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DCA70SSJU4i
MAINTENANCE
Figure 62. ECU DPF Engine Shutdown
Series 800 Controller
ECU
Engine Started
Shutdown
Pre-Alarm
Alarm
Acknowledge
Screen
Change
Program
Exit
Option
DPF STAT
NOTICE
If the RED engine shutdown LED is ever ON (Figure 62),
John Deere recommends that the DPF be removed,
cleaned or replaced. In addition the shutdown code
must be cleared. To clear the code, the ECM must
be reset by a licensed John Deere Engine Service
Technician, using John Deere service software.
NOTICE
Soot and ash will accumulate in the DPF over time and
must be cleaned. The ash is a result of the normal oil
consumption while the engine is operated. The ash
cleaning interval will largely depend on the engine's
duty cycle and condition. Normal service intervals for
cleaning ash from the DPF is every 6 months (5000
hours).
Follow the steps below to initiate a forced regeneration:
1. Verify that the pre-alarm LED is ON or
and the DPF symbol is shown on the
ECU display.
2. Place all circuit breakers in the OFF position.
3. Place the engine speed switch in the position.
4. Press the button on the ECU controller
and select FORCE REGEN mode.
5. Press and hold the request until the
message is displayed on the screen, then release.
6. Once activated, regeneration will start automatically
and the engine idling speed will increase through the
forced regeneration cycle. This process will last
anywhere from 30 minutes to 1-1/2 hours.
NOTICE
During the regeneration cycle the High
Exhaust System Temperature (HEST)
symbol may be displayed. Display of
this symbol can be considered normal
during the regeneration period.
ENGINE
EXHAUST (IN)
DIESEL OXIDATION
CATALYST (DOC)
DIESEL PARTICULATE
FILTER (DPF)
ENGINE
EXHAUST (OUT)
Figure 63. Typical DOC/DPF Unit