Yanmar Engine; Diesel Particulate Filter (Dpf) - Toro Reelmaster 7000-D Service Manual

Yanmar Engine:

The engine used on Reelmaster is a Yanmar TNV
Series, turbocharged, diesel engine that complies with
EPA Tier 4 emission regulations. Engine features in-
clude an electronic control unit (ECU) that controls a
common rail fuel injection system with direct injection,
water−cooled exhaust gas recirculation (EGR), an elec-
tronic governor, an exhaust system diesel oxidation
catalyst (DOC) and an exhaust diesel particulate filter
(DPF) with active regeneration. Glow plugs are used to
assist starting the engine. Numerous engine sensors
are used to allow the engine ECU to monitor and control
engine operation for optimum engine performance.
During the operation of the engine, if conditions warrant,
the engine ECU may generate an engine fault. Use the
machine InfoCenter to identify the engine fault; refer to
the Yanmar Troubleshooting Manual, or contact an Au-
thorized Toro Distributor for assistance.

Diesel Particulate Filter (DPF)

The diesel particulate filter (DPF) used on Yanmar Tier
4F compliant engines is designed to breakdown the
hazardous elements in the exhaust and prevent the dis-
charge of unburnt fuel or oil known as particulate matter
or soot. The DPF includes a Diesel Oxidation Catalyst
(DOC), a Soot Filter (SF), 2 temperature sensors, and
a pressure differential sensor. Additional information re-
garding the Diesel Particulate Filter (DPF) can be found
in the Yanmar Operation Manual – Industrial Engines
TNV supplied with your machine.
Regeneration
The engine ECU monitors the exhaust pressure before
and after the soot filter in the DPF to determine if soot is
accumulating. If soot is accumulating during normal en-
gine operation, the pressure differential will increase.
The increase in pressure will signal the engine to begin
a process called Regeneration. Regeneration increases
the exhaust temperature and the length of time the en-
gine operates at a higher than normal exhaust tempera-
ture, incinerating the built up soot and turning it into ash.
The different types of regeneration used are listed in or-
der based on the amount of particulate matter in the soot
filter (least to most).
Reelmaster 7000−D
Note: The user interface and InfoCenter displays for
DPF regeneration changed with machine software
122-0251E. Use the InfoCenter About screen to verify
the software installed on the machine.
− For machines with software 122-0251A thru D: Com-
plete DPF regeneration instructions can be found in the
updated traction unit Operator's Manual for the specific
machine. Visit www.toro.com to download the updated
traction unit Operator's Manual for the machine.
− For machines with software 122-0251E and up: Com-
plete DPF regeneration instructions can be found in the
traction unit Operator's Manual. Visit www.toro.com to
download the traction unit Operator's Manual with the
correct DPF regeneration instructions for the machine.
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Figure 2
Yanmar Diesel Engine