Toro Groundmaster 31900, Service Manual

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Yanmar Engines
g295809
Figure 10
1. Yanmar 3TNV80F engine 3. Diesel particulate filter (DPF)
2. Yanmar 3TNV88C-DTR engine 4. Yanmar 3TNV88-BDTR engine
The engine that powers the Groundsmaster 3200 (model 31900 and 31901) is
a Yanmar 3TNV80F. The engine that powers the Groundsmaster 3300/3310
(model 31902 and 31903) is a Tier-4 compliant Yanmar 3TNV88C-DTR. The
engine that powers the Groundsmaster 3300/3310 (model 31907 and 31909)
is a Yanmar 3TNV88-BDTR.
The engine used on Groundsmaster 3300 machine is a Yanmar TNV series diesel
engine that complies with EPA Tier 4F emissions regulations. The engines (for
models 31902 and 31903) include an electronic control unit (ECU), an exhaust
gas recirculation valve (EGR) and a diesel exhaust particulate filter (DPF).
The ECU combines numerous engine sensors, monitor and control the engine
operation for optimum performance. During the operation of the engine, if
conditions warrant, the engine ECU may generate an engine fault. Use the Toro
Display Module (TDM display/controller) to identify the engine fault; refer to
the
Yanmar Troubleshooting Manual , or contact an Authorized Toro Distributor
for assistance.
Diesel Particulate Filter
The diesel particulate filter (DPF) used on Yanmar Tier 4F compliant engine is
designed to breakdown the hazardous elements in the exhaust and prevent the
discharge of unburned 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 regarding
the Diesel Particulate Filter can be found in the
Yanmar Operational 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
Groundsmaster ® 3200, 3300 and 3310 Page 4–5 Engine: General Information
19240SL Rev A