3.1 PM warning level and required procedures
During auto regeneration mode when the PM level has built up in the DPF, the regeneration cycle will begin
automatically.
If the regeneration cycle is interrupted or the regeneration conditions are not satisfied, the buzzer starts sounding and
the indicator display changes in response to the PM level in order to prompt the operator to perform the required
procedure listed in the following table.
IMPORTANT :
• Once the regeneration level has been reached, immediately perform the required procedure for
regeneration.
Interrupting the regeneration cycle or continuing operation while ignoring the warning signs may cause
DPF and engine damage.
Auto mode
DPF system status
Required procedure
PM warning level: 1
Buzzer: Not sounding
The regeneration indicator starts flashing.
A specific amount of PM has accumulated in
the DPF muffler.
Continue to work the tractor to raise the DPF
temperature.
The rpm increase indicator starts flashing.
Continue the work and increase the engine
rpm until the indicator turns
“OFF”
.
The regeneration indicator will stop flashing
and remain
“ON”
constantly.
The regeneration cycle begins and continues
until cycle is complete then the indicator will
turn
“OFF”
.
PM warning level: 2-1
Buzzer: Sounding every 5 sec-
onds
If the regeneration cycle was interrupted or conditions are not satisfied for regeneration then DPF system is
now in Level 2.
The regeneration indicator starts flashing.
Start the regeneration, referring to PM warn-
ing level: 1 above.
Now the parked regeneration indicator starts
flashing, and the parked regeneration can al-
so be started.
If the regeneration conditions are not met,
perform the parked regeneration procedure.
(See Operating procedure for parked regener-
ation on page 39.)
PM warning level: 2-2
Buzzer: Sounding every 3 sec-
onds
The rpm increase indicator starts flashing.
The parked regeneration indicator starts
flashing.
PM warning level: 3
Buzzer: Sounding every 1 second
Engine output: 50%
If the regeneration fails in the warning level 2:
The engine warning indicator starts flashing.
Immediately discontinue working the tractor
and begin the parked regeneration cycle proc-
ess.
(See Operating procedure for parked regener-
ation on page 39.)
At this PM warning level, the auto regenera-
tion mode does not function.
If the tractor is operated further, the regenera-
tion cycle will be disabled.
The parked regeneration indicator starts
flashing.
PM warning level: 4
Buzzer: Sounding every 1 second
Engine output: 50%
If the parked regeneration is interrupted or the tractor is continuously operated in the warning level 3:
The engine warning indicator remains con-
stantly
“ON”
.
Immediately move the tractor to a safe place,
park it there and turn the engine
“OFF”
.
Contact your local KUBOTA Dealer.
•
At this level, do not continue to operate
the tractor; otherwise, damage will result
to the DPF and engine.
OPERATING THE ENGINE
DIESEL PARTICULATE FILTER (DPF) MUFFLER
36
M4N-071, M5N-091, M5N-111
Summary of Contents for M4N-071
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