Kubota L4701, Operator'S Manual

Page: 47 / 142

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 burnt, and begins to
accumulate. Therefore, do not idle unnecessarily.
Regeneration
When there is instruction sign of regeneration 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.
3. DPF regeneration process
DPF regeneration process can be performed by choosing the auto-regeneration-mode or the regeneration-inhibit-
mode according to your job conditions.
For jobs not affected by hot gases emitted during regeneration, auto-regeneration-mode is advisable.
(1) Parked regeneration switch
(2) DPF INHIBIT switch (3) Regeneration indicator
(4) Parked regeneration indicator (5) Engine rpm increase indicator
(6) Engine warning indicator
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 48)
By effect of auto regeneration, work efficiency is improved. For details of auto regeneration, see Operating the engine
to regenerate the DPF for regeneration inhibit mode on page 46.
Regeneration inhibit mode
After starting the engine, if the DPF-INHIBIT-switch is pressed to turn on the DPF-INHIBIT-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 burnt, unless the
operator performs the regeneration work manually.
The regeneration-inhibit-mode is effective for work in poorly ventilated work spaces.
For details of regeneration prohibition, see Operating the engine to regenerate the DPF for regeneration inhibit mode
on page 46.
NOTE :
• If the engine is stopped once, the auto-regeneration-mode will be activated.
EXHAUST AFTERTREATMENT DEVICES OPERATING THE ENGINE
L4701
43