Service Manual

Groundsmaster 4500−D/4700−DPage 3 − 4Yanmar Diesel Engine
General Information
This Chapter gives information about specifications and
repair of the diesel engine used in the Groundsmaster
4500−D and 4700−D.
General maintenance procedures are described in your
Traction Unit Operator’s Manual. Information on engine
troubleshooting, testing, disassembly and assembly is
identified in the Yanmar Workshop Manual.
Most repairs and adjustments require tools which are
commonly available in many service shops. Special
tools are described in the Yanmar Workshop Manual.
The use of some specialized test equipment is ex-
plained. However, the cost of the test equipment and the
specialized nature of some repairs may dictate that the
work be done at an engine repair facility.
Service and repair parts for Yanmar engines are sup-
plied through your Authorized Toro Distributor. If no
parts list is available, be prepared to provide your distrib-
utor with the Toro model and serial number of your ma-
chine.
Operator’s Manuals
The Traction Unit and Yanmar Engine Operator’s Manu-
als provide information regarding the operation, general
maintenance and maintenance intervals for your
Groundsmaster machine. Refer to these publications
for additional information when servicing the machine.
Yanmar Service and Troubleshooting Manuals
The engine that powers your Groundsmaster machine
is either a Yanmar model 4TNV84T−Z (used on
Groundsmaster models 30873 and 30874) (Tier 4i) or a
Yanmar model 4TNV86CT (used on Groundsmaster
models 30881 and 30882) (Tier 4). Both the Yanmar
Service Manual and Yanmar Troubleshooting Manual
are available for these engines. Make sure that the cor-
rect engine manuals are used when servicing the en-
gine on your Groundsmaster.
Stopping the Engine
IMPORTANT: Before stopping the engine after
mowing or full load operation, cool the turbo-char-
ger by allowing the engine to run at low idle speed
for five (5) minutes. Failure to do so may lead to tur-
bo-charger trouble.