Service Manual

Workman HDXPage 3 − 4Kubota EFI Gasoline Engine
Introduction
This Chapter gives information about specifications,
maintenance, troubleshooting, testing, and repair of the
Kubota EFI gasoline engine used in the Workman HDX.
Most repairs and adjustments require tools which are
commonly available in many service shops. The use of
some specialized test equipment is explained in the en-
gine service manual included at the end of this chapter.
However, the cost of the test equipment and the special-
ized nature of some repairs may dictate that the work be
done at an engine repair facility.
Service and repair parts for Kubota gasoline engines
are supplied through your local Toro Distributor. If a
parts list is not available, be sure to provide your distribu-
tor with the Toro model and serial number.
Traction Unit Operator’s Manuals
The Vehicle Operator’s Manual provides information re-
garding the operation, general maintenance and main-
tenance intervals for your Workman HDX. Refer to this
publication for additional information when servicing the
machine.
Kubota Workshop and Diagnostics Manuals
The engine that powers your Workman HDX is a Kubota
model WG972−G−E3F. Both the Kubota Workshop
Manual and Kubota Diagnostics Manual are available
for this engine. Make sure that the correct engine manu-
als are used when servicing the engine.
Kubota Gasoline Engine
The engine used in your Workman HDX is a Kubota
WG972 Series gasoline engine. Engine features in-
clude an electronic control unit (ECU) that controls a
common rail fuel injection system with direct injection,
electronic throttle valve (ETV), an electronic governor
and a catalytic muffler exhaust system with an oxygen
sensor. The ECU receives information from numerous
engine sensors. The information provided allows the en-
gine ECU to monitor and control engine operation for
optimum engine performance.
Figure 1