Toro Groundsmaster 5900 Series Service Manual page 82

1. Exhaust gasket
2. Flange head screw (4)
3. Flange nut (5)
4. Exhaust elbow
5. DOC temp sensor (inlet)
6. DOC temp sensor (outlet)
7. Band
8. Band clip
9. Band
10. Flat washer (3)
11. DPF assembly
12. DOC assembly
13. Flange head screw (20)
14. DPF stiffener
Exhaust System Removal
Yanmar Diesel Engine: Service and Repairs
Figure 17 (continued)
15. DPF stiffener (5)
16. DPF gasket (2)
17. Lock nut (20)
18. DPF stiffener w/lifting lug
19. DPF stiffener
20. Outlet flange
21. Flange head screw (2)
22. Intake manifold
23. Mount
24. Flange head screw (5)
25. Mount
26. Lock nut (2)
27. Flange head screw (4)
28. Exhaust pressure pipe (DPF inlet)
Groundsmaster 5900/5910 models that are powered by a diesel engine that
complies with EPA Tier 4 emission regulations are 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 intervals identified in your Operator's Manual. Additionally, the
exhaust assembly uses two (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 (see the
Unit (ECU) (page 4–3)). The InfoCenter display will identify the status of DPF
regeneration. At recommended intervals, DPF reconditioning is necessary which
will require exhaust system disassembly, DPF removal and DPF reconditioning
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.
Additional information about the diesel particulate filter (DPF) operation and
maintenance can be found in the
Troubleshooting Manual.
Note: The exhaust system DPF and DOC can be removed from the exhaust
system without removing the entire exhaust from the engine. See the
Service Manual for complete disassembly and assembly procedures.
The engine and exhaust system may be hot. To avoid possible
burns, allow the engine and exhaust system to cool before working
on the exhaust system.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
Yanmar Service Manual
CAUTION
Page 4–14
Exhaust pressure pipe (DPF outlet)
Sensor gasket (4)
Banjo bolt (2)
Hose clip (4)
Exhaust pressure hose (DPF inlet)
Exhaust pressure hose (DPF outlet)
Pressure sensor
Flange head screw (2)
Connector clip (2)
Sensor bracket
Flange head screw (2)
Lifting lug
Flange head screw (2)
Engine Electronic Control
and the Yanmar
Yanmar
Groundsmaster ® 5900 & 5910
16227SL Rev B