instruction sign by lamp
or buzzer, immediately perform the required procedure
for regeneration.
IMPORTANT :
• Interrupting the regeneration cycle or
continuing operation while ignoring the warning
signs may cause DPF and engine damage.
2. DPF regeneration process
DPF regeneration process can be performed by
choosing
“Auto regeneration” or “Regeneration inhibit”
mode according to your job conditions.
For jobs not affected by hot gases emitted during
regeneration,
“Auto regeneration” is advisable.
Auto regeneration mode
When starting the engine (switch operation is
unnecessary), the
“Auto regeneration” mode is
automatically activated.
With the auto regeneration mode on, when a specific
amount of PM has accumulated, and the regeneration
conditions are satisfied, the DPF will be automatically
regenerated whether the tractor is in motion or parked.
(See Tips on diesel particulate filter (DPF) regeneration
on page 40.)
In this way, work efficiency is improved. For more
details, read the
“Auto regeneration” section of this
manual.
(See Operating procedure for auto regeneration mode
on page 35.)
Regeneration inhibit mode
After starting the engine, if the “DPF inhibit switch” is
pressed to turn on the switch lamp, the “Regeneration
inhibit” mode will be activated.
With “Regeneration inhibit” mode on, the PM which has
accumulated inside the DPF will not be burned, unless
the operator performs the regeneration work manually.
The
“Regeneration inhibit” mode is effective for work in
poorly ventilated workspaces.
For more details, read the regeneration prohibition
section of this manual.
(See Operating procedure for regeneration inhibit mode
on page 37.)
NOTE :
• If the engine is stopped once, the “Auto
regeneration” mode will be activated.
OPERATING THE ENGINE DIESEL PARTICULATE FILTER (DPF) MUFFLER
34
M4N-071, M5N-091, M5N-111