Toro Groundsmaster 4300-D Service Manual page 46

Removing the Exhaust System
Installing the Exhaust System
Diesel Engine: Service and Repairs
The engine that powers your Groundsmaster 4300-D machine is a Yanmar diesel
engine model 3TNV86CT that complies with EPA Tier 4F emission regulations.
The engine is equipped with an exhaust system that includes a diesel oxidation
catalyst (DOC) and a diesel-particulate filter (DPF).
These exhaust components require service or component replacement at regular
intervals; refer to the Operator's Manual. Additionally, the exhaust assembly
uses 2 temperature sensors and a pressure differential sensor, which are used
as inputs for the engine ECU to monitor the operation of the exhaust system.
The diesel-particulate filter (DPF) is cleaned periodically through a regenerative
process that is controlled by the engine ECU; refer to
3–5). The InfoCenter display will identify the status of DPF regeneration. At
recommended intervals, DPF reconditioning is necessary which will require
exhaust system disassembly. DPF reconditioning should be done by a company
that has the necessary equipment. Once the DPF has gone through the
reconditioning process, it can be re-installed in the exhaust system. Contact your
Toro Distributor for information on reconditioning the DPF.
The diesel oxidation catalyst (DOC) has a service life expectancy and requires
replacement at recommended intervals. Replacement of the DOC will require
exhaust system disassembly, removal of the existing DOC and installation
of the new DOC.
Information about the diesel-particulate filter (DPF) operation and maintenance
can be found in the Yanmar Engine Service Manual and Troubleshooting Manual.
A hot engine and exhaust system can cause burns.
Allow the engine and the exhaust system to cool before working
on or near them.
1. Park the machine on a level surface, lower the cutting decks, shut off the
engine, set the parking brake, and remove the key from the key switch.
2. Unlatch the hood and raise it.
3. Remove the exhaust tube as shown in
Note: The exhaust system DPF and DOC can be removed from the exhaust
system without removing the entire exhaust system from the engine. Refer to
the Yanmar Engine Service Manual for complete disassembly and assembly
procedures.
1. Install the exhaust tube as follows:
A. Install all the fasteners finger tight.
B. Tighten the flange nuts (item 5 in
C. Tighten the exhaust clamp (item 8 in
D. Tighten the muffler clamp (item 4 in
2. Lower the hood and secure it with the latches.
CAUTION
Figure
Figure
Figure
Figure
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Yanmar Engine (page
11.
11).
11).
11).
Groundsmaster
16226SL Rev C
® 4300-D